微機(jī)原理與接口實(shí)驗(yàn)報(bào)告_步進(jìn)機(jī)_匯編(編輯修改稿)
2025-09-10 23:09 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 TEST AL,80H JNZ NEXT MOV DX,A8255 MOV AL,00H ；停止步進(jìn)電機(jī) OUT DX,AL JMP NEW NEXT: MOV DX,A8255AGAIN: MOV AL,BL OUT DX,AL CALL DELAY ROL BL,1 JMP NEW EXIT: MOV AX,4C00H INT 21H MY_PROC ENDPDELAY PROC NEAR 。延時(shí)程序 PUSH CX MOV BP,300HD1: MOV CX,1D2: LOOP D2 DEC BP JNZ D1 POP CX RETDELAY ENDp MY_CODE ENDS END START五、 程序清單：P55b equ 201h 。8255B口輸出P55C equ 202h 。8255C口輸入P55CTRL equ 203h 。8255控制口DATA SEGMENTBUF db 0DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART: MOV DX,P55CTRL MOV AL,99H OUT DX,AL 。8255C輸入，B輸出
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