//这儿咱们选用单缓冲方法，单片机每隔1s钟分别向DAC0832送出
//3FH,7FH,F0H,0FFH,00H五个个数据的输出电压循环发生变化。
//此程序有必要把电路图设置好，此DA各引脚都已设置在在作业状况
ORG0000H
AJMPMAIN
ORG0030H
MAIN:
MOVA,#3FH
MOVP0,A
SETBP3.6;WR1下降沿进行转化
CALLDELAY
CLRP3.6
CALLDELAY
MOVA,#7FH
MOVP0,A
SETBP3.6
CALLDELAY
CLRP3.6
CALLDELAY
MOVA,#0F0H
MOVP0,A
SETBP3.6
CALLDELAY
CLRP3.6
CALLDELAY
MOVA,#0FFH
MOVP0,A
SETBP3.6
CALLDELAY
CLRP3.6
CALLDELAY
MOVA,#00H
MOVP0,A
SETBP3.6
CALLDELAY
CLRP3.6
CALLDELAY
AJMPMAIN
DELAY:;延时函数
MOVR4,#5
L3:MOVR5,#100
L2:MOVR6,#250
DJNZR6,$
NOP
NOP
DJNZR5,L2
DJNZR4,L3
RET
END
