stm32f10x_tim.c

STM32下做的usb转RS232程序

    else if (TIM_ICInitStruct->TIM_Channel == TIM_Channel_2)
    {
      /* TI2 Configuration */
      TI2_Config(TIMx, TIM_ICInitStruct->TIM_ICPolarity,
                 TIM_ICInitStruct->TIM_ICSelection,
                 TIM_ICInitStruct->TIM_ICFilter);

      /* Set the Input Capture Prescaler value */
      TIM_SetIC2Prescaler(TIMx, TIM_ICInitStruct->TIM_ICPrescaler);
    }
    else if (TIM_ICInitStruct->TIM_Channel == TIM_Channel_3)
    {
      /* TI3 Configuration */
      TI3_Config(TIMx, TIM_ICInitStruct->TIM_ICPolarity,
                 TIM_ICInitStruct->TIM_ICSelection,
                 TIM_ICInitStruct->TIM_ICFilter);

      /* Set the Input Capture Prescaler value */
      TIM_SetIC3Prescaler(TIMx, TIM_ICInitStruct->TIM_ICPrescaler);
    }
    else /* TIM_Channel_4 */
    {
      /* TI4 Configuration */
      TI4_Config(TIMx, TIM_ICInitStruct->TIM_ICPolarity,
                 TIM_ICInitStruct->TIM_ICSelection,
                 TIM_ICInitStruct->TIM_ICFilter);

      /* Set the Input Capture Prescaler value */
      TIM_SetIC4Prescaler(TIMx, TIM_ICInitStruct->TIM_ICPrescaler);
    }
  }
  else
  {
    PWMI_Config(TIMx, TIM_ICInitStruct);
  }
}

/*******************************************************************************
* Function Name  : TIM_TimeBaseStructInit
* Description    : Fills each TIM_TimeBaseInitStruct member with its default value.
* Input          : - TIM_TimeBaseInitStruct: pointer to a TIM_TimeBaseInitTypeDef
*                    structure which will be initialized.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_TimeBaseStructInit(TIM_TimeBaseInitTypeDef* TIM_TimeBaseInitStruct)
{
  /* Set the default configuration */
  TIM_TimeBaseInitStruct->TIM_Period = TIM_Period_Reset_Mask;
  TIM_TimeBaseInitStruct->TIM_Prescaler = TIM_Prescaler_Reset_Mask;
  TIM_TimeBaseInitStruct->TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseInitStruct->TIM_CounterMode = TIM_CounterMode_Up;
}

/*******************************************************************************
* Function Name  : TIM_OCStructInit
* Description    : Fills each TIM_OCInitStruct member with its default value.
* Input          : - TIM_OCInitStruct: pointer to a TIM_OCInitTypeDef structure
*                    which will be initialized.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_OCStructInit(TIM_OCInitTypeDef* TIM_OCInitStruct)
{
  /* Set the default configuration */
  TIM_OCInitStruct->TIM_OCMode = TIM_OCMode_Timing;
  TIM_OCInitStruct->TIM_Channel = TIM_Channel_1;
  TIM_OCInitStruct->TIM_Pulse = TIM_Pulse_Reset_Mask;
  TIM_OCInitStruct->TIM_OCPolarity = TIM_OCPolarity_High;
}

/*******************************************************************************
* Function Name  : TIM_ICStructInit
* Description    : Fills each TIM_InitStruct member with its default value.
* Input          : - TIM_ICInitStruct: pointer to a TIM_ICInitTypeDef structure
*                    which will be initialized.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ICStructInit(TIM_ICInitTypeDef* TIM_ICInitStruct)
{
  /* Set the default configuration */
  TIM_ICInitStruct->TIM_ICMode = TIM_ICMode_ICAP;
  TIM_ICInitStruct->TIM_Channel = TIM_Channel_1;
  TIM_ICInitStruct->TIM_ICPolarity = TIM_ICPolarity_Rising;
  TIM_ICInitStruct->TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStruct->TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStruct->TIM_ICFilter = TIM_ICFilter_Mask;
}

/*******************************************************************************
* Function Name  : TIM_Cmd
* Description    : Enables or disables the specified TIM peripheral.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIMx peripheral.
*                  - Newstate: new state of the TIMx peripheral.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_Cmd(TIM_TypeDef* TIMx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Enable the TIM Counter */
    TIMx->CR1 |= CR1_CEN_Set;
  }
  else
  {
    /* Disable the TIM Counter */
    TIMx->CR1 &= CR1_CEN_Reset;
  }
}

/*******************************************************************************
* Function Name  : TIM_ITConfig
* Description    : Enables or disables the TIMx interrupts.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_IT: specifies the TIM interrupts sources to be enabled
*                    or disabled.
*                    This parameter can be any combination of the following values:
*                       - TIM_IT_Update: Timer update Interrupt
*                       - TIM_IT_CC1: Capture Compare 1 Interrupt
*                       - TIM_IT_CC2: Capture Compare 2 Interrupt
*                       - TIM_IT_CC3: Capture Compare 3 Interrupt
*                       - TIM_IT_CC4: Capture Compare 4 Interrupt
*                       - TIM_IT_Trigger: Trigger Interrupt
*                  - Newstate: new state of the specified TIMx interrupts.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ITConfig(TIM_TypeDef* TIMx, u16 TIM_IT, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_TIM_IT(TIM_IT));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Enable the Interrupt sources */
    TIMx->DIER |= TIM_IT;
  }
  else
  {
    /* Disable the Interrupt sources */
    TIMx->DIER &= (u16)(~TIM_IT);
  }
}

/*******************************************************************************
* Function Name  : TIM_DMAConfig
* Description    : Configures the TIMx抯 DMA interface.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_DMABase: DMA Base address.
*                    This parameter can be one of the following values:
*                       - TIM_DMABase_CR1, TIM_DMABase_CR2, TIM_DMABase_SMCR,
*                         TIM_DMABase_DIER, TIM_DMABase_SR, TIM_DMABase_EGR,
*                         TIM_DMABase_CCMR1, TIM_DMABase_CCMR2, TIM_DMABase_CCER,
*                         TIM_DMABase_CNT, TIM_DMABase_PSC, TIM_DMABase_ARR,
*                         TIM_DMABase_CCR1, TIM_DMABase_CCR2, TIM_DMABase_CCR3,
*                         TIM_DMABase_CCR4, TIM_DMABase_DCR.
*                  - TIM_DMABurstLength: DMA Burst length.
*                    This parameter can be one value between:
*                    TIM_DMABurstLength_1Byte and TIM_DMABurstLength_18Bytes.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_DMAConfig(TIM_TypeDef* TIMx, u16 TIM_DMABase, u16 TIM_DMABurstLength)
{
  u32 tmpdcr = 0;

  /* Check the parameters */
  assert_param(IS_TIM_DMA_BASE(TIM_DMABase));
  assert_param(IS_TIM_DMA_LENGTH(TIM_DMABurstLength));
  
  tmpdcr = TIMx->DCR;

  /* Reset the DBA and the DBL Bits */
  tmpdcr &= DCR_DMA_Mask;

  /* Set the DMA Base and the DMA Burst Length */
  tmpdcr |= TIM_DMABase | TIM_DMABurstLength;

  TIMx->DCR = (u16)tmpdcr;
}

/*******************************************************************************
* Function Name  : TIM_DMACmd
* Description    : Enables or disables the TIMx抯 DMA Requests.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_DMASources: specifies the DMA Request sources.
*                    This parameter can be any combination of the following values:
*                       - TIM_DMA_CC1: Capture Compare 1 DMA source
*                       - TIM_DMA_CC2: Capture Compare 2 DMA source
*                       - TIM_DMA_CC3: Capture Compare 3 DMA source
*                       - TIM_DMA_CC4: Capture Compare 4 DMA source
*                       - TIM_DMA_Trigger: 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)
{
  u32 tmpdier = 0;
  
  /* Check the parameters */
  assert_param(IS_TIM_DMA_SOURCE(TIM_DMASource));
  assert_param(IS_FUNCTIONAL_STATE(Newstate));

  tmpdier = TIMx->DIER;

  if (Newstate != DISABLE)
  {
    /* Enable the DMA sources */
    tmpdier |= TIM_DMASource;
  }
  else
  {
    /* Disable the DMA sources */
    tmpdier &= (u16)(~TIM_DMASource);
  }
  TIMx->DIER = (u16)tmpdier;
}

/*******************************************************************************
* Function Name  : TIM_InternalClockConfig
* Description    : Configures the TIMx interrnal Clock
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_InternalClockConfig(TIM_TypeDef* 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 2, 3 or 4 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_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 2, 3 or 4 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, u8 ICFilter)
{
  /* Check the parameters */
  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 2, 3 or 4 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,
                             u8 ExtTRGFilter)
{