da转化输出不同波形8086和DAC0832的Proteus仿真

DATAS SEGMENT
    ;此处输入数据段代码 
     DAC0832 equ 0C400h 
     IOY1 equ 0C480h
     b8255 equ IOY1+01H*4
     m8255 equ IOY1+03H*4
     buffer dw   127,133,139,145,151,158,164,170,175,181;正弦波
            dw   187,192,198,203,208,212,217,221,225,229
            dw   233,236,239,242,245,247,249,251,252,253
            dw   254,254,255,254,254,253,252,251,249,247
            dw   245,242,239,236,233,229,225,221,217,212
            dw   208,203,198,192,187,181,175,170,164,158
            dw   151,145,139,133,127,120,114,108,102,95
            dw   89,83,78,72,66,61,55,50,45,41
            dw   36,32,28,24,20,17,14,11,8,6
            dw   4,2,1,0,0,0,0,0,0,0
            dw   1,2,4,6,8,11,14,17,20,24
            dw   28,32,36,41,45,50,55,61,66,72
            dw   78,83,89,95,102,108,114,120 
DATAS ENDS

STACKS SEGMENT
    ;此处输入堆栈段代码
STACKS ENDS

CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
    MOV AX,DATAS
    MOV DS,AX
    mov di,offset buffer
    mov dx,m8255
    mov al,82h;B口输入
    out dx,al
    ;判断输出信号的类型
Choose:
    mov dx,b8255;输入信号
	in al,dx
	cmp al,0FEh
	je Sim_begin
	cmp al,0FDh
	je Fangbo
	cmp al,0FBh
	je tri_begin
	cmp al,0f7h
	je sin_begin
	jmp choose
    ;此处输入代码段代码
    ;锯齿波
Sim_Begin:
    mov al,0ffh
SIM:
	mov dx,DAC0832
	out dx,al
	dec al
	jnz SIM
	jmp choose
	;方波
Fangbo:
	mov dx,dac0832
	mov cx,0fffh
high_Fangbo:
	mov al,00h
	out dx,al
	loop high_fangbo
	mov cx,0fffh
Low_Fangbo:
	mov al,0ffh
	out dx,al
	loop low_fangbo
	jmp choose
	;三角波
tri_begin:
	mov al,01h
	mov dx,dac0832
up:
	inc al
	out dx,al
	cmp al,0ffh
	jnz up
down:
	dec al
	out dx,al
	cmp al,01h
	jnz down
	jmp choose
	;正弦波
sin_begin:
	mov bl,00h
	mov dx,dac0832
	mov di,00h
sin_show:
	mov al,[di]
	out dx,al
	add di,2
	inc bl
	cmp bl,128
	jnz sin_show
	jmp choose
	
quit:
    MOV AH,4CH
    INT 21H
CODES ENDS
    END START

可以输出不同的波形：
1.锯齿波：

2.方波：

3.三角波：

4.正弦波：

运行时使能信号参考。