mbed library sources
Fork of mbed-src by
Diff: targets/hal/TARGET_STM/TARGET_DISCO_L053C8/pwmout_api.c
- Revision:
- 439:c4382fcbbaed
- Parent:
- 376:cb4d9db17537
--- a/targets/hal/TARGET_STM/TARGET_DISCO_L053C8/pwmout_api.c Mon Dec 15 09:15:06 2014 +0000 +++ b/targets/hal/TARGET_STM/TARGET_DISCO_L053C8/pwmout_api.c Mon Dec 15 09:30:07 2014 +0000 @@ -34,34 +34,12 @@ #include "cmsis.h" #include "pinmap.h" #include "mbed_error.h" - -// TIM21 cannot be used because already used by the us_ticker -static const PinMap PinMap_PWM[] = { - {PA_0, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH1 - {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2 -// {PA_2, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21)}, // TIM21_CH1 -// {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3 - used by STDIO TX -// {PA_3, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21)}, // TIM21_CH2 -// {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4 - used by STDIO RX - {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2)}, // TIM2_CH1 - used also to drive the LED - {PA_6, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM22)}, // TIM22_CH1 - {PA_7, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM22)}, // TIM22_CH2 - {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2)}, // TIM2_CH1 - {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2 - {PB_4, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM22)}, // TIM22_CH1 - {PB_5, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM22)}, // TIM22_CH2 - {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3 - {PB_11, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4 -// {PB_13, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM21)}, // TIM21_CH1 -// {PB_14, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM21)}, // TIM21_CH2 - {PC_6, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM22)}, // TIM22_CH1 - {PC_7, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM22)}, // TIM22_CH2 - {NC, NC, 0} -}; +#include "PeripheralPins.h" static TIM_HandleTypeDef TimHandle; -void pwmout_init(pwmout_t* obj, PinName pin) { +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); @@ -84,12 +62,14 @@ pwmout_period_us(obj, 20000); // 20 ms per default } -void pwmout_free(pwmout_t* obj) { +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) { +void pwmout_write(pwmout_t* obj, float value) +{ TIM_OC_InitTypeDef sConfig; int channel = 0; @@ -112,22 +92,18 @@ switch (obj->pin) { // Channels 1 case PA_0: -// case PA_2: case PA_5: case PA_6: case PA_15: case PB_4: -// case PB_13: case PC_6: channel = TIM_CHANNEL_1; break; // Channels 2 case PA_1: -// case PA_3: case PA_7: case PB_3: case PB_5: -// case PB_14: case PC_7: channel = TIM_CHANNEL_2; break; @@ -149,7 +125,8 @@ HAL_TIM_PWM_Start(&TimHandle, channel); } -float pwmout_read(pwmout_t* obj) { +float pwmout_read(pwmout_t* obj) +{ float value = 0; if (obj->period > 0) { value = (float)(obj->pulse) / (float)(obj->period); @@ -157,15 +134,18 @@ return ((value > (float)1.0) ? (float)(1.0) : (value)); } -void pwmout_period(pwmout_t* obj, float seconds) { +void pwmout_period(pwmout_t* obj, float seconds) +{ pwmout_period_us(obj, seconds * 1000000.0f); } -void pwmout_period_ms(pwmout_t* obj, int ms) { +void pwmout_period_ms(pwmout_t* obj, int ms) +{ pwmout_period_us(obj, ms * 1000); } -void pwmout_period_us(pwmout_t* obj, int us) { +void pwmout_period_us(pwmout_t* obj, int us) +{ TimHandle.Instance = (TIM_TypeDef *)(obj->pwm); float dc = pwmout_read(obj); @@ -173,7 +153,7 @@ __HAL_TIM_DISABLE(&TimHandle); TimHandle.Init.Period = us - 1; - TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick + 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); @@ -187,15 +167,18 @@ __HAL_TIM_ENABLE(&TimHandle); } -void pwmout_pulsewidth(pwmout_t* obj, float seconds) { +void pwmout_pulsewidth(pwmout_t* obj, float seconds) +{ pwmout_pulsewidth_us(obj, seconds * 1000000.0f); } -void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) { +void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) +{ pwmout_pulsewidth_us(obj, ms * 1000); } -void pwmout_pulsewidth_us(pwmout_t* obj, int us) { +void pwmout_pulsewidth_us(pwmout_t* obj, int us) +{ float value = (float)us / (float)obj->period; pwmout_write(obj, value); }