现代计算机接口实验 （四）0832实验

1.2 延时法，32 次产生锯齿波，最高点-5V

;0832 Ua-示波器观察延时法
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

;0832cs280H~287H
DATA SEGMENT
DATA ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA
START:
  MOV AX, DATA
  MOV DS, AX
  
  MOV AL, 00H
AGAIN:
  MOV DX, 280H
  OUT DX, AL
  CALL DELAY
  ADD AL, 08H;从00000000-00001000-0001100……11111000一共32次，后面又回到00H
  JMP AGAIN
  
  MOV AH, 4CH
  INT 21H

DELAY PROC NEAR
  PUSH CX
  MOV CX, 0FFFFH
 L1: 
   LOOP L1
   MOV CX, 0FFFFH
L2:  
   LOOP L2
   POP CX
   RET
DELAY ENDP

CODE ENDS
END START 

2.延时法，产生方波，最高点-5V

;0832 Ua-示波器观察延时法
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5 

DATA SEGMENT
DATA ENDS
STACK1 SEGMENT PARA STACK
 DW 20H DUP(0)
STACK1 ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA, SS:STACK1
START:
   MOV AX, DATA
   MOV DS, AX
   
   MOV AL, 5H
  
AGAIN:
   MOV DX, 280H;端口号
   OUT DX, AL
   CALL DELAY
   NEG AL;取相反数
   JMP AGAIN
   
   MOV AH, 4CH; 退出到 DOS，即结束程序运行
   INT 21H

DELAY PROC NEAR
     PUSH CX
     MOV CX, 0FFFFH
     L1: 
     LOOP  L1
     MOV CX, 0FFFFH
     L2:  
     LOOP L2
     POP CX
    RET
DELAY ENDP

CODE ENDS
 END START

3.延时法，16 次产生三角波，最高点-2.5V

;0832 Ua-示波器观察延时法
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5  

 DATA SEGMENT
DATA ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA
START:
  MOV AX, DATA
  MOV DS, AX
  MOV AL, 0H
  
DRAW_ASCEND_LINE: ;画上升的边
    MOV DX, 280H
    OUT DX, AL
    CALL DELAY
    CMP AL, 80H
    JZ DRAW_DESCEND_LINE ;跳转到画下降的边
   
    ADD AL, 08H
    JMP DRAW_ASCEND_LINE

DRAW_DESCEND_LINE: ;画下降的边
    SUB AL, 08H
    MOV DX, 280H
    OUT DX, AL
    CALL DELAY
    CMP AL, 00H
    JZ DRAW_ASCEND_LINE ;跳转到画上升的边
    JMP DRAW_DESCEND_LINE
    
    MOV AH,4CH ;退出到 DOS, 即程序运行结束
    INT 21H

DELAY PROC NEAR
   PUSH CX
   MOV CX, 200H
 L1: 
   LOOP L1
   POP CX
   RET
DELAY ENDP

CODE ENDS
END  START

4.延时法，16 次产生梯形波，最高点-2.5V

;0832 Ua-示波器观察延时法
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5  

DATA SEGMENT
DATA ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA
START:
 MOV AX, DATA
 MOV DS, AX
 
 MOV AL, 00H

DRAW_ASCEND_LINE: ;画上升的腰
 MOV DX, 280H
 OUT DX, AL
 CALL DELAY
 CMP AL, 80H
 JZ  DRAW_HORIZON_LINE ;跳转到画梯形上底

 ADD AL, 08H
 JMP DRAW_ASCEND_LINE
DRAW_HORIZON_LINE: ;画梯形上底
 MOV CX, 10H
AGAIN:
 OUT DX, AL
 CALL DELAY
 LOOP AGAIN

DRAW_DESCEND_LINE: ;画下降的腰
 SUB AL, 08H
 MOV DX, 280H
 OUT DX, AL
 CALL DELAY
 CMP AL, 00H
 JZ DRAW_ASCEND_LINE;跳转到画上升的腰
 JMP DRAW_DESCEND_LINE
 
 MOV AH, 4CH ;退出到 DOS, 即程序结束
 INT 21H

DELAY PROC NEAR
  PUSH CX
  MOV CX, 200H
  L1: 
  LOOP L1
  POP CX
  RET
DELAY ENDP

CODE ENDS
 END START

一、使用硬件【8253+8255】延时方法实现锯齿波、方波、三角波、梯形波。

1.1 16 次产生锯齿波，最高点-5V

;0832 Ua-示波器观察
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

;8253 -288H~28BH;CLK0-2MHZ;GATE0-VCC;OUT0-PC7

 ;8255 -290H~293H;
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5
DATA SEGMENT
 T0_8253 EQU 288H
 KZ_8253 EQU 28BH
 
 PC_8255 EQU 292H
 KZ_8255 EQU 293H
DATA ENDS
STACK1 SEGMENT PARA STACK
 DW 20H DUP(0)
STACK1 ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA, SS:STACK1
START:
   MOV AX, DATA
   MOV DS, AX
 
   CALL Init_8253 
   CALL Init_8255 
   
 MOV AL, 00H
  
AGAIN:
   MOV DX, 280H;端口号
   OUT DX, AL  
    CALL DELAY
   ADD AL, 10H

   JMP AGAIN

   MOV AH, 4CH; 退出到 DOS，即结束程序运行
   INT 21H

DELAY PROC NEAR
     PUSH DX
     PUSH AX

  NEXT1:
     MOV DX,PC_8255
     IN AL,DX
     AND AL,80H;1000 0000B-PC7
     JNZ NEXT1
 NEXT2:
     MOV DX,PC_8255 
     IN AL,DX
     AND AL,80H
     JZ NEXT2

     
     POP AX
     POP DX
    RET
DELAY ENDP
 
Init_8253 PROC
    PUSH DX
    PUSH AX
 
    MOV DX,KZ_8253 
    MOV AL,00100111B ;选择通道0-OUT0，写入高字节，方式3，用BCD码
    OUT DX,AL
    MOV DX,T0_8253
    MOV AL,20H
    OUT DX,AL
    ;8253产生1mS的连续方波*/
    
    POP AX
    POP DX
    RET
Init_8253 ENDP
;初始化8255
Init_8255 PROC
    PUSH DX
    PUSH AX

    MOV DX,KZ_8255 ;8255方式字控制字控制；10011000
    MOV AL,98H
    OUT DX,AL

    POP AX
    POP DX
    RET
Init_8255 ENDP

CODE ENDS
 END START

2. 产生方波，最高点-5V

;0832 Ua-示波器观察
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

;8253 -288H~28BH;CLK0-2MHZ;GATE0-VCC;OUT0-PC7

 ;8255 -290H~293H;
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

DATA SEGMENT
 T0_8253 EQU 288H
 KZ_8253 EQU 28BH
 
 PC_8255 EQU 292H
 KZ_8255 EQU 293H
DATA ENDS
STACK1 SEGMENT PARA STACK
 DW 20H DUP(0)
STACK1 ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA, SS:STACK1
START:
   MOV AX, DATA
   MOV DS, AX
 
   CALL Init_8253 
   CALL Init_8255 
   
MOV AL, 5H
  
AGAIN:
   MOV DX, 280H;端口号
   OUT DX, AL
   CALL DELAY
   NEG AL
   JMP AGAIN

   MOV AH, 4CH; 退出到 DOS，即结束程序运行
   INT 21H

DELAY PROC NEAR
     PUSH DX
     PUSH AX

  NEXT1:
     MOV DX,PC_8255
     IN AL,DX
     AND AL,80H;1000 0000B-PC7
     JNZ NEXT1
 NEXT2:
     MOV DX,PC_8255 
     IN AL,DX
     AND AL,80H
     JZ NEXT2

     
     POP AX
     POP DX
    RET
DELAY ENDP
 
Init_8253 PROC
    PUSH DX
    PUSH AX
 
    MOV DX,KZ_8253 
    MOV AL,00100111B ;选择通道0-OUT0，写入高字节，方式3，用BCD码
    OUT DX,AL
    MOV DX,T0_8253
    MOV AL,20H
    OUT DX,AL
    ;8253产生1mS的连续方波*/
    
    POP AX
    POP DX
    RET
Init_8253 ENDP
;初始化8255
Init_8255 PROC
    PUSH DX
    PUSH AX

    MOV DX,KZ_8255 ;8255方式字控制字控制；10011000
    MOV AL,98H
    OUT DX,AL

    POP AX
    POP DX
    RET
Init_8255 ENDP

CODE ENDS
 END START

3. 16 次产生三角波，最高点-5V

;0832 Ua-示波器观察
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

;8253 -288H~28BH;CLK0-2MHZ;GATE0-VCC;OUT0-PC7

 ;8255 -290H~293H;
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

DATA SEGMENT
 T0_8253 EQU 288H
 KZ_8253 EQU 28BH
 
 PC_8255 EQU 292H
 KZ_8255 EQU 293H
DATA ENDS
STACK1 SEGMENT PARA STACK
 DW 20H DUP(0)
STACK1 ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA, SS:STACK1
START:
   MOV AX, DATA
   MOV DS, AX
 
   CALL Init_8253 
   CALL Init_8255 
   MOV AL, 00H

   DRAW_ASCEND_LINE: ;画上升的边
   
    MOV DX, 280H
    OUT DX, AL 
    CALL DELAY
    CMP AL, 80H
    
    JZ DRAW_DESCEND_LINE ;跳转到画下降的边
   
    ADD AL, 08H
    JMP DRAW_ASCEND_LINE

DRAW_DESCEND_LINE: ;画下降的边
 
    SUB AL, 08H
    MOV DX, 280H
    OUT DX, AL
    CALL DELAY
    CMP AL, 00H

    JZ DRAW_ASCEND_LINE ;跳转到画上升的边
    JMP DRAW_DESCEND_LINE

   MOV AH, 4CH; 退出到 DOS，即结束程序运行
   INT 21H

DELAY PROC NEAR
     PUSH DX
     PUSH AX

  NEXT1:
     MOV DX,PC_8255
     IN AL,DX
     AND AL,80H;1000 0000B-PC7
     JNZ NEXT1
 NEXT2:
     MOV DX,PC_8255 
     IN AL,DX
     AND AL,80H
     JZ NEXT2

     
     POP AX
     POP DX
    RET
DELAY ENDP
 
Init_8253 PROC
    PUSH DX
    PUSH AX
 
    MOV DX,KZ_8253 
    MOV AL,00100111B ;选择通道0-OUT0，写入高字节，方式3，用BCD码
    OUT DX,AL
    MOV DX,T0_8253
    MOV AL,20H
    OUT DX,AL
    ;8253产生1mS的连续方波*/
    
    POP AX
    POP DX
    RET
Init_8253 ENDP
;初始化8255
Init_8255 PROC
    PUSH DX
    PUSH AX

    MOV DX,KZ_8255 ;8255方式字控制字控制；10011000
    MOV AL,98H
    OUT DX,AL

    POP AX
    POP DX
    RET
Init_8255 ENDP

CODE ENDS
 END START

4. 16 次产生梯形波，最高点-5V

;0832 Ua-示波器观察
;0832cs280H~287H
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

;8253 -288H~28BH;CLK0-2MHZ;GATE0-VCC;OUT0-PC7

 ;8255 -290H~293H;
;Ua=-Uxef/256*N;Ub=-Uxef/256*N-5

DATA SEGMENT
 T0_8253 EQU 288H
 KZ_8253 EQU 28BH
 
 PC_8255 EQU 292H
 KZ_8255 EQU 293H
DATA ENDS
STACK1 SEGMENT PARA STACK
 DW 20H DUP(0)
STACK1 ENDS
CODE SEGMENT
 ASSUME CS: CODE, DS:DATA, SS:STACK1
START:
   MOV AX, DATA
   MOV DS, AX
 
   CALL Init_8253 
   CALL Init_8255 
   MOV AL, 00H

 
DRAW_ASCEND_LINE: ;画上升的腰
  
    MOV DX, 280H
    OUT DX, AL
      CALL DELAY
    CMP AL, 80H
    
    JZ  DRAW_HORIZON_LINE ;跳转到画梯形上底

    ADD AL, 08H
    JMP DRAW_ASCEND_LINE
DRAW_HORIZON_LINE: ;画梯形上底
    MOV CX, 10H
 AGAIN:
 
    OUT DX, AL
    CALL DELAY
    LOOP AGAIN

DRAW_DESCEND_LINE: ;画下降的腰
   
   SUB AL, 08H
   MOV DX, 280H
   OUT DX, AL
   CALL DELAY
   CMP AL, 00H
   JZ DRAW_ASCEND_LINE;跳转到画上升的腰
   JMP DRAW_DESCEND_LINE

   MOV AH, 4CH; 退出到 DOS，即结束程序运行
   INT 21H

DELAY PROC NEAR
     PUSH DX
     PUSH AX

  NEXT1:
     MOV DX,PC_8255
     IN AL,DX
     AND AL,80H;1000 0000B-PC7
     JNZ NEXT1
 NEXT2:
     MOV DX,PC_8255 
     IN AL,DX
     AND AL,80H
     JZ NEXT2

     
     POP AX
     POP DX
    RET
DELAY ENDP
 
Init_8253 PROC
    PUSH DX
    PUSH AX
 
    MOV DX,KZ_8253 
    MOV AL,00100111B ;选择通道0-OUT0，写入高字节，方式3，用BCD码
    OUT DX,AL
    MOV DX,T0_8253
    MOV AL,20H
    OUT DX,AL
    ;8253产生1mS的连续方波*/
    
    POP AX
    POP DX
    RET
Init_8253 ENDP
;初始化8255
Init_8255 PROC
    PUSH DX
    PUSH AX

    MOV DX,KZ_8255 ;8255方式字控制字控制；10011000
    MOV AL,98H
    OUT DX,AL

    POP AX
    POP DX
    RET
Init_8255 ENDP

CODE ENDS
 END START