分享一個簡單且可行的LCD12864的顯示單片機程序

ID:513514 · 發表于 2019-9-20 16:24

在用51單片機做停車場實驗的時候一直無法讓LCD12864正常顯示，用了比較久的時候才完成了這樣一個簡單且可行的程序，親測可用。并附上LCD12864的手冊與ST7920中文字型碼表。這是實驗時成功顯示的圖片：

代碼如下：

#include "reg52.h" /
#include "intrins.h"
#define LCD_DB P0 //LCD12864顯示數據接口定義
typedef unsigned char u8;
typedef unsigned int u16;
sbit LCD_RS=P2^6; //定義LCD12864使用的IO口
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
sbit DSdat=P3^4;
u8 usablespace; //停車場可用空間
u16 time1; //停車時間
u8 fee; //停車費用
//---車牌首位漢字顯示數據編碼---//
code u16 platenumber[32]={0xBEA9,0xBDF2,0xBBA6,0xD3E5,0xD5E3,0xC3F6,0xD4C1,0xBCBD,0xBDFA,0xC3C9, //京津滬渝浙閩粵冀晉蒙
0xC1C9,0xBCAA,0xBADA,0xCBD5,0xCDEE,0xB8D3,0xC2B3,0xD4A5,0xB6F5,0xCFE6, //遼吉黑蘇皖贛魯豫鄂湘
0xB9F3,0xC7ED,0xB4A8,0xB9F1,0xD4C6,0xB2D8,0xC9C2,0xB8CA,0xC7E0,0xC4FE,0xD0C2,0xA1A0}; //貴瓊川桂云藏陜甘青寧新無
u8 car1[10]={22,0x11,0x11,0x12,0x01,0x02,0x03,13}; //車輛賬戶信息：車牌省位0，車牌市位1，號牌編號2~6，余額7
void delay_12864(u16 del) //LCD12864延時函數
{
u16 i;
for(i = 0; i < del; i++){; }
}
void Init_LCD(void) //初始化LCD控制端口函數
{
LCD_RS=1; //輸出數據LCD_RS和LCD_EN清零
LCD_RW=0;
LCD_EN=0;
}
void LCD_write_command(u8 command) //LCD12864寫指令函數
{
LCD_EN=0;
LCD_RS=0; //寫指令
LCD_RW=0; //寫入
LCD_DB=command;//賦值給D0-D7對應的IO引腳
delay_12864(50);
LCD_EN=1; //允許
delay_12864(50);
LCD_EN=0;
}
void LCD_write_data(u8 dat) //LCD12864寫數據函數
{
LCD_EN=0;
LCD_RS=1; //寫數據
LCD_RW=0; //寫入
LCD_DB=dat;//賦值給D0-D7對應的IO引腳
delay_12864(50);
LCD_EN=1; //允許
delay_12864(50);
LCD_EN=0;
}
void LCD_init(void) //初始化LCD12864顯示設置函數
{
delay_12864(10000);
LCD_write_command(0x30);//功能設置
delay_12864(20);
LCD_write_command(0x30);//功能設置
delay_12864(20);
LCD_write_command(0x0c);//顯示開關控制
delay_12864(20);
LCD_write_command(0x01);//顯示清除
delay_12864(1200);
LCD_write_command(0x06);//顯示清除
delay_12864(50);
}
void LCD_SHOW() //LCD顯示函數
{
Init_LCD(); //初始化LCD控制端口
LCD_init(); //初始化LCD顯示設置
LCD_write_command(0x80); //第一行數據指針地址
//-------------第一行顯示內容-------------//
LCD_write_data(0xBF); //空
LCD_write_data(0xD5);
LCD_write_data(0xB3); //車
LCD_write_data(0xB5);
LCD_write_data(0xCE); //位
LCD_write_data(0xBB);
LCD_write_data(0xA1); //:
LCD_write_data(0xC3);
LCD_write_data(0x20);
LCD_write_data(0x20);
LCD_write_data(usablespace/10+'0'); //空車位十位
LCD_write_data(usablespace%10+'0'); //空車位個位
LCD_write_data(0xB8); //個
LCD_write_data(0xF6);
LCD_write_data(0x20);
LCD_write_data(0x20);
//-------------第三行顯示內容-------------//
LCD_write_data(0xCA); //時
LCD_write_data(0xB1);
LCD_write_data(0xB3); //長
LCD_write_data(0xA4);
LCD_write_data(0xA1); //：
LCD_write_data(0xC3);
LCD_write_data(time1/600+'0'); //停車小時十位
LCD_write_data(time1/60%10+'0'); //停車小時個位
LCD_write_data(0xD0); //小
LCD_write_data(0xA1); //
LCD_write_data(0xCA); //時
LCD_write_data(0xB1); //
LCD_write_data(time1%60/10+'0'); //停車分鐘十位
LCD_write_data(time1%60%10+'0'); //停車分鐘個位
LCD_write_data(0xB7); //分
LCD_write_data(0xD6); //
//-------------第二行顯示內容-------------//
LCD_write_data(0xB3); //車
LCD_write_data(0xB5);
LCD_write_data(0xC5); //牌
LCD_write_data(0xC6);
LCD_write_data(0xBA); //號
LCD_write_data(0xC5);
LCD_write_data(0xA1); //：
LCD_write_data(0xC3); //
LCD_write_data(platenumber[car1[0]]>>8); //車牌省位
LCD_write_data(platenumber[car1[0]]&0xff);
LCD_write_data(car1[1]+'0'); //車牌市位
LCD_write_data(car1[2]+'0'); //車牌號編碼
LCD_write_data(car1[3]+'0');
LCD_write_data(car1[4]+'0');
LCD_write_data(car1[5]+'0');
LCD_write_data(car1[6]+'0');
//-------------第四行顯示內容-------------//
LCD_write_data(0xCD); //停
LCD_write_data(0xA3);
LCD_write_data(0xB3); //車
LCD_write_data(0xB5);
LCD_write_data(0xB7); //費
LCD_write_data(0xD1);
LCD_write_data(0xD3); //用
LCD_write_data(0xC3); //
LCD_write_data(0xA1); //：
LCD_write_data(0xC3); //
LCD_write_data(fee/10+'0'); //停車費十位
LCD_write_data(fee%10+'0'); //停車費個位
LCD_write_data(0xD4); //元
LCD_write_data(0xAA); //
LCD_write_data(0xA1); //無
LCD_write_data(0xA0);
delay_12864(10);
}
void main() //主函數
{
usablespace=50;
time1=33;
fee=5;
while(1)
{
LCD_SHOW(); //LCD12864進行顯示
}
}