Họ và tên: Hoàng Ngọc Bình – Nguyễn Thanh Tùng
Lớp: Tự động hóa -K58
Bài 1
/*
* File: adc.c
* Author: admin
*
* Created on January 30, 2020, 3:46 PM
*/
// PIC16F877A Configuration Bit Settings
// 'C' source line config statements
// CONFIG
#pragma config FOSC = HS // Oscillator Selection bits (HS oscillator)
#pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = OFF // Brown-out Reset Enable bit (BOR disabled)
#pragma config LVP = OFF // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is
digital I/O, HV on MCLR must be used for programming)
#pragma config CPD = OFF // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off)
#pragma config WRT = OFF // Flash Program Memory Write Enable bits (Write protection off; all program
memory may be written to by EECON control)
#pragma config CP = OFF // Flash Program Memory Code Protection bit (Code protection off)
// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.
#include <stdlib.h>
#include <pic.h>
#include <pic16f877a.h>
#include <stdio.h>
#include <conio.h>
#include <xc.h>
#define _XTAL_FREQ 8000000
#define RS RD2
#define EN RD3
#define D4 RD4
#define D5 RD5
#define D6 RD6
#define D7 RD7
////////////////////////////////////
void Lcd_Port(char a)
if(a&1)
D4=1;
else
D4=0;
if(a&2)
D5=1;
else
D5=0;
if(a&4)
D6=1;
else
D6=0;
if(a&8)
D7=1;
else
D7=0;
/////////////////////////////////////////
void Lcd_Cmd(char a)
RS=0;
Lcd_Port(a);
EN=1;
__delay_ms(4);
EN=0;
////////////////////////////////////////
void Lcd_Init()
Lcd_Port(0x00);
__delay_ms(20);
Lcd_Cmd(0x03);
__delay_ms(5);
Lcd_Cmd(0x03);
__delay_ms(11);
Lcd_Cmd(0x03);
Lcd_Cmd(0x02);
Lcd_Cmd(0x02);
Lcd_Cmd(0x08);
Lcd_Cmd(0x00);
Lcd_Cmd(0x0C);
Lcd_Cmd(0x00);
Lcd_Cmd(0x06);
///////////////////////////////////////
void Lcd_Clear()
Lcd_Cmd(0);
Lcd_Cmd(1);
void Lcd_Set_Crusor(char a,char b)
char temp,z,y;
if(a==1)
temp=0x80+b-1;
y=temp&0x0f;
z=temp>>4;
Lcd_Cmd(z);
Lcd_Cmd(y);
}
else if(a==2)
temp=0XC0+b-1;
z=temp>>4;
y=temp&0x0f;
Lcd_Cmd(z);
Lcd_Cmd(y);
//////////////////////////////////////////
void Lcd_Write_Char(char a)
char temp,y;
temp=a&0x0f;
y=a&0xF0;
RS=1;
Lcd_Port(y>>4);
EN=1;
__delay_ms(40);
EN=0;
Lcd_Port(temp);
EN=1;
__delay_ms(40);
EN=0;
void Lcd_Write_String(char*a)
int i;
for(i=0;a[i]!='\0';i++)
Lcd_Write_Char(a[i]);
}
////////////////////////////////////////
void Lcd_Shift_Right()
Lcd_Cmd(0x01);
Lcd_Cmd(0x0c);
void Lcd_Shift_Left()
Lcd_Cmd(0x01);
Lcd_Cmd(0x08);
////////////////////////////////////////
void ADC_init()
ADCON0=0X81;
ADCON1=0X80;
unsigned int ADC_Read(unsigned char channel)
if(channel>7)
return 0;
if(channel<=7)
ADCON0 &=0XC5;
ADCON0 |=channel<<3;
__delay_ms(2);
GO_nDONE=1;
while(GO_nDONE);
return((ADRESH<<8)+ADRESL);
}
}
void main(void)
unsigned int aa;
unsigned int voltage,f;
TRISA= 0XFF;
TRISB= 0X00;
TRISC= 0X00;
TRISD= 0X00;
TRISE2=1;
char s[20];
Lcd_Init();
ADC_init();
while(1)
aa=ADC_Read(7);
voltage=5000.0f/1023*aa;
f=voltage/10;
Lcd_Clear();
sprintf(s,"value=%d",f);
Lcd_Set_Crusor(1,1);
Lcd_Write_String(s);
Lcd_Write_Char(223);
Lcd_Write_Char('C');
if(f<=26)
RB6=0;
RB7=0;
if(f>26 && f<=30)
{
RB6=1;
RB7=0;
if(f >30)
RB6=1;
RB7=1;
Lcd_Set_Crusor(2,1);
__delay_ms(2000);
return;
