+++ /dev/null
-/**
- ******************************************************************************
- * @file stm32l0xx_hal_gpio.c
- * @author MCD Application Team
- * @version V1.2.0
- * @date 06-February-2015
- * @brief GPIO HAL module driver.
- * This file provides firmware functions to manage the following
- * functionalities of the General Purpose Input/Output (GPIO) peripheral:
- * + Initialization and de-initialization functions
- * + IO operation functions
- *
- @verbatim
- ==============================================================================
- ##### GPIO Peripheral features #####
- ==============================================================================
- [..]
- (+) Each port bit of the general-purpose I/O (GPIO) ports can be individually
- configured by software in several modes:
- (++) Input mode
- (++) Analog mode
- (++) Output mode
- (++) Alternate function mode
- (++) External interrupt/event lines
-
- (+) During and just after reset, the alternate functions and external interrupt
- lines are not active and the I/O ports are configured in input floating mode.
-
- (+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be
- activated or not.
-
- (+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull
- type and the IO speed can be selected depending on the VDD value.
-
- (+) The microcontroller IO pins are connected to onboard peripherals/modules through a
- multiplexer that allows only one peripheral alternate function (AF) connected
- to an IO pin at a time. In this way, there can be no conflict between peripherals
- sharing the same IO pin.
-
- (+) All ports have external interrupt/event capability. To use external interrupt
- lines, the port must be configured in input mode. All available GPIO pins are
- connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
-
- (+) The external interrupt/event controller consists of up to 28 edge detectors
- (16 lines are connected to GPIO) for generating event/interrupt requests (each
- input line can be independently configured to select the type (interrupt or event)
- and the corresponding trigger event (rising or falling or both). Each line can
- also be masked independently.
-
- ##### How to use this driver #####
- ==============================================================================
- [..]
- (#) Enable the GPIO IOPORT clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE().
-
- (#) Configure the GPIO pin(s) using HAL_GPIO_Init().
- (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
- (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef
- structure.
- (++) In case of Output or alternate function mode selection: the speed is
- configured through "Speed" member from GPIO_InitTypeDef structure.
- (++) In alternate mode is selection, the alternate function connected to the IO
- is configured through "Alternate" member from GPIO_InitTypeDef structure.
- (++) Analog mode is required when a pin is to be used as ADC channel
- or DAC output.
- (++) In case of external interrupt/event selection the "Mode" member from
- GPIO_InitTypeDef structure select the type (interrupt or event) and
- the corresponding trigger event (rising or falling or both).
-
- (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority
- mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
- HAL_NVIC_EnableIRQ().
-
- (#) HAL_GPIO_DeInit allows to set register values to their reset value. This function
- is also to be used when unconfiguring pin which was used as an external interrupt
- or in event mode. That is the only way to reset the corresponding bit in
- EXTI & SYSCFG registers.
-
- (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
-
- (#) To set/reset the level of a pin configured in output mode use
- HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
-
- (#) To lock pin configuration until next reset use HAL_GPIO_LockPin().
-
- (#) During and just after reset, the alternate functions are not
- active and the GPIO pins are configured in input floating mode (except JTAG
- pins).
-
- (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose
- (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has
- priority over the GPIO function.
-
- (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as
- general purpose PH0 and PH1, respectively, when the HSE oscillator is off.
- The HSE has priority over the GPIO function.
-
- @endverbatim
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT(c) 2015 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 "stm32l0xx_hal.h"
-
-/** @addtogroup STM32L0xx_HAL_Driver
- * @{
- */
-
-/** @addtogroup GPIO
- * @brief GPIO HAL module driver
- * @{
- */
-
-#ifdef HAL_GPIO_MODULE_ENABLED
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* Private macro -------------------------------------------------------------*/
-
-
-#define GPIO_MODE ((uint32_t)0x00000003)
-#define EXTI_MODE ((uint32_t)0x10000000)
-#define GPIO_MODE_IT ((uint32_t)0x00010000)
-#define GPIO_MODE_EVT ((uint32_t)0x00020000)
-#define RISING_EDGE ((uint32_t)0x00100000)
-#define FALLING_EDGE ((uint32_t)0x00200000)
-#define GPIO_OUTPUT_TYPE ((uint32_t)0x00000010)
-
-#define GPIO_NUMBER ((uint32_t)16)
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/** @addtogroup GPIO_Exported_Functions
- * @{
- */
-
-/** @addtogroup GPIO_Exported_Functions_Group1
- * @brief Initialization and de-initialization functions
- *
-@verbatim
- ===============================================================================
- ##### Initialization and de-initialization functions #####
- ===============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Initializes the GPIOx peripheral according to the specified parameters in the GPIO_Init.
- * @param GPIOx: where x can be (A..E and H) to select the GPIO peripheral for STM32L0XX family devices.
- * Note that GPIOE is not available on all devices.
- * @param GPIO_Init: pointer to a GPIO_InitTypeDef structure that contains
- * the configuration information for the specified GPIO peripheral.
- * @retval None
- */
-void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
-{
- uint32_t position = 0x00;
- uint32_t ioposition = 0x00;
- uint32_t iocurrent = 0x00;
- uint32_t temp = 0x00;
-
- /* Check the parameters */
- assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
- assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,(GPIO_Init->Pin)));
-
- /* Configure the port pins */
- for(position = 0; position < GPIO_NUMBER; position++)
- {
- /* Get the IO position */
- ioposition = ((uint32_t)0x01) << position;
- /* Get the current IO position */
- iocurrent = (uint32_t)(GPIO_Init->Pin) & ioposition;
-
- if(iocurrent == ioposition)
- {
- /*--------------------- GPIO Mode Configuration ------------------------*/
- /* In case of Alternate function mode selection */
- if((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
- {
- /* Check the Alternate function parameter */
- assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
- /* Check if the Alternate function is compliant with the GPIO in use */
- assert_param(IS_GPIO_AF_AVAILABLE(GPIOx,(GPIO_Init->Alternate)));
- /* Configure Alternate function mapped with the current IO */
- temp = GPIOx->AFR[position >> 3];
- temp &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
- temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & (uint32_t)0x07) * 4)) ;
- GPIOx->AFR[position >> 3] = temp;
- }
-
- /* In case of Output or Alternate function mode selection */
- if((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) ||
- (GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
- {
- /* Check the Speed parameter */
- assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
- /* Configure the IO Speed */
- temp = GPIOx->OSPEEDR;
- temp &= ~(GPIO_OSPEEDER_OSPEED0 << (position * 2));
- temp |= (GPIO_Init->Speed << (position * 2));
- GPIOx->OSPEEDR = temp;
-
- /* Configure the IO Output Type */
- temp= GPIOx->OTYPER;
- temp &= ~(GPIO_OTYPER_OT_0 << position) ;
- temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4) << position);
- GPIOx->OTYPER = temp;
- }
-
- /* Configure IO Direction mode (Input, Output, Alternate or Analog) */
- temp = GPIOx->MODER;
- temp &= ~(GPIO_MODER_MODE0 << (position * 2));
- temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2));
- GPIOx->MODER = temp;
-
- /* Activate the Pull-up or Pull down resistor for the current IO */
- temp = GPIOx->PUPDR;
- temp &= ~(GPIO_PUPDR_PUPD0 << (position * 2));
- temp |= ((GPIO_Init->Pull) << (position * 2));
- GPIOx->PUPDR = temp;
-
- /*--------------------- EXTI Mode Configuration ------------------------*/
- /* Configure the External Interrupt or event for the current IO */
- if((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE)
- {
- /* Enable SYSCFG Clock */
- __HAL_RCC_SYSCFG_CLK_ENABLE();
-
- temp = SYSCFG->EXTICR[position >> 2];
- temp &= ~(((uint32_t)0x0F) << (4 * (position & 0x03)));
- temp |= ((uint32_t)(GPIO_GET_INDEX(GPIOx)) << (4 * (position & 0x03)));
- SYSCFG->EXTICR[position >> 2] = temp;
-
- /* Clear EXTI line configuration */
- temp = EXTI->IMR;
- temp &= ~((uint32_t)iocurrent);
- if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
- {
- temp |= iocurrent;
- }
- EXTI->IMR = temp;
-
- temp = EXTI->EMR;
- temp &= ~((uint32_t)iocurrent);
- if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
- {
- temp |= iocurrent;
- }
- EXTI->EMR = temp;
-
- /* Clear Rising Falling edge configuration */
- temp = EXTI->RTSR;
- temp &= ~((uint32_t)iocurrent);
- if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
- {
- temp |= iocurrent;
- }
- EXTI->RTSR = temp;
-
- temp = EXTI->FTSR;
- temp &= ~((uint32_t)iocurrent);
- if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
- {
- temp |= iocurrent;
- }
- EXTI->FTSR = temp;
- }
- }
- }
-}
-
-/**
- * @brief De-initializes the GPIOx peripheral registers to their default reset values.
- * @param GPIOx: where x can be (A..E and H) to select the GPIO peripheral for STM32L0XX family devices.
- * Note that GPIOE is not available on all devices.
- * @param GPIO_Pin: specifies the port bit to be written.
- * This parameter can be one of GPIO_PIN_x where x can be (0..15).
- * All port bits are not necessarily available on all GPIOs.
- * @retval None
- */
-void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin)
-{
- uint32_t position = 0x00;
- uint32_t ioposition = 0x00;
- uint32_t iocurrent = 0x00;
- uint32_t tmp = 0x00;
-
- /* Check the parameters */
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,GPIO_Pin));
-
- /* Configure the port pins */
- for(position = 0; position < GPIO_NUMBER; position++)
- {
- /* Get the IO position */
- ioposition = ((uint32_t)0x01) << position;
- /* Get the current IO position */
- iocurrent = (GPIO_Pin) & ioposition;
-
- if(iocurrent == ioposition)
- {
- /*------------------------- GPIO Mode Configuration --------------------*/
- /* Configure IO Direction in Input Floting Mode */
- GPIOx->MODER &= ~(GPIO_MODER_MODE0 << (position * 2));
-
- /* Configure the default Alternate Function in current IO */
- GPIOx->AFR[position >> 3] &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
-
- /* Configure the default value for IO Speed */
- GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEED0 << (position * 2));
-
- /* Configure the default value IO Output Type */
- GPIOx->OTYPER &= ~(GPIO_OTYPER_OT_0 << position) ;
-
- /* Deactivate the Pull-up oand Pull-down resistor for the current IO */
- GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPD0 << (position * 2));
-
-
- /*------------------------- EXTI Mode Configuration --------------------*/
- /* Configure the External Interrupt or event for the current IO */
- tmp = ((uint32_t)0x0F) << (4 * (position & 0x03));
- SYSCFG->EXTICR[position >> 2] &= ~tmp;
-
- /* Clear EXTI line configuration */
- EXTI->IMR &= ~((uint32_t)iocurrent);
- EXTI->EMR &= ~((uint32_t)iocurrent);
-
- /* Clear Rising Falling edge configuration */
- EXTI->RTSR &= ~((uint32_t)iocurrent);
- EXTI->FTSR &= ~((uint32_t)iocurrent);
- }
- }
-}
-
-/**
- * @}
- */
-
-/** @addtogroup GPIO_Exported_Functions_Group2
- * @brief GPIO Read and Write
- *
-@verbatim
- ===============================================================================
- ##### IO operation functions #####
- ===============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Reads the specified input port pin.
- * @param GPIOx: where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
- * Note that GPIOE is not available on all devices.
- * @param GPIO_Pin: specifies the port bit to read.
- * This parameter can be GPIO_PIN_x where x can be (0..15).
- * All port bits are not necessarily available on all GPIOs.
- * @retval The input port pin value.
- */
-GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
-{
- GPIO_PinState bitstatus;
-
- /* Check the parameters */
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,GPIO_Pin));
-
- if((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
- {
- bitstatus = GPIO_PIN_SET;
- }
- else
- {
- bitstatus = GPIO_PIN_RESET;
- }
- return bitstatus;
-}
-
-/**
- * @brief Sets or clears the selected data port bit.
- *
- * @note This function uses GPIOx_BSRR register to allow atomic read/modify
- * accesses. In this way, there is no risk of an IRQ occurring between
- * the read and the modify access.
- *
- * @param GPIOx: where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
- * Note that GPIOE is not available on all devices.
- * @param GPIO_Pin: specifies the port bit to be written.
- * This parameter can be one of GPIO_PIN_x where x can be (0..15).
- * All port bits are not necessarily available on all GPIOs.
- * @param PinState: specifies the value to be written to the selected bit.
- * This parameter can be one of the GPIO_PinState enum values:
- * GPIO_PIN_RESET: to clear the port pin
- * GPIO_PIN_SET: to set the port pin
- * @retval None
- */
-void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
-{
- /* Check the parameters */
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,GPIO_Pin));
- assert_param(IS_GPIO_PIN_ACTION(PinState));
-
- if(PinState != GPIO_PIN_RESET)
- {
- GPIOx->BSRR = GPIO_Pin;
- }
- else
- {
- GPIOx->BRR = GPIO_Pin ;
- }
-}
-
-/**
- * @brief Toggles the specified GPIO pins.
- * @param GPIOx: Where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
- * Note that GPIOE is not available on all devices.
- * All port bits are not necessarily available on all GPIOs.
- * @param GPIO_Pin: Specifies the pins to be toggled.
- * @retval None
- */
-void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
-{
- /* Check the parameters */
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,GPIO_Pin));
-
- GPIOx->ODR ^= GPIO_Pin;
-}
-
-/**
-* @brief Locks GPIO Pins configuration registers.
-* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
-* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
-* @note The configuration of the locked GPIO pins can no longer be modified
-* until the next reset.
-* @param GPIOx: where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family.
-* Note that GPIOE is not available on all devices.
-* @param GPIO_Pin: specifies the port bit to be locked.
-* This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
-* All port bits are not necessarily available on all GPIOs.
-* @retval None
-*/
-HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
-{
- __IO uint32_t tmp = GPIO_LCKR_LCKK;
-
- /* Check the parameters */
- assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx,GPIO_Pin));
-
- /* Apply lock key write sequence */
- tmp |= GPIO_Pin;
- /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
- GPIOx->LCKR = tmp;
- /* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */
- GPIOx->LCKR = GPIO_Pin;
- /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
- GPIOx->LCKR = tmp;
- /* Read LCKK bit*/
- tmp = GPIOx->LCKR;
-
- if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
- {
- return HAL_OK;
- }
- else
- {
- return HAL_ERROR;
- }
-}
-/**
- * @brief This function handles EXTI interrupt request.
- * @param GPIO_Pin: Specifies the pins connected to the EXTI line.
- * @retval None
- */
-void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
-{
- /* EXTI line interrupt detected */
- if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
- {
- __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
- HAL_GPIO_EXTI_Callback(GPIO_Pin);
- }
-}
-
-/**
- * @brief EXTI line detection callbacks.
- * @param GPIO_Pin: Specifies the pins connected to the EXTI line.
- * @retval None
- */
-__weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
-{
- /* NOTE: This function Should not be modified, when the callback is needed,
- the HAL_GPIO_EXTI_Callback could be implemented in the user file
- */
-}
-
-/**
- * @}
- */
-
-
-/**
- * @}
- */
-
-#endif /* HAL_GPIO_MODULE_ENABLED */
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
-
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