基于c51单片机实现通过电脑串口向LCD1602发送数据并显示的代码

以下是基于C51单片机实现通过电脑串口向LCD1602发送数据并显示的代码：

#include <reg51.h>

#define LCD_DB P0
sbit LCD_RS = P2^0;
sbit LCD_EN = P2^1;

void delay(unsigned int i)
{
    while(i--);
}

void LCD_init()
{
    delay(15000);
    LCD_RS = 0;
    LCD_EN = 0;
    LCD_DB = 0x38;
    LCD_EN = 1;
    LCD_EN = 0;
    delay(5000);
    LCD_DB = 0x0C;
    LCD_EN = 1;
    LCD_EN = 0;
    delay(5000);
    LCD_DB = 0x01;
    LCD_EN = 1;
    LCD_EN = 0;
    delay(5000);
    LCD_DB = 0x06;
    LCD_EN = 1;
    LCD_EN = 0;
}

void LCD_write_cmd(unsigned char cmd)
{
    LCD_RS = 0;
    LCD_EN = 0;
    LCD_DB = cmd;
    LCD_EN = 1;
    LCD_EN = 0;
}

void LCD_write_data(unsigned char dat)
{
    LCD_RS = 1;
    LCD_EN = 0;
    LCD_DB = dat;
    LCD_EN = 1;
    LCD_EN = 0;
}

void LCD_write_string(unsigned char x, unsigned char y, unsigned char *s)
{
    unsigned char i = 0;
    if(x < 16)
    {
        LCD_write_cmd(0x80 + y*0x40 + x);
    }
    else
    {
        LCD_write_cmd(0x80 + y*0x40 + x - 16);
    }
    while(s[i] != '\0')
    {
        LCD_write_data(s[i]);
        i++;
    }
}

void UART_init()
{
    TMOD |= 0x20;
    TH1 = 0xFD;
    TL1 = 0xFD;
    TR1 = 1;
    SM0 = 0;
    SM1 = 1;
    REN = 1;
    EA = 1;
    ES = 1;
}

void UART_interrupt() interrupt 4
{
    if(RI)
    {
        RI = 0;
        LCD_write_data(SBUF);
    }
    if(TI)
    {
        TI = 0;
    }
}

void main()
{
    LCD_init();
    UART_init();
    while(1)
    {
        LCD_write_string(0, 0, "Serial Port Test");
        LCD_write_string(0, 1, "Data: ");
    }
}

其中，使用P0口作为LCD1602的数据口，使用P2.0和P2.1口作为LCD1602的控制口，使用Timer1作为波特率发生器，使用中断实现接收和发送数据。在UART_interrupt()函数中，RI表示接收到数据，TI表示发送数据完成。在主函数中，通过LCD_write_string()函数向LCD1602上显示字符串。