基于51单片机的lcd1602两行静态显示代码

以下是基于51单片机的LCD1602两行静态显示的代码示例：

#include <reg52.h>

#define LCD_RS P2_0
#define LCD_RW P2_1
#define LCD_EN P2_2
#define LCD_DATA P0

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

void LCD_WriteCommand(unsigned char cmd)
{
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_DATA = cmd;
    LCD_EN = 1;
    delay(100);
    LCD_EN = 0;
}

void LCD_WriteData(unsigned char dat)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DATA = dat;
    LCD_EN = 1;
    delay(100);
    LCD_EN = 0;
}

void LCD_Init(void)
{
    LCD_WriteCommand(0x38);  // Function set: 8-bit, 2-line, 5x7 dots
    LCD_WriteCommand(0x0c);  // Display on, cursor off, blink off
    LCD_WriteCommand(0x06);  // Entry mode set: increment
    LCD_WriteCommand(0x01);  // Clear display
    delay(100);
}

void LCD_WriteString(unsigned char x, unsigned char y, unsigned char *s)
{
    unsigned char i = 0;
    if (y == 0) {
        LCD_WriteCommand(0x80 + x);
    } else {
        LCD_WriteCommand(0xc0 + x);
    }
    while (s[i] != '\0') {
        LCD_WriteData(s[i]);
        i++;
    }
}

void main()
{
    LCD_Init();  // 初始化LCD
    LCD_WriteString(0, 0, "Hello, world!");  // 第一行显示
    LCD_WriteString(0, 1, "51 MCU");  // 第二行显示
    while (1);  // 循环等待
}

代码中定义了LCD_RS、LCD_RW、LCD_EN和LCD_DATA等宏，分别对应LCD的RS、RW、EN和DATA引脚。其中LCD_WriteCommand()和LCD_WriteData()函数分别用于向LCD写入指令和数据，LCD_Init()用于初始化LCD，LCD_WriteString()用于在指定位置显示字符串。最后在main函数中调用这些函数实现LCD的初始化和显示。