91x_tim.c

a set or ARM9 examples by STM

      /* Set the One pulse mode */
      TIMx->CR1 |= TIM_OPM_MASK;

      /* Set the Pulse length  */
      TIMx->OC1R = TIM_InitStruct->TIM_Pulse_Length_1;

      break;

/*************************** Input capture channel 1 **************************/

    case TIM_ICAP_CHANNEL_1:

      if (TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
      {
        TIMx->CR1 |= TIM_ICAP1_EDGE_RISING;
      }
      else
      {
        TIMx->CR1 &= TIM_ICAP1_EDGE_FALLING;
      }

      break;

/*************************** Input capture channel 2 **************************/

    case TIM_ICAP_CHANNEL_2:

      if (TIM_InitStruct->TIM_ICAP2_Edge == TIM_ICAP2_EDGE_RISING)
      {
        TIMx->CR1 |= TIM_ICAP2_EDGE_RISING;
      }
      else
      {
        TIMx->CR1 &= TIM_ICAP2_EDGE_FALLING;
      }

      break;

/************************* Input capture channel 1 & 2 ************************/

    case TIM_ICAP_CHANNEL_12:
      if (TIM_InitStruct->TIM_ICAP2_Edge == TIM_ICAP2_EDGE_RISING)
      {
        TIMx->CR1 |= TIM_ICAP2_EDGE_RISING;
      }
      else
      {
        TIMx->CR1 &= TIM_ICAP2_EDGE_FALLING;
      }

      if (TIM_InitStruct->TIM_ICAP1_Edge == TIM_ICAP1_EDGE_RISING)
      {
        TIMx->CR1 |= TIM_ICAP1_EDGE_RISING;
      }
      else
      {
        TIMx->CR1 &= TIM_ICAP1_EDGE_FALLING;
      }

      break;

    default:
      break;
  }
}

/*******************************************************************************
* Function Name  : TIM_CounterCmd
* Description    : Enables or disables TIMx Counter peripheral.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_operation: specifies the new state of the TIMx Counter.
*                  This parameter can be one of the following values:
*                       - TIM_START: Start the timer counter.
*                       - TIM_STOP : Stop the timer counter.
*                       - TIM_CLEAR: Clear the timer counter.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_CounterCmd(TIM_TypeDef *TIMx, TIM_CounterOperations TIM_operation)
{
  switch (TIM_operation)
  {
    case TIM_START:
      TIMx->CR1 |= TIM_ENABLE_MASK;
      break;

    case TIM_STOP:
      TIMx->CR1 &= TIM_DISABLE_MASK;
      break;

    case TIM_CLEAR:
      TIMx->CNTR = 0x1234;
      break;
    
    default:
      break;
  }
}

/*******************************************************************************
* Function Name  : TIM_PrescalerConfig
* Description    : This routine is used to configure the TIMx prescaler value
*                  (when using the APB clock).
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_Prescaler: specifies the prescaler value. This parameter
*                  can be a value from 0x0 to 0xFF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_PrescalerConfig(TIM_TypeDef *TIMx, u8 TIM_Prescaler)
{
  TIMx->CR2 &= 0xFF00;
  TIMx->CR2 |= TIM_Prescaler;

}
/*******************************************************************************
* Function Name  : TIM_GetPrescalerValue
* Description    : This routine is used to get the TIMx prescaler value
*                  (when using the APB clock).
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The prescaler value.
*******************************************************************************/
u8 TIM_GetPrescalerValue(TIM_TypeDef *TIMx)
{
  return TIMx->CR2 & 0x00FF;
}

/*******************************************************************************
* Function Name  : TIM_GetCounterValue
* Description    : This routine is used to get the TIMx counter value.
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The counter value.
*******************************************************************************/
u16 TIM_GetCounterValue(TIM_TypeDef *TIMx)
{
  return TIMx->CNTR;
}

/*******************************************************************************
* Function Name  : TIM_GetICAP1Value
* Description    : This routine is used to get the Input Capture 1 value.
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The Input Capture 1 value.
*******************************************************************************/
u16 TIM_GetICAP1Value(TIM_TypeDef *TIMx)
{
  return TIMx->IC1R;
}

/*******************************************************************************
* Function Name  : TIM_GetICAP2Value
* Description    : This routine is used to get the Input Capture 2 value.
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The Input Capture 2 value.
*******************************************************************************/
u16 TIM_GetICAP2Value(TIM_TypeDef *TIMx)
{
  return TIMx->IC2R;
}

/*******************************************************************************
* Function Name  : TIM_SetPulse
* Description    : This routine is used to set the pulse value.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_Channel: specifies the needed channel.
*                  This parameter can be one of the following values:
*                       - TIM_PWM_OC1_Channel: PWM/Output Compare 1 Channel
*                       - TIM_OC2_Channel    : Output Compare 2 Channel
* Input3         : TIM_Pulse: specifies the new pulse value.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_SetPulse(TIM_TypeDef *TIMx,u16 TIM_Channel ,u16 TIM_Pulse)
{
  if (TIM_Channel == TIM_PWM_OC1_Channel)
  {
    TIMx->OC1R = TIM_Pulse;
  }
  else
  {
    TIMx->OC2R = TIM_Pulse;
  }
}
/*******************************************************************************
* Function Name  : TIM_GetFlagStatus
* Description    : Checks whether the specified TIMx flag is set or not.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_Flag: specifies the flag to check.
*                  This parameter can be one of the following values:
*                       - TIM_FLAG_IC1: Input Capture Channel 1 Flag
*                       - TIM_FLAG_IC2: Input Capture Channel 2 Flag
*                       - TIM_FLAG_TO : Timer Overflow Flag 
*                       - TIM_FLAG_OC1: Output Compare Channel 1 Flag
*                       - TIM_FLAG_OC2: Output Compare Channel 2 Flag
* Output         : None
* Return         : The NewState of the TIM_Flag (SET or RESET).
*******************************************************************************/
FlagStatus TIM_GetFlagStatus(TIM_TypeDef *TIMx, u16 TIM_Flag)
{
  if((TIMx->SR & TIM_Flag) == RESET)
  {
    return RESET;
  }
  else
  {
    return SET;
  }
}

/*******************************************************************************
* Function Name  : TIM_ClearFlag
* Description    : Clears the TIM Flag passed as a parameter.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                    peripheral.
* Input2         : TIM_Flag: specifies the flag to clear.
*                  This parameter can be one of the following values:
*                       - TIM_FLAG_IC1: Input Capture Channel 1 Flag
*                       - TIM_FLAG_IC2: Input Capture Channel 2 Flag
*                       - TIM_FLAG_TO : Timer Overflow Flag
*                       - TIM_FLAG_OC1: Output Compare Channel 1 Flag
*                       - TIM_FLAG_OC2: Output Compare Channel 2 Flag
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ClearFlag(TIM_TypeDef *TIMx, u16 TIM_Flag)
{
  /* Clear TIM_Flag */
  TIMx->SR &= ~TIM_Flag;
}

/*******************************************************************************
* Function Name  : TIM_GetPWMIPulse
* Description    : This routine is used to get the Pulse value in PWMI Mode.
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The pulse value.
*******************************************************************************/
u16 TIM_GetPWMIPulse(TIM_TypeDef *TIMx)
{
  return TIMx->IC2R;
}

/*******************************************************************************
* Function Name  : TIM_GetPWMIPeriod
* Description    : This routine is used to get the Period value in PWMI Mode.
* Input          : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Output         : None
* Return         : The period value.
*******************************************************************************/
u16 TIM_GetPWMIPeriod(TIM_TypeDef *TIMx)
{
  return TIMx->IC1R;
}

/*******************************************************************************
* Function Name  : TIM_ITConfig
* Description    : Configures the Timer interrupt source.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_IT: specifies the TIM interrupt source to be enabled.
*                  This parameter can be one of the following values:
*                       - TIM_IT_IC1: Input Capture 1 Interrupt source.
*                       - TIM_IT_OC1: Output Compare 1 Interrupt source.
*                       - TIM_IT_TO : Timer Overflow Interrupt source.
*                       - TIM_IT_IC2: Input Capture 2 Interrupt source.
*                       - TIM_IT_OC2: Output Compare 2 Interrupt source.
* Input3         : TIM_Newstate: specifies the new state of the  TIMx IT.
*                  This parameter can be one of the following values:
*                       - ENABLE : Enable the needed interrupt.
*                       - DISABLE: Disable the needed interrupt.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ITConfig(TIM_TypeDef *TIMx, u16 TIM_IT, FunctionalState TIM_Newstate)
{
  if(TIM_Newstate == ENABLE)
  {
    TIMx->CR2 = (TIMx->CR2 & 0x00FF) | TIM_IT; 
  }
  else
  {
    TIMx->CR2 &= ~TIM_IT;
  }
}

/*******************************************************************************
* Function Name  : TIM_DMAConfig
* Description    : Configures the Timer DMA source.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_DMA_Souces: specifies the TIM DMA source to be selected.
*                  This parameter can be one of the following values:
*                       - TIM_DMA_IC1: Input Capture 1 DMA source.
*                       - TIM_DMA_OCA1 Output Compare 1 DMA source.
*                       - TIM_DMA_TO: Timer Overflow DMA source.
*                       - TIM_DMA_IC2: Input Capture 2 DMA source.
*                       - TIM_DMA_OC2: Output Compare 2 DMA source.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_DMAConfig(TIM_TypeDef *TIMx, u16 TIM_DMA_Sources)
{
  /* Reset the DMAS[1:0] bits */
  TIMx->CR1 &= TIM_DMA_CLEAR_MASK;
  /* Set the DMAS[1:0] bits according to TIM_DMA_Sources parameter */
  TIMx->CR1 |= TIM_DMA_Sources; 
}

/*******************************************************************************
* Function Name  : TIM_DMACmd
* Description    : Enables or disables TIMx DMA peripheral.
* Input1         : TIMx: where x can be from 0 to 3 to select the TIM
*                  peripheral.
* Input2         : TIM_Newstate: new state of the  TIMx DMA peripheral 
*                  This parameter can be one of the following values:
*                       - ENABLE : Enable the TIMx DMA.
*                       - DISABLE: Disable the TIMx DMA.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_DMACmd(TIM_TypeDef *TIMx, FunctionalState TIM_Newstate)
{
  if (TIM_Newstate == ENABLE)
  {
    TIMx->CR2 |= TIM_DMA_ENABLE;
  }
  else
  {
    TIMx->CR2 &= TIM_DMA_DISABLE;
  }
}
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/