cam bien nhiet bao chay hien thi ket qua len LCD va co chuong bao chay

[ducmotlang]

day la doan code bao gom file mo phong ve he thong bao chay khi nhiet do vuot nguong cho phep.moi nguoi tham khao gop y.thank!

//*CODE MACH BAO CHAY BANG CHUONG VA HIEN THI CANH BAO LEN LCD*//
#include <16f877a.h>
#include <def_877a.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,PUT
#device adc=10//SU DUNG ADC 10 BIT
#use delay(clock=20000000)
#include <lcd_lib_4bit.c>//file dinh nghia ve LCD 4 bit//
INT ADC;
FLOAT NHIETDO;
void doc_adc(void);//CHUONG TRINH CON DOC TIN HIEU//
void xuly_adc(void);//CHUONG TRINH CON XU LY TIN HIEU//
void hienthi_lcd(void);//CHUONG TRINH CON HIEN THI LEN LCD//

//CHUONG TRINH CHINH//
void main()
{
SET_TRIS_A(0XFF);
SET_TRIS_b(0X00);
SET_TRIS_C(0x00);

lcd_init();//ham khai bao co su dung lcd//
setup_adc(adc_clock_internal);//chon thoi gian lay mau 2-6us//
setup_adc_ports(an0);//CHAN AN0 NHAN ANALOG//
DELAY_MS(10);

//VONG LAP WHILE XU LY HIEN THI LCD//
WHILE (true)
{
doc_adc();//nhay den ct con
xuly_adc();
hienthi_lcd();
IF (NHIETDO >=79)
{
OUTPUT_LOW(PIN_C2);//BAT CHUONG BAO CHAY//
}
ELSE
{
OUTPUT_HIGH(PIN_C2);//TAT CHUONG BAO CHAY//
}
}
}

//CHUONG TRINH DOC TIN HIEU VAO ANALOG//
void doc_adc(void)
{
set_adc_channel(0);//CHON CHAN AN0 DE DOC VAO GIA TRI ANALOG//
delay_us(10);
ADC = read_adc();//lenh doc gia tri vao analog//
}

//chuong trinh xu ly tin hieu A/D//
void xuly_adc(void)
{
NHIETDO =((float)ADC*4.88)/10;
//cong thuc chuyen doi tra datasheet ve ADC 10 O DAY LA ADC 10 BIT//
}

//CHUONG TRINH HIEN THI LEN LCD//
void hienthi_lcd(void)
{
lcd_putcmd(line_1);//hien thi dong 1
IF (NHIETDO<79)
{
printf(lcd_putchar,"Welcom to vanson");
}
ELSE
//THEM LENH XOA KI TU HIEN TAI???//
printf(lcd_putchar," CHU Y: CO CHAY ");

lcd_putcmd(line_2);//hien thi dong 2
printf(lcd_putchar,"NHIETDO =%3.1f ^C",NHIETDO);
//=%3.1 ket qua chinh xac den 3 chu so va phan thap phan sau dau , la 1 so//
}