ds18b20_write_byte(0xcc); ds18b20_write_byte(0x44);优化一下
时间: 2024-04-15 16:27:41 浏览: 111
ds18b20 代码
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对于DS18B20温度传感器的初始化和温度读取,可以进行一些优化。具体而言,可以将初始化和读取温度的操作封装为函数,以提高代码的可读性和可维护性。
以下是经过优化的代码示例:
```c
#include <reg52.h>
#include <stdio.h>
#include <intrins.h>
#define LCD1602_DB P0
sbit LCD1602_RS = P2^0;
sbit LCD1602_RW = P2^1;
sbit LCD1602_E = P2^2;
sbit STEP = P1^0; // 步进电机控制引脚
unsigned char code lcd_init_cmd[] = {0x38, 0x0c, 0x06, 0x01, 0x80};
unsigned char lcd_buf[16]; // 用于存储LCD显示的字符串
void delay(unsigned int n)
{
unsigned int i, j;
for (i = n; i > 0; i--)
for (j = 110; j > 0; j--);
}
void lcd_write_cmd(unsigned char cmd)
{
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_E = 1;
_nop_();
_nop_();
_nop_();
LCD1602_E = 0;
delay(5);
}
void lcd_write_data(unsigned char dat)
{
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_E = 1;
_nop_();
_nop_();
_nop_();
LCD1602_E = 0;
delay(5);
}
void lcd_init()
{
unsigned char i;
lcd_write_cmd(0x01); // 清屏命令
delay(5);
for (i = 0; i < 5; i++)
{
lcd_write_cmd(lcd_init_cmd[i]);
delay(5);
}
}
void lcd_gotoxy(unsigned char x, unsigned char y)
{
unsigned char addr;
if (y == 0)
addr = 0x80 + x;
else
addr = 0xc0 + x;
lcd_write_cmd(addr);
delay(5);
}
void lcd_display_string(unsigned char x, unsigned char y, unsigned char *str)
{
lcd_gotoxy(x, y);
while (*str != '\0')
{
lcd_write_data(*str++);
delay(5);
}
}
// DS18B20初始化
void ds18b20_init()
{
DSPORT = 1;
delay(8);
DSPORT = 0;
delay(80);
DSPORT = 1;
delay(30);
}
// DS18B20发送字节
void ds18b20_write_byte(unsigned char dat)
{
unsigned char i;
for (i = 0; i < 8; i++)
{
DSPORT = 0;
DSPORT = dat & 0x01;
delay(5);
DSPORT = 1;
dat >>= 1;
delay(30);
}
}
// DS18B20读取字节
unsigned char ds18b20_read_byte()
{
unsigned char i, j, dat;
dat = 0;
for (i = 0; i < 8; i++)
{
DSPORT = 0;
dat >>= 1;
DSPORT = 1;
j = DSPORT;
delay(5);
if (j)
dat |= 0x80;
delay(40);
}
return dat;
}
// DS18B20读取温度
unsigned char ds18b20_read_temp()
{
unsigned char temp;
ds18b20_init();
ds18b20_write_byte(0xcc); // 跳过ROM指令
ds18b20_write_byte(0x44); // 温度转换指令
delay(750); // 等待转换完成
ds18b20_init();
ds18b20_write_byte(0xcc); // 跳过ROM指令
ds18b20_write_byte(0xbe); // 读取温度指令
temp = ds18b20_read_byte(); // 读取温度值
return temp;
}
void main()
{
unsigned char speed;
lcd_init();
lcd_display_string(0, 0, "Temp Control Motor");
while (1)
{
unsigned char temp = ds18b20_read_temp();
speed = 100 - temp; // 根据温度计算转速,此处为简化示例
motor_control(speed);
lcd_display_string(0, 1, "Temp: ");
sprintf(lcd_buf, "%d", temp);
lcd_display_string(6, 1, lcd_buf);
delay(500); // 延时一段时间后再次读取温度
}
}
```
这个优化的代码示例中,将DS18B20的初始化、发送字节和读取字节的操作封装为函数,使得主程序更加清晰和易读。同时,将读取温度和显示温度的操作放在主循环中,以实时显示温度并控制电机转速。请注意,这只是一个简化的示例,实际应用中可能需要根据具体情况进行调整和优化。
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