Nguyên văn bởi tdm
(Post 44699)
thôi thì để tôi chèn giúp bạn vài dòng lệnh để code hoàn chỉnh vậy.
Code:
#include <16F877A.h>
#include <def_877a.h>
#device *=16 adc=10
#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT,NOLVP, NOCPD, NOWRT
#use delay(clock=20000000)
#include <lcd_lib_4bit.c> // Thu vien ham cho LCD
int8 low,high,min,max,i,sida=0xaa;
int1 do_F;
float value;
#define nut1 RC2
#define nut2 RC3
#define nut3 RC4
#INT_EXT
void test()
{
if (do_F == 1) do_F=0;
else do_F=1;
}
void banphim(void);
void convert_bcd(int8 x);
//-----------------------------------------------------------------
void main()
{
min =0; //nhiet do mim
max =40; //nhiet do max
do_F =0 ;
i = 10 ;
trisa = 0xFF;
trisb = 0x01;
trisc = 0b00011100;
output_low(pin_C0);
output_low(pin_C1);
//==== Khoi tao cho ngat ngoai===============================================
enable_interrupts (INT_EXT);
ext_int_edge(H_TO_L);
enable_interrupts (GLOBAL);
//=========== Khoi tao che do cho bo ADC=====================================
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_INTERNAL);
LCD_init();
LCD_putcmd(0x01);
LCD_putchar("do_nhiet_do:");
LCD_putcmd(0xC0);
LCD_putchar("cho ty nhe ...");
delay_us(10);// Lay mau nhiet do lan dau tien
value=(float)read_adc();
value = (value - 558.5)/2.048; // For 5V supply
// value = (value - 754.8)/2.048; // For 3.7V Supply
// value = (value - 698.2)/2.048; // For 4V supply
convert_bcd(value); // Tach so tram, chuc, donvi de hien thi len LED 7
delay_ms(100);
LCD_putcmd(0xC0);
LCD_putchar("Ok ");
delay_ms(100);
while(1)
{
banphim();
if (i==10)
{
if(sida==0xaa)
{
value = read_adc();
value=(value-558.5)/2.048;
if (do_F==1)
value=1.8*value+32;
convert_bcd(value);
LCD_putcmd(0xC0);
printf(LCD_putchar,"Nhiet do la:");
LCD_putchar(high); LCD_putchar(low);
if (do_F==0)
printf(LCD_putchar," C");
else
printf(LCD_putchar," F");
i=0;
}
else
{
}
}//
if (value <= max & min <=value)
{
output_high(pin_C1);
}
else output_low(pin_C1);
if(value > max ||value < min)
output_high(pin_C0);
else output_low(pin_C0);
i++;
}
}
//The End=======================================================================
void convert_bcd(int8 x)
{
low=x%10; //chia lay phan du, so hang don vi
high=x/10; //tach hang tram va hang chuc
low = low + 0x30;
high = high + 0x30;
}
void banphim()
{
if (nut1 == 0)
{
sida=~sida;
if(sida!=0xaa)
{
LCD_putcmd(0x01);
LCD_putchar("nhap nhiet do:");
LCD_putcmd(0xC0);
printf(LCD_putchar,"gia tri MAX:%d",max);
}
else
{
LCD_putcmd(0x01);
LCD_putchar("do_nhiet_do:");
value = read_adc();
value=(value-558.5)/2.048;
if (do_F==1)
value=1.8*value+32;
convert_bcd(value);
LCD_putcmd(0xC0);
printf(LCD_putchar,"Nhiet do la:");
LCD_putchar(high); LCD_putchar(low);
if (do_F==0)
printf(LCD_putchar," C");
else
printf(LCD_putchar," F");
}
while(nut1 == 0)
{
}
}
else if (nut3 == 0)
{
if(sida!=0xaa)
{
max = max - 1;
LCD_putcmd(0xC0);
printf(LCD_putchar,"gia tri MAX:%d",max);
}
else
{
}
while(nut3 == 0)//cho nha phim
{
}
delay_ms(10);//chong nay phim
}
else if (nut2 == 0)
{
if(sida!=0xaa)
{
max = max +1;
LCD_putcmd(0xC0);
printf(LCD_putchar,"gia tri MAX:%d",max);
}
else
{
}
while(nut2 == 0)//cho nha phim
{
}
delay_ms(10);//chong nay phim
}
else
{
}
}
http://www.youtube.com/watch?v=nvtwwuzRkZI
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