freescale

Freescale 系列单片机常用模块与综合系统设计

/** ###################################################################
**     THIS COMPONENT MODULE IS GENERATED BY THE TOOL. DO NOT MODIFY IT.
**     Filename  : Timer0_250kHz.C
**     Project   : handheld_ultrasonic_rangefinder
**     Processor : MC9S08JM60CLHE
**     Component : TimerInt
**     Version   : Component 02.157, Driver 01.18, CPU db: 3.00.046
**     Compiler  : CodeWarrior HCS08 C Compiler
**     Date/Time : 2010-1-20, 16:47
**     Abstract  :
**         This bean "TimerInt" implements a periodic interrupt.
**         When the bean and its events are enabled, the "OnInterrupt"
**         event is called periodically with the period that you specify.
**         TimerInt supports also changing the period in runtime.
**         The source of periodic interrupt can be timer compare or reload
**         register or timer-overflow interrupt (of free running counter).
**     Settings  :
**         Timer name                  : TPM1 (16-bit)
**         Compare name                : TPM10
**         Counter shared              : No
**
**         High speed mode
**             Prescaler               : divide-by-1
**             Clock                   : 24000000 Hz
**           Initial period/frequency
**             Xtal ticks              : 48
**             microseconds            : 4
**             seconds (real)          : 0.000004
**             Hz                      : 250000
**             kHz                     : 250
**
**         Runtime setting             : none
**
**         Initialization:
**              Timer                  : Enabled
**              Events                 : Enabled
**
**         Timer registers
**              Counter                : TPM1CNT   [$0021]
**              Mode                   : TPM1SC    [$0020]
**              Run                    : TPM1SC    [$0020]
**              Prescaler              : TPM1SC    [$0020]
**
**         Compare registers
**              Compare                : TPM1C0V   [$0026]
**
**         Flip-flop registers
**              Mode                   : TPM1C0SC  [$0025]
**     Contents  :
**         No public methods
**
**     Copyright : 1997 - 2009 Freescale Semiconductor, Inc. All Rights Reserved.
**     
**     http      : www.freescale.com
**     mail      : [e-mail]
** ###################################################################*/

/* MODULE Timer0_250kHz. */

#include "Events.h"
#include "PE_Error.h"
#include "Timer0_250kHz.h"
#pragma MESSAGE DISABLE C2705          /* WARNING C2705: Possible loss of data */
#pragma MESSAGE DISABLE C5919          /* WARNING C5919: Conversion of floating to unsigned integral */
#pragma MESSAGE DISABLE C5703          /* WARNING C5703: Parameter X declared in function F but not referenced */
#pragma MESSAGE DISABLE C4002          /* Disable warning C4002 "Result not used" */

/*** Internal macros and method prototypes ***/

/*
** ===================================================================
**     Method      :  SetCV (component TimerInt)
**
**     Description :
**         The method computes and sets compare eventually modulo value 
**         for time measuring.
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
#define Timer0_250kHz_SetCV(_Val) ( \
  TPM1C0V = (word)(_Val), \
  TPM1MOD = (word)(_Val) )


/*** End of internal method prototypes ***/

/*
** ===================================================================
**     Method      :  Timer0_250kHz_Init (component TimerInt)
**
**     Description :
**         Initializes the associated peripheral(s) and the beans 
**         internal variables. The method is called automatically as a 
**         part of the application initialization code.
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
void Timer0_250kHz_Init(void)
{
  /* TPM1SC: TOF=0,TOIE=0,CPWMS=0,CLKSB=0,CLKSA=0,PS2=0,PS1=0,PS0=0 */
  setReg8(TPM1SC, 0x00);               /* Stop HW; disable overflow interrupt and set prescaler to 0 */ 
  /* TPM1C0SC: CH0F=0,CH0IE=1,MS0B=0,MS0A=1,ELS0B=0,ELS0A=0,??=0,??=0 */
  setReg8(TPM1C0SC, 0x50);             /* Set output compare mode and enable compare interrupt */ 
  Timer0_250kHz_SetCV(0x5FU);          /* Inicialize appropriate value to the compare/modulo/reload register */
  /* TPM1CNTH: BIT15=0,BIT14=0,BIT13=0,BIT12=0,BIT11=0,BIT10=0,BIT9=0,BIT8=0 */
  setReg8(TPM1CNTH, 0x00);             /* Reset HW Counter */ 
  /* TPM1SC: TOF=0,TOIE=0,CPWMS=0,CLKSB=0,CLKSA=1,PS2=0,PS1=0,PS0=0 */
  setReg8(TPM1SC, 0x08);               /* Set prescaler and run counter */ 
}


/*
** ===================================================================
**     Method      :  Timer0_250kHz_Interrupt (component TimerInt)
**
**     Description :
**         The method services the interrupt of the selected peripheral(s)
**         and eventually invokes the beans event(s).
**         This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
ISR(Timer0_250kHz_Interrupt)
{
  /* TPM1C0SC: CH0F=0 */
  clrReg8Bits(TPM1C0SC, 0x80);         /* Reset compare interrupt request flag */ 
  Timer0_250kHz_OnInterrupt();         /* Invoke user event */
}



/* END Timer0_250kHz. */

/*
** ###################################################################
**
**     This file was created by Processor Expert 3.07 [04.34]
**     for the Freescale HCS08 series of microcontrollers.
**
** ###################################################################
*/