Diff: targets/TARGET_STM/TARGET_STM32F4/pwmout_api.c

Revision:

160:d5399cc887bb

Parent:

159:612c381a210f

Child:

161:2cc1468da177

--- a/targets/TARGET_STM/TARGET_STM32F4/pwmout_api.c	Tue Feb 28 17:13:35 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,302 +0,0 @@
-/* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2015, 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);
-    MBED_ASSERT(obj->pwm != (PWMName)NC);
-
-    // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
-    uint32_t function = pinmap_function(pin, PinMap_PWM);
-    MBED_ASSERT(function != (uint32_t)NC);
-    obj->channel = STM_PIN_CHANNEL(function);
-    obj->inverted = STM_PIN_INVERTED(function);
-
-    // Enable TIM clock
-#if defined(TIM1_BASE)
-    if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
-#endif
-#if defined(TIM2_BASE)
-    if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
-#endif
-#if defined(TIM3_BASE)
-    if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
-#endif
-#if defined(TIM4_BASE)
-    if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
-#endif
-#if defined(TIM5_BASE)
-    if (obj->pwm == PWM_5) __HAL_RCC_TIM5_CLK_ENABLE();
-#endif
-#if defined(TIM8_BASE)
-    if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
-#endif
-#if defined(TIM9_BASE)
-    if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
-#endif
-#if defined(TIM10_BASE)
-    if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
-#endif
-#if defined(TIM11_BASE)
-    if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
-#endif
-#if defined(TIM12_BASE)
-    if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
-#endif
-#if defined(TIM13_BASE)
-    if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
-#endif
-#if defined(TIM14_BASE)
-    if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
-#endif
-
-    // Configure GPIO
-    pinmap_pinout(pin, PinMap_PWM);
-
-    obj->pin = pin;
-    obj->period = 0;
-    obj->pulse = 0;
-    obj->prescaler = 1;
-
-    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;
-
-    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 / obj->prescaler;
-    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->channel) {
-        case 1:
-            channel = TIM_CHANNEL_1;
-            break;
-        case 2:
-            channel = TIM_CHANNEL_2;
-            break;
-        case 3:
-            channel = TIM_CHANNEL_3;
-            break;
-        case 4:
-            channel = TIM_CHANNEL_4;
-            break;
-        default:
-            return;
-    }
-
-    if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
-        error("Cannot initialize PWM\n");
-    }
-
-    if (obj->inverted) {
-        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);
-    RCC_ClkInitTypeDef RCC_ClkInitStruct;
-    uint32_t PclkFreq;
-    uint32_t APBxCLKDivider;
-    float dc = pwmout_read(obj);
-
-    __HAL_TIM_DISABLE(&TimHandle);
-
-    // Get clock configuration
-    // Note: PclkFreq contains here the Latency (not used after)
-    HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
-
-    // Get the PCLK and APBCLK divider related to the timer
-    switch (obj->pwm) {
-      
-        // APB1 clock
-#if defined(TIM2_BASE)
-        case PWM_2:
-#endif
-#if defined(TIM3_BASE)
-        case PWM_3:
-#endif
-#if defined(TIM4_BASE)
-        case PWM_4:
-#endif
-#if defined(TIM5_BASE)
-        case PWM_5:
-#endif
-#if defined(TIM12_BASE)
-        case PWM_12:
-#endif
-#if defined(TIM13_BASE)
-        case PWM_13:
-#endif
-#if defined(TIM14_BASE)
-        case PWM_14:
-#endif
-            PclkFreq = HAL_RCC_GetPCLK1Freq();
-            APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
-            break;
-        
-        // APB2 clock
-#if defined(TIM1_BASE)
-        case PWM_1:
-#endif
-#if defined(TIM8_BASE)
-        case PWM_8:
-#endif
-#if defined(TIM9_BASE)
-        case PWM_9:
-#endif
-#if defined(TIM10_BASE)
-        case PWM_10:
-#endif
-#if defined(TIM11_BASE)
-        case PWM_11:
-#endif
-            PclkFreq = HAL_RCC_GetPCLK2Freq();
-            APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
-            break;
-        default:
-            return;
-    }
-
-    /* To make it simple, we use to possible prescaler values which lead to:
-     * pwm unit = 1us, period/pulse can be from 1us to 65535us
-     * or
-     * pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
-     * Be careful that all the channels of a PWM shares the same prescaler
-     */
-    if (us >  0xFFFF) {
-        obj->prescaler = 500;
-    } else {
-        obj->prescaler = 1;
-    }
-
-    // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
-    if (APBxCLKDivider == RCC_HCLK_DIV1)
-      TimHandle.Init.Prescaler   = (uint16_t)(((PclkFreq) / 1000000) * obj->prescaler) - 1; // 1 us tick
-    else
-      TimHandle.Init.Prescaler   = (uint16_t)(((PclkFreq * 2) / 1000000) * obj->prescaler) - 1; // 1 us tick
-
-    if (TimHandle.Init.Prescaler > 0xFFFF)
-        error("PWM: out of range prescaler");
-
-    TimHandle.Init.Period        = (us - 1) / obj->prescaler;
-    if (TimHandle.Init.Period > 0xFFFF)
-        error("PWM: out of range period");
-
-    TimHandle.Init.ClockDivision = 0;
-    TimHandle.Init.CounterMode   = TIM_COUNTERMODE_UP;
-
-    if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
-        error("Cannot initialize PWM\n");
-    }
-
-    // Save for future use
-    obj->period = us;
-
-    // Set duty cycle again
-    pwmout_write(obj, dc);
-
-    __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