ticktimer.c

FreeRTOSV4.1.0 安裝文件 FreeRTOS 是一个源码公开的免费的嵌入式实时操作系统

**         The period is expressed in Xtal ticks as a 32-bit unsigned
**         integer number.
**         This method is available only if runtime setting type
**         'from interval' is selected in the Timing dialog box in
**         Runtime setting area.
**     Parameters  :
**         NAME            - DESCRIPTION
**         Ticks           - Period to set [in Xtal ticks]
**                      (16000 to 320000 ticks)
**     Returns     :
**         ---             - Error code, possible codes:
**                           ERR_OK - OK
**                           ERR_SPEED - This device does not work in
**                           the active speed mode
**                           ERR_MATH - Overflow during evaluation
**                           ERR_RANGE - Parameter out of range
** ===================================================================
*/
byte TickTimer_SetPeriodTicks32(dword Ticks)
{
  dlong rtval;                         /* Result of two 32-bit numbers multiplication */
  word rtword;                         /* Result of 64-bit number division */

  if ((Ticks > 320000) || (Ticks < 16000)) /* Is the given value out of range? */
    return ERR_RANGE;                  /* Range error */
  PE_Timer_LngMul(Ticks,838592365,&rtval); /* Multiply given value and high speed CPU mode coefficient */
  if (PE_Timer_LngHi4(rtval[0],rtval[1],&rtword)) /* Is the result greater or equal than 65536 ? */
    rtword = 65535;                    /* If yes then use maximal possible value */
  CmpHighVal = rtword;                 /* Store result (compare register value for high speed CPU mode) to the variable CmpHighVal */
  SetCV(CmpHighVal);                   /* Store appropriate value to the compare register according to the selected high speed CPU mode */
  return ERR_OK;                       /* OK */
}

/*
** ===================================================================
**     Method      :  TickTimer_SetPeriodUS (bean TimerInt)
**
**     Description :
**         This method sets the new period of the generated events.
**         The period is expressed in microseconds as a 16-bit
**         unsigned integer number.
**         This method is available only if runtime setting type
**         'from interval' is selected in the Timing dialog box in
**         Runtime setting area.
**     Parameters  :
**         NAME            - DESCRIPTION
**         Time            - Period to set [in microseconds]
**                      (1000 to 20000 microseconds)
**     Returns     :
**         ---             - Error code, possible codes:
**                           ERR_OK - OK
**                           ERR_SPEED - This device does not work in
**                           the active speed mode
**                           ERR_MATH - Overflow during evaluation
**                           ERR_RANGE - Parameter out of range
** ===================================================================
*/
byte TickTimer_SetPeriodUS(word Time)
{
  dlong rtval;                         /* Result of two 32-bit numbers multiplication */
  word rtword;                         /* Result of 64-bit number division */

  if ((Time > 20000) || (Time < 1000)) /* Is the given value out of range? */
    return ERR_RANGE;                  /* If yes then error */
  PE_Timer_LngMul((dword)Time,52412023,&rtval); /* Multiply given value and high speed CPU mode coefficient */
  if (PE_Timer_LngHi3(rtval[0],rtval[1],&rtword)) /* Is the result greater or equal than 65536 ? */
    rtword = 65535;                    /* If yes then use maximal possible value */
  CmpHighVal = rtword;                 /* Store result (compare register value for high speed CPU mode) to the variable CmpHighVal */
  SetCV(CmpHighVal);                   /* Store appropriate value to the compare register according to the selected high speed CPU mode */
  return ERR_OK;                       /* OK */
}

/*
** ===================================================================
**     Method      :  TickTimer_SetPeriodMS (bean TimerInt)
**
**     Description :
**         This method sets the new period of the generated events.
**         The period is expressed in miliseconds as a 16-bit
**         unsigned integer number.
**         This method is available only if runtime setting type
**         'from interval' is selected in the Timing dialog box in
**         Runtime setting area.
**     Parameters  :
**         NAME            - DESCRIPTION
**         Time            - Period to set [in miliseconds]
**                      (1 to 20 milliseconds)
**     Returns     :
**         ---             - Error code, possible codes:
**                           ERR_OK - OK
**                           ERR_SPEED - This device does not work in
**                           the active speed mode
**                           ERR_MATH - Overflow during evaluation
**                           ERR_RANGE - Parameter out of range
** ===================================================================
*/
byte TickTimer_SetPeriodMS(word Time)
{
  dlong rtval;                         /* Result of two 32-bit numbers multiplication */
  word rtword;                         /* Result of 64-bit number division */

  if ((Time > 20) || (Time < 1))       /* Is the given value out of range? */
    return ERR_RANGE;                  /* If yes then error */
  PE_Timer_LngMul((dword)Time,204734464,&rtval); /* Multiply given value and high speed CPU mode coefficient */
  if (PE_Timer_LngHi2(rtval[0],rtval[1],&rtword)) /* Is the result greater or equal than 65536 ? */
    rtword = 65535;                    /* If yes then use maximal possible value */
  CmpHighVal = rtword;                 /* Store result (compare register value for high speed CPU mode) to the variable CmpHighVal */
  SetCV(CmpHighVal);                   /* Store appropriate value to the compare register according to the selected high speed CPU mode */
  return ERR_OK;                       /* OK */
}

/*
** ===================================================================
**     Method      :  TickTimer_SetFreqHz (bean TimerInt)
**
**     Description :
**         This method sets the new frequency of the generated
**         events. The frequency is expressed in Hz as a 16-bit
**         unsigned integer number.
**         This method is available only if runtime setting type
**         'from interval' is selected in the Timing dialog box in
**         Runtime setting area.
**     Parameters  :
**         NAME            - DESCRIPTION
**         Freq            - Frequency to set [in Hz]
**                      (50 to 1000 Hz)
**     Returns     :
**         ---             - Error code, possible codes:
**                           ERR_OK - OK
**                           ERR_SPEED - This device does not work in
**                           the active speed mode
**                           ERR_MATH - Overflow during evaluation
**                           ERR_RANGE - Parameter out of range
** ===================================================================
*/
byte TickTimer_SetFreqHz(word Freq)
{
  dlong rtval;                         /* Result of two 32-bit numbers division */
  word rtword;                         /* Result of 64-bit number division */

  if ((Freq > 1000) || (Freq < 50))    /* Is the given value out of range? */
    return ERR_RANGE;                  /* If yes then error */
  rtval[1] = 799744000 / (dword)Freq;  /* Divide high speed CPU mode coefficient by the given value */
  rtval[0] = 0;                        /* Convert result to the type dlong */
  if (PE_Timer_LngHi1(rtval[0],rtval[1],&rtword)) /* Is the result greater or equal than 65536 ? */
    rtword = 65535;                    /* If yes then use maximal possible value */
  CmpHighVal = rtword;                 /* Store result (compare register value for high speed CPU mode) to the variable CmpHighVal */
  SetCV(CmpHighVal);                   /* Store appropriate value to the compare register according to the selected high speed CPU mode */
  return ERR_OK;                       /* OK */
}

/*
** ===================================================================
**     Method      :  TickTimer_Init (bean TimerInt)
**
**     Description :
**         This method is internal. It is used by Processor Expert
**         only.
** ===================================================================
*/
void TickTimer_Init(void)
{
  CmpHighVal = 3124;                   /* Compare register value for high speed CPU mode */
  SetCV(CmpHighVal);                   /* Store appropriate value to the compare register according to the selected high speed CPU mode */
  SetPV(3);                            /* Set prescaler register according to the selected high speed CPU mode */
  HWEnDi();                            /* Enable/disable device according to status flags */
}

/*
** ===================================================================
**     Method      :  TickTimer_Interrupt (bean TimerInt)
**
**     Description :
**         This method is internal. It is used by Processor Expert
**         only.
** ===================================================================
*/
#pragma CODE_SEG __NEAR_SEG NON_BANKED /* Interrupt section for this module. Placement will be in NON_BANKED area. */
__interrupt void TickTimer_Interrupt(void)
{
  TFLG1 = 1;                           /* Reset interrupt request flag */
  TickTimer_OnInterrupt();             /* Invoke user event */
}

#pragma CODE_SEG TickTimer_CODE        /* Code section for this module. */

/* END TickTimer. */

/*
** ###################################################################
**
**     This file was created by UNIS Processor Expert 03.33 for 
**     the Motorola HCS12 series of microcontrollers.
**
** ###################################################################
*/