有了以上的通用子程序,就可以构造出各种显示程序,如字符、汉字、曲线等。执行这些程序前,必须对液晶进行初始化。初始化的顺序为:关显示→正常显示驱动设置→占空比设置→复位→ADC选择→清屏→开显示,程序如下:
//E1边初始化
void lcd1()
{
DISOFF1(); //关显示E1
TRANS=0XA4; //静态显示驱动
TRANS1(); //发出控制命令
TRANS=0XA9; //占空比为1/32
TRANS1(); //发出控制命令
TRANS=0XE2; //复位
TRANS1(); //发出控制命令
TRANS=0XA0; //ADC选择正常输出
TRANS1(); //发出控制命令
CLEAR1(); //清屏
LCDSTA1(); //判断液晶是否为空闲
DISP1(); //开显示
}
15.4 程序清单
下面给出一个已经在模板上调试通过的程序。 注意在调试该程序时,需把模板上的J9跳针短接。
#include <pIC.h>
//该程序用于液晶显示功能的演示
//运行程序后,液晶上显示"电流有效值 "和"电压有效值 "字样
//系统总的初始化子程序
unsigned char TRANS;
unsigned char PAGEADD; //存放页地址寄存器
unsigned char PAGENUM;//存放总页数寄存器
unsigned char CLMSUM; //存放总列数寄存器
unsigned char CLMADD; //存放列地址寄存器
unsigned char WRITE; //存放显示数据寄存器
unsigned char row; //存放显示起始行寄存器
unsigned char i,k; //通用寄存器
const char table[192]={0X00,0XF8,0X48,0X48,0X48,0X48,0XFF,0X48,
0X48,0X48,0X48,0XFC,0X08,0X00,0X00,0X00,
0X00,0X07,0X02,0X02,0X02,0X02,0X3F,0X42,
0X42,0X42,0X42,0X47,0X40,0X70,0X00,0X00,//"电"
0X00,0X00,0XFE,0X02,0X82,0X82,0X82,0X82,
0XFE,0X82,0X82,0X82,0XC3,0X82,0X00,0X00,
0X40,0X30,0X0F,0X40,0X40,0X40,0X40,0X40,
0X7F,0X40,0X42,0X44,0X4C,0X60,0X40,0X00,//"压"
0X04,0X04,0X04,0X84,0XE4,0X3C,0X27,0X24,
0X24,0X24,0X24,0XF4,0X24,0X06,0X04 ,0X00,
0X4 ,0X2 ,0X1 ,0X0 ,0XFF,0X9,0X9 ,0X9,
0X9 ,0X49,0X89,0X7F,0X0,0X0,0X0 ,0X0, //"有"
0X88,0X48,0XB8,0X9,0XA,0X98,0X2C ,0X48,
0X20,0XD0,0X1F,0X10,0X10,0XF8,0X10 ,0X0,
0X40,0X20,0X18,0X5,0X2,0XD,0X30 ,0X80,
0X80,0X41,0X36,0X8,0X37,0XC0,0X40 ,0X0, //"效"
0X80,0X40,0X20,0XF8,0X7,0X4,0XE4,0XA4,
0XA4,0XBF,0XA4,0XA4,0XF6,0X24,0X0 ,0X0,
0X0,0X0,0X0,0XFF,0X40,0X40,0X7F,0X4A,
0X4A,0X4A,0X4A,0X4A,0X7F,0X40,0X40 ,0X0,//"值"
0X10,0X22,0X64,0XC,0X80,0X44,0X44,0X64,
0X55,0X4E,0X44,0X54,0X66,0XC4,0X0,0X0,
0X4,0X4,0XFE,0X1,0X0,0X80,0X40,0X3F,
0X0,0XFF,0X0,0X3F,0X40,0X40,0X70,0X0 //"流"
};
//系统各口的输入输出状态初始化子程序
本文关键字:程序 PIC单片机,单片机-工控设备 - PIC单片机