isr.asm

mp3.rar

//========================================================
//	文件名称：	isr.asm
//	功能描述：	将解码队列的语音资源送到DAC进行播放
//	维护记录：	2005-09-12	v1.0
//========================================================

.INCLUDE a2000.inc
.INCLUDE hardware.inc

.TEXT
.PUBLIC _FIQ
_FIQ:
	push r1,r5 to [sp]
	r1 = C_FIQ_TMA					//判断是否是定时器A的FIQ中断？
	test r1,[P_INT_Ctrl]
	jnz L_FIQ_TimerA
	r1 = C_FIQ_TMB					//判断是否是定时器B的FIQ中断？
	test r1,[P_INT_Ctrl]
	jnz L_FIQ_TimerB
L_FIQ_PWM:							//Fosc/1024中断
	r1 = C_FIQ_PWM
	[P_INT_Clear] = r1
	pop r1,r5 from [sp]
	reti
L_FIQ_TimerA:						//TimerA的FIQ中断
	[P_INT_Clear] = r1				//清中断标志位
	
	call F_FIQ_Service_SACM_A2000	//调用音频中断服务程序A2000的
	
	pop r1,r5 from [sp]
	reti
L_FIQ_TimerB:
	[P_INT_Clear] = r1
	pop r1,r5 from [sp]
	reti