用c51写基于温度补偿的超声波测距系统的代码，传感器用DS18B20和HC-SR04,显示用LC0612

好的，下面是一个基于C51单片机的温度补偿超声波测距系统的示例代码。在这个代码中，我们使用一个DS18B20数字温度传感器来测量环境温度，并使用该温度值来进行超声波测距的温度补偿。同时，我们使用一个HC-SR04超声波传感器来进行距离测量，使用LC0612 OLED模块来显示测量结果。

#include <REGX51.H>
#include <intrins.h>

#define DS18B20 DSPORT=P2^7

sbit DSPORT=P2^0;
sbit TRIG=P2^1;
sbit ECHO=P2^2;
sbit SCL=P1^0;
sbit SDA=P1^1;

unsigned char temp;
unsigned char TH,TL;
unsigned int distance;

unsigned char code ASCII[10][8]={
    {0x7E,0x81,0x81,0x81,0x81,0x81,0x81,0x7E}, //0
    {0x00,0x41,0xFF,0x01,0x00,0x00,0x00,0x00}, //1
    {0x43,0x85,0x89,0x91,0x61,0x00,0x00,0x00}, //2
    {0x42,0x81,0x91,0x91,0x6F,0x00,0x00,0x00}, //3
    {0x0C,0x14,0x24,0x44,0xFF,0x04,0x04,0x00}, //4
    {0xF1,0x91,0x91,0x91,0x8E,0x00,0x00,0x00}, //5
    {0x3E,0x51,0x91,0x91,0x0E,0x00,0x00,0x00}, //6
    {0x80,0x80,0x8F,0x90,0xA0,0xC0,0x00,0x00}, //7
    {0x6E,0x91,0x91,0x91,0x6E,0x00,0x00,0x00}, //8
    {0x70,0x89,0x89,0x8A,0x7C,0x00,0x00,0x00} //9
};

void delay_10us(unsigned char t);
void delay_ms(unsigned int t);
void I2CStart();
void I2CStop();
void I2CACK(bit ack);
bit I2CWrite(unsigned char dat);
unsigned char I2CRead();
bit Ds18b20Init();
void Ds18b20WriteByte(unsigned char dat);
unsigned char Ds18b20ReadByte();
void Ds18b20ChangTemp();
unsigned int GetDistance();
void OLEDWriteCmd(unsigned char cmd);
void OLEDWriteData(unsigned char dat);
void OLEDInit();
void OLEDShowNum(unsigned char x,unsigned char y,unsigned int num);

void main()
{
    OLEDInit();
    while(1)
    {
        TH0=0;
        TL0=0;
        TRIG=0;
        delay_10us(2);
        TRIG=1;
        delay_10us(10);
        TRIG=0;
        while(!ECHO);
        TH=TL0;
        while(ECHO);
        TH-=(unsigned char)110-temp;
        distance=TH*256+TL0;
        distance/=58;

        OLEDShowNum(0,0,distance); //显示距离

        delay_ms(200);
    }
}

void delay_10us(unsigned char t)
{
    while(t--)
    {
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
    }
}

void delay_ms(unsigned int t)
{
    while(t--)
        delay_10us(100);
}

void I2CStart()
{
    SDA=1;
    SCL=1;
    SDA=0;
    SCL=0;
}

void I2CStop()
{
    SDA=0;
    SCL=1;
    SDA=1;
}

bit I2CWrite(unsigned char dat)
{
    unsigned char i;
    bit ack;
    for(i=0;i<8;i++)
    {
        SDA=dat&0x80;
        SCL=1;
        _nop_();
        _nop_();
        SCL=0;
        dat<<=1;
    }
    SDA=1;
    SCL=1;
    ack=SDA;
    SCL=0;
    return ack;
}

unsigned char I2CRead()
{
    unsigned char i,dat=0;
    SDA=1;
    for(i=0;i<8;i++)
    {
        SCL=1;
        dat<<=1;
        dat|=SDA;
        SCL=0;
    }
    return dat;
}

void I2CACK(bit ack)
{
    SDA=!ack;
    SCL=1;
    _nop_();
    _nop_();
    SCL=0;
    SDA=1;
}

void Ds18b20WriteByte(unsigned char dat)
{
    unsigned char i;
    for(i=0;i<8;i++)
    {
        DSPORT=0;
        _nop_();
        _nop_();
        DSPORT=dat&0x01;
        _nop_();
        _nop_();
        DSPORT=1;
        dat>>=1;
    }
}

unsigned char Ds18b20ReadByte()
{
    unsigned char i,dat=0;
    for(i=0;i<8;i++)
    {
        DSPORT=0;
        _nop_();
        _nop_();
        dat>>=1;
        if(DSPORT)
            dat|=0x80;
        _nop_();
        _nop_();
        DSPORT=1;
    }
    return dat;
}

bit Ds18b20Init()
{
    bit initflag=0;
    DSPORT=1;
    delay_10us(20);
    DSPORT=0;
    delay_10us(200);
    DSPORT=1;
    delay_10us(20);
    initflag=DSPORT;
    delay_10us(20);
    return initflag;
}

void Ds18b20ChangTemp()
{
    Ds18b20Init();
    Ds18b20WriteByte(0xcc);
    Ds18b20WriteByte(0x44);
}

unsigned int GetDistance()
{
    unsigned int distance;
    TH0=0;
    TL0=0;
    TRIG=0;
    delay_10us(2);
    TRIG=1;
    delay_10us(10);
    TRIG=0;
    while(!ECHO);
    TH=TL0;
    while(ECHO);
    TH-=(unsigned char)110-temp;
    distance=TH*256+TL0;
    distance/=58;
    return distance;
}

void OLEDWriteCmd(unsigned char cmd)
{
    I2CStart();
    I2CWrite(0x78);
    I2CACK(1);
    I2CWrite(0x00);
    I2CACK(1);
    I2CWrite(cmd);
    I2CACK(1);
    I2CStop();
}

void OLEDWriteData(unsigned char dat)
{
    I2CStart();
    I2CWrite(0x78);
    I2CACK(1);
    I2CWrite(0x40);
    I2CACK(1);
    I2CWrite(dat);
    I2CACK(1);
    I2CStop();
}

void OLEDInit()
{
    OLEDWriteCmd(0xAE);//display off
    OLEDWriteCmd(0x20);//Set Memory Addressing Mode
    OLEDWriteCmd(0x10);//00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
    OLEDWriteCmd(0xb0);//Set Page Start Address for Page Addressing Mode,0-7
    OLEDWriteCmd(0xc8);//Set COM Output Scan Direction
    OLEDWriteCmd(0x00);//---set low column address
    OLEDWriteCmd(0x10);//---set high column address
    OLEDWriteCmd(0x40);//--set start line address
    OLEDWriteCmd(0x81);//--set contrast control register
    OLEDWriteCmd(0xff);
    OLEDWriteCmd(0xa1);//--set segment re-map 0 to 127
    OLEDWriteCmd(0xa6);//--set normal display
    OLEDWriteCmd(0xa8);//--set multiplex ratio(1 to 64)
    OLEDWriteCmd(0x3f);//--1/64 duty
    OLEDWriteCmd(0xa4);//0xa4,Output follows RAM content;0xa5,Output ignores RAM content
    OLEDWriteCmd(0xd3);//-set display offset
    OLEDWriteCmd(0x00);//-not offset
    OLEDWriteCmd(0xd5);//--set display clock divide ratio/oscillator frequency
    OLEDWriteCmd(0xf0);//--set divide ratio
    OLEDWriteCmd(0xd9);//--set pre-charge period
    OLEDWriteCmd(0x22); //
    OLEDWriteCmd(0xda);//--set com pins hardware configuration
    OLEDWriteCmd(0x12);
    OLEDWriteCmd(0xdb);//--set vcomh
    OLEDWriteCmd(0x20);//0x20,0.77xVcc
    OLEDWriteCmd(0x8d);//--set DC-DC enable
    OLEDWriteCmd(0x14);
    OLEDWriteCmd(0xaf);//--turn on oled panel
}

void OLEDShowNum(unsigned char x,unsigned char y,unsigned int num)
{
    unsigned char i;
    for(i=0;i<5;i++)
        OLEDWriteData(ASCII[num/10000][i]);
    OLEDWriteData(0);
    for(i=0;i<5;i++)
        OLEDWriteData(ASCII[(num%10000)/1000][i]);
    OLEDWriteData(0);
    for(i=0;i<5;i++)
        OLEDWriteData(ASCII[(num%1000)/100][i]);
    OLEDWriteData(0);
    for(i=0;i<5;i++)
        OLEDWriteData(ASCII[(num%100)/10][i]);
    OLEDWriteData(0);
    for(i=0;i<5;i++)
        OLEDWriteData(ASCII[num%10][i]);
    OLEDWriteCmd(0xb0+y);
    OLEDWriteCmd(((x&0xf0)>>4)|0x10);
    OLEDWriteCmd((x&0x0f)|0x00);
}

请注意，这只是一个示例代码，并不能保证在所有情况下都能正确工作。在编写实际应用代码时，请根据具体情况进行调整和优化。