LCD1602测试程序.doc

#include#define uchar unsigned char#define uint unsigned int/*sbit RS=P24;sbit RW=P25;sbit EN=P26;/*lcd1602驱动程序*void delay_ms(uint z); bit check_busy();void write_com(char com);void write_dat(uchar date);void lcd_dis_char(char x,char y,uchar date);void lcd_dis_str(uchar x,uchar y,uchar *str);void lcd_int();void lcd_clean();/*void delay_ms(uint z) /延时uint x,y;for(x=z;x0;x-)for(y=124;y0;y-);bit check_busy()/查忙bit result;RS=0;RW=1;EN=1;delay_ms(2);result=(bit)(P0&0x80);EN=0;/一定要拉低，否则后面不能使能return result;void write_com(char com) /写命令while(check_busy();/等于1就等待EN=0;RS=0;RW=0;delay_ms(1);EN=1; P0=com;delay_ms(1);EN=0;void write_dat(uchar date)/写数据while(check_busy();EN=0;RS=1;RW=0;delay_ms(1);EN=1;P0=date;delay_ms(1);EN=0;void lcd_dis_char(uchar x,uchar y,uchar dat) /液晶定位和写单个的字符uchar address; if(y=1) address=0x80+x; /0=x16;elseaddress=0x80+0x40+x;write_com(address);write_dat(dat);void lcd_dis_str(uchar x,uchar y,uchar *str)/定位并写字符串uchar address; if(y=1) address=0x80+x;/0=x16;elseaddress=0x80+0x40+x;write_com(address);while(*str!=0) write_dat(*str);str+;void lcd_int() /1602的初始化write_com(0x38);delay_ms(1);write_com(0x0c);delay_ms(1);write_com(0x06);delay_ms(1);write_com(0x01); delay_ms(1); void lcd_clean()/清屏write_com(0x01);delay_ms(1);void main() lcd_int(); lcd_dis_str(2,1,welcome!)