PIC16F877A ile Voltmetre ve Ampermetre yapımı

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Merhabalar,

Bitirme projemde, projemdeki devrenin cikis portundaki voltaji ve yukten gecen akimi PIC16F877A ile olcmem gerekiyor. PIC'i kodlamak icin CSS C Compiler kullandim ve devreyi Proteus'ta kurup simule etmeye calistim ancak dogru sonuc elde edemiyorum. Bilgisi olan arkadaslar yardim edebilirler ise cok sevinirim. Gerekli ekran goruntulerini ve kodlari assagiya birakiyorum.

Eki Görüntüle 268412

Kod:Panoya kopyala

#include <16F877A.h>
#define LCD_DATA4    PIN_D4
#define LCD_DATA5    PIN_D5
#define LCD_DATA6    PIN_D6
#define LCD_DATA7    PIN_D7

#define LCD_RW_PIN      PIN_D2
#define LCD_ENABLE_PIN   PIN_D0
#define LCD_RS_PIN       PIN_D1
#device adc = 10
#fuses HS, NOWDT, NOPROTECT, NOBROWNOUT, NOLVP, NOPUT, NOWRT, NODEBUG, NOCPD
#use delay(clock=16000000)

#include <lcd.c>

void main()
{
   float v;
   float v1;
   float i;
   set_tris_a(0xFF); //0xFF defines A port as input.
   set_tris_d(0x00); //0x00 defines D port as output.
   lcd_init(); //Initialization of the LCD
   delay_ms(5);
   setup_adc_ports(AN0);//Set the pin where input is connected
   setup_adc(ADC_CLOCK_DIV_64);
   set_adc_channel(0);//set the channel from which the ADC will be reading the data from
   setup_vref(FALSE);
   while(true)
   {                                     
   delay_ms(10);
   read_adc(ADC_START_ONLY);//Start reading the ADC value
   delay_ms(2);
   v1 = read_adc();                                     
   v = v1 * (40*(2/20)) * (5/1023); // 5/1023=0.004887585532746823069403714565 is the resolution of ADC
   i = v1 / 2000 * (5/1023);
   lcd_gotoxy(1,1);
   printf(lcd_putc,"Voltage:%2.1f"v);                           
   delay_ms(100);                                         
   printf(lcd_putc,"V");
   delay_ms(100);
   lcd_gotoxy(1,2);
   printf(lcd_putc, "Current:%2.1f"i);
   delay_ms(100);
   printf(lcd_putc, "A");
   delay_ms(100);
   };
}

Sorunu cozdum ve baskalarina yardimci olmasi acisindan aciklama geregi duydum.

Kodda v1 float point olarak tanimlandigi icin integer bir sayi ile carpimi sifir sonucunu veriyor. Ayni sorun i icin de gecerli. Duzeltilmis kodu assagiya birakiyorum.

Kod:Panoya kopyala

#include <16F877A.h>
#define LCD_DATA4    PIN_B3
#define LCD_DATA5    PIN_B2
#define LCD_DATA6    PIN_B1
#define LCD_DATA7    PIN_B0

#define LCD_RW_PIN      PIN_D2
#define LCD_ENABLE_PIN   PIN_B5
#define LCD_RS_PIN       PIN_B4
#device adc = 10
#fuses HS, NOWDT, NOPROTECT, NOBROWNOUT, NOLVP, NOPUT, NOWRT, NODEBUG, NOCPD
#use delay(clock=16000000)

#include <lcd.c>

void main()
{
   float v;
   float v1, v2;
   float i;
   set_tris_a(0xFF); //0xFF defines A port as input.
   set_tris_b(0x00); //0x00 defines B port as output.
   lcd_init(); //Initialization of the LCD
   delay_ms(5);
   setup_adc_ports(AN0);//Set the pin where input is connected
   setup_adc(ADC_CLOCK_DIV_64); //Setting up Tad
   set_adc_channel(0);//channel from which the ADC will be reading the data
   setup_vref(FALSE);
   while(true)
   {                                     
   delay_ms(10);
   read_adc(ADC_START_ONLY);
   delay_ms(2);
   v1 = read_adc();                                     
   v = v1 * 250.0 * (5.0/1023.0);
   v2 = v1 * (5.0/1023.0);
   i = v2 / 4000.0;
   lcd_gotoxy(1,1);
   printf(lcd_putc,"V:%2.4f"v);                           
   delay_ms(100);                                         
   printf(lcd_putc,"V");
   delay_ms(100);
   lcd_gotoxy(1,2);
   printf(lcd_putc, "I:%2.9f"i);
   delay_ms(100);
   printf(lcd_putc, "A");
   delay_ms(100);
   };
}

Eki Görüntüle 273973

Simulasyondaki Vin voltaji 1kV.

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