This program uses a DS1302 real-time clock and LM35 temperature sensor to display the current date, time, day of the week, and temperature in Celsius and Kelvin on an LCD screen. It initializes the LCD and real-time clock, sets the date and time, reads the analog temperature sensor value, converts it to Celsius and Kelvin, and continuously displays the values along with the date and time on the LCD screen, updating every second.

1. C:UsersDaryDesktopreloj con sensor de temperatura LM 35PROGRAMArelo con temp.c
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2: ///**********//(INSTITUTO SUPERIO TECNOLOGICO PUBLICO "TUPAC AMARU DEL CUSCO-PERU")/
3: ///********//INTRUMETACION INDISTRIAL//**************
4: ///****************DISEÑO DE DARIO HUAMAN CUNSA****************/////
5:
6:
7: #include <16f877a.h>
8: #device adc=10
9: #fuses hs
10: #use delay(clock=16mhz)
11: #define RTC_SCLK PIN_c6
12: #define RTC_IO PIN_c7
13: #define RTC_RST PIN_c5
14: #define use_portd_lcd TRUE
15: #include <ds1302.c>
16: #include <lcd.c>
17: //***DECLARACION DE VARIABLES ***//
18: int saniye,dakika,saat,gun,ay,yil,haftanin_gunu;
19: int16 vd=0;
20: float va;
21: float dato1;
22: float v_real;
23: float kelvin;
24: float centigrado;
25: void main(void)
26: ///***PROGRAMA PRINCIPAL***///
27: {
28: lcd_init(); //inicializa el LCD
29: rtc_init(); // inicializa el DS1302
30: rtc_set_datetime(31,12,13,2,23,59); // Tarih ve Saat ayarları yapılıyor
31: setup_adc(adc_clock_internal);//oscilador interno para la convercion
32: setup_adc_ports(AN0_AN1_VREF_VREF);
33: while(true)//bucle....
34: {
35: rtc_get_time(saat,dakika,saniye);
36: rtc_get_date(gun,ay,yil,haftanin_gunu);
37: set_adc_channel(0);//activa el canal analogico
38: delay_ms(10);
39: vd=read_adc();//lectura del valor digital
40: dato1=vd*1.0;
41: va=(3*dato1)/1023;
42: v_real=va/2;
43: centigrado=v_real*1000;//a milivoltios
44: centigrado=centigrado/10;//sensibilidad 10mv/c
45: kelvin=centigrado+273.13;//convecion a kelvin
46: lcd_gotoxy(1,1);
47: printf(lcd_putc,"T=%3.0f%cC %02d/%02d/%02d",centigrado,223,gun,ay,yil);
48: switch(haftanin_gunu) // DS1302'den sayısal olarak alınan haftanın günü bilgis
49: { // metin olarak karşılık atanıyor
50: case 1: printf(lcd_putc,"PAZ"); break; // EÄŸer “1? ise LCD’ye PAZ yaz
51: case 2: printf(lcd_putc,"PZT"); break; // EÄŸer “2? ise LCD’ye PZT yaz
52: case 3: printf(lcd_putc,"SAL"); break; // EÄŸer “3? ise LCD’ye SAL yaz
53: case 4: printf(lcd_putc,"CRS"); break; // EÄŸer “4? ise LCD’ye CRS yaz
54: case 5: printf(lcd_putc,"PER"); break; // EÄŸer “5? ise LCD’ye PER yaz
55: case 6: printf(lcd_putc,"CUM"); break; // EÄŸer “6? ise LCD’ye CUM yaz
56: case 7: printf(lcd_putc,"CTS"); break; // EÄŸer “7? ise LCD’ye CTS yaz
57: }
58: printf(lcd_putc,"nHoras= %02d:%02d:%02d",saat,dakika,saniye);
59: delay_ms(1000); // 1 sn gecikme veriliyor
60: }
61: }
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