ticktimer.h

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

#ifndef __TickTimer
#define __TickTimer

#define TIMER_INPUT_CLK		(18874000)

#define	TIMER_PRESCALER_SET	0			/* This value should never be lower than 1 */

/* Valid values for TIMER_PRESCALER_SET are listed below (DEC Column): 

	HEX        DEC       DIVISOR
	000			0			1
	001			1			2
	010         2           4
	011         3           8
	100         4           16
	101         5           32
	110         6           64
	111         7           128

*/

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

interrupt void  TickTimer_Interrupt(void);

#endif