isr.asm

12864接口电路 12864接口电路12864接口电路 12864接口电路

//中断程序（ISR.ASM）
.text
.include	hardware.inc
.include	S480.inc
.include	Resource.inc
.public	_FIQ;
_FIQ:
	PUSH	r1,r4 to [sp];             		  //压栈保护
	r1=0x2000;                            
	test r1,[P_INT_Ctrl];            		  //判断是不是FIQ_TMA中断源
	jnz L_FIQ_TimerA;               		  //是，则转
	r1=0x0800;                          
	test r1,[P_INT_Ctrl];             		  //否则，判断是不是FIQ_TMB中断源
	jnz L_FIQ_TimerB;                 	  //是，则转
L_FIQ_PWM:                           
	r1=C_FIQ_PWM;                     
	[P_INT_Clear]=r1;                 	  //清除P_INT_Clear单元
	POP R1,R4 from[sp];
	reti;
L_FIQ_TimerA:
	[P_INT_Clear]=r1;
	call F_FIQ_Service_SACM_S480;     	  //调用函数，完成播放
	pop r1,r4 from [sp];
	reti;
L_FIQ_TimerB:
	[P_INT_Clear]=r1;
	pop r1,r4 from [sp];
	reti;