delay.c

嵌入式系统开发 MRC 522 S50 S70

#define DELAY_GLOBALS
#include "config.h"
#include "Zlg500S.h"
#include "zlg500S_test.h"

void __irq Timer0_Isr(void)
{
	if(WaitRespDly)
		WaitRespDly--;
		
	if(LedDly)
		LedDly--;	

	T0IR = 0x01;		//清定时器0中断标志	
	VICVectAddr = 0;	
}

/**********************************************
定时器0初始化为5ms中断一次

**********************************************/
void Time0Init(void)
{
	T0PR = 0;	//预分频器不分频
	T0TC = 0;	//定时器初值为0
	T0MCR = (T0MCR & 0xfff8) | 0x0003;	//T0匹配后复位,且产生中断
	T0MR0 = Fpclk/200;		//5ms中断一次
	
	VICIntSelect &= ~(1 << 4);	//设置定时器0中断通道为IRQ
	VICVectAddr15 = (uint32)Timer0_Isr;	//ZLG500S中断矢量地址初始化
	VICVectCntl15 = 0x20 | 4;
	VICIntEnable = 1 << 4;
	
	T0TCR = 0x01;	//启动定时器0
}