仿真可以,但是实物接的时候就不行
//函数声明
void Read_Busy(); //忙检测函数
void Lcd1602_Write_Cmd(unsigned char cmd); //写命令
void Lcd1602_Write_Data(unsigned char dat); //写数据
void LcdSetCursor(unsigned char x,unsigned char y); //坐标显示
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData); //显示字符
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str); //显示字符串
void InitLcd1602(); //初始化
#include"lcd.h"
void Read_Busy() //忙检测函数，判断bit7是0，允许执行；1禁止
{
unsigned char sta;
LCD1602_DB = 0xff;
LCD1602_RS = 0;
LCD1602_RW = 1;
do
{
LCD1602_EN = 1;
sta = LCD1602_DB;
LCD1602_EN = 0; //使能，用完就拉低，释放总线
}while(sta & 0x80);
}
/*void delay(uint n)
{
uint x,y;
for(x=n;x>0;x--)
for(y=110;y>0;y--);
} */
void Lcd1602_Write_Cmd(unsigned char cmd) //写命令
{
Read_Busy();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_EN = 1;
delay(5);
LCD1602_EN = 0;
}
void Lcd1602_Write_Data(unsigned char dat) //写数据
{
Read_Busy();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_EN = 1;
delay(5);
LCD1602_EN = 0;
}
void LcdSetCursor(unsigned char x,unsigned char y) //坐标显示
{
unsigned char addr;
if(y == 0)
addr = 0x00 + x;
else
addr = 0x40 + x;
Lcd1602_Write_Cmd(addr|0x80);
}
//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF; //限制X不能大于15，Y不能大于1
if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
X |= 0x80; //算出指令码
Lcd1602_Write_Cmd(X); //发命令字
Lcd1602_Write_Data(DData); //发数据
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str) //显示字符串
{
LcdSetCursor(x,y); //当前字符的坐标
while(*str != '\0')
{
Lcd1602_Write_Data(*str++);
}
}
void InitLcd1602() //1602初始化
{
Lcd1602_Write_Cmd(0x38); //打开，5*8,8位数据
Lcd1602_Write_Cmd(0x0c);
Lcd1602_Write_Cmd(0x06);
Lcd1602_Write_Cmd(0x01); //清屏
}
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