LCD1602模块驱动程序代码

以下是 LCD1602 模块驱动程序代码，基于 C 语言：

#include <reg52.h>
#include <intrins.h>

#define LCD_DataPort P0
#define LCD_DataBus P0
#define LCD_DataPort_Mode P0M0
#define LCD_DataPort_Type P0T0
#define LCD_RS P2_0
#define LCD_RW P2_1
#define LCD_EN P2_2

void delay_ms(unsigned int t) {
    unsigned int i, j;
    for (i = 0; i < t; i++) {
        for (j = 0; j < 114; j++);
    }
}

void LCD_WriteCommand(unsigned char cmd) {
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_DataPort = cmd;
    LCD_EN = 1;
    _nop_();
    _nop_();
    LCD_EN = 0;
    delay_ms(1);
}

void LCD_WriteData(unsigned char dat) {
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DataPort = dat;
    LCD_EN = 1;
    _nop_();
    _nop_();
    LCD_EN = 0;
    delay_ms(1);
}

void LCD_Init() {
    LCD_DataPort_Mode = 0x00;
    LCD_DataPort_Type = 0xFF;
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_EN = 0;
    delay_ms(20);
    LCD_WriteCommand(0x38); // Function Set: 8-bit, 2-line, 5x8 font
    LCD_WriteCommand(0x0C); // Display On/Off Control: Display ON, Cursor OFF, Blink OFF
    LCD_WriteCommand(0x06); // Entry Mode Set: Increment cursor position, No display shift
    LCD_WriteCommand(0x01); // Clear Display
    delay_ms(2);
}

void LCD_SetCursor(unsigned char x, unsigned char y) {
    unsigned char addr;
    if (y == 0) {
        addr = 0x80 + x;
    } else {
        addr = 0xC0 + x;
    }
    LCD_WriteCommand(addr);
}

void LCD_WriteString(unsigned char x, unsigned char y, unsigned char *str) {
    LCD_SetCursor(x, y);
    while (*str) {
        LCD_WriteData(*str++);
    }
}

void main() {
    LCD_Init();
    LCD_WriteString(0, 0, "Hello, World!");
    while(1);
}

这个程序包含了 LCD1602 模块的初始化，写入命令和数据，设置光标位置以及写入字符串等函数。你可以根据自己的需要进行修改和扩展。