Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/pwmout_api.c

Revision:

491:b97b6b70036c

Parent:

490:ac0b37ef1651

Child:

492:7aa61083666c

--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/pwmout_api.c	Fri Mar 13 10:45:07 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,193 +0,0 @@
-/* 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_2) __TIM2_CLK_ENABLE();
-#if defined(TIM3_BASE)
-    if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
-#endif
-    if (obj->pwm == PWM_21) __TIM21_CLK_ENABLE();
-    if (obj->pwm == PWM_22) __TIM22_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;
-
-    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.OCFastMode   = TIM_OCFAST_ENABLE;
-
-    switch (obj->pin) {
-        // Channels 1
-        case PA_0:
-        case PA_5:
-        case PA_6:
-        case PA_15:
-        case PB_4:
-        case PC_6:
-            channel = TIM_CHANNEL_1;
-            break;
-        // Channels 2
-        case PA_1:
-        case PA_7:
-        case PB_3:
-        case PB_5:
-        case PC_7:
-            channel = TIM_CHANNEL_2;
-            break;
-        // Channels 3
-        case PA_2:
-        case PB_0:
-        case PB_10:
-        case PC_8:
-            channel = TIM_CHANNEL_3;
-            break;
-        // Channels 4
-        case PA_3:
-        case PB_1:
-        case PB_11:
-        case PC_9:
-            channel = TIM_CHANNEL_4;
-            break;
-        default:
-            return;
-    }
-
-    HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
-    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);
-
-    TimHandle.Init.Period        = us - 1;
-    TimHandle.Init.Prescaler     = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 us 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