51单片机写LCD1602代码

#include<at89x51.h>#include<stdio.h>//-------------#define RW P1_0#define RS P1_1#define EN P1_2#define BUS_LCD P2#define BF P2_7//---------------------------- void init(void); void init_lcd(void); void write_ins_lcd(unsigned char); void write_data_lcd(unsigned char,unsigned char); void ack_lcd(void);//--------------------------------/*void main(){int i;char *str="this is the text of cheh";init();for(i=0;i<24;i++){write_data_lcd(str[i],i);}}*///----------------void init(void){P1=0xff;P2=0xff;P3=0xff;P0=0xff;init_lcd();}//-------------------------void init_lcd(void){write_ins_lcd(0x01);write_ins_lcd(0x38);write_ins_lcd(0x0f);write_ins_lcd(0x06);write_ins_lcd(0x01);write_ins_lcd(0x38);write_ins_lcd(0x80);}//------------------------------------void write_ins_lcd(unsigned char i){ack_lcd();RS=0;RW=0;EN=1;BUS_LCD=i;EN=0;}//-----------------void write_data_lcd(unsigned char i,unsigned char j){if(j<16){write_ins_lcd(0x80+j);}else{write_ins_lcd(0x80+j+0x30);}ack_lcd();RS=1;RW=0;EN=1;BUS_LCD=i;EN=0;}//------------------void ack_lcd(void){BUS_LCD=0xff;while(BF){RS=0;RW=1;EN=0;BUS_LCD=0xff;EN=1;}EN=0;}//------------------------------------END;