isr.asm

这是基于凌阳单片机设计的交通灯

.text

//.define     P_INT_Ctrl   0x7010;				//2006 05 26 Edit by xinqiang
//.define     P_INT_Clear  0x7011;

.include	hardware.inc
.include	A2000.inc
.include	Resource.inc


.public	_FIQ;
_FIQ:
	PUSH	r1,r4 to [sp];
	r1=0x2000;                    //测试是否为FIQ_TMA中断;
	test r1,[P_INT_Ctrl];
	jnz L_FIQ_TimerA;             //若是，则转到L_FIQ_TimerA处;
	r1=0x0800;                    //测试是否为FIQ_TB中断;
	test r1,[P_INT_Ctrl];
	jnz L_FIQ_TimerB;             //若是，则转到L_FIQ_TimerB处;
L_FIQ_PWM:                        //音频输出PWM计数器溢出信号PWM_INT;
	r1=C_FIQ_PWM;
	[P_INT_Clear]=r1;
	POP R1,R4 from[sp];
	reti;
L_FIQ_TimerA:
	[P_INT_Clear]=r1;
	call F_FIQ_Service_SACM_A2000;
	pop r1,r4 from [sp];
	reti;
L_FIQ_TimerB:
	[P_INT_Clear]=r1;
	pop r1,r4 from [sp];
	reti;