dac 三角波.txt

用51单片机控制dac0832产生三角波

#include <reg51.h>
#include <absacc.h>
#include <intrins.h>
#define uchar unsigned char
#define DAC    XBYTE[0x7fff]       //p2.7接DA片选信号脚

uchar code LED[11]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

sbit p20=P2^0;
sbit p21=P2^1;
sbit p22=P2^2;
sbit p23=P2^3;
sbit p24=P2^4;
sbit p26=P2^6;
sbit p34=P3^4;
sbit p37=P3^7;  

uchar V=0;    //输出电压变量

void single(void) interrupt 1
{
TH0=0x70;     //产生周期T为10S的三角波信号[定时10 ms]
TL0=0x00;
TR0=1;
if(V<255)
DAC=V++;
else 
{
DAC=V;
V=0;
}

}



main()
{
p26=0;
p20=0;
p21=0;
p22=0;
p23=0;

IE=0x82;      //选用定时计数器T0
TMOD=0x01;    //16位工作方式
TH0=0x70;
TL0=0x00;
TR0=1;
while(1)
P0=V;

}