lcd1602特技显示程序

#include"include.h" #define CLEARSCREEN LCD_write_command(0x01) /**************定义接口************************/ #define LCDIO P0 sbit LCD1602_RS=P2^7; sbit LCD1602_RW=P2^6; sbit LCD1602_EN=P2^5; /************初始化函数****************/ void LCD_init(void) { CLEARSCREEN;//clear screen LCD_write_command(0x38);//set 8 bit data transmission mode LCD_write_command(0x0c);//open display (enable lcd display) LCD_write_command(0x80);//set lcd first display address CLEARSCREEN;//clear screen } /****************************************************/ /**************写指令函数********************************/ void LCD_write_command(unsigned char command) { LCDIO=command; LCD1602_RS=0; LCD1602_RW=0; LCD1602_EN=0; LCD1602_EN=1; delay_nms(10); } /***************************************************/ /****************写数据函数************************/ void LCD_write_dat(unsigned char dat) { LCDIO=dat; LCD1602_RS=1; LCD1602_RW=0; LCD1602_EN=0; delay_nms(1); LCD1602_EN=1; } /****************************************************/ /***************设置显示位置**************************/ void LCD_set_xy( unsigned char x, unsigned char y ) { unsigned char address; if (y == 1) address = 0x80 + x; else address =0xc0+ x; LCD_write_command(address); } /***************************************************/ /****************显示一个字符**********************/ void LCD_dsp_char( unsigned x,unsigned char y,unsigned char dat) { LCD_set_xy( x, y ); LCD_write_dat(dat); } /**********************************************/ /***************显示字符串函数***************/ void LCD_dsp_string(unsigned char X,unsigned char Y,unsigned char *s) { LCD_set_xy( X, Y ); while (*s) { LCD_write_dat(*s); s ++; } } /***********************************************/ /********** 延时**********************/ void delay_nms(unsigned int n) { unsigned int i=0,j=0; for (i=n;i>0;i--) for (j=0;j<10;j++); } /**************************************/