timea.c

来自「DSP部分功能测试 串口」· C语言 代码 · 共 52 行

#include    "f2407_c.h"

unsigned int time_cnt=0x0100;	/*time1 1s count*/ 
extern unsigned int lcddata[0x250];

extern void timeA1_init(void)
{
	*T1CON=0x170c;				/*Time1 increase mode prescale=128*/
	*GPTCONA=0x6000;
	*EVAIMRA=*EVAIMRA|0x0080;	/*enable Time1 period interrupt*/
	*EVAIFRA=0xffff;	/*clear Time1 period interrupt flag*/
	*T1PR=0x00ea;				/*1 period = 1ms*/
	*T1CNT=0;					/*Time1 clear*/
	
}


void interrupt inter2(void)
{
	*IFR=0xffff;
	*EVAIFRA=0xffff;
	switch(*PIVR)
	{
		case 0x0027: 			/*time1 period interrupt*/
		{
		/*	*T1CNT=0; */
		
			
			time_cnt--;
			if(!(time_cnt))
			{
				lcddata[0x200]++;
				time_cnt=0x0100;
			}
			
			break;
		}
		default:;
		
	}
	
	enable();
}