irq.asm

该程序是用C编写的

.INCLUDE hardware.inc

.PUBLIC _IRQ3, _IRQ5;
.EXTERNAL	_TimeCount;        // 触发计时
.EXTERNAL   Per500msSet        //2Hz中断，每次500ms时钟
.EXTERNAL   _TimeChangeCount;  //计时
.text
.public 
_IRQ3: 
	push r1,r5 to [sp]
	r1 = 0x0380;           //按键唤醒0000，0011，1000，0000
    [P_INT_Clear] = r1;
	pop	r1,r5 from [sp];
	reti;
	

//--------2Hz中断------//
_IRQ5: 
	push r1,r5 to [sp]
	r1 = 0x0008;          //0000，0000，0000，1000
L_IRQ5_2Hz:
	r1 = 0xFFFF;          //万年历时间
    [Per500msSet] = r1;
    r1 = [_TimeCount];    //计时
	r1 += 1;
	[_TimeCount] = r1;
    r1=0x0004				//0000，0000，0000，0100
    [P_INT_Clear] = r1;
	pop	r1,r5 from [sp];
	reti;
.endp