timerDmaCache.c

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#include "timerDmaCache.h"
 
 
 
static void rccEnableAndReset(const stm32_tim_t * const timer);
 
 
 
void timerDmaCache_cache(TimerDmaCache *tdcp, const DMADriver *fromDma, const  stm32_tim_t *fromTim)
{
  memcpy(&tdcp->DMA_regs, fromDma->dmastream->stream, sizeof(tdcp->DMA_regs));
  memcpy(&tdcp->TIM_regs, fromTim, sizeof(tdcp->TIM_regs));
  tdcp->DMA_regs.CR &= ~STM32_DMA_CR_EN;
  tdcp->TIM_regs.CR1 &=  ~STM32_TIM_CR1_CEN;
}
 
void timerDmaCache_restore(const TimerDmaCache *tdcp, DMADriver *toDma, stm32_tim_t *toTim)
{
  rccEnableAndReset(toTim);
  toTim->CR1 = 0;
  memcpy((void *) &toTim->CR2, (void *) &tdcp->TIM_regs.CR2, sizeof(tdcp->TIM_regs) - 4U);
  memcpy(toDma->dmastream->stream, &tdcp->DMA_regs, sizeof(tdcp->DMA_regs));
}
 
static void rccEnableAndReset(const stm32_tim_t * const timer)
{
#ifdef TIM1
  if (timer == STM32_TIM1) {
    rccEnableTIM1(true);
    rccResetTIM1();
  }
#endif
#ifdef TIM2
  else  if (timer == STM32_TIM2) {
    rccEnableTIM2(true);
    rccResetTIM2();
  }
#endif
#ifdef TIM3
  else  if (timer == STM32_TIM3) {
    rccEnableTIM3(true);
    rccResetTIM3();
  }
#endif
#ifdef TIM4
  else  if (timer == STM32_TIM4) {
    rccEnableTIM4(true);
    rccResetTIM4();
  }
#endif
#ifdef TIM5
  else  if (timer == STM32_TIM5) {
    rccEnableTIM5(true);
    rccResetTIM5();
  }
#endif
#ifdef TIM8
  else  if (timer == STM32_TIM8) {
    rccEnableTIM8(true);
    rccResetTIM8();
  }
#endif
#ifdef TIM9
  else  if (timer == STM32_TIM9) {
    rccEnableTIM9(true);
    rccResetTIM9();
  }
#endif
#ifdef TIM10
  else  if (timer == STM32_TIM10) {
    rccEnableTIM10(true);
    rccResetTIM10();
  }
#endif
#ifdef TIM11
  else  if (timer == STM32_TIM11) {
    rccEnableTIM11(true);
    rccResetTIM11();
  }
#endif
#ifdef TIM12
  else  if (timer == STM32_TIM12) {
    rccEnableTIM12(true);
    rccResetTIM12();
  }
#endif
#ifdef TIM13
  else  if (timer == STM32_TIM13) {
    rccEnableTIM13(true);
    rccResetTIM13();
  }
#endif
#ifdef TIM14
  else  if (timer == STM32_TIM14) {
    rccEnableTIM14(true);
    rccResetTIM14();
  }
#endif
#ifdef TIM15
  else  if (timer == STM32_TIM15) {
    rccEnableTIM15(true);
    rccResetTIM15();
  }
#endif
#ifdef TIM16
  else  if (timer == STM32_TIM16) {
    rccEnableTIM16(true);
    rccResetTIM16();
  }
#endif
#ifdef TIM17
  else  if (timer == STM32_TIM17) {
    rccEnableTIM17(true);
    rccResetTIM17();
  }
#endif
#ifdef TIM18
  else  if (timer == STM32_TIM18) {
    rccEnableTIM18(true);
    rccResetTIM18();
  }
#endif
#ifdef TIM19
  else  if (timer == STM32_TIM19) {
    rccEnableTIM19(true);
    rccResetTIM19();
  }
#endif
  else {
    chSysHalt("not a valid timer");
  }
}