ttim55.c

来自「TI OMAP5910(1510)的最简单测试程序,用于 硬件最初的调试,简要」· C语言 代码 · 共 72 行

//test timer 55
#ifndef _TTIM55_C
#define _TTIM55_C
#include <stdio.h>
#include "includes.h"

#include "ttim55.h"
Uint16 tim_cnt=0,ledtim=0;
void InitTimer(Uint16 tim_no,Uint32 prd)
{	
	Uint16 old_intm=0,eventId=0,i=0;
		
	TIMER_Setup setTTimer={0, //period
						   0x0ffff,//PTV
						   TIMER_TCR_AR_RESET}; //auto reload 
	
	if(tim_no>2){
		printf("timer no. %d is invalid\n",tim_no);
		puts("valid timer no.:0/1\n");
		return;
	}
	
		old_intm = IRQ_globalDisable();
	
		hTTimer = TIMER_open(tim_no, TIMER_OPEN_RESET);
		TIMER_stop(hTTimer);
		cfgTTimer.tcr =  TIMER_TCR_DEFAULT;
		cfgTTimer.Lth = prd>>16;
		cfgTTimer.Ltl = prd&0xFFFF;
		/* Configure the Timer */
	//	printf("tim_no=%d ,prd_h=%u,prd_l=%u \n",tim_no,cfgTTimer.Lth,cfgTTimer.Ltl);
		TIMER_config(hTTimer, &cfgTTimer);
		TIMER_setup(hTTimer, &setTTimer);
		/* Get the Configuration */
		TIMER_getConfig( hTTimer , &cfgTTimer);
		
		eventId = TIMER_getEventId(hTTimer);

		IRQ_clear(eventId);

		IRQ_plug(eventId, TimerIsr,3);

    	IRQ_enable(eventId);

    	IRQ_globalRestore(old_intm);

		/* Start the timer */
		
		TIMER_start(hTTimer) ;
		printf("t%d\n",i++);
}


void TimerIsr(void)
{
//	printf("timer is running:tick %d\n",tim_cnt);	
	//IRQ_globalDisable();
	if((tim_cnt&0x7f)==0){
		ledtim=ledtim^0x01;
		WrGpio(1,ledtim);
		//printf("led=%d\n",ledtim);
	 }
	 tim_cnt++;
	tim_cnt=tim_cnt&0x7fff;
	 //	IRQ_enable(22);
	//IRQ_globalEnable();
	//TIMER_start(hTTimer) ;
	
}

#endif