tdawave.asm

MCS96的源程序。用来给96单片机使用

D_APORT EQU     0E000H          ;0832口地址
AL      EQU     20H
AH      EQU     21H
BX      EQU     22H
CX      EQU     24H
DX      EQU     26H

        ORG     2080H
        LD      SP,#60H
;-------D_A输出产生锯齿波-------

WAVE1:  LD      DX,#100H
        LDB     AL,#00H
W1LOOP: STB     AL,D_APORT      ;启动D/A
        LDB     AH,#20H         ;延时
        DJNZ    AH,$
        INCB    AL
        JNC     W1LOOP
        DJNZ    DX,W1LOOP
;-------D_A输出产生三角波-------
WAVE2:  LD      DX,#80H
        LDB     AL,#00H
W2LOOP: STB     AL,D_APORT      ;启动A/D
        LDB     AH,#20H         ;延时
        DJNZ    AH,$
        INCB    AL              ;三角波上升沿
        INCB    AL
        JNC     W2LOOP
        LDB     AL,#0FEH        ;三角波最高点
W2LOOP1:STB     AL,D_APORT      ;启动A/D
        LDB     AH,#20H         ;延时
        DJNZ    AH,$
        DECB    AL              ;三角波下降沿
        DJNZ    AL,W2LOOP1
        DJNZ    DX,W2LOOP
;-------D_A输出产生正弦波-------
        LD      DX,#200H
WAVE3:  LD      BX,#SIN
        LD      CX,#40H
W3LOOP: LDB     AL,[BX]+        ;读SIN表格
        STB     AL,D_APORT      ;启动A/D
        LDB     AH,#80H         ;延时
        DJNZ    AH,$
        DJNZ    CX,W3LOOP
        DJNZ    DX,WAVE3
        SJMP    WAVE1
;----------SIN波形数据---------
SIN:    DB       80H, 8CH, 98H,0A5H,0B0H,0BCH,0C7H,0D1H
        DB      0DAH,0E2H,0EAH,0F0H,0F6H,0FAH,0FDH,0FFH
        DB      0FFH,0FDH,0FAH,0F6H,0F0H,0EAH,0E2H,0DAH
        DB      0D1H,0C7H,0BCH,0B0H,0A5H, 98H, 8CH, 80H
        DB       7FH, 73H, 67H, 5AH, 4FH, 43H, 38H, 2EH
        DB       25H, 1DH, 15H, 0FH, 09H, 05H, 02H, 00H
        DB       00H, 02H, 05H, 09H, 0FH, 15H, 1DH, 25H
        DB       2EH, 38H, 43H, 4FH, 5AH, 67H, 73H, 7FH
        END