基于51单片机的三角波信号发生器

ID:857562 · 发表于 2020-12-9 17:16

#include<reg51.h>
#include<absacc.h>
#define DAC0832 XBYTE[0x7fff]
sbit a=P3^0;
sbit b=P3^1;
sbit c=P3^2;
sbit e=P3^3;
unsigned char code juxing[64]={255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
unsigned char code sanjiao[64]={0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168,176,184,192,200,208,216,224,232,240,248,
248,240,232,224,216,208,200,192,184,176,168,160,152,144,136,128,120,112,104,96,88,80,72,64,56,48,40,32,24,16,8,0,};
void delay(unsigned int x)
{
unsigned char i;
while(x--)
for(i=0;i<=140;i++);
}
void square(void)
{
unsigned char i;
for(i=0;i<64;i++)
DAC0832=juxing[i];
}
void sanjiaobo()
{
unsigned char i;
for(i=0;i<64;i++)
{
DAC0832=sanjiao[i];
}
}
void juchibo()
{
int i;
unsigned char code sin[64]={135,145,158,167,176,188,199,209,218,226,234,240,245,249,252,254,
254,253,251,247,243,237,230,222,213,204,193,182,170,158,146,133,
121,108,96,84,72,61,50,41,32,24,17,11,7,3,1,0,0,2,5,9,14,20,28,
36,45,55,66,78,90,102,114,128
};
for(i=0;i<64;i++)
{
DAC0832=sin[i];
}
}
void main(void)
{
e=0;
while(1)
{
switch(P1)
{
case 0xfe:
delay(10);
while(P1==0XFF)
{square();}break;
case 0xfd:
delay(10);
while(P1==0XFF)
{sanjiaobo();} break;
case 0xfb:
delay(10);
while(P1==0XFF)
{juchibo();}break;
default:break;
}
}
}

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上个月课上做的实验，想来分享一下

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