Timer als Capture/Compare

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_OCInitTypeDef  TIM_OCInitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

I2C_InitTypeDef  I2C_InitStruct;

NVIC_InitTypeDef NVIC_InitStructure;

void TIM_Config(void);

int main(void)  {

  TIM_Config();

  while (1) {

/*

  if (TIM_GetFlagStatus(TIM3, TIM_FLAG_Update) != RESET) {          // (SR-UIE Bit) toggle auf ARR-Wert funktioniert

    TIM_ClearFlag(TIM3, TIM_IT_Update);

    GPIO_ToggleBits(GPIOC, GPIO_Pin_6);

    } 

*/

  if (TIM_GetFlagStatus(TIM3, TIM_FLAG_CC1) != RESET) {              // SR-CC1IF Bit ??

    TIM_ClearFlag(TIM3, TIM_FLAG_CC1);

    GPIO_ToggleBits(GPIOC, GPIO_Pin_6);

    }  

  }

}

void TIM_Config() {

/************************* GPIO-TIM Configuration ***************************/

   // clocks enable

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);            // TIM3

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);            // GPIOC

  // GPIOC Configuration: TIM3 CH1 (PC6)

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;

  GPIO_Init(GPIOC, &GPIO_InitStructure); 

/********************************** TIM *************************************/

  // Timer basic configuration

  TIM_TimeBaseStructure.TIM_Prescaler = 3;

  TIM_TimeBaseStructure.TIM_Period =0xFFFF;                        // ARR Value

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  // Output Compare

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Active;

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_Pulse = 20999;                            //CCR1 Value

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);                          // Channel1

  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable);

  // TIM enable counter

  TIM_Cmd(TIM3, ENABLE);

}