[南工程单片机课设]温度传感器温度检测项目

<span style="font-size:18px;">/*
*参数 ：t(0 - 255)
*延时时间 :约2 * t + 12
*/

void delay_us(unsigned char t)
{
while(--t);
}

void delay_ms(unsigned char t)
{
while(t--)
{
delay_us(245);
delay_us(245);
}
}

// void delay_s(unsigned char t)
// {
//     while(t--)
//     {
// 	   delay_ms(200);
// 	   delay_ms(200);
//         delay_ms(200);
//         delay_ms(200);
//         delay_ms(200);
//     }
// }</span>

<span style="font-size:18px;">#ifndef _DELAY_H_
#define _DELAY_H_

extern void delay_us(unsigned char t);
extern void delay_ms(unsigned char t);
// extern void delay_s(unsigned char t);

#endif</span>

<span style="font-size:18px;">#include "./lcd/lcd.h"

#define LCDPORT P0
#define LCD_WRITE_DATA 1
#define LCD_WRITE_COM 0

sbit RS = P2^4;
sbit RW = P2^5;
sbit E  = P2^6;

void lcd_init()
{
delay_ms(15);
lcd1602_write(0x38,LCD_WRITE_COM); //设置8位数据接口，两行显示，5x7点阵字符
delay_ms(5);
lcd1602_write(0x38,LCD_WRITE_COM); //设置8位数据接口，两行显示，5x7点阵字符
delay_ms(5);
lcd1602_write(0x38,LCD_WRITE_COM); //设置8位数据接口，两行显示，5x7点阵字符
delay_ms(5);
lcd1602_write(0x38,LCD_WRITE_COM); //设置8位数据接口，两行显示，5x7点阵字符
delay_ms(5);
lcd1602_write(0x08,LCD_WRITE_COM); //关闭显示，关闭光标和闪烁
delay_ms(5);
lcd1602_write(0x01,LCD_WRITE_COM); //清屏
delay_ms(5);
lcd1602_write(0x06,LCD_WRITE_COM); //设置指针方式，画面不平移
delay_ms(5);
lcd1602_write(0x0c,LCD_WRITE_COM);  //设置指针方式，画面不平移
delay_ms(5);
}

void lcd1602_write(unsigned char byte,unsigned char flag)
{
if(flag)
{
RS = 1;
}
else
{
RS = 0;    //选择输入数据为数据
}
RW = 0;    //写
E = 1;     //选中LCD
LCDPORT = byte;
delay_us(5);
E = 0;     //失能LCD
}

void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte)
{
if((x > 15) || (y > 1))
{
return ;
}
if(0 == y)
{
lcd1602_write(0x80 + x,LCD_WRITE_COM);
}
else
{
lcd1602_write(0x80 + 0x40 + x,LCD_WRITE_COM);
}
lcd1602_write(byte,LCD_WRITE_DATA);
}

/*显示字符串*/
void lcd1602_dis_str(unsigned char x, unsigned char y, unsigned char *str)
{
if((x > 15) || (y > 1))
{
return ;
}
if(0 == y)
{
lcd1602_write(0x80 + x,LCD_WRITE_COM);
}
else
{
lcd1602_write(0x80 + 0x40 + x,LCD_WRITE_COM);
}
while(*str != '\0')
{
lcd1602_write(*str,LCD_WRITE_DATA);
str++;
}
}

void lcd_dis_self()
{
lcd1602_write(0x40,LCD_WRITE_COM);
lcd1602_write(0x07,LCD_WRITE_DATA);
lcd1602_write(0x05,LCD_WRITE_DATA);
lcd1602_write(0x07,LCD_WRITE_DATA);  </span>

<span style="font-size:18px;">    lcd1602_write(0x0,LCD_WRITE_DATA);
lcd1602_write(0x0,LCD_WRITE_DATA);
lcd1602_write(0x0,LCD_WRITE_DATA);
lcd1602_write(0x0,LCD_WRITE_DATA);
lcd1602_write(0x0,LCD_WRITE_DATA);

lcd1602_write(0x80 + 0x40 + 13,LCD_WRITE_COM);
lcd1602_write(0x0,LCD_WRITE_DATA);
}</span>

<span style="font-size:18px;"><span style="font-size:18px;"><strong>#ifndef __LCD1602_H__
#define __LCD1602_H__

#include "./delay/delay.h"
#include <reg52.h>

extern void lcd_init();
extern void lcd1602_write(unsigned char byte,unsigned char flag);
extern void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte);
extern void lcd1602_dis_str(unsigned char x, unsigned char y, unsigned char *str);
extern void lcd_dis_self();

#endif</strong></span></span>

<span style="font-size:18px;">#include <reg52.h>
#include <stdio.h>
#include "./delay/delay.h"

void uart_init()
{
SCON = 0x50;
TMOD |= 0x20;
TH1 = 0xfd;
TR1 = 1;
}
</span>

<span style="font-size:18px;">#ifndef _UART_H_
#define _UART_H_

extern void uart_init();
// extern void uart_send_byte(unsigned char byte);
// extern void uart_send_str(unsigned char *s);

#endif</span>

<span style="font-size:18px;">#include <reg52.h>
#include <intrins.h>
#include <stdio.h>
#include "./lcd/lcd.h"
#include "./delay/delay.h"
#include "./uart/uart.h"

#define LEDPORT P1

sbit ds = P2^3;
sbit beep = P2^7;
bit ack = 0;

void ds_reset()
{
ds = 1;       //总线拉高
ds = 0;
delay_us(200);
delay_us(200);
ds = 1;           //释放总线
delay_us(30);
if(0 == ds)       //检测是否被拉低
{
ack = 1;
}
else
{
ack = 0;
}
delay_us(200);
delay_us(100);
}

void ds_send_byte(unsigned char byte)
{
unsigned char i;
for(i = 0; i < 8; i++)
{
ds = 0;
_nop_();
_nop_();   //1us
ds = byte & 0x01;     //最低位开始赋值
byte >>= 1;
delay_us(30);
ds = 1;
}
delay_us(30);
}

bit ds_read_bit()
{
bit tmp;
ds = 1;
ds = 0;
_nop_();
_nop_();
ds = 1;
tmp = ds;
delay_us(30);
return tmp;
}

unsigned char ds_read_byte()
{
unsigned char i,j,k;
for(i = 0; i < 8; i++)
{
j = ds_read_bit();

k = (j << 7) | (k >> 1);
}
return k;
}

void main()
{
unsigned char a;
unsigned int b;
unsigned char i;
unsigned int temp;
unsigned char num = 0x7f;
unsigned char disbuf[20];
float wendu;

lcd_init();
uart_init();

while(1)
{
ds_reset();
ds_send_byte(0xcc);
ds_send_byte(0x44);

ds_reset();
ds_send_byte(0xcc);
ds_send_byte(0xbe);
a = ds_read_byte();
b = ds_read_byte();
temp = (b << 8) | a;
wendu = (float)temp * 0.0625;
sprintf(disbuf,"%6.2f",wendu);
lcd1602_dis_str(4,0,"WELCOME!");
lcd1602_dis_str(1,1,"wendu:");
lcd1602_dis_str(7,1,disbuf);
lcd_dis_self();
lcd_dis_char(14,1,'C');

if(wendu > 30)
{
LEDPORT = _crol_(num,1);
num = LEDPORT;
delay_us(50);

for(i = 0; i < 100; i++)
{
beep = ~beep;
delay_us(100);
}
}

TI = 1;    //发送中断标志位
printf("temperature is : %f\n",wendu);
}
}</span>