分享一个简单且可行的LCD12864的显示单片机程序

ID:513514 · 发表于 2019-9-20 16:24

在用51单片机做停车场实验的时候一直无法让LCD12864正常显示，用了比较久的时候才完成了这样一个简单且可行的程序，亲测可用。并附上LCD12864的手册与ST7920中文字型码表。这是实验时成功显示的图片：

代码如下：

#include "reg52.h" /
#include "intrins.h"
#define LCD_DB P0 //LCD12864显示数据接口定义
typedef unsigned char u8;
typedef unsigned int u16;
sbit LCD_RS=P2^6; //定义LCD12864使用的IO口
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
sbit DSdat=P3^4;
u8 usablespace; //停车场可用空间
u16 time1; //停车时间
u8 fee; //停车费用
//---车牌首位汉字显示数据编码---//
code u16 platenumber[32]={0xBEA9,0xBDF2,0xBBA6,0xD3E5,0xD5E3,0xC3F6,0xD4C1,0xBCBD,0xBDFA,0xC3C9, //京津沪渝浙闽粤冀晋蒙
0xC1C9,0xBCAA,0xBADA,0xCBD5,0xCDEE,0xB8D3,0xC2B3,0xD4A5,0xB6F5,0xCFE6, //辽吉黑苏皖赣鲁豫鄂湘
0xB9F3,0xC7ED,0xB4A8,0xB9F1,0xD4C6,0xB2D8,0xC9C2,0xB8CA,0xC7E0,0xC4FE,0xD0C2,0xA1A0}; //贵琼川桂云藏陕甘青宁新无
u8 car1[10]={22,0x11,0x11,0x12,0x01,0x02,0x03,13}; //车辆账户信息：车牌省位0，车牌市位1，号牌编号2~6，余额7
void delay_12864(u16 del) //LCD12864延时函数
{
u16 i;
for(i = 0; i < del; i++){; }
}
void Init_LCD(void) //初始化LCD控制端口函数
{
LCD_RS=1; //输出数据LCD_RS和LCD_EN清零
LCD_RW=0;
LCD_EN=0;
}
void LCD_write_command(u8 command) //LCD12864写指令函数
{
LCD_EN=0;
LCD_RS=0; //写指令
LCD_RW=0; //写入
LCD_DB=command;//赋值给D0-D7对应的IO引脚
delay_12864(50);
LCD_EN=1; //允许
delay_12864(50);
LCD_EN=0;
}
void LCD_write_data(u8 dat) //LCD12864写数据函数
{
LCD_EN=0;
LCD_RS=1; //写数据
LCD_RW=0; //写入
LCD_DB=dat;//赋值给D0-D7对应的IO引脚
delay_12864(50);
LCD_EN=1; //允许
delay_12864(50);
LCD_EN=0;
}
void LCD_init(void) //初始化LCD12864显示设置函数
{
delay_12864(10000);
LCD_write_command(0x30);//功能设置
delay_12864(20);
LCD_write_command(0x30);//功能设置
delay_12864(20);
LCD_write_command(0x0c);//显示开关控制
delay_12864(20);
LCD_write_command(0x01);//显示清除
delay_12864(1200);
LCD_write_command(0x06);//显示清除
delay_12864(50);
}
void LCD_SHOW() //LCD显示函数
{
Init_LCD(); //初始化LCD控制端口
LCD_init(); //初始化LCD显示设置
LCD_write_command(0x80); //第一行数据指针地址
//-------------第一行显示内容-------------//
LCD_write_data(0xBF); //空
LCD_write_data(0xD5);
LCD_write_data(0xB3); //车
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'); //空车位十位
LCD_write_data(usablespace%10+'0'); //空车位个位
LCD_write_data(0xB8); //个
LCD_write_data(0xF6);
LCD_write_data(0x20);
LCD_write_data(0x20);
//-------------第三行显示内容-------------//
LCD_write_data(0xCA); //时
LCD_write_data(0xB1);
LCD_write_data(0xB3); //长
LCD_write_data(0xA4);
LCD_write_data(0xA1); //：
LCD_write_data(0xC3);
LCD_write_data(time1/600+'0'); //停车小时十位
LCD_write_data(time1/60%10+'0'); //停车小时个位
LCD_write_data(0xD0); //小
LCD_write_data(0xA1); //
LCD_write_data(0xCA); //时
LCD_write_data(0xB1); //
LCD_write_data(time1%60/10+'0'); //停车分钟十位
LCD_write_data(time1%60%10+'0'); //停车分钟个位
LCD_write_data(0xB7); //分
LCD_write_data(0xD6); //
//-------------第二行显示内容-------------//
LCD_write_data(0xB3); //车
LCD_write_data(0xB5);
LCD_write_data(0xC5); //牌
LCD_write_data(0xC6);
LCD_write_data(0xBA); //号
LCD_write_data(0xC5);
LCD_write_data(0xA1); //：
LCD_write_data(0xC3); //
LCD_write_data(platenumber[car1[0]]>>8); //车牌省位
LCD_write_data(platenumber[car1[0]]&0xff);
LCD_write_data(car1[1]+'0'); //车牌市位
LCD_write_data(car1[2]+'0'); //车牌号编码
LCD_write_data(car1[3]+'0');
LCD_write_data(car1[4]+'0');
LCD_write_data(car1[5]+'0');
LCD_write_data(car1[6]+'0');
//-------------第四行显示内容-------------//
LCD_write_data(0xCD); //停
LCD_write_data(0xA3);
LCD_write_data(0xB3); //车
LCD_write_data(0xB5);
LCD_write_data(0xB7); //费
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'); //停车费十位
LCD_write_data(fee%10+'0'); //停车费个位
LCD_write_data(0xD4); //元
LCD_write_data(0xAA); //
LCD_write_data(0xA1); //无
LCD_write_data(0xA0);
delay_12864(10);
}
void main() //主函数
{
usablespace=50;
time1=33;
fee=5;
while(1)
{
LCD_SHOW(); //LCD12864进行显示
}
}