lpc_timer.c

philips的LPC214X的LCD显示程序

        PINSEL1_bit.P0_20 = 0x2;
      break;
    }
    return 0;
  }
  return 1;
}

/*************************************************************************
 * Function Name: TIMER_GetTimerExternalMatch
 * Parameters:  LPC_TimerChanel_t DevNum
 *          unsigned int MRNum,
 *          unsigned int *pAction,
 *          unsigned int *pExternalMatchValue
 * Return: int
 *              0: success
 *   non-zero: error number
 * Description: Get correponding external matching information from specific timer.
 *
 *************************************************************************/
int TIMER_GetTimerExternalMatch(LPC_TimerChanel_t DevNum, unsigned int MRNum,
            unsigned int * pAction , unsigned int *pExternalMatchValue)
{
  if (MRNum >= CH_MAXNUM)
    return 1;
  switch(DevNum)
  {
  case TIMER0:
    *pExternalMatchValue = Timer0Config.ExtAction[MRNum];
    *pAction = Timer0Config.MatchCH[MRNum].Action;
    break;
  case TIMER1:
    *pExternalMatchValue = Timer1Config.ExtAction[MRNum];
    *pAction = Timer1Config.MatchCH[MRNum].Action;
    break;
  default:
    return 1;
  }
  return 0;
}


/*************************************************************************
 * Function Name: TIMER_GetTimerCapture
 * Parameters:  LPC_TimerChanel_t DevNum,
 *    unsigned int CRNum,
 *    unsigned int * pCaptureValue
 * Return: int
 *              0: success
 *   non-zero: error number
 * Description: Get correponding capture information from specific timer.
 *
 *************************************************************************/
int TIMER_GetTimerCapture(LPC_TimerChanel_t DevNum, unsigned int CRNum,
            unsigned int * pCaptureValue)
{
  switch(DevNum)
  {
  case TIMER0:
    if (CRNum >= CPCH_MAXNUM-1)
      return 1;
    *pCaptureValue = Timer0Config.CaptureCH[CRNum].CPValue;
    break;
  case TIMER1:
    if (CRNum >= CPCH_MAXNUM)
      return 1;
    *pCaptureValue = Timer1Config.CaptureCH[CRNum].CPValue;
    break;
  default:
    return 1;
  }
  return 0;
}


/*************************************************************************
 * Function Name: TIMER_SetCaptureAction
 * Parameters:  LPC_TimerChanel_t DevNum  -- Device Number
 *          unsigned char CPCHNum -- Capture Channel Number
 *    unsigned char TriggerType -- Rising edge | Falling edge
 *    bool EnableInt -- whether interrupt is generated
 *    void (* Fnpr)(void *) -- ISR function pointer
 *    void * FnprArg -- relative argument
 *
 * Return: int
 *              0: success
 *   non-zero: error number
 * Description: Set correponding capture trigger type and other information to the channel
 *    for specific timer.
 *
 *************************************************************************/
int TIMER_SetCaptureAction (LPC_TimerChanel_t DevNum,
                              unsigned char CPCHNum,
                              unsigned char  TriggerType,
                              bool EnableInt,
                              void (* Fnpr)(void *),
                              void * FnprArg )
{
  // Check parameter valid
  if (TriggerType > TimerCPTrigger_Rising+TimerCPTrigger_Falling)
    return 1;
  switch (DevNum)
  {
  case TIMER0:
    if (CPCHNum > CPCH_MAXNUM-2)  // for timer 0 cature chanel 3 is not exist
      return 1;
    Timer0Config.CaptureCH[CPCHNum].Enable = true;
    Timer0Config.CaptureCH[CPCHNum].TriggerType = TriggerType;

    // Clear Capture actions
    T0CCR &= ~(7 << (3*CPCHNum));
    // Assign of pin to capture module
    switch (CPCHNum)
    {
    case CH0:
      if (TriggerType == 0)
        PINSEL0_bit.P0_2 = 0;
      else
        PINSEL0_bit.P0_2 = 0x2;
      break;
    case CH1:
      if (TriggerType == 0)
        PINSEL0_bit.P0_4 = 0;
      else
        PINSEL0_bit.P0_4 = 0x2;
      break;
    case CH2:
      if (TriggerType == 0)
        PINSEL0_bit.P0_6 = 0;
      else
        PINSEL0_bit.P0_6 = 0x2;
      break;
    }
    //Set Capture on Rising Edge
    if (TriggerType & TimerCPTrigger_Rising)
      T0CCR |= TimerCPTrigger_Rising << (3*CPCHNum);
    //Set Capture on Falling Edge
    if (TriggerType & TimerCPTrigger_Falling)
      T0CCR |= TimerCPTrigger_Falling << (3*CPCHNum);

    //Set Interrupt on Capture
    if (EnableInt && TriggerType)
    {
      Timer0Config.CaptureCH[CPCHNum].EnableInt = true;
      Timer0Config.CaptureCH[CPCHNum].Fnpr = Fnpr;
      Timer0Config.CaptureCH[CPCHNum].FnprArg = FnprArg;
      T0CCR |= 0x4 << (3*CPCHNum);
    }
    else
    {
      Timer0Config.CaptureCH[CPCHNum].EnableInt = false;
      Timer0Config.CaptureCH[CPCHNum].Fnpr = NULL;
      Timer0Config.CaptureCH[CPCHNum].FnprArg = (void *)0;
    }
    return 0;
  case TIMER1:
    if (CPCHNum > CPCH_MAXNUM-1)
      return 1;
    Timer1Config.CaptureCH[CPCHNum].Enable = true;
    Timer1Config.CaptureCH[CPCHNum].TriggerType = TriggerType;

    // Clear Capture actions
    T1CCR &= ~(7 << (3*CPCHNum));
    // Assign of pin to capture module
    switch (CPCHNum)
    {
    case CH0:
      if (TriggerType == 0)
        PINSEL0_bit.P0_10 = 0;
      else
        PINSEL0_bit.P0_10 = 0x2;
      break;
    case CH1:
      if (TriggerType)
        PINSEL0_bit.P0_11 = 0x2;
      break;
    case CH2:
      if (TriggerType == 0)
        PINSEL1_bit.P0_17 = 0;
      else
        PINSEL1_bit.P0_17 = 0x2;
      break;
    case CH3:
      if (TriggerType == 0)
        PINSEL1_bit.P0_18 = 0;
      else
        PINSEL1_bit.P0_18 = 0x2;
      break;
    }
    //Set Capture on Rising Edge
    if (TriggerType & TimerCPTrigger_Rising)
      T1CCR |= TimerCPTrigger_Rising << (3*CPCHNum);

    //Set Capture on Falling Edge
    if (TriggerType & TimerCPTrigger_Falling)
      T1CCR |= TimerCPTrigger_Falling << (3*CPCHNum);

    //Set Interrupt on Capture
    if (EnableInt && TriggerType)
    {
      Timer1Config.CaptureCH[CPCHNum].EnableInt = true;
      Timer1Config.CaptureCH[CPCHNum].Fnpr = Fnpr;
      Timer1Config.CaptureCH[CPCHNum].FnprArg = FnprArg;
      T1CCR |= 0x4 << (3*CPCHNum);
    }
    else
    {
      Timer1Config.CaptureCH[CPCHNum].EnableInt = false;
      Timer1Config.CaptureCH[CPCHNum].Fnpr = NULL;
      Timer1Config.CaptureCH[CPCHNum].FnprArg = (void *)0;
    }
    return 0;
  }
  return 1;
}

/*************************************************************************
 * Function Name: TIMER_GetREGValue_CR
 * Parameters:  LPC_TimerChanel_t DevNum
 *          int CRNum
 * Return: unsigned long
 *
 * Description: Get CR register value
 *
 *************************************************************************/
unsigned long TIMER_GetREGValue_CR(LPC_TimerChanel_t DevNum, int CRNum)
{
  switch (DevNum)
  {
  case TIMER0:
    switch(CRNum)
    {
    case CPCH0:
      return T0CR0;
    case CPCH1:
      return T0CR1;
    case CPCH2:
      return T0CR2;
    case CPCH3:
      return T0CR3;
    }
  case TIMER1:
    switch(CRNum)
    {
    case CPCH0:
      return T1CR0;
    case CPCH1:
      return T1CR1;
    case CPCH2:
      return T1CR2;
    case CPCH3:
      return T1CR3;
    }
  }
  return (unsigned int)-1;
}

/*************************************************************************
 * Function Name: TIMER_GetREGValue_TC
 * Parameters: LPC_TimerChanel_t DevNum
 * Return: unsigned long
 *
 * Description: Get TC register value
 *
 *************************************************************************/
unsigned long TIMER_GetREGValue_TC(LPC_TimerChanel_t DevNum)
{
  switch (DevNum)
  {
  case TIMER0:
    return T0TC;
  case TIMER1:
    return T1TC;
  }
  return (unsigned int)-1;
}

/*************************************************************************
 * Function Name: TIMER_CheckIntSrc
 * Parameters: LPC_TimerChanel_t DevNum
 * Return: unsigned long
 *  TIMERMR0...3Int | TIMERCR0...3Int
 *
 * Description: Get Timer interrupt Type
 *
 *************************************************************************/
unsigned long TIMER_CheckIntType(LPC_TimerChanel_t DevNum)
{
  switch (DevNum)
  {
  case TIMER0:
    return (T0IR & 0xFF);
  case TIMER1:
    return (T1IR & 0xFF);
  default:
    return (unsigned long)-1;
  }
}

/*************************************************************************
 * Function Name: RTC_ClearInt
 * Parameters:  LPC_TimerChanel_t DevNum
 *          int IntType
 *
 * Return: unsigned long
 *              0: sucess
 *    1: fail
 *
 * Description: Clear Timer interrupt.
 *
 *************************************************************************/
unsigned long TIMER_ClearInt(LPC_TimerChanel_t DevNum, int IntType)
{
  if (IntType<1 || IntType>0xFF)
    return 1;

  switch (DevNum)
  {
  case TIMER0:
    T0IR = (IntType & 0xFF);
    break;
  case TIMER1:
    T1IR = (IntType & 0xFF);
    break;
  default:
    return 1;
  }
  return 0;
}

/*************************************************************************
 * Function Name: T0ISR
 * Parameters: void
 * Return: void
 *
 * Description: TIMER0 interrupt subroutine
 *
 *************************************************************************/
void TIMER0_ISR ()
{
int IntStatus;
  IntStatus = TIMER_CheckIntType(TIMER0);
  TIMER_ClearInt(TIMER0, IntStatus);

  /* Match Register Interrupt */
  if (IntStatus & TIMERMR0Int)
  {
    (Timer0Config.MatchCH[0].Fnpr)((void *)Timer0Config.MatchCH[0].FnprArg);
  }

  if (IntStatus & TIMERMR1Int)
  {
    (Timer0Config.MatchCH[1].Fnpr)((void *)Timer0Config.MatchCH[1].FnprArg);
  }

  if (IntStatus & TIMERMR2Int)
  {
    (Timer0Config.MatchCH[2].Fnpr)((void *)Timer0Config.MatchCH[2].FnprArg);
  }

  if (IntStatus & TIMERMR3Int)
  {
    (Timer0Config.MatchCH[3].Fnpr)((void *)Timer0Config.MatchCH[3].FnprArg);
  }

  /* Capture Register Interrupt */
  if (IntStatus & TIMERCR0Int)
  {
    Timer0Config.CaptureCH[0].CPValue = TIMER_GetREGValue_CR(TIMER0, CPCH0);
    (Timer0Config.CaptureCH[0].Fnpr)((void *)Timer0Config.CaptureCH[0].FnprArg);
  }

  if (IntStatus & TIMERCR1Int)
  {
    Timer0Config.CaptureCH[1].CPValue = TIMER_GetREGValue_CR(TIMER0, CPCH1);
    (Timer0Config.CaptureCH[1].Fnpr)((void *)Timer0Config.CaptureCH[1].FnprArg);
  }

  if (IntStatus & TIMERCR2Int)
  {
    Timer0Config.CaptureCH[2].CPValue = TIMER_GetREGValue_CR(TIMER0, CPCH2);
    (Timer0Config.CaptureCH[2].Fnpr)((void *)Timer0Config.CaptureCH[2].FnprArg);
  }

  if (IntStatus & TIMERCR3Int)
  {
    Timer0Config.CaptureCH[3].CPValue = TIMER_GetREGValue_CR(TIMER0, CPCH3);
    (Timer0Config.CaptureCH[3].Fnpr)((void *)Timer0Config.CaptureCH[3].FnprArg);
  }
  VICVectAddr = 0;    // Clear interrupt in VIC.
}

/*************************************************************************
 * Function Name: T1ISR
 * Parameters: void
 * Return: void
 *
 * Description: TIMER1 interrupt subroutine
 *
 *************************************************************************/
void TIMER1_ISR ()
{
  int IntStatus;

  IntStatus = TIMER_CheckIntType(TIMER1);
  TIMER_ClearInt(TIMER1, IntStatus);

  /* Match Register Interrupt */
  if (IntStatus & TIMERMR0Int)
  {
    (Timer1Config.MatchCH[0].Fnpr)((void *)Timer1Config.MatchCH[0].FnprArg);
  }

  if (IntStatus & TIMERMR1Int)
  {
    (Timer1Config.MatchCH[1].Fnpr)((void *)Timer1Config.MatchCH[1].FnprArg);
  }

  if (IntStatus & TIMERMR2Int)
  {
    (Timer1Config.MatchCH[2].Fnpr)((void *)Timer1Config.MatchCH[2].FnprArg);
  }

  if (IntStatus & TIMERMR3Int)
  {
    (Timer1Config.MatchCH[3].Fnpr)((void *)Timer1Config.MatchCH[3].FnprArg);
  }

  /* Capture Register Interrupt */
  if (IntStatus & TIMERCR0Int)
  {
    Timer1Config.CaptureCH[0].CPValue = TIMER_GetREGValue_CR(TIMER1, CPCH0);
    (Timer1Config.CaptureCH[0].Fnpr)((void *)Timer1Config.CaptureCH[0].FnprArg);
  }

  if (IntStatus & TIMERCR1Int)
  {
    Timer1Config.CaptureCH[1].CPValue = TIMER_GetREGValue_CR(TIMER1, CPCH1);
    (Timer1Config.CaptureCH[1].Fnpr)((void *)Timer1Config.CaptureCH[1].FnprArg);
  }

  if (IntStatus & TIMERCR2Int)
  {
    Timer1Config.CaptureCH[2].CPValue = TIMER_GetREGValue_CR(TIMER1, CPCH2);
    (Timer1Config.CaptureCH[2].Fnpr)((void *)Timer1Config.CaptureCH[2].FnprArg);
  }

  if (IntStatus & TIMERCR3Int)
  {
    Timer1Config.CaptureCH[3].CPValue = TIMER_GetREGValue_CR(TIMER1, CPCH3);
    (Timer1Config.CaptureCH[3].Fnpr)((void *)Timer1Config.CaptureCH[3].FnprArg);
  }

  VICVectAddr = 0;    // Clear interrupt in VIC.
}