微機(jī)原理試驗(yàn)程序

1、硬件實(shí)驗(yàn)七D/A轉(zhuǎn)換實(shí)驗(yàn)（2鋸齒波；注意:進(jìn)行本實(shí)驗(yàn)前，請先裝載運(yùn)行D/A 0V輸出（調(diào)基準(zhǔn)電壓程序 Asm88da_0v.asm；使D/A輸出端“ AOUT ”輸出電壓為0V ,再進(jìn)行本實(shí)驗(yàn)。CODE SEGMENTASSUME CS:CODE,DS:CODE,ES:CODEORG 33FOHDAPORT EQU OFFEOHH7: MOV DX,DAPORTMOV AL,00HP7: OUT DX,ALINC ALJMP P7CODE ENDSEND H7串行通信CODE SEGMENTASSUME CS:CODE,DS:CODE,ES:CODEORG 35COH ;TX=RXHll: J

2、MP STARTZ8251 EQU 0FFE1HD8251 EQU OFFEOHCOM_MOD EQU 04EHCOM_COM EQU 25HZXK EQU OFFDCHZWK EQU OFFDDHLED DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90HDB 88H,83H,0C6H,0A 1 H,86H,8EH,0FFH,0CH,0DEH,0F3HBUF DB ?,?,?,?,?,?START: MOV BX.4000HMOV ALJBXCMP AL,00HJNZ SROSR8251: MOV DX,Z8251MOV AL,COM_MODOUT

3、DX,ALMOV AL,COM_COM OUT DX,ALMOV AL, 10MOV DI,4000H ABC: MOV DI,ALINC ALINC BXCMP AL,26JNE ABCSRO: CALL WPMOV SI,4000H MOV DL5000H MOV CX,0010H SRI: MOV AH,SICALL SENDCALL RXMOV DI,AH INC SIINC DILOOP SRISR2: CALL DISJMP SR2RX: MOV DX,Z8251 RX1: IN AL,DXTEST AL,02HJZ RX1MOV DX,D8251 IN AL,DXMOV AH,A

4、LRETWP: MOV BUFJ1H MOV BUF+1J0H MOV BUF+2J0H MOV BUF+3JOHMOV BUF+4J0H MOV BUF+5J0H RETSEND: MOV DX.Z8251 Wl: IN ALQXTEST AL,01HJZW1MOV DX,D8251MOV AL,AHOUT DX,ALRETDIS: MOV CL,20HMOV BX,OFFSET BUFDIS1: MOV AL,BXPUSH BXMOV BXQFFSET LEDXLATPOPBXMOV DX,ZXKOUT DX,ALMOV AL,CLMOV DX,ZWKOUT DX,ALPUSH CXMOV

5、 CX,0100HDELAY: LOOP $POP CXCMPCL,01HJZ EXITINC BXSHRCLJJMPDIS1EXIT: MOV AL,00HMOV DX,ZWKOUT DX,ALRETCODE ENDSEND Hl 1LED顯示學(xué)號(hào)CODE SEGMENTASSUME CS:CODE,DS:CODE,ES:CODE ORG 1000HLED8: MOV CL.20HMOV SI,0MOV BX,OFFSET LEDLO: MOV AL,BUFSIXLATMOV DX,0FFDCHOUT DX,ALMOV AL,CLMOV DX,0FFDDHOUT DX,ALMOV DX,04

6、0HKI: DEC DXJNZK1INC SISHRCLJCMP CL,0JNZ LOJMP LED8LED DB 0C0H,0F9H,0A4H,0B0H,099H,092H,082H,0F8H,080H,090HBUF DB 13,2,3,0,6CODE ENDSEND LED8硬件實(shí)驗(yàn)八8259單級(jí)中斷控制器實(shí)驗(yàn)CODE SEGMENTASSUME CS:CODE,DS:CODE,ES:CODEORG 3400HH& JMP P8259ZXK EQU OFFDCHZWK EQU OFFDDHLED DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80

7、H,90HDB 88H,83H,0C6H,0A 1 H,86H,8EH,0FFH,0CH,0DEH,0F3HPortO EQU OFFEOHPortl EQU 0FFE1HP8259: CLI;關(guān)中斷CALL WP;初始化顯示“P.”MOV AX,OFFSET INT8259MOV BX,003CH ; ir7x4=3ch 偏移地址MOV BX,AXMOV BX,003EH ;求端地址MOV AX,0000HMOV BX,AXCALL FOR8259mov si,OOOOhSTI;開中斷CON8: CALL DISJMPCON8INT8259:cliMOV BXQFFSET BUFMOV BY

8、TE PTR BX+SI,07HINC SICMP SL0007HJZ X59XX59: MOV AL,20HMOV DX,PortOOUT DX,ALmov cx,OO5Oh xxx59: push ex call dispop ex loop xxx59 pop exmov ex,3438hpush exSTIIRETX59: MOV SI.0000HCALL WPJMP XX59FOR8259:MOV AL,13HMOV DX,PortO ;初始化 icwl 00010011 OUT DX,ALMOV AL,08HMOV DX,Poi1l ;初始化 icw2 00001xxx OUT D

9、X,ALMOV AL,09HOUT DX,AL ;初始化 icw4 00001001 MOV AL,7FH ;IRQ7 屏蔽除 ir07 以外的中斷 OUT DX,ALRETWP: MOV BUFJIH;初始化顯示“ P. ”MOV BUF+IJOHMOV BUF+2J0HMOV BUF+3J0HMOV BUF+4J0HMOV BUF+5J0HRETDIS: MOV CL,20H MOV BX,OFFSET BUF DIS1: MOV AL,BX PUSH BX MOV BX,OFFSET LED XLAT POP BX MOV DX,ZXK OUT DX,AL MOV AL,CL MOV DX,ZWK OUT DX,AL PU