#include<reg51.h>
#include<string.h>
#define LCD1602_DB P2
sbit LCD1602_RS = P3^5;
sbit LCD1602_RW = P3^6;
sbit LCD1602_E = P3^7;
void InitLcd1602() ;
void LcdWaitReady() ;
void LcdWriteCmd(unsigned char cmd) ;
void LcdwriteDat(unsigned char dat) ;
void LcdSetCursor(unsigned char x,unsigned char y) ;
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str) ;
void main()
{
unsigned char str[]="My NO:19031105";
//init_uart();初始化串口
InitLcd1602();
LcdShowStr(0,0,str);
LcdShowStr(0,1,"Welcome to JYPC");
}
void LcdWaitReady()
{
unsigned char sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do
{
LCD1602_E = 1;
sta = LCD1602_DB;
LCD1602_E = 0;
}
while(sta & 0x80);
}
void LcdWriteCmd(unsigned char cmd)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_E = 1;
LCD1602_E = 0;
}
void LcdWriteDat(unsigned char dat)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_E = 1;
LCD1602_E = 0;
}
void LcdSetCursor(unsigned char x, unsigned char y)
{
unsigned char addr;
if(y == 0)
addr = 0x00 + x;
else
addr = 0x40 + x;
LcdWriteCmd(addr | 0x80);
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str)
{
LcdSetCursor(x,y);
while(*str != '\0')
{
LcdWriteDat(*str++);
}
}
void InitLcd1602()
{
LcdWriteCmd(0x38);
LcdWriteCmd(0x0C);//开显示，不显示光标，且不闪烁
LcdWriteCmd(0x06);//每次写入数据后地址指针加1
LcdWriteCmd(0x01);//清屏
}
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