#include "reg52.h"
#include <intrins.h>
#define databuffer P0
sbit RS = P1^0;
sbit RW = P1^1;
sbit E = P1^4;
void check_busy()
{
char tmp = 0x80;
databuffer = 0x80;
while(tmp & 0x80){
RS = 0;
RW = 1;
E = 0;
_nop_();
E = 1;
_nop_();
_nop_();
tmp = databuffer;
E = 0;
_nop_();
}
}
void Write_Cmd_Func(char cmd)
{
check_busy();
RS = 0;
RW = 0;
E = 0;
_nop_();
databuffer = cmd;
_nop_();
E = 1;
_nop_();
_nop_();
E = 0;
_nop_();
}
void Write_Data_Func(char dataShow)
{
check_busy();
RS = 1;
RW = 0;
E = 0;
_nop_();
databuffer = dataShow;
_nop_();
E = 1;
_nop_();
_nop_();
E = 0;
_nop_();
}
void Delay15ms()
{
unsigned char i, j;
i = 27;
j = 226;
do
{
while (--j);
} while (--i);
}
void Delay5ms()
{
unsigned char i, j;
i = 9;
j = 244;
do
{
while (--j);
} while (--i);
}
void LCD1602_INIT()
{
Delay15ms();
Write_Cmd_Func(0x38);
Delay5ms();
Write_Cmd_Func(0x38);
Write_Cmd_Func(0x08);
Write_Cmd_Func(0x01);
Write_Cmd_Func(0x06);
Write_Cmd_Func(0x0c);
}
void LCD1602_showLine(char row, char col, char *string)
{
switch(row){
case 1:
Write_Cmd_Func(0x80 + col);
while(* string){
Write_Data_Func(* string);
string++;
}
break;
case 2:
Write_Cmd_Func(0x80 + 0x40 + col);
while(* string){
Write_Data_Func(* string);
string++;
}
break;
}
}
void main()
{
LCD1602_INIT();
LCD1602_showLine(1,5,"NO.1");
LCD1602_showLine(2,2,"xxx wo ai ni");
}