+++ /dev/null
-/* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2014, STMicroelectronics
- * All rights reserved.
- *
- * 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.
- *******************************************************************************
- */
-#include "pwmout_api.h"
-
-#if DEVICE_PWMOUT
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-#include "PeripheralPins.h"
-
-static TIM_HandleTypeDef TimHandle;
-
-void pwmout_init(pwmout_t* obj, PinName pin)
-{
- // Get the peripheral name from the pin and assign it to the object
- obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
-
- if (obj->pwm == (PWMName)NC) {
- error("PWM error: pinout mapping failed.");
- }
-
- // Enable TIM clock
- if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
- if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
- if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
- if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
- if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
- if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
-
- // Configure GPIO
- pinmap_pinout(pin, PinMap_PWM);
-
- obj->pin = pin;
- obj->period = 0;
- obj->pulse = 0;
-
- pwmout_period_us(obj, 20000); // 20 ms per default
-}
-
-void pwmout_free(pwmout_t* obj)
-{
- // Configure GPIO
- pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
-}
-
-void pwmout_write(pwmout_t* obj, float value)
-{
- TIM_OC_InitTypeDef sConfig;
- int channel = 0;
- int complementary_channel = 0;
-
- TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
-
- if (value < (float)0.0) {
- value = 0.0;
- } else if (value > (float)1.0) {
- value = 1.0;
- }
-
- obj->pulse = (uint32_t)((float)obj->period * value);
-
- // Configure channels
- sConfig.OCMode = TIM_OCMODE_PWM1;
- sConfig.Pulse = obj->pulse;
- sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
- sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
- sConfig.OCFastMode = TIM_OCFAST_DISABLE;
- sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
- sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
-
- switch (obj->pin) {
-
- // Channels 1
- case PA_2:
- case PA_6:
- case PA_7:
- case PA_8:
- case PA_12:
- case PB_4:
- case PB_5:
- case PB_8:
- case PB_9:
- case PB_14:
- case PC_0:
- case PC_6:
- channel = TIM_CHANNEL_1;
- break;
-
- // Channels 1N
- case PA_1:
- case PA_13:
- case PB_6:
- case PB_13:
- case PC_13:
- channel = TIM_CHANNEL_1;
- complementary_channel = 1;
- break;
-
- // Channels 2
- case PA_3:
- case PA_4:
- case PA_9:
- case PB_15:
- case PC_1:
- case PC_7:
- channel = TIM_CHANNEL_2;
- break;
-
- // Channels 3
- case PA_10:
- case PB_0:
- case PC_2:
- case PC_8:
- channel = TIM_CHANNEL_3;
- break;
-
- // Channels 3N
- case PF_0:
- channel = TIM_CHANNEL_3;
- complementary_channel = 1;
- break;
-
- // Channels 4
- case PA_11:
- case PB_1:
- case PB_7:
- case PC_3:
- case PC_9:
- channel = TIM_CHANNEL_4;
- break;
-
- default:
- return;
- }
-
- HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
-
- if (complementary_channel) {
- HAL_TIMEx_PWMN_Start(&TimHandle, channel);
- } else {
- HAL_TIM_PWM_Start(&TimHandle, channel);
- }
-}
-
-float pwmout_read(pwmout_t* obj)
-{
- float value = 0;
- if (obj->period > 0) {
- value = (float)(obj->pulse) / (float)(obj->period);
- }
- return ((value > (float)1.0) ? (float)(1.0) : (value));
-}
-
-void pwmout_period(pwmout_t* obj, float seconds)
-{
- pwmout_period_us(obj, seconds * 1000000.0f);
-}
-
-void pwmout_period_ms(pwmout_t* obj, int ms)
-{
- pwmout_period_us(obj, ms * 1000);
-}
-
-void pwmout_period_us(pwmout_t* obj, int us)
-{
- TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
-
- float dc = pwmout_read(obj);
-
- __HAL_TIM_DISABLE(&TimHandle);
-
- // Update the SystemCoreClock variable
- SystemCoreClockUpdate();
-
- TimHandle.Init.Period = us - 1;
- TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
- TimHandle.Init.ClockDivision = 0;
- TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
- HAL_TIM_PWM_Init(&TimHandle);
-
- // Set duty cycle again
- pwmout_write(obj, dc);
-
- // Save for future use
- obj->period = us;
-
- __HAL_TIM_ENABLE(&TimHandle);
-}
-
-void pwmout_pulsewidth(pwmout_t* obj, float seconds)
-{
- pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
-}
-
-void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
-{
- pwmout_pulsewidth_us(obj, ms * 1000);
-}
-
-void pwmout_pulsewidth_us(pwmout_t* obj, int us)
-{
- float value = (float)us / (float)obj->period;
- pwmout_write(obj, value);
-}
-
-#endif