ticktimersim.h

这是CodeWarrior环境下基于freescale单片机上的实时操作系统代码.

#ifndef __TickTimerSim	
#define __TickTimerSim

typedef struct SOFTTIMER 
{
	volatile unsigned char 	Control;
	volatile unsigned char 	Status;
	volatile union {
		struct {	unsigned short value; 		} word;
		struct {
			char	high;
			char 	low;
		} byte;
	} time;
} SOFTTIMER;


#define CTimer  		(*(const SOFTTIMER *)0x0500)
#define TimerReg		time.word.value
#define TimerRegLow		time.byte.low
#define TimerRegHigh	time.byte.high

extern unsigned char TickTimer_Enable    (void);
extern signed char   TickTimer_SetFreqHz (short Freq);

interrupt void  TickTimer_Interrupt(void);

#endif