代码收藏家技术教程 2022-12-30

单片机——C51实验含Proteus仿真（AD转换器（数字电压表），DA转换器（波形发生器））

文章仅为本人学习记录，如有引用部分会另加说明引用出处

代码部分

分为两部分：AD转换器实现数字电压表，DA转换器实现波形发生器（在仿真部分详细说明）

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char

sbit D1=P1^0;		//灯组
sbit key1=P3^4;		//独立键盘P3^4//控制PWM波的频率
sbit key2=P3^5;		//独立键盘P3^5//控制PWM波的频率
sbit CS_DA=P2^0;	//DA转换器片选端，低电平有效
sbit WR_DA=P2^1;	//DA转换器输入寄存器写信号，低电平有效
sbit LCD_RS=P2^5;	//LCD1206数据（高）指令（低）选择端
sbit LCD_RW=P2^6;	//LCD1206读（高）写（低）信号端
sbit LCD_E=P2^7;	//LCD1206使能端（下降沿执行命令）
sbit START=P2^2;	//AD转换器start/ale控制端(下降沿开始工作)
sbit EOC=P2^3;		//AD转换器EOC端（开始工作时为低，结束时为高）
sbit OE=P2^4;		//AD转换器OE端（为高时单片机读取数据）

uchar code sin[]={//正弦表
0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,
0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,
0xc2,0xc5,0xc7,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,
0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,
0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,
0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,
0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,
0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,
0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,
0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,0x90,
0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,
0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,
0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,
0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,
0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,
0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,
0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,
0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,
0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,
0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,
0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,
0x80
};

int num=10;
int v;
uchar t[]={"0123456789"};

void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=120;y>0;y--);
}

void writedata(uchar y)//LCD写数据
{
	LCD_RS=1;
	LCD_RW=0;
	LCD_E=0;
	P0=y;
	LCD_E=1;
	delay(5);
	LCD_E=0;	
}

void writecom(uchar x)//LCD写命令
{
	LCD_RS=0;
	LCD_RW=0;
	LCD_E=0;
	P0=x;
	LCD_E=1;
	delay(5);
	LCD_E=0;	
}

void LCD_init()//LCD初始化
{
	writecom(0x38);//设置16*2显示，5*7点阵，8位数据口
	writecom(0x0c);//设置开显示，不显示光标
	writecom(0x06);//写一个字符后地址指针加1
	writecom(0x01);//显示清零，数据指针清零
}

void display()//LCD电压显示
{
	uchar temp0,temp1,temp2;
	v=v*100/51;//5V电压下的分辨率255/5=51
	temp0=v/100;
	temp1=(v%100)/10;
	temp2=v%10;
	writecom(0x80);//字符显示的起始地址
	delay(5);
	writedata(t[temp0]);
	delay(5);
	writedata('.');
	delay(5);
	writedata(t[temp1]);
	delay(5);
	writedata(t[temp2]);
	delay(5);
	writedata('V');
	delay(5);
}


void DA_init(uchar x)//波形发生器初始化
{
	CS_DA=x;
	WR_DA=x;	
}

void key()//键盘检测调节PWM波
{
	if(key1==0)
	{
		delay(5);
		if(key1==0)
			num+=5;
		while(!key1);
	}

	if(key2==0)
	{
		delay(5);
		if(key2==0)
			num-=5;
		while(!key2);
	}
}

void PWM()//PWM波
{
	P0=0;
	delay(50);
	P0=255;
	delay(num);
}

void triangular()//三角波
{
	uint i=0;
	for(i=0;i<255;i++)
	{	
		P0=i;
	}
	for(i=255;i>0;i--)
	{	
		P0=i;
	}
}

void ssin()//正弦波
{
	uint i=0;
	for(i=0;i<=255;i++)
	{
		P0=sin[i];
	}
}


void ADC()//AD工作时序
{
	START=0;
	START=1;
	delay(5);
	START=0;//下降沿开始工作，EOC置0
	while(!EOC);//转换完成时EOC置1
	OE=1;//OE置1时，允许单片机读取AD的数据
	v=P1;//高位先接收
	OE=0;		
}

void main()
{	
	DA_init(0);
	//LCD_init();
	while(1)
	{
		//ADC();
		//display();
		key();
		PWM();
		//triangular();
		//ssin();
	}			
}