stm32f10x_tim.c

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  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_DMA_BASE(TIM_DMABase));
  assert_param(IS_TIM_DMA_LENGTH(TIM_DMABurstLength));

  /* Set the DMA Base and the DMA Burst Length */
  TIMx->DCR = TIM_DMABase | TIM_DMABurstLength;
}

/*******************************************************************************
* Function Name  : TIM_DMACmd
* Description    : Enables or disables the TIMx抯 DMA Requests.
* Input          : - TIMx: where x can be  1 to 8 to select the TIM peripheral. 
*                  - TIM_DMASources: specifies the DMA Request sources.
*                    This parameter can be any combination of the following values:
*                       - TIM_DMA_Update: TIM update Interrupt source
*                       - TIM_DMA_CC1: TIM Capture Compare 1 DMA source
*                       - TIM_DMA_CC2: TIM Capture Compare 2 DMA source
*                       - TIM_DMA_CC3: TIM Capture Compare 3 DMA source
*                       - TIM_DMA_CC4: TIM Capture Compare 4 DMA source
*                       - TIM_DMA_COM: TIM Commutation DMA source
*                       - TIM_DMA_Trigger: TIM Trigger DMA source
*                  - NewState: new state of the DMA Request sources.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_DMACmd(TIM_TypeDef* TIMx, u16 TIM_DMASource, FunctionalState NewState)
{ 
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_DMA_SOURCE(TIM_DMASource));
  assert_param(IS_TIM_PERIPH_DMA(TIMx, TIM_DMASource));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Enable the DMA sources */
    TIMx->DIER |= TIM_DMASource; 
  }
  else
  {
    /* Disable the DMA sources */
    TIMx->DIER &= (u16)~TIM_DMASource;
  }
}

/*******************************************************************************
* Function Name  : TIM_InternalClockConfig
* Description    : Configures the TIMx interrnal Clock
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_InternalClockConfig(TIM_TypeDef* TIMx)
{
  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));

  /* Disable slave mode to clock the prescaler directly with the internal clock */
  TIMx->SMCR &=  SMCR_SMS_Mask;
}
/*******************************************************************************
* Function Name  : TIM_ITRxExternalClockConfig
* Description    : Configures the TIMx Internal Trigger as External Clock
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_ITRSource: Trigger source.
*                    This parameter can be one of the following values:
*                       - TIM_TS_ITR0: Internal Trigger 0
*                       - TIM_TS_ITR1: Internal Trigger 1
*                       - TIM_TS_ITR2: Internal Trigger 2
*                       - TIM_TS_ITR3: Internal Trigger 3
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ITRxExternalClockConfig(TIM_TypeDef* TIMx, u16 TIM_InputTriggerSource)
{
  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_INTERNAL_TRIGGER_SELECTION(TIM_InputTriggerSource));

  /* Select the Internal Trigger */
  TIM_SelectInputTrigger(TIMx, TIM_InputTriggerSource);

  /* Select the External clock mode1 */
  TIMx->SMCR |= TIM_SlaveMode_External1;
}
/*******************************************************************************
* Function Name  : TIM_TIxExternalClockConfig
* Description    : Configures the TIMx Trigger as External Clock
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_TIxExternalCLKSource: Trigger source.
*                    This parameter can be one of the following values:
*                       - TIM_TIxExternalCLK1Source_TI1ED: TI1 Edge Detector
*                       - TIM_TIxExternalCLK1Source_TI1: Filtered Timer Input 1
*                       - TIM_TIxExternalCLK1Source_TI2: Filtered Timer Input 2
*                  - TIM_ICPolarity: specifies the TIx Polarity.
*                    This parameter can be:
*                       - TIM_ICPolarity_Rising
*                       - TIM_ICPolarity_Falling
*                   - ICFilter : specifies the filter value.
*                     This parameter must be a value between 0x0 and 0xF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_TIxExternalClockConfig(TIM_TypeDef* TIMx, u16 TIM_TIxExternalCLKSource,
                                u16 TIM_ICPolarity, u16 ICFilter)
{
  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_TIXCLK_SOURCE(TIM_TIxExternalCLKSource));
  assert_param(IS_TIM_IC_POLARITY(TIM_ICPolarity));
  assert_param(IS_TIM_IC_FILTER(ICFilter));

  /* Configure the Timer Input Clock Source */
  if (TIM_TIxExternalCLKSource == TIM_TIxExternalCLK1Source_TI2)
  {
    TI2_Config(TIMx, TIM_ICPolarity, TIM_ICSelection_DirectTI, ICFilter);
  }
  else
  {
    TI1_Config(TIMx, TIM_ICPolarity, TIM_ICSelection_DirectTI, ICFilter);
  }

  /* Select the Trigger source */
  TIM_SelectInputTrigger(TIMx, TIM_TIxExternalCLKSource);

  /* Select the External clock mode1 */
  TIMx->SMCR |= TIM_SlaveMode_External1;
}

/*******************************************************************************
* Function Name  : TIM_ETRClockMode1Config
* Description    : Configures the External clock Mode1
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_ExtTRGPrescaler: The external Trigger Prescaler.
*                    It can be one of the following values:
*                       - TIM_ExtTRGPSC_OFF
*                       - TIM_ExtTRGPSC_DIV2
*                       - TIM_ExtTRGPSC_DIV4
*                       - TIM_ExtTRGPSC_DIV8.
*                  - TIM_ExtTRGPolarity: The external Trigger Polarity.
*                    It can be one of the following values:
*                       - TIM_ExtTRGPolarity_Inverted
*                       - TIM_ExtTRGPolarity_NonInverted
*                  - ExtTRGFilter: External Trigger Filter.
*                    This parameter must be a value between 0x00 and 0x0F
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ETRClockMode1Config(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, u16 TIM_ExtTRGPolarity,
                             u16 ExtTRGFilter)
{
  u16 tmpsmcr = 0;

  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler));
  assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity));
  assert_param(IS_TIM_EXT_FILTER(ExtTRGFilter));

  /* Configure the ETR Clock source */
  TIM_ETRConfig(TIMx, TIM_ExtTRGPrescaler, TIM_ExtTRGPolarity, ExtTRGFilter);
  
  /* Get the TIMx SMCR register value */
  tmpsmcr = TIMx->SMCR;

  /* Reset the SMS Bits */
  tmpsmcr &= SMCR_SMS_Mask;
  /* Select the External clock mode1 */
  tmpsmcr |= TIM_SlaveMode_External1;

  /* Select the Trigger selection : ETRF */
  tmpsmcr &= SMCR_TS_Mask;
  tmpsmcr |= TIM_TS_ETRF;

  /* Write to TIMx SMCR */
  TIMx->SMCR = tmpsmcr;
}

/*******************************************************************************
* Function Name  : TIM_ETRClockMode2Config
* Description    : Configures the External clock Mode2
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_ExtTRGPrescaler: The external Trigger Prescaler.
*                    It can be one of the following values:
*                       - TIM_ExtTRGPSC_OFF
*                       - TIM_ExtTRGPSC_DIV2
*                       - TIM_ExtTRGPSC_DIV4
*                       - TIM_ExtTRGPSC_DIV8
*                  - TIM_ExtTRGPolarity: The external Trigger Polarity.
*                    It can be one of the following values:
*                       - TIM_ExtTRGPolarity_Inverted
*                       - TIM_ExtTRGPolarity_NonInverted
*                  - ExtTRGFilter: External Trigger Filter.
*                    This parameter must be a value between 0x00 and 0x0F
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ETRClockMode2Config(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, 
                             u16 TIM_ExtTRGPolarity, u16 ExtTRGFilter)
{
  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler));
  assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity));
  assert_param(IS_TIM_EXT_FILTER(ExtTRGFilter));

  /* Configure the ETR Clock source */
  TIM_ETRConfig(TIMx, TIM_ExtTRGPrescaler, TIM_ExtTRGPolarity, ExtTRGFilter);

  /* Enable the External clock mode2 */
  TIMx->SMCR |= SMCR_ECE_Set;
}

/*******************************************************************************
* Function Name  : TIM_ETRConfig
* Description    : Configures the TIMx External Trigger (ETR).
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_ExtTRGPrescaler: The external Trigger Prescaler.
*                    This parameter can be one of the following values:
*                       - TIM_ExtTRGPSC_OFF
*                       - TIM_ExtTRGPSC_DIV2
*                       - TIM_ExtTRGPSC_DIV4
*                       - TIM_ExtTRGPSC_DIV8
*                  - TIM_ExtTRGPolarity: The external Trigger Polarity.
*                    This parameter can be one of the following values:
*                       - TIM_ExtTRGPolarity_Inverted
*                       - TIM_ExtTRGPolarity_NonInverted
*                  - ExtTRGFilter: External Trigger Filter.
*                    This parameter must be a value between 0x00 and 0x0F.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ETRConfig(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, u16 TIM_ExtTRGPolarity,
                   u16 ExtTRGFilter)
{
  u16 tmpsmcr = 0;

  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler));
  assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity));
  assert_param(IS_TIM_EXT_FILTER(ExtTRGFilter));

  tmpsmcr = TIMx->SMCR;

  /* Reset the ETR Bits */
  tmpsmcr &= SMCR_ETR_Mask;

  /* Set the Prescaler, the Filter value and the Polarity */
  tmpsmcr |= TIM_ExtTRGPrescaler | TIM_ExtTRGPolarity | (u16)(ExtTRGFilter << 8);

  /* Write to TIMx SMCR */
  TIMx->SMCR = tmpsmcr;
}

/*******************************************************************************
* Function Name  : TIM_PrescalerConfig
* Description    : Configures the TIMx Prescaler.
* Input          : - TIMx: where x can be  1 to 8 to select the TIM peripheral.
*                  - Prescaler: specifies the Prescaler Register value
*                  - TIM_PSCReloadMode: specifies the TIM Prescaler Reload mode
*                    This parameter can be one of the following values:
*                       - TIM_PSCReloadMode_Update: The Prescaler is loaded at
*                         the update event.
*                       - TIM_PSCReloadMode_Immediate: The Prescaler is loaded
*                         immediatly.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_PrescalerConfig(TIM_TypeDef* TIMx, u16 Prescaler, u16 TIM_PSCReloadMode)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_PRESCALER_RELOAD(TIM_PSCReloadMode));

  /* Set the Prescaler value */
  TIMx->PSC = Prescaler;

  /* Set or reset the UG Bit */
  TIMx->EGR = TIM_PSCReloadMode;
}

/*******************************************************************************
* Function Name  : TIM_CounterModeConfig
* Description    : Specifies the TIMx Counter Mode to be used.
* Input          : - TIMx: where x can be  1, 2, 3, 4, 5 or 8 to select the TIM 
*                    peripheral.
*                  - TIM_CounterMode: specifies the Counter Mode to be used
*                    This parameter can be one of the following values:
*                       - TIM_CounterMode_Up: TIM Up Counting Mode
*                       - TIM_CounterMode_Down: TIM Down Counting Mode
*                       - TIM_CounterMode_CenterAligned1: TIM Center Aligned Mode1
*                       - TIM_CounterMode_CenterAligned2: TIM Center Aligned Mode2
*                       - TIM_CounterMode_CenterAligned3: TIM Center Aligned Mode3
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_CounterModeConfig(TIM_TypeDef* TIMx, u16 TIM_CounterMode)
{
  u16 tmpcr1 = 0;

  /* Check the parameters */
  assert_param(IS_TIM_123458_PERIPH(TIMx));
  assert_param(IS_TIM_COUNTER_MODE(TIM_CounterMode));

  tmpcr1 = TIMx->CR1;

  /* Reset the CMS and DIR Bits */
  tmpcr1 &= CR1_CounterMode_Mask;

  /* Set the Counter Mode */
  tmpcr1 |= TIM_CounterMode;