日志
LCD1602靜態(tài)顯示
#include <reg52.h>
#define LCD1602_DB P0
sbit LCD1602_RS = P1^0;
sbit LCD1602_RW = P1^1;
sbit LCD1602_E = P1^5;
void LcdInit();
void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
void main ()
{
unsigned char str[] = "Kingst Studio";
LcdInit();
LcdShowStr(2, 0, str);
LcdShowStr(0, 1, "Welcome to KST51");
while(1)
{}
}
void LcdWaitReady() //讀取“忙”表示，等待液晶準(zhǔn)備好
{
unsigned char sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do // do...while循環(huán)語句
{
LCD1602_E = 1;
sta = LCD1602_DB; //讀取狀態(tài)字
LCD1602_E = 0; //讀完了要關(guān)閉使能，防止液晶輸出數(shù)據(jù)干擾總線
} while (sta & 0x80); //bit7等于1表示液晶正忙，重復(fù)檢測直到其等于0為止
}
void LcdWriteCmd(unsigned char cmd) //寫入命令函數(shù)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_DB = cmd;
LCD1602_E = 1;
LCD1602_E = 0;
}
void LcdWriteDat(unsigned char dat) //寫入數(shù)據(jù)函數(shù)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_DB = dat;
LCD1602_E = 1;
LCD1602_E = 0;
}
void LcdInit() //液晶初始化函數(shù)
{
LcdWriteCmd(0x38); //16*2顯示，5*7點(diǎn)陣，8位數(shù)據(jù)接口
LcdWriteCmd(0x0C); //顯示器開，光標(biāo)關(guān)閉
LcdWriteCmd(0x06); //文字不動(dòng)，地址自動(dòng)加1
LcdWriteCmd(0x01); //清屏
}
void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str) //顯示字符串，屏幕起始坐標(biāo)(x,y)，字符串指針str
{
unsigned char addr;
//由輸入的顯示坐標(biāo)計(jì)算顯示RAM的地址
if (y == 0)
{
addr = 0x00 + x; //第一行字符地址從0x00起始
}
else
{
addr = 0x40 + x; //第二行字符地址從0x40起始
}
//由起始顯示RAM地址連續(xù)寫入字符串
LcdWriteCmd(addr | 0x80); //寫入起始地址
while (*str != '\0') //連續(xù)寫入字符串?dāng)?shù)據(jù)，直到檢測到結(jié)束符
{
LcdWriteDat(*str); //注意*str就是這個(gè)指針指向的內(nèi)容
str++;
}
}
