基于51单片机的数字电容测量仪设计

#ifndef __1602_h__ #define __1602_h__

#include

sbit RS = P2^2; //定义端口 sbit RW = P2^1; sbit EN = P2^0;

#define RS_CLR RS=0 #define RS_SET RS=1 #define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0 #define EN_SET EN=1

unsigned char pro_data(unsigned char mda); void LCD_write_com(unsigned char com); void LCD_write_Data(unsigned char Data); void LCD_init(void);

void lcd_pos(unsigned char pos); void disp(unsigned char *p); void dispchar1(unsigned char *p); void dispchar2(unsigned char *p); void dispchar3(unsigned char *p); #endif

(d) 1602.c程序清单：

#include \#include \

- 21 -

void LCD_write_com(unsigned char com) { RS_CLR; RW_CLR; EN_SET;

com = pro_data(com); P1 = com; delay_us(5); EN_CLR;

}

void LCD_write_Data(unsigned char Data) { RS_SET; RW_CLR; EN_SET;

Data = pro_data(Data); P1 = Data; delay_us(5); EN_CLR;

}

void LCD_init(void) {

LCD_write_com(0x38); delay_ms(5);

LCD_write_com(0x38); delay_ms(5);

LCD_write_com(0x38);

- 22 -

// 显示模式设置

delay_ms(5);

LCD_write_com(0x38);

LCD_write_com(0x08); // 显示关闭 LCD_write_com(0x01); // 显示清屏 LCD_write_com(0x06); // 显示光标移动设置 delay_ms(5);

LCD_write_com(0x0c); // 显示开及光标设置 }

void lcd_pos(unsigned char pos) { }

void disp(unsigned char *p) {

unsigned char i; lcd_pos(0x43); for(i=0;i<6;i++)

// 第二行显示数据

LCD_write_com(0x80|pos);

{ }

void dispchar1(unsigned char *p) // 第一行显示需要显示的提示字符串 {

}

if(4==i) { }

LCD_write_Data('0'+(*p)); p++;

LCD_write_Data(0x2e);

lcd_pos(0x00); while(*p != '\\0')

- 23 -

{ LCD_write_Data(*p); p++;

}

lcd_pos(0x4c); LCD_write_Data('f');

}

void dispchar2(unsigned char *p) { lcd_pos(0x40); while(*p != '\\0') { LCD_write_Data(*p);

p++;

}

}

void dispchar3(unsigned char *p) { unsigned char i; lcd_pos(0x00); while(*p != '\\0') { LCD_write_Data(*p); p++;

}

lcd_pos(0x40); for(i=0;i<16;i++) {

LCD_write_Data(' ');

// 第二行显示需要显示的提示字符串 // 第一行显示 第二行清空 - 24 -