+++ /dev/null
-/**
- ******************************************************************************
- * @file stm32f30x_usart.c
- * @author MCD Application Team
- * @version V1.1.0
- * @date 27-February-2014
- * @brief This file provides firmware functions to manage the following
- * functionalities of the Universal synchronous asynchronous receiver
- * transmitter (USART):
- * + Initialization and Configuration
- * + STOP Mode
- * + AutoBaudRate
- * + Data transfers
- * + Multi-Processor Communication
- * + LIN mode
- * + Half-duplex mode
- * + Smartcard mode
- * + IrDA mode
- * + RS485 mode
- * + DMA transfers management
- * + Interrupts and flags management
- *
- * @verbatim
- ===============================================================================
- ##### How to use this driver #####
- ===============================================================================
- [..]
- (#) Enable peripheral clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE)
- function for USART1 or using RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE)
- function for USART2, USART3, UART4 and UART5.
- (#) According to the USART mode, enable the GPIO clocks using
- RCC_AHBPeriphClockCmd() function. (The I/O can be TX, RX, CTS,
- or and SCLK).
- (#) Peripheral's alternate function:
- (++) Connect the pin to the desired peripherals' Alternate
- Function (AF) using GPIO_PinAFConfig() function.
- (++) Configure the desired pin in alternate function by:
- GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF.
- (++) Select the type, pull-up/pull-down and output speed via
- GPIO_PuPd, GPIO_OType and GPIO_Speed members.
- (++) Call GPIO_Init() function.
- (#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware
- flow control and Mode(Receiver/Transmitter) using the SPI_Init()
- function.
- (#) For synchronous mode, enable the clock and program the polarity,
- phase and last bit using the USART_ClockInit() function.
- (#) Enable the USART using the USART_Cmd() function.
- (#) Enable the NVIC and the corresponding interrupt using the function
- USART_ITConfig() if you need to use interrupt mode.
- (#) When using the DMA mode:
- (++) Configure the DMA using DMA_Init() function.
- (++) Activate the needed channel Request using USART_DMACmd() function.
- (#) Enable the DMA using the DMA_Cmd() function, when using DMA mode.
- [..]
- Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections
- for more details.
-
- @endverbatim
-
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- */
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f30x_usart.h"
-#include "stm32f30x_rcc.h"
-
-/** @addtogroup STM32F30x_StdPeriph_Driver
- * @{
- */
-
-/** @defgroup USART
- * @brief USART driver modules
- * @{
- */
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-
-/*!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) */
-#define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M | USART_CR1_PCE | \
- USART_CR1_PS | USART_CR1_TE | \
- USART_CR1_RE))
-
-/*!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) */
-#define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN | USART_CR2_CPOL | \
- USART_CR2_CPHA | USART_CR2_LBCL))
-
-/*!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) */
-#define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE))
-
-/*!< USART Interrupts mask */
-#define IT_MASK ((uint32_t)0x000000FF)
-
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/** @defgroup USART_Private_Functions
- * @{
- */
-
-/** @defgroup USART_Group1 Initialization and Configuration functions
- * @brief Initialization and Configuration functions
- *
-@verbatim
- ===============================================================================
- ##### Initialization and Configuration functions #####
- ===============================================================================
- [..]
- This subsection provides a set of functions allowing to initialize the USART
- in asynchronous and in synchronous modes.
- (+) For the asynchronous mode only these parameters can be configured:
- (++) Baud Rate.
- (++) Word Length.
- (++) Stop Bit.
- (++) Parity: If the parity is enabled, then the MSB bit of the data written
- in the data register is transmitted but is changed by the parity bit.
- Depending on the frame length defined by the M bit (8-bits or 9-bits),
- the possible USART frame formats are as listed in the following table:
- [..]
- +-------------------------------------------------------------+
- | M bit | PCE bit | USART frame |
- |---------------------|---------------------------------------|
- | 0 | 0 | | SB | 8 bit data | STB | |
- |---------|-----------|---------------------------------------|
- | 0 | 1 | | SB | 7 bit data | PB | STB | |
- |---------|-----------|---------------------------------------|
- | 1 | 0 | | SB | 9 bit data | STB | |
- |---------|-----------|---------------------------------------|
- | 1 | 1 | | SB | 8 bit data | PB | STB | |
- +-------------------------------------------------------------+
- [..]
- (++) Hardware flow control.
- (++) Receiver/transmitter modes.
- [..] The USART_Init() function follows the USART asynchronous configuration
- procedure(details for the procedure are available in reference manual.
- (+) For the synchronous mode in addition to the asynchronous mode parameters
- these parameters should be also configured:
- (++) USART Clock Enabled.
- (++) USART polarity.
- (++) USART phase.
- (++) USART LastBit.
- [..] These parameters can be configured using the USART_ClockInit() function.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Deinitializes the USARTx peripheral registers to their default reset values.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @retval None
- */
-void USART_DeInit(USART_TypeDef* USARTx)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
-
- if (USARTx == USART1)
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
- }
- else if (USARTx == USART2)
- {
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
- }
- else if (USARTx == USART3)
- {
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
- }
- else if (USARTx == UART4)
- {
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
- }
- else
- {
- if (USARTx == UART5)
- {
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
- }
- }
-}
-
-/**
- * @brief Initializes the USARTx peripheral according to the specified
- * parameters in the USART_InitStruct .
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
- * that contains the configuration information for the specified USART peripheral.
- * @retval None
- */
-void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
-{
- uint32_t divider = 0, apbclock = 0, tmpreg = 0;
- RCC_ClocksTypeDef RCC_ClocksStatus;
-
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
- assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
- assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
- assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
- assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
- assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
-
- /* Disable USART */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
-
- /*---------------------------- USART CR2 Configuration -----------------------*/
- tmpreg = USARTx->CR2;
- /* Clear STOP[13:12] bits */
- tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP);
-
- /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
- /* Set STOP[13:12] bits according to USART_StopBits value */
- tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;
-
- /* Write to USART CR2 */
- USARTx->CR2 = tmpreg;
-
- /*---------------------------- USART CR1 Configuration -----------------------*/
- tmpreg = USARTx->CR1;
- /* Clear M, PCE, PS, TE and RE bits */
- tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK);
-
- /* Configure the USART Word Length, Parity and mode ----------------------- */
- /* Set the M bits according to USART_WordLength value */
- /* Set PCE and PS bits according to USART_Parity value */
- /* Set TE and RE bits according to USART_Mode value */
- tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
- USART_InitStruct->USART_Mode;
-
- /* Write to USART CR1 */
- USARTx->CR1 = tmpreg;
-
- /*---------------------------- USART CR3 Configuration -----------------------*/
- tmpreg = USARTx->CR3;
- /* Clear CTSE and RTSE bits */
- tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK);
-
- /* Configure the USART HFC -------------------------------------------------*/
- /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
- tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
-
- /* Write to USART CR3 */
- USARTx->CR3 = tmpreg;
-
- /*---------------------------- USART BRR Configuration -----------------------*/
- /* Configure the USART Baud Rate -------------------------------------------*/
- RCC_GetClocksFreq(&RCC_ClocksStatus);
-
- if (USARTx == USART1)
- {
- apbclock = RCC_ClocksStatus.USART1CLK_Frequency;
- }
- else if (USARTx == USART2)
- {
- apbclock = RCC_ClocksStatus.USART2CLK_Frequency;
- }
- else if (USARTx == USART3)
- {
- apbclock = RCC_ClocksStatus.USART3CLK_Frequency;
- }
- else if (USARTx == UART4)
- {
- apbclock = RCC_ClocksStatus.UART4CLK_Frequency;
- }
- else
- {
- apbclock = RCC_ClocksStatus.UART5CLK_Frequency;
- }
-
- /* Determine the integer part */
- if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
- {
- /* (divider * 10) computing in case Oversampling mode is 8 Samples */
- divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate));
- tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate));
- }
- else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
- {
- /* (divider * 10) computing in case Oversampling mode is 16 Samples */
- divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate));
- tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate));
- }
-
- /* round the divider : if fractional part i greater than 0.5 increment divider */
- if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2)
- {
- divider++;
- }
-
- /* Implement the divider in case Oversampling mode is 8 Samples */
- if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
- {
- /* get the LSB of divider and shift it to the right by 1 bit */
- tmpreg = (divider & (uint16_t)0x000F) >> 1;
-
- /* update the divider value */
- divider = (divider & (uint16_t)0xFFF0) | tmpreg;
- }
-
- /* Write to USART BRR */
- USARTx->BRR = (uint16_t)divider;
-}
-
-/**
- * @brief Fills each USART_InitStruct member with its default value.
- * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
- * which will be initialized.
- * @retval None
- */
-void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
-{
- /* USART_InitStruct members default value */
- USART_InitStruct->USART_BaudRate = 9600;
- USART_InitStruct->USART_WordLength = USART_WordLength_8b;
- USART_InitStruct->USART_StopBits = USART_StopBits_1;
- USART_InitStruct->USART_Parity = USART_Parity_No ;
- USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
- USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
-}
-
-/**
- * @brief Initializes the USARTx peripheral Clock according to the
- * specified parameters in the USART_ClockInitStruct.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
- * structure that contains the configuration information for the specified
- * USART peripheral.
- * @retval None
- */
-void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
-{
- uint32_t tmpreg = 0;
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
- assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
- assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
- assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
- assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
-/*---------------------------- USART CR2 Configuration -----------------------*/
- tmpreg = USARTx->CR2;
- /* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */
- tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK);
- /* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/
- /* Set CLKEN bit according to USART_Clock value */
- /* Set CPOL bit according to USART_CPOL value */
- /* Set CPHA bit according to USART_CPHA value */
- /* Set LBCL bit according to USART_LastBit value */
- tmpreg |= (uint32_t)(USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
- USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit);
- /* Write to USART CR2 */
- USARTx->CR2 = tmpreg;
-}
-
-/**
- * @brief Fills each USART_ClockInitStruct member with its default value.
- * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
- * structure which will be initialized.
- * @retval None
- */
-void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
-{
- /* USART_ClockInitStruct members default value */
- USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
- USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
- USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
- USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
-}
-
-/**
- * @brief Enables or disables the specified USART peripheral.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USARTx peripheral.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected USART by setting the UE bit in the CR1 register */
- USARTx->CR1 |= USART_CR1_UE;
- }
- else
- {
- /* Disable the selected USART by clearing the UE bit in the CR1 register */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
- }
-}
-
-/**
- * @brief Enables or disables the USART's transmitter or receiver.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_Direction: specifies the USART direction.
- * This parameter can be any combination of the following values:
- * @arg USART_Mode_Tx: USART Transmitter
- * @arg USART_Mode_Rx: USART Receiver
- * @param NewState: new state of the USART transfer direction.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_MODE(USART_DirectionMode));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the USART's transfer interface by setting the TE and/or RE bits
- in the USART CR1 register */
- USARTx->CR1 |= USART_DirectionMode;
- }
- else
- {
- /* Disable the USART's transfer interface by clearing the TE and/or RE bits
- in the USART CR3 register */
- USARTx->CR1 &= (uint32_t)~USART_DirectionMode;
- }
-}
-
-/**
- * @brief Enables or disables the USART's 8x oversampling mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART 8x oversampling mode.
- * This parameter can be: ENABLE or DISABLE.
- * @note
- * This function has to be called before calling USART_Init()
- * function in order to have correct baudrate Divider value.
- * @retval None
- */
-void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
- USARTx->CR1 |= USART_CR1_OVER8;
- }
- else
- {
- /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8);
- }
-}
-
-/**
- * @brief Enables or disables the USART's one bit sampling method.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART one bit sampling method.
- * This parameter can be: ENABLE or DISABLE.
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the one bit method by setting the ONEBIT bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_ONEBIT;
- }
- else
- {
- /* Disable the one bit method by clearing the ONEBIT bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT);
- }
-}
-
-/**
- * @brief Enables or disables the USART's most significant bit first
- * transmitted/received following the start bit.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART most significant bit first
- * transmitted/received following the start bit.
- * This parameter can be: ENABLE or DISABLE.
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the most significant bit first transmitted/received following the
- start bit by setting the MSBFIRST bit in the CR2 register */
- USARTx->CR2 |= USART_CR2_MSBFIRST;
- }
- else
- {
- /* Disable the most significant bit first transmitted/received following the
- start bit by clearing the MSBFIRST bit in the CR2 register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST);
- }
-}
-
-/**
- * @brief Enables or disables the binary data inversion.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new defined levels for the USART data.
- * This parameter can be: ENABLE or DISABLE.
- * @arg ENABLE: Logical data from the data register are send/received in negative
- * logic. (1=L, 0=H). The parity bit is also inverted.
- * @arg DISABLE: Logical data from the data register are send/received in positive
- * logic. (1=H, 0=L)
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the binary data inversion feature by setting the DATAINV bit in
- the CR2 register */
- USARTx->CR2 |= USART_CR2_DATAINV;
- }
- else
- {
- /* Disable the binary data inversion feature by clearing the DATAINV bit in
- the CR2 register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV);
- }
-}
-
-/**
- * @brief Enables or disables the Pin(s) active level inversion.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_InvPin: specifies the USART pin(s) to invert.
- * This parameter can be any combination of the following values:
- * @arg USART_InvPin_Tx: USART Tx pin active level inversion.
- * @arg USART_InvPin_Rx: USART Rx pin active level inversion.
- * @param NewState: new active level status for the USART pin(s).
- * This parameter can be: ENABLE or DISABLE.
- * - ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1).
- * - DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0).
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_INVERSTION_PIN(USART_InvPin));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the active level inversion for selected pins by setting the TXINV
- and/or RXINV bits in the USART CR2 register */
- USARTx->CR2 |= USART_InvPin;
- }
- else
- {
- /* Disable the active level inversion for selected requests by clearing the
- TXINV and/or RXINV bits in the USART CR2 register */
- USARTx->CR2 &= (uint32_t)~USART_InvPin;
- }
-}
-
-/**
- * @brief Enables or disables the swap Tx/Rx pins.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USARTx TX/RX pins pinout.
- * This parameter can be: ENABLE or DISABLE.
- * @arg ENABLE: The TX and RX pins functions are swapped.
- * @arg DISABLE: TX/RX pins are used as defined in standard pinout
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the SWAP feature by setting the SWAP bit in the CR2 register */
- USARTx->CR2 |= USART_CR2_SWAP;
- }
- else
- {
- /* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP);
- }
-}
-
-/**
- * @brief Enables or disables the receiver Time Out feature.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USARTx receiver Time Out.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the receiver time out feature by setting the RTOEN bit in the CR2
- register */
- USARTx->CR2 |= USART_CR2_RTOEN;
- }
- else
- {
- /* Disable the receiver time out feature by clearing the RTOEN bit in the CR2
- register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN);
- }
-}
-
-/**
- * @brief Sets the receiver Time Out value.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_ReceiverTimeOut: specifies the Receiver Time Out value.
- * @retval None
- */
-void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut));
-
- /* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR
- register */
- USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO);
- /* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR
- register */
- USARTx->RTOR |= USART_ReceiverTimeOut;
-}
-
-/**
- * @brief Sets the system clock prescaler.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_Prescaler: specifies the prescaler clock.
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
-
- /* Clear the USART prescaler */
- USARTx->GTPR &= USART_GTPR_GT;
- /* Set the USART prescaler */
- USARTx->GTPR |= USART_Prescaler;
-}
-
-/**
- * @}
- */
-
-
-/** @defgroup USART_Group2 STOP Mode functions
- * @brief STOP Mode functions
- *
-@verbatim
- ===============================================================================
- ##### STOP Mode functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage
- WakeUp from STOP mode.
-
- [..] The USART is able to WakeUp from Stop Mode if USART clock is set to HSI
- or LSI.
-
- [..] The WakeUp source is configured by calling USART_StopModeWakeUpSourceConfig()
- function.
-
- [..] After configuring the source of WakeUp and before entering in Stop Mode
- USART_STOPModeCmd() function should be called to allow USART WakeUp.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the specified USART peripheral in STOP Mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USARTx peripheral state in stop mode.
- * This parameter can be: ENABLE or DISABLE.
- * @note
- * This function has to be called when USART clock is set to HSI or LSE.
- * @retval None
- */
-void USART_STOPModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected USART in STOP mode by setting the UESM bit in the CR1
- register */
- USARTx->CR1 |= USART_CR1_UESM;
- }
- else
- {
- /* Disable the selected USART in STOP mode by clearing the UE bit in the CR1
- register */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UESM);
- }
-}
-
-/**
- * @brief Selects the USART WakeUp method form stop mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_WakeUp: specifies the selected USART wakeup method.
- * This parameter can be one of the following values:
- * @arg USART_WakeUpSource_AddressMatch: WUF active on address match.
- * @arg USART_WakeUpSource_StartBit: WUF active on Start bit detection.
- * @arg USART_WakeUpSource_RXNE: WUF active on RXNE.
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_StopModeWakeUpSourceConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUpSource)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_STOPMODE_WAKEUPSOURCE(USART_WakeUpSource));
-
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_WUS);
- USARTx->CR3 |= USART_WakeUpSource;
-}
-
-/**
- * @}
- */
-
-
-/** @defgroup USART_Group3 AutoBaudRate functions
- * @brief AutoBaudRate functions
- *
-@verbatim
- ===============================================================================
- ##### AutoBaudRate functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage
- the AutoBaudRate detections.
-
- [..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd ()
- The character patterns used to calculate baudrate must be chosen by calling
- USART_AutoBaudRateConfig() function. These function take as parameter :
- (#)USART_AutoBaudRate_StartBit : any character starting with a bit 1.
- (#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern.
-
- [..] At any later time, another request for AutoBaudRate detection can be performed
- using USART_RequestCmd() function.
-
- [..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate
- that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag
- indicate that this procedure is completed without success. USART_GetFlagStatus ()
- function should be used to monitor the status of these flags.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the Auto Baud Rate.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USARTx auto baud rate.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the auto baud rate feature by setting the ABREN bit in the CR2
- register */
- USARTx->CR2 |= USART_CR2_ABREN;
- }
- else
- {
- /* Disable the auto baud rate feature by clearing the ABREN bit in the CR2
- register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN);
- }
-}
-
-/**
- * @brief Selects the USART auto baud rate method.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_AutoBaudRate: specifies the selected USART auto baud rate method.
- * This parameter can be one of the following values:
- * @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement.
- * @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement.
- * @arg USART_AutoBaudRate_0x7FFrame: 0x7F frame.
- * @arg USART_AutoBaudRate_0x55Frame: 0x55 frame.
- * @note
- * This function has to be called before calling USART_Cmd() function.
- * @retval None
- */
-void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate));
-
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE);
- USARTx->CR2 |= USART_AutoBaudRate;
-}
-
-/**
- * @}
- */
-
-
-/** @defgroup USART_Group4 Data transfers functions
- * @brief Data transfers functions
- *
-@verbatim
- ===============================================================================
- ##### Data transfers functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage
- the USART data transfers.
- [..] During an USART reception, data shifts in least significant bit first
- through the RX pin. When a transmission is taking place, a write instruction to
- the USART_TDR register stores the data in the shift register.
- [..] The read access of the USART_RDR register can be done using
- the USART_ReceiveData() function and returns the RDR value.
- Whereas a write access to the USART_TDR can be done using USART_SendData()
- function and stores the written data into TDR.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Transmits single data through the USARTx peripheral.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param Data: the data to transmit.
- * @retval None
- */
-void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_DATA(Data));
-
- /* Transmit Data */
- USARTx->TDR = (Data & (uint16_t)0x01FF);
-}
-
-/**
- * @brief Returns the most recent received data by the USARTx peripheral.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @retval The received data.
- */
-uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
-
- /* Receive Data */
- return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF);
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group5 MultiProcessor Communication functions
- * @brief Multi-Processor Communication functions
- *
-@verbatim
- ===============================================================================
- ##### Multi-Processor Communication functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- multiprocessor communication.
- [..] For instance one of the USARTs can be the master, its TX output is
- connected to the RX input of the other USART. The others are slaves,
- their respective TX outputs are logically ANDed together and connected
- to the RX input of the master. USART multiprocessor communication is
- possible through the following procedure:
- (#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity,
- Mode transmitter or Mode receiver and hardware flow control values
- using the USART_Init() function.
- (#) Configures the USART address using the USART_SetAddress() function.
- (#) Configures the wake up methode (USART_WakeUp_IdleLine or
- USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only
- for the slaves.
- (#) Enable the USART using the USART_Cmd() function.
- (#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd()
- function.
- [..] The USART Slave exit from mute mode when receive the wake up condition.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Sets the address of the USART node.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_Address: Indicates the address of the USART node.
- * @retval None
- */
-void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
-
- /* Clear the USART address */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD);
- /* Set the USART address node */
- USARTx->CR2 |=((uint32_t)USART_Address << (uint32_t)0x18);
-}
-
-/**
- * @brief Enables or disables the USART's mute mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART mute mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the USART mute mode by setting the MME bit in the CR1 register */
- USARTx->CR1 |= USART_CR1_MME;
- }
- else
- {
- /* Disable the USART mute mode by clearing the MME bit in the CR1 register */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME);
- }
-}
-
-/**
- * @brief Selects the USART WakeUp method from mute mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_WakeUp: specifies the USART wakeup method.
- * This parameter can be one of the following values:
- * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
- * @arg USART_WakeUp_AddressMark: WakeUp by an address mark
- * @retval None
- */
-void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp));
-
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE);
- USARTx->CR1 |= USART_WakeUp;
-}
-
-/**
- * @brief Configure the the USART Address detection length.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_AddressLength: specifies the USART address length detection.
- * This parameter can be one of the following values:
- * @arg USART_AddressLength_4b: 4-bit address length detection
- * @arg USART_AddressLength_7b: 7-bit address length detection
- * @retval None
- */
-void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength));
-
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7);
- USARTx->CR2 |= USART_AddressLength;
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group6 LIN mode functions
- * @brief LIN mode functions
- *
-@verbatim
- ===============================================================================
- ##### LIN mode functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- LIN Mode communication.
- [..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance
- with the LIN standard.
- [..] Only this LIN Feature is supported by the USART IP:
- (+) LIN Master Synchronous Break send capability and LIN slave break
- detection capability : 13-bit break generation and 10/11 bit break
- detection.
- [..] USART LIN Master transmitter communication is possible through the
- following procedure:
- (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
- Mode transmitter or Mode receiver and hardware flow control values
- using the USART_Init() function.
- (#) Enable the LIN mode using the USART_LINCmd() function.
- (#) Enable the USART using the USART_Cmd() function.
- (#) Send the break character using USART_SendBreak() function.
- [..] USART LIN Master receiver communication is possible through the
- following procedure:
- (#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
- Mode transmitter or Mode receiver and hardware flow control values
- using the USART_Init() function.
- (#) Configures the break detection length
- using the USART_LINBreakDetectLengthConfig() function.
- (#) Enable the LIN mode using the USART_LINCmd() function.
- (#) Enable the USART using the USART_Cmd() function.
- [..]
- (@) In LIN mode, the following bits must be kept cleared:
- (+@) CLKEN in the USART_CR2 register.
- (+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Sets the USART LIN Break detection length.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_LINBreakDetectLength: specifies the LIN break detection length.
- * This parameter can be one of the following values:
- * @arg USART_LINBreakDetectLength_10b: 10-bit break detection
- * @arg USART_LINBreakDetectLength_11b: 11-bit break detection
- * @retval None
- */
-void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint32_t USART_LINBreakDetectLength)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
-
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LBDL);
- USARTx->CR2 |= USART_LINBreakDetectLength;
-}
-
-/**
- * @brief Enables or disables the USART's LIN mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART LIN mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
- USARTx->CR2 |= USART_CR2_LINEN;
- }
- else
- {
- /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
- USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LINEN);
- }
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group7 Halfduplex mode function
- * @brief Half-duplex mode function
- *
-@verbatim
- ===============================================================================
- ##### Half-duplex mode function #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- Half-duplex communication.
- [..] The USART can be configured to follow a single-wire half-duplex protocol
- where the TX and RX lines are internally connected.
- [..] USART Half duplex communication is possible through the following procedure:
- (#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter
- or Mode receiver and hardware flow control values using the USART_Init()
- function.
- (#) Configures the USART address using the USART_SetAddress() function.
- (#) Enable the half duplex mode using USART_HalfDuplexCmd() function.
- (#) Enable the USART using the USART_Cmd() function.
- [..]
- (@) The RX pin is no longer used.
- (@) In Half-duplex mode the following bits must be kept cleared:
- (+@) LINEN and CLKEN bits in the USART_CR2 register.
- (+@) SCEN and IREN bits in the USART_CR3 register.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the USART's Half Duplex communication.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the USART Communication.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_HDSEL;
- }
- else
- {
- /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL);
- }
-}
-
-/**
- * @}
- */
-
-
-/** @defgroup USART_Group8 Smartcard mode functions
- * @brief Smartcard mode functions
- *
-@verbatim
- ===============================================================================
- ##### Smartcard mode functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- Smartcard communication.
- [..] The Smartcard interface is designed to support asynchronous protocol
- Smartcards as defined in the ISO 7816-3 standard. The USART can provide
- a clock to the smartcard through the SCLK output. In smartcard mode,
- SCLK is not associated to the communication but is simply derived from
- the internal peripheral input clock through a 5-bit prescaler.
- [..] Smartcard communication is possible through the following procedure:
- (#) Configures the Smartcard Prsecaler using the USART_SetPrescaler()
- function.
- (#) Configures the Smartcard Guard Time using the USART_SetGuardTime()
- function.
- (#) Program the USART clock using the USART_ClockInit() function as following:
- (++) USART Clock enabled.
- (++) USART CPOL Low.
- (++) USART CPHA on first edge.
- (++) USART Last Bit Clock Enabled.
- (#) Program the Smartcard interface using the USART_Init() function as
- following:
- (++) Word Length = 9 Bits.
- (++) 1.5 Stop Bit.
- (++) Even parity.
- (++) BaudRate = 12096 baud.
- (++) Hardware flow control disabled (RTS and CTS signals).
- (++) Tx and Rx enabled
- (#) Optionally you can enable the parity error interrupt using
- the USART_ITConfig() function.
- (#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function.
- (#) Enable the Smartcard interface using the USART_SmartCardCmd() function.
- (#) Enable the USART using the USART_Cmd() function.
- [..]
- Please refer to the ISO 7816-3 specification for more details.
- [..]
- (@) It is also possible to choose 0.5 stop bit for receiving but it is
- recommended to use 1.5 stop bits for both transmitting and receiving
- to avoid switching between the two configurations.
- (@) In smartcard mode, the following bits must be kept cleared:
- (+@) LINEN bit in the USART_CR2 register.
- (+@) HDSEL and IREN bits in the USART_CR3 register.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Sets the specified USART guard time.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param USART_GuardTime: specifies the guard time.
- * @retval None
- */
-void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
-{
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
-
- /* Clear the USART Guard time */
- USARTx->GTPR &= USART_GTPR_PSC;
- /* Set the USART guard time */
- USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
-}
-
-/**
- * @brief Enables or disables the USART's Smart Card mode.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param NewState: new state of the Smart Card mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- if (NewState != DISABLE)
- {
- /* Enable the SC mode by setting the SCEN bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_SCEN;
- }
- else
- {
- /* Disable the SC mode by clearing the SCEN bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCEN);
- }
-}
-
-/**
- * @brief Enables or disables NACK transmission.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param NewState: new state of the NACK transmission.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- if (NewState != DISABLE)
- {
- /* Enable the NACK transmission by setting the NACK bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_NACK;
- }
- else
- {
- /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_NACK);
- }
-}
-
-/**
- * @brief Sets the Smart Card number of retries in transmit and receive.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param USART_AutoCount: specifies the Smart Card auto retry count.
- * @retval None
- */
-void USART_SetAutoRetryCount(USART_TypeDef* USARTx, uint8_t USART_AutoCount)
-{
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
- assert_param(IS_USART_AUTO_RETRY_COUNTER(USART_AutoCount));
- /* Clear the USART auto retry count */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCARCNT);
- /* Set the USART auto retry count*/
- USARTx->CR3 |= (uint32_t)((uint32_t)USART_AutoCount << 0x11);
-}
-
-/**
- * @brief Sets the Smart Card Block length.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3.
- * @param USART_BlockLength: specifies the Smart Card block length.
- * @retval None
- */
-void USART_SetBlockLength(USART_TypeDef* USARTx, uint8_t USART_BlockLength)
-{
- /* Check the parameters */
- assert_param(IS_USART_123_PERIPH(USARTx));
-
- /* Clear the Smart card block length */
- USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_BLEN);
- /* Set the Smart Card block length */
- USARTx->RTOR |= (uint32_t)((uint32_t)USART_BlockLength << 0x18);
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group9 IrDA mode functions
- * @brief IrDA mode functions
- *
-@verbatim
- ===============================================================================
- ##### IrDA mode functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- IrDA communication.
- [..] IrDA is a half duplex communication protocol. If the Transmitter is busy,
- any data on the IrDA receive line will be ignored by the IrDA decoder
- and if the Receiver is busy, data on the TX from the USART to IrDA will
- not be encoded by IrDA. While receiving data, transmission should be
- avoided as the data to be transmitted could be corrupted.
- [..] IrDA communication is possible through the following procedure:
- (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
- Transmitter/Receiver modes and hardware flow control values using
- the USART_Init() function.
- (#) Configures the IrDA pulse width by configuring the prescaler using
- the USART_SetPrescaler() function.
- (#) Configures the IrDA USART_IrDAMode_LowPower or USART_IrDAMode_Normal
- mode using the USART_IrDAConfig() function.
- (#) Enable the IrDA using the USART_IrDACmd() function.
- (#) Enable the USART using the USART_Cmd() function.
- [..]
- (@) A pulse of width less than two and greater than one PSC period(s) may or
- may not be rejected.
- (@) The receiver set up time should be managed by software. The IrDA physical
- layer specification specifies a minimum of 10 ms delay between
- transmission and reception (IrDA is a half duplex protocol).
- (@) In IrDA mode, the following bits must be kept cleared:
- (+@) LINEN, STOP and CLKEN bits in the USART_CR2 register.
- (+@) SCEN and HDSEL bits in the USART_CR3 register.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Configures the USART's IrDA interface.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_IrDAMode: specifies the IrDA mode.
- * This parameter can be one of the following values:
- * @arg USART_IrDAMode_LowPower
- * @arg USART_IrDAMode_Normal
- * @retval None
- */
-void USART_IrDAConfig(USART_TypeDef* USARTx, uint32_t USART_IrDAMode)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
-
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IRLP);
- USARTx->CR3 |= USART_IrDAMode;
-}
-
-/**
- * @brief Enables or disables the USART's IrDA interface.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the IrDA mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the IrDA mode by setting the IREN bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_IREN;
- }
- else
- {
- /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IREN);
- }
-}
-/**
- * @}
- */
-
-/** @defgroup USART_Group10 RS485 mode function
- * @brief RS485 mode function
- *
-@verbatim
- ===============================================================================
- ##### RS485 mode functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to manage the USART
- RS485 flow control.
- [..] RS485 flow control (Driver enable feature) handling is possible through
- the following procedure:
- (#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
- Transmitter/Receiver modes and hardware flow control values using
- the USART_Init() function.
- (#) Enable the Driver Enable using the USART_DECmd() function.
- (#) Configures the Driver Enable polarity using the USART_DEPolarityConfig()
- function.
- (#) Configures the Driver Enable assertion time using USART_SetDEAssertionTime()
- function and deassertion time using the USART_SetDEDeassertionTime()
- function.
- (#) Enable the USART using the USART_Cmd() function.
- [..]
- (@) The assertion and dessertion times are expressed in sample time units (1/8 or
- 1/16 bit time, depending on the oversampling rate).
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the USART's DE functionality.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param NewState: new state of the driver enable mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- if (NewState != DISABLE)
- {
- /* Enable the DE functionality by setting the DEM bit in the CR3 register */
- USARTx->CR3 |= USART_CR3_DEM;
- }
- else
- {
- /* Disable the DE functionality by clearing the DEM bit in the CR3 register */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM);
- }
-}
-
-/**
- * @brief Configures the USART's DE polarity
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_DEPolarity: specifies the DE polarity.
- * This parameter can be one of the following values:
- * @arg USART_DEPolarity_Low
- * @arg USART_DEPolarity_High
- * @retval None
- */
-void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_DE_POLARITY(USART_DEPolarity));
-
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP);
- USARTx->CR3 |= USART_DEPolarity;
-}
-
-/**
- * @brief Sets the specified RS485 DE assertion time
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_AssertionTime: specifies the time between the activation of the DE
- * signal and the beginning of the start bit
- * @retval None
- */
-void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime));
-
- /* Clear the DE assertion time */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT);
- /* Set the new value for the DE assertion time */
- USARTx->CR1 |=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15);
-}
-
-/**
- * @brief Sets the specified RS485 DE deassertion time
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_DeassertionTime: specifies the time between the middle of the last
- * stop bit in a transmitted message and the de-activation of the DE signal
- * @retval None
- */
-void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime));
-
- /* Clear the DE deassertion time */
- USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT);
- /* Set the new value for the DE deassertion time */
- USARTx->CR1 |=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10);
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group11 DMA transfers management functions
- * @brief DMA transfers management functions
- *
-@verbatim
- ===============================================================================
- ##### DMA transfers management functions #####
- ===============================================================================
- [..] This section provides two functions that can be used only in DMA mode.
- [..] In DMA Mode, the USART communication can be managed by 2 DMA Channel
- requests:
- (#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
- (#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
- [..] In this Mode it is advised to use the following function:
- (+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq,
- FunctionalState NewState).
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the USART's DMA interface.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4.
- * @param USART_DMAReq: specifies the DMA request.
- * This parameter can be any combination of the following values:
- * @arg USART_DMAReq_Tx: USART DMA transmit request
- * @arg USART_DMAReq_Rx: USART DMA receive request
- * @param NewState: new state of the DMA Request sources.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_1234_PERIPH(USARTx));
- assert_param(IS_USART_DMAREQ(USART_DMAReq));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the DMA transfer for selected requests by setting the DMAT and/or
- DMAR bits in the USART CR3 register */
- USARTx->CR3 |= USART_DMAReq;
- }
- else
- {
- /* Disable the DMA transfer for selected requests by clearing the DMAT and/or
- DMAR bits in the USART CR3 register */
- USARTx->CR3 &= (uint32_t)~USART_DMAReq;
- }
-}
-
-/**
- * @brief Enables or disables the USART's DMA interface when reception error occurs.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4.
- * @param USART_DMAOnError: specifies the DMA status in case of reception error.
- * This parameter can be any combination of the following values:
- * @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA
- * reception error is asserted.
- * @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA
- * reception error is asserted.
- * @retval None
- */
-void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError)
-{
- /* Check the parameters */
- assert_param(IS_USART_1234_PERIPH(USARTx));
- assert_param(IS_USART_DMAONERROR(USART_DMAOnError));
-
- /* Clear the DMA Reception error detection bit */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE);
- /* Set the new value for the DMA Reception error detection bit */
- USARTx->CR3 |= USART_DMAOnError;
-}
-
-/**
- * @}
- */
-
-/** @defgroup USART_Group12 Interrupts and flags management functions
- * @brief Interrupts and flags management functions
- *
-@verbatim
- ===============================================================================
- ##### Interrupts and flags management functions #####
- ===============================================================================
- [..] This subsection provides a set of functions allowing to configure the
- USART Interrupts sources, Requests and check or clear the flags or pending bits status.
- The user should identify which mode will be used in his application to
- manage the communication: Polling mode, Interrupt mode.
-
- *** Polling Mode ***
- ====================
- [..] In Polling Mode, the SPI communication can be managed by these flags:
- (#) USART_FLAG_REACK: to indicate the status of the Receive Enable
- acknowledge flag
- (#) USART_FLAG_TEACK: to indicate the status of the Transmit Enable
- acknowledge flag.
- (#) USART_FLAG_WUF: to indicate the status of the Wake up flag.
- (#) USART_FLAG_RWU: to indicate the status of the Receive Wake up flag.
- (#) USART_FLAG_SBK: to indicate the status of the Send Break flag.
- (#) USART_FLAG_CMF: to indicate the status of the Character match flag.
- (#) USART_FLAG_BUSY: to indicate the status of the Busy flag.
- (#) USART_FLAG_ABRF: to indicate the status of the Auto baud rate flag.
- (#) USART_FLAG_ABRE: to indicate the status of the Auto baud rate error flag.
- (#) USART_FLAG_EOBF: to indicate the status of the End of block flag.
- (#) USART_FLAG_RTOF: to indicate the status of the Receive time out flag.
- (#) USART_FLAG_nCTSS: to indicate the status of the Inverted nCTS input
- bit status.
- (#) USART_FLAG_TXE: to indicate the status of the transmit buffer register.
- (#) USART_FLAG_RXNE: to indicate the status of the receive buffer register.
- (#) USART_FLAG_TC: to indicate the status of the transmit operation.
- (#) USART_FLAG_IDLE: to indicate the status of the Idle Line.
- (#) USART_FLAG_CTS: to indicate the status of the nCTS input.
- (#) USART_FLAG_LBD: to indicate the status of the LIN break detection.
- (#) USART_FLAG_NE: to indicate if a noise error occur.
- (#) USART_FLAG_FE: to indicate if a frame error occur.
- (#) USART_FLAG_PE: to indicate if a parity error occur.
- (#) USART_FLAG_ORE: to indicate if an Overrun error occur.
- [..] In this Mode it is advised to use the following functions:
- (+) FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG).
- (+) void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG).
-
- *** Interrupt Mode ***
- ======================
- [..] In Interrupt Mode, the USART communication can be managed by 8 interrupt
- sources and 10 pending bits:
- (+) Pending Bits:
- (##) USART_IT_WU: to indicate the status of the Wake up interrupt.
- (##) USART_IT_CM: to indicate the status of Character match interrupt.
- (##) USART_IT_EOB: to indicate the status of End of block interrupt.
- (##) USART_IT_RTO: to indicate the status of Receive time out interrupt.
- (##) USART_IT_CTS: to indicate the status of CTS change interrupt.
- (##) USART_IT_LBD: to indicate the status of LIN Break detection interrupt.
- (##) USART_IT_TC: to indicate the status of Transmission complete interrupt.
- (##) USART_IT_IDLE: to indicate the status of IDLE line detected interrupt.
- (##) USART_IT_ORE: to indicate the status of OverRun Error interrupt.
- (##) USART_IT_NE: to indicate the status of Noise Error interrupt.
- (##) USART_IT_FE: to indicate the status of Framing Error interrupt.
- (##) USART_IT_PE: to indicate the status of Parity Error interrupt.
-
- (+) Interrupt Source:
- (##) USART_IT_WU: specifies the interrupt source for Wake up interrupt.
- (##) USART_IT_CM: specifies the interrupt source for Character match
- interrupt.
- (##) USART_IT_EOB: specifies the interrupt source for End of block
- interrupt.
- (##) USART_IT_RTO: specifies the interrupt source for Receive time-out
- interrupt.
- (##) USART_IT_CTS: specifies the interrupt source for CTS change interrupt.
- (##) USART_IT_LBD: specifies the interrupt source for LIN Break
- detection interrupt.
- (##) USART_IT_TXE: specifies the interrupt source for Tansmit Data
- Register empty interrupt.
- (##) USART_IT_TC: specifies the interrupt source for Transmission
- complete interrupt.
- (##) USART_IT_RXNE: specifies the interrupt source for Receive Data
- register not empty interrupt.
- (##) USART_IT_IDLE: specifies the interrupt source for Idle line
- detection interrupt.
- (##) USART_IT_PE: specifies the interrupt source for Parity Error interrupt.
- (##) USART_IT_ERR: specifies the interrupt source for Error interrupt
- (Frame error, noise error, overrun error)
- -@@- Some parameters are coded in order to use them as interrupt
- source or as pending bits.
- [..] In this Mode it is advised to use the following functions:
- (+) void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState).
- (+) ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT).
- (+) void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT).
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the specified USART interrupts.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
- * This parameter can be one of the following values:
- * @arg USART_IT_WU: Wake up interrupt.
- * @arg USART_IT_CM: Character match interrupt.
- * @arg USART_IT_EOB: End of block interrupt.
- * @arg USART_IT_RTO: Receive time out interrupt.
- * @arg USART_IT_CTS: CTS change interrupt.
- * @arg USART_IT_LBD: LIN Break detection interrupt.
- * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
- * @arg USART_IT_TC: Transmission complete interrupt.
- * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
- * @arg USART_IT_IDLE: Idle line detection interrupt.
- * @arg USART_IT_PE: Parity Error interrupt.
- * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
- * @param NewState: new state of the specified USARTx interrupts.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState)
-{
- uint32_t usartreg = 0, itpos = 0, itmask = 0;
- uint32_t usartxbase = 0;
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_CONFIG_IT(USART_IT));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- usartxbase = (uint32_t)USARTx;
-
- /* Get the USART register index */
- usartreg = (((uint16_t)USART_IT) >> 0x08);
-
- /* Get the interrupt position */
- itpos = USART_IT & IT_MASK;
- itmask = (((uint32_t)0x01) << itpos);
-
- if (usartreg == 0x02) /* The IT is in CR2 register */
- {
- usartxbase += 0x04;
- }
- else if (usartreg == 0x03) /* The IT is in CR3 register */
- {
- usartxbase += 0x08;
- }
- else /* The IT is in CR1 register */
- {
- }
- if (NewState != DISABLE)
- {
- *(__IO uint32_t*)usartxbase |= itmask;
- }
- else
- {
- *(__IO uint32_t*)usartxbase &= ~itmask;
- }
-}
-
-/**
- * @brief Enables the specified USART's Request.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_Request: specifies the USART request.
- * This parameter can be any combination of the following values:
- * @arg USART_Request_TXFRQ: Transmit data flush ReQuest
- * @arg USART_Request_RXFRQ: Receive data flush ReQuest
- * @arg USART_Request_MMRQ: Mute Mode ReQuest
- * @arg USART_Request_SBKRQ: Send Break ReQuest
- * @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest
- * @param NewState: new state of the DMA interface when reception error occurs.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_REQUEST(USART_Request));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the USART ReQuest by setting the dedicated request bit in the RQR
- register.*/
- USARTx->RQR |= USART_Request;
- }
- else
- {
- /* Disable the USART ReQuest by clearing the dedicated request bit in the RQR
- register.*/
- USARTx->RQR &= (uint32_t)~USART_Request;
- }
-}
-
-/**
- * @brief Enables or disables the USART's Overrun detection.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_OVRDetection: specifies the OVR detection status in case of OVR error.
- * This parameter can be any combination of the following values:
- * @arg USART_OVRDetection_Enable: OVR error detection enabled when the USART OVR error
- * is asserted.
- * @arg USART_OVRDetection_Disable: OVR error detection disabled when the USART OVR error
- * is asserted.
- * @retval None
- */
-void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_OVRDETECTION(USART_OVRDetection));
-
- /* Clear the OVR detection bit */
- USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS);
- /* Set the new value for the OVR detection bit */
- USARTx->CR3 |= USART_OVRDetection;
-}
-
-/**
- * @brief Checks whether the specified USART flag is set or not.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_FLAG: specifies the flag to check.
- * This parameter can be one of the following values:
- * @arg USART_FLAG_REACK: Receive Enable acknowledge flag.
- * @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag.
- * @arg USART_FLAG_WUF: Wake up flag.
- * @arg USART_FLAG_RWU: Receive Wake up flag.
- * @arg USART_FLAG_SBK: Send Break flag.
- * @arg USART_FLAG_CMF: Character match flag.
- * @arg USART_FLAG_BUSY: Busy flag.
- * @arg USART_FLAG_ABRF: Auto baud rate flag.
- * @arg USART_FLAG_ABRE: Auto baud rate error flag.
- * @arg USART_FLAG_EOBF: End of block flag.
- * @arg USART_FLAG_RTOF: Receive time out flag.
- * @arg USART_FLAG_nCTSS: Inverted nCTS input bit status.
- * @arg USART_FLAG_CTS: CTS Change flag.
- * @arg USART_FLAG_LBD: LIN Break detection flag.
- * @arg USART_FLAG_TXE: Transmit data register empty flag.
- * @arg USART_FLAG_TC: Transmission Complete flag.
- * @arg USART_FLAG_RXNE: Receive data register not empty flag.
- * @arg USART_FLAG_IDLE: Idle Line detection flag.
- * @arg USART_FLAG_ORE: OverRun Error flag.
- * @arg USART_FLAG_NE: Noise Error flag.
- * @arg USART_FLAG_FE: Framing Error flag.
- * @arg USART_FLAG_PE: Parity Error flag.
- * @retval The new state of USART_FLAG (SET or RESET).
- */
-FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG)
-{
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_FLAG(USART_FLAG));
-
- if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- return bitstatus;
-}
-
-/**
- * @brief Clears the USARTx's pending flags.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_FLAG: specifies the flag to clear.
- * This parameter can be any combination of the following values:
- * @arg USART_FLAG_WUF: Wake up flag.
- * @arg USART_FLAG_CMF: Character match flag.
- * @arg USART_FLAG_EOBF: End of block flag.
- * @arg USART_FLAG_RTOF: Receive time out flag.
- * @arg USART_FLAG_CTS: CTS Change flag.
- * @arg USART_FLAG_LBD: LIN Break detection flag.
- * @arg USART_FLAG_TC: Transmission Complete flag.
- * @arg USART_FLAG_IDLE: IDLE line detected flag.
- * @arg USART_FLAG_ORE: OverRun Error flag.
- * @arg USART_FLAG_NE: Noise Error flag.
- * @arg USART_FLAG_FE: Framing Error flag.
- * @arg USART_FLAG_PE: Parity Errorflag.
- *
- * @note
- * - RXNE pending bit is cleared by a read to the USART_RDR register
- * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
- * (USART_RequestCmd()).
- * - TC flag can be also cleared by software sequence: a read operation to
- * USART_SR register (USART_GetFlagStatus()) followed by a write operation
- * to USART_TDR register (USART_SendData()).
- * - TXE flag is cleared by a write to the USART_TDR register
- * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
- * (USART_RequestCmd()).
- * - SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR
- * (USART_RequestCmd()).
- * @retval None
- */
-void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG)
-{
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
-
- USARTx->ICR = USART_FLAG;
-}
-
-/**
- * @brief Checks whether the specified USART interrupt has occurred or not.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_IT: specifies the USART interrupt source to check.
- * This parameter can be one of the following values:
- * @arg USART_IT_WU: Wake up interrupt.
- * @arg USART_IT_CM: Character match interrupt.
- * @arg USART_IT_EOB: End of block interrupt.
- * @arg USART_IT_RTO: Receive time out interrupt.
- * @arg USART_IT_CTS: CTS change interrupt.
- * @arg USART_IT_LBD: LIN Break detection interrupt.
- * @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
- * @arg USART_IT_TC: Transmission complete interrupt.
- * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
- * @arg USART_IT_IDLE: Idle line detection interrupt.
- * @arg USART_IT_ORE: OverRun Error interrupt.
- * @arg USART_IT_NE: Noise Error interrupt.
- * @arg USART_IT_FE: Framing Error interrupt.
- * @arg USART_IT_PE: Parity Error interrupt.
- * @retval The new state of USART_IT (SET or RESET).
- */
-ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT)
-{
- uint32_t bitpos = 0, itmask = 0, usartreg = 0;
- ITStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_GET_IT(USART_IT));
-
- /* Get the USART register index */
- usartreg = (((uint16_t)USART_IT) >> 0x08);
- /* Get the interrupt position */
- itmask = USART_IT & IT_MASK;
- itmask = (uint32_t)0x01 << itmask;
-
- if (usartreg == 0x01) /* The IT is in CR1 register */
- {
- itmask &= USARTx->CR1;
- }
- else if (usartreg == 0x02) /* The IT is in CR2 register */
- {
- itmask &= USARTx->CR2;
- }
- else /* The IT is in CR3 register */
- {
- itmask &= USARTx->CR3;
- }
-
- bitpos = USART_IT >> 0x10;
- bitpos = (uint32_t)0x01 << bitpos;
- bitpos &= USARTx->ISR;
- if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
-
- return bitstatus;
-}
-
-/**
- * @brief Clears the USARTx's interrupt pending bits.
- * @param USARTx: Select the USART peripheral. This parameter can be one of the
- * following values: USART1 or USART2 or USART3 or UART4 or UART5.
- * @param USART_IT: specifies the interrupt pending bit to clear.
- * This parameter can be one of the following values:
- * @arg USART_IT_WU: Wake up interrupt.
- * @arg USART_IT_CM: Character match interrupt.
- * @arg USART_IT_EOB: End of block interrupt.
- * @arg USART_IT_RTO: Receive time out interrupt.
- * @arg USART_IT_CTS: CTS change interrupt.
- * @arg USART_IT_LBD: LIN Break detection interrupt.
- * @arg USART_IT_TC: Transmission complete interrupt.
- * @arg USART_IT_IDLE: IDLE line detected interrupt.
- * @arg USART_IT_ORE: OverRun Error interrupt.
- * @arg USART_IT_NE: Noise Error interrupt.
- * @arg USART_IT_FE: Framing Error interrupt.
- * @arg USART_IT_PE: Parity Error interrupt.
- * @note
- * - RXNE pending bit is cleared by a read to the USART_RDR register
- * (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register USART_RQR
- * (USART_RequestCmd()).
- * - TC pending bit can be also cleared by software sequence: a read
- * operation to USART_SR register (USART_GetITStatus()) followed by a write
- * operation to USART_TDR register (USART_SendData()).
- * - TXE pending bit is cleared by a write to the USART_TDR register
- * (USART_SendData()) or by writing 1 to the TXFRQ in the register USART_RQR
- * (USART_RequestCmd()).
- * @retval None
- */
-void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT)
-{
- uint32_t bitpos = 0, itmask = 0;
- /* Check the parameters */
- assert_param(IS_USART_ALL_PERIPH(USARTx));
- assert_param(IS_USART_CLEAR_IT(USART_IT));
-
- bitpos = USART_IT >> 0x10;
- itmask = ((uint32_t)0x01 << (uint32_t)bitpos);
- USARTx->ICR = (uint32_t)itmask;
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
projects / qmk_firmware.git / blobdiff