lcd开机流程图_LCD1602程序代码及显示流程图.doc

LCD1602程序代码及显示流程图

LCD1602程序代码及显示流程图

lcd1602显示程序代码

前些天弄了最小系统板后就想着学习1602的显示程序，可惜坛子里的或网上的，都没有简单的1602显示程序，无柰在网上下载了一段经过反复修改测试，终于有了下面一段代码：

// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

// – – 初始化接口

# define LCD_DB P0 // – – P0 = DB0～DB7

sbit LCD_RS=P2 ; // – – p2.0 = RS

sbit LCD_RW=P2; // – – p2.1 = RW

sbit LCD_E=P2; // – – p2.2 = E

// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

// – – 定义函数

# define uchar unsigned char

# define uint unsigned int

// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

// – – 定义子程序函数

void LCD_init(void); // – – 初始化LCD1602函数

void LCD_write_command(uchar command); // – – 向LCD1602写指令函数

void LCD_write_data(uchar dat); // – – 向LCD1602写数据函数

void LCD_set_xy(uchar x，uchar y); // – – 设置LCD1602显示位置 X(0-16)，y(1-2)

void LCD_disp_char(uchar x，uchar y，uchar dat); // – – 在LCD1602上显示一个字符

void LCD_disp_string(uchar X，uchar Y，uchar *s); // – – 在LCD1602上显示一个字符串

//void LCD_check_busy(void);//检查忙函数。我没用到此函数，因为通过率极低。

void LCD_delay_10us(uint n); // – – 10微秒的延时子程序

void LCD_delay_50us(uint n); // – – 50微秒的延时子程序

// – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

// – – 初始化LCD1602

void LCD_init(void)

{

LCD_delay_10us(20);

LCD_write_command(0x38); // – – 设置8位格式，2行，5×7

LCD_delay_10us(5);

LCD_write_command(0x0c); // – – 整体显示，关光标，不闪烁

LCD_delay_10us(5);

LCD_write_command(0x06); // – – 设定输入方式，增量不移位

LCD_delay_10us(5);

LCD_write_command(0x01); // – – 清除屏幕显示

LCD_delay_50us(40);

}

//********************************

// – – 向LCD1602写指令

void LCD_write_command(uchar dat)

{

LCD_delay_10us(5);

LCD_RS=0; // – – 指令

LCD_RW=0; // – – 写入

LCD_DB=dat;

LCD_delay_10us(5);

LCD_E=1; // – – 允许

LCD_delay_10us(5);

LCD_E=0;

}

// – – 向LCD1602写数据

void LCD_write_data(uchar dat)

{

LCD_delay_10us(5);

LCD_RS=1;// – –