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betaflight/src/main/drivers/timer_stm32f30x.c

88 lines
3.2 KiB
C

/*
modified version of StdPeriph function is located here.
TODO - what license does apply here?
original file was lincesed under MCD-ST Liberty SW License Agreement V2
http://www.st.com/software_license_agreement_liberty_v2
*/
#include "stm32f30x.h"
#include "rcc.h"
#include "timer.h"
const timerDef_t timerDefinitions[HARDWARE_TIMER_DEFINITION_COUNT] = {
{ .TIMx = TIM1, .rcc = RCC_APB2(TIM1) },
{ .TIMx = TIM2, .rcc = RCC_APB1(TIM2) },
{ .TIMx = TIM3, .rcc = RCC_APB1(TIM3) },
{ .TIMx = TIM4, .rcc = RCC_APB1(TIM4) },
{ .TIMx = TIM6, .rcc = RCC_APB1(TIM6) },
{ .TIMx = TIM7, .rcc = RCC_APB1(TIM7) },
{ .TIMx = TIM8, .rcc = RCC_APB2(TIM8) },
{ .TIMx = TIM15, .rcc = RCC_APB2(TIM15) },
{ .TIMx = TIM16, .rcc = RCC_APB2(TIM16) },
{ .TIMx = TIM17, .rcc = RCC_APB2(TIM17) },
};
/**
* @brief Selects the TIM Output Compare Mode.
* @note This function does NOT disable the selected channel before changing the Output
* Compare Mode. If needed, user has to enable this channel using
* TIM_CCxCmd() and TIM_CCxNCmd() functions.
* @param TIMx: where x can be 1, 2, 3, 4, 8, 15, 16 or 17 to select the TIM peripheral.
* @param TIM_Channel: specifies the TIM Channel
* This parameter can be one of the following values:
* @arg TIM_Channel_1: TIM Channel 1
* @arg TIM_Channel_2: TIM Channel 2
* @arg TIM_Channel_3: TIM Channel 3
* @arg TIM_Channel_4: TIM Channel 4
* @param TIM_OCMode: specifies the TIM Output Compare Mode.
* This parameter can be one of the following values:
* @arg TIM_OCMode_Timing
* @arg TIM_OCMode_Active
* @arg TIM_OCMode_Toggle
* @arg TIM_OCMode_PWM1
* @arg TIM_OCMode_PWM2
* @arg TIM_ForcedAction_Active
* @arg TIM_ForcedAction_InActive
* @arg TIM_OCMode_Retrigerrable_OPM1
* @arg TIM_OCMode_Retrigerrable_OPM2
* @arg TIM_OCMode_Combined_PWM1
* @arg TIM_OCMode_Combined_PWM2
* @arg TIM_OCMode_Asymmetric_PWM1
* @arg TIM_OCMode_Asymmetric_PWM2
* @retval None
*/
#define CCMR_OFFSET ((uint16_t)0x0018)
#define CCMR_OC13M_MASK ((uint32_t)0xFFFEFF8F)
#define CCMR_OC24M_MASK ((uint32_t)0xFEFF8FFF)
void TIM_SelectOCxM_NoDisable(TIM_TypeDef* TIMx, uint16_t TIM_Channel, uint32_t TIM_OCMode)
{
uint32_t tmp = 0;
/* Check the parameters */
assert_param(IS_TIM_LIST1_PERIPH(TIMx));
assert_param(IS_TIM_CHANNEL(TIM_Channel));
assert_param(IS_TIM_OCM(TIM_OCMode));
tmp = (uint32_t) TIMx;
tmp += CCMR_OFFSET;
if ((TIM_Channel == TIM_Channel_1) || (TIM_Channel == TIM_Channel_3)) {
tmp += (TIM_Channel>>1);
/* Reset the OCxM bits in the CCMRx register */
*(__IO uint32_t *) tmp &= CCMR_OC13M_MASK;
/* Configure the OCxM bits in the CCMRx register */
*(__IO uint32_t *) tmp |= TIM_OCMode;
} else {
tmp += (uint32_t)(TIM_Channel - (uint32_t)4)>> (uint32_t)1;
/* Reset the OCxM bits in the CCMRx register */
*(__IO uint32_t *) tmp &= CCMR_OC24M_MASK;
/* Configure the OCxM bits in the CCMRx register */
*(__IO uint32_t *) tmp |= (uint32_t)(TIM_OCMode << 8);
}
}