ad1.txt

中断方式的A/D采集系统使用ADC0809的通道0

CODE SEGMENT

ASSUME CS:CODE,DS:DATA,ES:DATA,SS:STACK
ADC PROC FAR 
    MOV AX,DATA
    MOV DS,AX
    MOV ES,AX
    MOV AX,STACK
    MOV SS,AX

INTPORT1 EQU 0020H;中断号
INTPORT2 EQU 0021H
CONTPORT1 EUQ 0060H;数据口
DATAPORT1 EQU 0061H;状态口

CONTPORT EQU 00DFH;8279命令口
DATAPORT EQU 00DEH;8279数据口
DATA1 EQU 0500H
      ORG 1000H
      JMP START
START:
      CALL LEDDISP
      MOV AX,0H
      MOV DX,AX
      CALL WRINTVER
      MOV AL,13H   ;8259初始化ICW1
      OUT INTPORT1,AL
      MOV AL,08H   ;8259初始化ICW2
      OUT INTPORT2,AL
      MOV AL,01H   ;初始化ICW4
      OUT INTPORT2,AL

      MOV AL,0EH
      OUT DX,AL
      MOV AL,0CH
      OUT DX,AL


      MOV AL,0F7H  ;开IR3中断
      OUT INTPORT2,AL
      STI          ;开CUP的中断

WATING:JMP WATING
WRINTVER:MOV AX,0H
         MOV ES,AX
         MOV DI,002CH
         LEA AX,INTIRQ3
         STOSW
         MOV AX,CS
         STOSW
         RET
    
         MOV CX,100
         MOV DX,CONTPORT1
         MOV AL,00H
         OUT DX,AL

INTIRQ3:PUSH AX
        PUSH DX
        PUSH DI
        
        CLI
        MOV DX,CONTPORT1
        MOV AL,0DH
        OUT DX,AL
        NOP
        NOP
        MOV AL,0CH
        OUT DX,AL
       
        MOV DX,CONTPORT1
        IN AL,DX
        NOP

        MOV DI,PRT
        MOV [DI],AL
        INC DI
        MOV PRT,DI
 
    //  MOV AL,90H
    //  MOV DX,CONTPORT
     // IN AL,DX

        MOV AL,20H
        MOV DX,INTPORT1
        OUT DX,AL
        STI
        POP DI
        POP DX
        POP AX
        IRET
MAIN:   MOV DX,DATAPORT1
        MOV AL,0FH
        OUT DX,AL
        NOP
        NOP
        MOV AL,0EH
        OUT DX,AL
      
        STI
        HLT

        DEC CX
        JNZ MAIN
        CLI
        RET


leddisp: mov al,90h
mov dx,contport
out dx,al
mov byte ptr ds:[0600h],00
led1:cmp byte ptr ds:[0600h],07h
ja led2
mov bl,ds:[0600h]
mov bh,0h
mov al,ds:[bx+data]
mov dx,dataport
out dx,al
add byte ptr ds:[0600h],01h
jnz led1
led2:ret
code ends
end start