stm32f10x_tim.c

STM32下做的usb转RS232程序

  /* Check the parameters */
  assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler));
  assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity));

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

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

  /* Select the Trigger selection : ETRF */
  TIMx->SMCR &= SMCR_TS_Mask;
  TIMx->SMCR |= TIM_TS_ETRF;
}

/*******************************************************************************
* Function Name  : TIM_ETRClockMode2Config
* Description    : Configures the External clock Mode2
* 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_ETRClockMode2Config(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, 
                             u16 TIM_ExtTRGPolarity, u8 ExtTRGFilter)
{
  /* Check the parameters */
  assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler));
  assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity));

  /* 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 2, 3 or 4 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,
                       u8 ExtTRGFilter)
{
  u32 tmpsmcr = 0;

  tmpsmcr = TIMx->SMCR;

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

  TIMx->SMCR = (u16)tmpsmcr;
}

/*******************************************************************************
* Function Name  : TIM_SelectInputTrigger
* Description    : Selects the Input Trigger source
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_InputTriggerSource: The Input 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
*                       - TIM_TS_TI1F_ED: TI1 Edge Detector
*                       - TIM_TS_TI1FP1: Filtered Timer Input 1
*                       - TIM_TS_TI2FP2: Filtered Timer Input 2
*                       - TIM_TS_ETRF: External Trigger input
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_SelectInputTrigger(TIM_TypeDef* TIMx, u16 TIM_InputTriggerSource)
{
  u32 tmpsmcr = 0;

  /* Check the parameters */
  assert_param(IS_TIM_TRIGGER_SELECTION(TIM_InputTriggerSource));

  tmpsmcr = TIMx->SMCR;

  /* Select the Tgigger Source */
  tmpsmcr &= SMCR_TS_Mask;
  tmpsmcr |= TIM_InputTriggerSource;

  TIMx->SMCR = (u16)tmpsmcr;
}

/*******************************************************************************
* Function Name  : TIM_PrescalerConfig
* Description    : Configures the TIMx Prescaler.
* Input          : - TIMx: where x can be 2, 3 or 4 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_PRESCALER_RELOAD(TIM_PSCReloadMode));

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

  /* Set or reset the UG Bit */
  if (TIM_PSCReloadMode == TIM_PSCReloadMode_Immediate)
  {
    TIMx->EGR |= TIM_EventSource_Update;
  }
  else
  {
    TIMx->EGR &= TIM_EventSource_Update;
  }
}

/*******************************************************************************
* Function Name  : TIM_CounterModeConfig
* Description    : Specifies the TIMx Counter Mode to be used.
* Input          : - TIMx: where x can be 2, 3 or 4 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)
{
  u32 tmpcr1 = 0;

  /* Check the parameters */
  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;

  TIMx->CR1 = (u16)tmpcr1;
}

/*******************************************************************************
* Function Name  : TIM_ForcedOC1Config
* Description    : Forces the TIMx output 1 waveform to active or inactive level.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_ForcedAction: specifies the forced Action to be set to
*                    the output waveform.
*                    This parameter can be one of the following values:
*                       - TIM_ForcedAction_Active: Force active level on OC1REF
*                       - TIM_ForcedAction_InActive: Force inactive level on
*                         OC1REF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ForcedOC1Config(TIM_TypeDef* TIMx, u16 TIM_ForcedAction)
{
  u32 tmpccmr1 = 0;

  /* Check the parameters */
  assert_param(IS_TIM_FORCED_ACTION(TIM_ForcedAction));

  tmpccmr1 = TIMx->CCMR1;

  /* Reset the OCM Bits */
  tmpccmr1 &= CCMR_OCM13_Mask;

  /* Configure The Forced output Mode */
  tmpccmr1 |= TIM_ForcedAction;

  TIMx->CCMR1 = (u16)tmpccmr1;
}

/*******************************************************************************
* Function Name  : TIM_ForcedOC2Config
* Description    : Forces the TIMx output 2 waveform to active or inactive level.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_ForcedAction: specifies the forced Action to be set to
*                    the output waveform.
*                    This parameter can be one of the following values:
*                       - TIM_ForcedAction_Active: Force active level on OC2REF
*                       - TIM_ForcedAction_InActive: Force inactive level on
*                         OC2REF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ForcedOC2Config(TIM_TypeDef* TIMx, u16 TIM_ForcedAction)
{
  u32 tmpccmr1 = 0;

  /* Check the parameters */
  assert_param(IS_TIM_FORCED_ACTION(TIM_ForcedAction));

  tmpccmr1 = TIMx->CCMR1;

  /* Reset the OCM Bits */
  tmpccmr1 &= CCMR_OCM24_Mask;

  /* Configure The Forced output Mode */
  tmpccmr1 |= (u16)(TIM_ForcedAction << 8);

  TIMx->CCMR1 = (u16)tmpccmr1;
}

/*******************************************************************************
* Function Name  : TIM_ForcedOC3Config
* Description    : Forces the TIMx output 3 waveform to active or inactive level.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_ForcedAction: specifies the forced Action to be set to
*                    the output waveform.
*                    This parameter can be one of the following values:
*                       - TIM_ForcedAction_Active: Force active level on OC3REF
*                       - TIM_ForcedAction_InActive: Force inactive level on
*                         OC3REF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ForcedOC3Config(TIM_TypeDef* TIMx, u16 TIM_ForcedAction)
{
  u32 tmpccmr2 = 0;

  /* Check the parameters */
  assert_param(IS_TIM_FORCED_ACTION(TIM_ForcedAction));

  tmpccmr2 = TIMx->CCMR2;

  /* Reset the OCM Bits */
  tmpccmr2 &= CCMR_OCM13_Mask;

  /* Configure The Forced output Mode */
  tmpccmr2 |= TIM_ForcedAction;

  TIMx->CCMR2 = (u16)tmpccmr2;
}

/*******************************************************************************
* Function Name  : TIM_ForcedOC4Config
* Description    : Forces the TIMx output 4 waveform to active or inactive level.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - TIM_ForcedAction: specifies the forced Action to be set to
*                    the output waveform.
*                    This parameter can be one of the following values:
*                       - TIM_ForcedAction_Active: Force active level on OC4REF
*                       - TIM_ForcedAction_InActive: Force inactive level on
*                         OC4REF.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ForcedOC4Config(TIM_TypeDef* TIMx, u16 TIM_ForcedAction)
{
  u32 tmpccmr2 = 0;

  /* Check the parameters */
  assert_param(IS_TIM_FORCED_ACTION(TIM_ForcedAction));

  tmpccmr2 = TIMx->CCMR2;

  /* Reset the OCM Bits */
  tmpccmr2 &= CCMR_OCM24_Mask;

  /* Configure The Forced output Mode */
  tmpccmr2 |= (u16)(TIM_ForcedAction << 8);

  TIMx->CCMR2 = (u16)tmpccmr2;
}

/*******************************************************************************
* Function Name  : TIM_ARRPreloadConfig
* Description    : Enables or disables TIMx peripheral Preload register on ARR.
* Input          : - TIMx: where x can be 2, 3 or 4 to select the TIM peripheral.
*                  - Newstate: new state of the TIMx peripheral Preload register
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ARRPreloadConfig(TIM_TypeDef* TIMx, FunctionalState Newstate)
{
  u32 tmpcr1 = 0;
  
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(Newstate));

  tmpcr1 = TIMx->CR1;

  if (Newstate != DISABLE)
  {
    /* Set the ARR Preload Bit */
    tmpcr1 |= CR1_ARPE_Set;
  }
  else
  {