.mmregs
   		.def 		main
   		.def 		ad50_data 
spsa0  	.set  	38h   			; 緩沖串口0子地址地址寄存器
spcd0  	.set  	39h  			; 緩沖串口0子地址數(shù)據(jù)寄存器
dxr10  	.set  	23h   			; 緩沖串口0數(shù)據(jù)1發(fā)送寄存器
drr10  	.set  	21h  			; 緩沖串口0數(shù)據(jù)1接收寄存器

spcr10  	.set 		00h				; 設(shè)置緩沖串口0的所有寄存器的子地址
spcr20  	.set 		01h
rcr10   	.set 		02h
rcr20   	.set 		03h
xcr10   	.set 		04h
xcr20   	.set 		05h
srgr10  	.set 		06h
srgr20  	.set 		07h
mcr10  	.set 		08h
mcr20  	.set 		09h
rcera0  	.set 		0ah
rcerb0  	.set 		0bh
xcera0  	.set 		0ch
xcerb0  	.set 		0dh
pcr0    	.set 		0eh   
     	 
k_iptr  	.set 		000111000b<<07	; 設(shè)置中斷向量表的地址，指向0x1C00
k_temp  	.set 		1111111b    
data_dp   .usect "filter_vars",0         
   
main:
   STM  		4000h,sp				; 設(shè)置堆棧指針
   LD   		#0h,dp				; 設(shè)置數(shù)據(jù)頁指針

   LDM     	pmst,a				; 改變中斷向量表首地址
   AND     	#k_temp,a
   OR      	#k_iptr,a
   STL     	a,ar6
   MVDM   	ar6,pmst
   NOP
   NOP
   NOP
   STM     	#0ffffh,tcr				; 關(guān)閉定時(shí)器
   STM     	#05h,prd				; 設(shè)置定時(shí)器周期寄存器
   STM     	#08e0h,tcr				; 設(shè)置定時(shí)器控制寄存器

   SSBX    	intm					; 關(guān)閉中斷
   SSBX    	sxm
   ST      	#2491h,swwsr			; 設(shè)置外設(shè)等待時(shí)間寄存器
   NOP
   NOP
   NOP
   SSBX    	xf					; 設(shè)置XF引腳為高
   NOP							; 等待硬件完成高電平檢測
   NOP
   NOP
   NOP
dss_init:							; 設(shè)置DSP的緩沖串口0的所有寄存器
   RSBX    cpl 
   NOP
   NOP
   STM     spcr10,spsa0
   NOP
   STM     06h,spcd0 
   NOP
   STM     spcr20,spsa0
   NOP
   STM     200h,spcd0 
   NOP
   STM     pcr0,spsa0
   NOP
   STM     0eh,spcd0 
   NOP
   STM     rcr10,spsa0
   NOP
   STM     40h,spcd0
   NOP
   STM     rcr20,spsa0
   NOP
   STM     4h,spcd0
   NOP
   STM     xcr10,spsa0
   NOP
   STM     40h,spcd0
   NOP
   STM     xcr20,spsa0
   NOP
   STM     4h,spcd0
   NOP
   
   LD      #64h,a
   RPT     #50
   NOP
   
   STM     spcr10,spsa0
   NOP
   STM     07h,spcd0
   NOP
   STM     spcr20,spsa0
   NOP
   STM     201h,spcd0				; 打開緩沖串口0
   NOP
   RPT     #50
   NOP

aic_init:							; 初始化AD50
   STM    	0h,imr				; 設(shè)置中斷寄存器
   ORM    	10h,imr
   STM     	0ffffh,ifr				; 清上電復(fù)位可能影響的中斷使能
   PORTW  	08h,02h
   NOP
   NOP
   NOP
   CALL    	wait					; 延時(shí)一段時(shí)間，等待AD初始化
waitr$14$:
   STM     	0h,spsa0
   NOP
   LDM     	spcd0,a
   NOP
   NOP
   NOP
   AND    	#2h,0,a,a			
   BC     	waitr$14$,aeq			; 判斷是否可以寫數(shù)據(jù)到AD50
   STM    	#101h,dxr10     		; 設(shè)置AD50的控制寄存器1
   CALL    	wait   
   STM     	0ffffh,ifr

waitr$17$:					
   STM   	0h,spsa0
   NOP
   LDM    	spcd0,a 
   NOP
   NOP
   NOP
   AND    	#2h,0,a,a
   BC     	waitr$17$,aeq			; 判斷是否可以寫數(shù)據(jù)到AD50
   STM    	#210h,dxr10			; 設(shè)置AD50的控制寄存器2
   CALL    	wait
   STM    	0ffffh,ifr

waitr$22$:					
   STM    	0h,spsa0
   NOP
   LDM    	spcd0,a 
   NOP
   NOP
   NOP
   AND   	#2h,0,a,a
   BC    	waitr$22$,aeq			; 判斷是否可以寫數(shù)據(jù)到AD50
   STM    	#430h,dxr10      		; 設(shè)置20kHz采樣頻率
   STM    	#440h,dxr10      		; 設(shè)置15kHz采樣頻率
   STM    	#400h,dxr10       		; 設(shè)置8kHz采樣頻率；設(shè)置AD50的控制寄存器4
   CALL    	wait
   STM     	0ffffh,ifr

waitr$24$:				
   STM    	0h,spsa0
   NOP
   LDM    	spcd0,a 
   NOP
   NOP
   NOP
   AND   	#2h,0,a,a
   BC     	waitr$24$,aeq   		; 判斷是否可以寫數(shù)據(jù)到AD50
   STM    	#301h,dxr10			; 設(shè)置AD50的控制寄存器3
   CALL    	wait 

   STM    	#1,ar0
   NOP
   STM  		0ffffh,ifr
   NOP
   RSBX    	xf
   NOP   
   NOP
   NOP
   LDM   	drr10,a				; 清空緩沖串口的數(shù)據(jù)接收寄存器
   NOP							; 避免讀入可能復(fù)位影響的接收數(shù)據(jù)
   STM     	0h,imr
   ORM     	10h,imr				; 設(shè)置中斷標(biāo)志寄存器
   NOP
   NOP 
   RSBX   	intm					; 打開總中斷
wait_data:                        		; 主程序，空操作，等待采樣數(shù)據(jù)到來
   NOP
   NOP
   NOP
   NOP
   B     	wait_data
   NOP
   NOP
   NOP
   
wait:                       			; 延時(shí)子程序
   RPT    	#8048				; 可以通過重復(fù)指令來改變延時(shí)的時(shí)間
   NOP
   NOP
   NOP
   RET  							; 延時(shí)子程序返回
   NOP
   NOP
   NOP   
   
ad50_data:     						; AD50數(shù)據(jù)接收中斷服務(wù)程序，讀取AD的數(shù)據(jù)
   LDM   	drr10,a      			; 將緩沖串口要輸入到數(shù)據(jù)寄存器的內(nèi)容轉(zhuǎn)送到累加器a中
   CALL  	signal_processing		; 調(diào)用信號(hào)處理子程序
   NOP
   NOP 
   NOP
   RETE							; 中斷返回
   NOP
   NOP
   STL    	a,dxr10				; 數(shù)據(jù)從累加器a中輸出到AD50
   NOP 
   NOP
   
signal_processing					; 語音信號(hào)處理子程序
   NOP							; 在此可以加入語音信號(hào)處理
   RET 							; 語音信號(hào)處理子程序返回