75x_pwm.c

嵌入式实验源码。包括：电源管理、复位、时钟管理

* Return         : None
*******************************************************************************/
void PWM_SetPeriod(u16 Period)
{
  PWM->ARR = Period;
}

/*******************************************************************************
* Function Name  : PWM_SetPulse
* Description    : Sets the PWM pulse value.
* Input          : - PWM_Channel: specifies the PWM channel to be used.
*                    This parameter can be one of the following values:
*                         - PWM_Channel_1: PWM Channel 1 is used
*                         - PWM_Channel_2: PWM Channel 2 is used
*                         - PWM_Channel_3: PWM Channel 3 is used
*                         - PWM_Channel_ALL: PWM Channel 1, Channel 2 and 3 are used
*                  - Pulse: PWM pulse new value.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_SetPulse(u16 PWM_Channel, u16 Pulse)
{
  /* Sets Channel 1 pulse value */
  if(PWM_Channel == PWM_Channel_1)
  {
    PWM->OCR1 = Pulse;
  }
  /* Sets Channel 2 pulse value */
  else if(PWM_Channel == PWM_Channel_2)
  {
    PWM->OCR2 = Pulse;
  }
  /* Sets Channel 3 pulse value */
  else if(PWM_Channel == PWM_Channel_3)
  {
    PWM->OCR3 = Pulse;
  }
  /* Sets Channel 1, Channel 2 and Channel 3 pulse values */
  else if(PWM_Channel == PWM_Channel_ALL)
  {
    PWM->OCR1 = Pulse;
    PWM->OCR2 = Pulse;
    PWM->OCR3 = Pulse;
  }
}

/*******************************************************************************
* Function Name  : PWM_SetPulse1
* Description    : Sets the PWM Channel 1 pulse value.
* Input          : - Pulse: PWM Channel 1 pulse new value.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_SetPulse1(u16 Pulse)
{
  PWM->OCR1 = Pulse;
}

/*******************************************************************************
* Function Name  : PWM_SetPulse2
* Description    : Sets the PWM Channel 2 pulse value.
* Input          : - Pulse: PWM Channel 2 pulse new value.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_SetPulse2(u16 Pulse)
{
  PWM->OCR2 = Pulse;
}

/*******************************************************************************
* Function Name  : PWM_SetPulse3
* Description    : Sets the PWM Channel 3 pulse value.
* Input          : - Pulse: PWM Channel 3 pulse new value.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_SetPulse3(u16 Pulse)
{
  PWM->OCR3 = Pulse;
}

/*******************************************************************************
* Function Name  : PWM_DebugCmd
* Description    : Enables or disables PWM peripheral Debug control.
* Input          : Newstate: new state of the PWM Debug control.
*                  This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_DebugCmd(FunctionalState Newstate)
{
  if(Newstate == ENABLE)
  {
    PWM->CR |= PWM_DBGC_Set;
  }
  else
  {
    PWM->CR &= PWM_DBGC_Reset;
  }
}

/*******************************************************************************
* Function Name  : PWM_CounterModeConfig
* Description    : Specifies the Counter Mode to be used.
* Input          : PWM_CounterMode: specifies the Counter Mode to be used
*                  This parameter can be one of the following values:
*                         - PWM_CounterMode_Up: PWM Up Counting Mode
*                         - PWM_CounterMode_Down: PWM Down Counting Mode
*                         - PWM_CounterMode_CenterAligned1: PWM Center Aligned1 Mode
*                         - PWM_CounterMode_CenterAligned2: PWM Center Aligned2 Mode
*                         - PWM_CounterMode_CenterAligned3: PWM Center Aligned3 Mode
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_CounterModeConfig(u16 PWM_CounterMode)
{
  /* Counter mode configuration */
  PWM->CR &= PWM_CounterMode_Mask;
  PWM->CR |= PWM_CounterMode;
}

/*******************************************************************************
* Function Name  : PWM_ForcedOCConfig
* Description    : Forces the PWM output waveform to active or inactive level.
* Input          : - PWM_Channel: specifies the PWM channel to be used.
*                    This parameter can be one of the following values:
*                         - PWM_Channel_1: PWM Channel 1 is used
*                         - PWM_Channel_2: PWM Channel 2 is used
*                         - PWM_Channel_3: PWM Channel 3 is used
*                         - PWM_Channel_ALL: PWM Channel 1, Channel 2 and 3 are used
*                  - PWM_ForcedAction: specifies the forced Action to be set to the
*                    output waveform.
*                    This parameter can be one of the following values:
*                         - PWM_ForcedAction_Active: Force active level on OCxREF
*                         - PWM_ForcedAction_InActive: Force inactive level on 
*                           OCxREF
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_ForcedOCConfig(u16 PWM_Channel, u16 PWM_ForcedAction)
{
  /* Channel 1 Forced Output Compare mode configuration */
  if(PWM_Channel == PWM_Channel_1)
  {
    PWM->OMR1 &= PWM_OC1C_Mask;
    PWM->OMR1 |= PWM_ForcedAction;
  }
  /* Channel 2 Forced Output Compare mode configuration */
  else
  {
    if(PWM_Channel == PWM_Channel_2)
    {
      PWM->OMR1 &= PWM_OC2C_Mask;
      PWM->OMR1 |= (PWM_ForcedAction<<8);
    }
    else
    {
      /* Channel 3 Forced Output Compare mode configuration */
      if(PWM_Channel == PWM_Channel_3)
      {
        PWM->OMR2 &= PWM_OC3C_Mask;
        PWM->OMR2 |= PWM_ForcedAction;
      }
      /* Channel 1, Channel 2 and Channel 3 Forced Output Compare mode 
      configuration */
      else
      {
        PWM->OMR1 &= PWM_OC1C_Mask;
        PWM->OMR1 |= PWM_ForcedAction;

        PWM->OMR1 &= PWM_OC2C_Mask;
        PWM->OMR1 |= (PWM_ForcedAction<<8);
        
        PWM->OMR2 &= PWM_OC3C_Mask;
        PWM->OMR2 |= PWM_ForcedAction;
      }
    }
  }
}

/*******************************************************************************
* Function Name  : PWM_SetDeadTime
* Description    : Inserts dead time between the OCx and OCNx.
* Input          : DeadTime: PWM Dead Time value.
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_SetDeadTime(u16 DeadTime)
{
  /* Sets the dead time value */
  PWM->DTR &= PWM_DTR_Mask;
  PWM->DTR |= DeadTime;
}

/*******************************************************************************
* Function Name  : PWM_ResetCounter
* Description    : Re-intializes the PWM counter and generates an update of the
*                  registers.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_ResetCounter(void)
{
  /* Resets the PWM counter */
  PWM->CR |= PWM_COUNTER_Reset;
}

/*******************************************************************************
* Function Name  : PWM_TRGOSelection
* Description    : Sets the PWM Master Mode selection bits.
* Input          : PWM_TRGOMode: specifies the TRGO source.
*                  This parameter can be one of the following values:
*                         - PWM_TRGOMode_Enable: The CNT_EN bit is used as TRGO
*                         - PWM_TRGOMode_Update: The Update event is used as TRGO
*                         - PWM_TRGOMode_Reset: The CNT_RST bit is used as TRGO
*                         - PWM_TRGOMode_OC: The OC1 signal is used as TRGO
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_TRGOSelection(u16 PWM_TRGOMode)
{
  /* Sets the synchronization action */
  PWM->CR &= PWM_MasterModeSelection_Mask;
  PWM->CR |= PWM_TRGOMode;
}

/*******************************************************************************
* Function Name  : PWM_GetFlagStatus
* Description    : Checks whether the specified PWM flag is set or not.
* Input          : PWM_FLAG: specifies the flag to check.
*                  This parameter can be one of the following values:
*                         - PWM_FLAG_OC1: Output Compare 1 Flag
*                         - PWM_FLAG_OC2: Output Compare 2 Flag
*                         - PWM_FLAG_OC3: Output Compare 3 Flag
*                         - PWM_FLAG_Update: PWM update Flag
*                         - PWM_FLAG_Emergency: PWM Emergency Flag
* Output         : None
* Return         : The new state of the PWM_FLAG(SET or RESET).
*******************************************************************************/
FlagStatus PWM_GetFlagStatus(u16 PWM_FLAG)
{
  if((PWM->ISR & PWM_FLAG) != RESET )
  {
    return SET;
  }
  else
  {
    return RESET;
  }
}

/*******************************************************************************
* Function Name  : PWM_ClearFlag
* Description    : Clears the PWM抯 pending flags. 
* Input          : PWM_FLAG: specifies the flag to clear. 
*                  This parameter can be any combination of the following values:
*                         - PWM_FLAG_OC1: Output Compare 1 flag
*                         - PWM_FLAG_OC2: Output Compare 2 flag
*                         - PWM_FLAG_OC3: Output Compare 3 flag
*                         - PWM_FLAG_Update: PWM update flag
*                         - PWM_FLAG_Emergency: PWM Emergency flag
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_ClearFlag(u16 PWM_FLAG)
{
  /* Clears the flags */
  PWM->ISR &= ~PWM_FLAG;
}

/*******************************************************************************
* Function Name  : PWM_GetITStatus
* Description    : Checks whether the PWM interrupt has occurred or not.
* Input          : PWM_IT: specifies the PWM interrupt source to check. 
*                  This parameter can be one of the following values:
*                         - PWM_IT_OC1: PWM Output Compare 1 Interrupt source
*                         - PWM_IT_OC2: PWM Output Compare 2 Interrupt source
*                         - PWM_IT_OC3: PWM Output Compare 3 Interrupt source
*                         - PWM_IT_Update: PWM update Interrupt source
*                         - PWM_IT_Emergency: PWM Emergency interrupt source
*                         - PWM_IT_GlobalUpdate: PWM global update Interrupt
*                           source
* Output         : None
* Return         : The new state of the PWM_IT(SET or RESET).
*******************************************************************************/
ITStatus PWM_GetITStatus(u16 PWM_IT)
{
  u16 PWM_IT_Check = 0;

  /* Calculates the pending bits to be checked */
  PWM_IT_Check = PWM_IT & PWM_IT_Clear_Mask;
  
  if((PWM->ISR & PWM_IT_Check) != RESET )
  {
    return SET;
  }
  else
  {
    return RESET;
  }
}

/*******************************************************************************
* Function Name  : PWM_ClearITPendingBit
* Description    : Clears the PWM's interrupt pending bits.
* Input          : PWM_IT: specifies the pending bit to clear.
*                  This parameter can be any combination of the following values:
*                         - PWM_IT_OC1: PWM Output Compare 1 Interrupt source
*                         - PWM_IT_OC2: PWM Output Compare 2 Interrupt source
*                         - PWM_IT_OC3: PWM Output Compare 3 Interrupt source
*                         - PWM_IT_Update: PWM update Interrupt source
*                         - PWM_IT_Emergency: PWM Emergency interrupt source
*                         - PWM_IT_GlobalUpdate: PWM global update Interrupt
*                           source
* Output         : None
* Return         : None
*******************************************************************************/
void PWM_ClearITPendingBit(u16 PWM_IT)
{
  u16 PWM_IT_Clear = 0;

  /* Calculates the pending bits to be cleared */
  PWM_IT_Clear = PWM_IT & PWM_IT_Clear_Mask;

  /* Clears the pending bits */
  PWM->ISR &= ~PWM_IT_Clear;
  
}

/*******************************************************************************
* Function Name  : OCM_ModuleConfig
* Description    : Output Compare Module configuration.
* Input          : PWM_InitStruct: pointer to a PWM_InitTypeDef structure that
*                  contains the configuration information for the PWM peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
static void OCM_ModuleConfig(PWM_InitTypeDef* PWM_InitStruct)
{
  u16 PWM_OCControl = 0x0000;
  u16 DTR_REG = 0x0000;
    
  if(PWM_InitStruct->PWM_Mode == PWM_Mode_OCTiming)
  {
    PWM_OCControl = PWM_OCControl_OCTiming;
  }
  else
  {
    if(PWM_InitStruct->PWM_Mode == PWM_Mode_OCActive)
    {
      PWM_OCControl = PWM_OCControl_OCActive;
    }
    else
    {
      if(PWM_InitStruct->PWM_Mode == PWM_Mode_OCInactive)
      {
        PWM_OCControl = PWM_OCControl_OCInactive;
      }
      else
      {
        if(PWM_InitStruct->PWM_Mode == PWM_Mode_OCToggle)
        {
          PWM_OCControl = PWM_OCControl_OCToggle;
        }
        else
        {
          PWM_OCControl = PWM_OCControl_PWM;

        }
      }
    }
  }

  /* Read DTR register */
  DTR_REG = PWM->DTR & 0x8000;

/*Channel 1 Configuration-----------------------------------------------------*/
    if(PWM_InitStruct->PWM_Channel == PWM_Channel_1)
    {
      /* PWM Output Complementary Configuration */
      if(PWM_InitStruct->PWM_Complementary == PWM_Complementary_Enable)
      {
        /* Configures Channel 1 on Output Compare mode */