pic16f877 + keypad + two 7-segment (help me)

[suleymanqx]

Hi guys! I need a help, what should I do to send first pressed number to first 7-seg(portb) second pressed number to second 7-seg(portc) ?

#include <16f877.h>  

#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD

#use delay (clock=4000000) 

#use fast_io(b)
#use fast_io(c)
#use fast_io(d)

#byte   portb=0x06
#byte   portc=0x07   

#define sut1   pin_d0 
#define sut2   pin_d1 
#define sut3   pin_d2 
#define sut4   pin_d3 

#define sat1   pin_d4 
#define sat2   pin_d5 
#define sat3   pin_d6 
#define sat4   pin_d7

char tus=0;

//******************************
char keypad_read()
{
   output_d(0x00);

   output_high(sat1);
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=1; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=2; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=3; }
   if (input(sut4))   // 4. sütun okunuyor
      { delay_ms(20); tus=0xA; }
   output_low(sat1); // 1. satýr lojik-0 yapýlýyor

   output_high(sat2); // 2. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=4; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=5; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=6; }
   if (input(sut4))   // 4. sütun okunuyor
      { delay_ms(20); tus=0xB; }
   output_low(sat2); // 2. satýr lojik-0 yapýlýyor

   output_high(sat3); // 3. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=7; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=8; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=9; }
   if (input(sut4))   // 4. sütun okunuyor
      {delay_ms(20); tus=0x0C; }
   output_low(sat3); // 3. satýr lojik-0 yapýlýyor

   output_high(sat4); // 3. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=0xE; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=0; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=0xF; }
   if (input(sut4))   // 4. sütun okunuyor
      {delay_ms(20); tus=0xD; }
   output_low(sat4); // 3. satýr lojik-0 yapýlýyor

   return tus;
}

/****************************/

void main ( )
{
   setup_psp(PSP_DISABLED);       
   setup_timer_1(T1_DISABLED);   
   setup_timer_2(T2_DISABLED,0,1);
   setup_adc_ports(NO_ANALOGS);  
   setup_adc(ADC_OFF);             
   setup_CCP1(CCP_OFF);
   setup_CCP2(CCP_OFF);

   set_tris_b(0x00);
   set_tris_c(0x00);  
   set_tris_d(0x0F);  

   output_b(0x00);
   output_c(0x00); 

   while(1)  
   {
      portb=keypad_read(); 
  }
}

 

[anboli]

create one flag with bit type variable

set the flag to send the first number to 1st 7-segment, and clear the flag to send the second number to 2nd 7-segment.

check the the flag to send the data to 7-segment. if yes===> 1st display On.
No===> 2nd display On,

 

[suleymanqx]

create one flag with bit type variable

set the flag to send the first number to 1st 7-segment, and clear the flag to send the second number to 2nd 7-segment.

check the the flag to send the data to 7-segment. if yes===> 1st display On.
No===> 2nd display On,

thank you bro!
Can you write it for me and where I have to write it in code please?

 

[anboli]

- - - Updated - - -

#include <16f877.h>

#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD

#use delay (clock=4000000)

#use fast_io(b)
#use fast_io(c)
#use fast_io(d)

#byte portb=0x06
#byte portc=0x07

#define sut1 pin_d0
#define sut2 pin_d1
#define sut3 pin_d2
#define sut4 pin_d3

#define sat1 pin_d4
#define sat2 pin_d5
#define sat3 pin_d6
#define sat4 pin_d7

char tus=0;

int select_seg=1;

//******************************
char keypad_read()
{
output_d(0x00);

output_high(sat1);
if (input(sut1)) // 1. sütun okunuyor
{ delay_ms(20); tus=1; }
if (input(sut2)) // 2. sütun okunuyor
{ delay_ms(20); tus=2; }
if (input(sut3)) // 3. sütun okunuyor
{ delay_ms(20); tus=3; }
if (input(sut4)) // 4. sütun okunuyor
{ delay_ms(20); tus=0xA; }
output_low(sat1); // 1. satýr lojik-0 yapýlýyor

output_high(sat2); // 2. satýr lojik-1 yapýlýyor
if (input(sut1)) // 1. sütun okunuyor
{ delay_ms(20); tus=4; }
if (input(sut2)) // 2. sütun okunuyor
{ delay_ms(20); tus=5; }
if (input(sut3)) // 3. sütun okunuyor
{ delay_ms(20); tus=6; }
if (input(sut4)) // 4. sütun okunuyor
{ delay_ms(20); tus=0xB; }
output_low(sat2); // 2. satýr lojik-0 yapýlýyor

output_high(sat3); // 3. satýr lojik-1 yapýlýyor
if (input(sut1)) // 1. sütun okunuyor
{ delay_ms(20); tus=7; }
if (input(sut2)) // 2. sütun okunuyor
{ delay_ms(20); tus=8; }
if (input(sut3)) // 3. sütun okunuyor
{ delay_ms(20); tus=9; }
if (input(sut4)) // 4. sütun okunuyor
{delay_ms(20); tus=0x0C; }
output_low(sat3); // 3. satýr lojik-0 yapýlýyor

output_high(sat4); // 3. satýr lojik-1 yapýlýyor
if (input(sut1)) // 1. sütun okunuyor
{ delay_ms(20); tus=0xE; }
if (input(sut2)) // 2. sütun okunuyor
{ delay_ms(20); tus=0; }
if (input(sut3)) // 3. sütun okunuyor
{ delay_ms(20); tus=0xF; }
if (input(sut4)) // 4. sütun okunuyor
{delay_ms(20); tus=0xD; }
output_low(sat4); // 3. satýr lojik-0 yapýlýyor

return tus;
}

/****************************/

void main ( )
{
setup_psp(PSP_DISABLED);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_CCP1(CCP_OFF);
setup_CCP2(CCP_OFF);

set_tris_b(0x00);
set_tris_c(0x00);
set_tris_d(0x0F);

output_b(0x00);
output_c(0x00);

while(1)
{

if(select_seg)
{
if(keypad_read()>0)
{
Portb = keypad_read();
select_seg=0;
}
if(!select_seg)
{
if(keypad_read()>0)
{
Portc = keypad_read();
select_seg=1;
}

}
}
}

 

[suleymanqx]

didn't work why?

 

[anboli]

what was showing now?

 

[suleymanqx]

what was showing now?

each 7 seg writes same number
why?

 

[bikashh]

each 7 seg writes same number
why?

Need some more clarification on how you want the 7-sements to light up.

 

[suleymanqx]

first pressed number to first 7-seg(portb), second pressed number to second 7-seg(portc)

 

[anboli]

modify the program like this.

change the while loop and declare the i variable;

int i=0;

while(1)
{
i = keypad_read();
if(select_seg)
{
if(i>0)
{
Portb = keypad_read();
select_seg=0;
i=0;
}
if(!select_seg)
{
if(i>0)
{
Portc = keypad_read();
select_seg=1;
i=0;
}
}
}

 

[suleymanqx]

thank you bro, but it doesn't work. first pressed number writes to portb then freezes

#include <16f877.h>     // Kullanýlacak denetleyicinin baþlýk dosyasý tanýtýlýyor.

// Denetleyici konfigürasyon ayarlarý
#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD

#use delay (clock=4000000) // Gecikme fonksiyonu için kullanýlacak osilatör frekansý belirtiliyor.

#use fast_io(b)
#use fast_io(c) //Port yönlendirme komutlarý B portu için geçerli
#use fast_io(d) //Port yönlendirme komutlarý C portu için geçerli

#byte   portb=0x06
#byte   portc=0x07   // C portu "tus" ismine eþitleniyor.

#define sut1   pin_d0 // sut1 ifadesi pin_d0 ifadesine eþitleniyor
#define sut2   pin_d1 // sut2 ifadesi pin_d1 ifadesine eþitleniyor
#define sut3   pin_d2 // sut3 ifadesi pin_d2 ifadesine eþitleniyor
#define sut4   pin_d3 // sut3 ifadesi pin_d2 ifadesine eþitleniyor

#define sat1   pin_d4 // sat1 ifadesi pin_d4 ifadesine eþitleniyor
#define sat2   pin_d5 // sat2 ifadesi pin_d5 ifadesine eþitleniyor
#define sat3   pin_d6 // sat3 ifadesi pin_d6 ifadesine eþitleniyor
#define sat4   pin_d7 // sat4 ifadesi pin_d7 ifadesine eþitleniyor

int i=0;
int select_seg=1;
char tus; // karakter tipinde deðiþken tanýmlanýyor




//*********** Keypad Tarama Fonksiyonu *********
char keypad_read() // Fonksiyon ismi
{
   output_d(0x00); // D portu çýkýþý sýfýrlanýyor

   output_high(sat1); // 1. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=1; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=2; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=3; }
   if (input(sut4))   // 4. sütun okunuyor
      { delay_ms(20); tus=0xA; }
   output_low(sat1); // 1. satýr lojik-0 yapýlýyor

   output_high(sat2); // 2. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=4; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=5; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=6; }
   if (input(sut4))   // 4. sütun okunuyor
      { delay_ms(20); tus=0xB; }
   output_low(sat2); // 2. satýr lojik-0 yapýlýyor

   output_high(sat3); // 3. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=7; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=8; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=9; }
   if (input(sut4))   // 4. sütun okunuyor
      {delay_ms(20); tus=0x0C; }
   output_low(sat3); // 3. satýr lojik-0 yapýlýyor

   output_high(sat4); // 3. satýr lojik-1 yapýlýyor
   if (input(sut1))   // 1. sütun okunuyor
      { delay_ms(20); tus=0xE; }
   if (input(sut2))   // 2. sütun okunuyor
      { delay_ms(20); tus=0; }
   if (input(sut3))   // 3. sütun okunuyor
      { delay_ms(20); tus=0xF; }
   if (input(sut4))   // 4. sütun okunuyor
      {delay_ms(20); tus=0xD; }
   output_low(sat4); // 3. satýr lojik-0 yapýlýyor

     
   return tus; // Fonksiyon "tus" deðeri ile geri döner
   
}

/********* ANA PROGRAM FONKSÝYONU********/

void main ( )
{
   setup_psp(PSP_DISABLED);        // PSP birimi devre dýþý
   setup_timer_1(T1_DISABLED);     // T1 zamanlayýcýsý devre dýþý
   setup_timer_2(T2_DISABLED,0,1); // T2 zamanlayýcýsý devre dýþý
   setup_adc_ports(NO_ANALOGS);    // ANALOG giriþ yok
   setup_adc(ADC_OFF);             // ADC birimi devre dýþý
   setup_CCP1(CCP_OFF);
   setup_CCP2(CCP_OFF);

   set_tris_b(0x00);
   set_tris_c(0x00);   // B portu komple çýkýþ
   set_tris_d(0x0F);   // Yüksek deðerlikli 4 bit çýkýþ, düþük deðerlikli 4 bit giriþ

   output_b(0x00);
   output_c(0x00); // Ýlk anda B portu çýkýþý sýfýrlanýyor
   
   
   
   while(1)  // Sonsuz döngü
   {
    i = keypad_read();
if(select_seg)
{
if(i>0)
{
Portb = keypad_read();
select_seg=0;
i=0;
}
if(!select_seg)
{
if(i>0)
{
Portc = keypad_read();
select_seg=1;
i=0;
}
}
}
   }
}

 

[anboli]

whats happening while pressing the second switch and in second display?

 

[M.Imran Ali]

It is better to use portb change interrupt rather than scaning have a look on it

#include <16F877A.h>
#device adc=16

#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=20000000)
#include <LCD.C>
#include <defines.c>
#BIT FLAG = STATUS.RBIF


char key[4][3]= { '1','2','3',
'4','5','6',
'7','8','9',
'*','0','#'};


#int_RB
void RB_isr(void)
{
BYTE COL;
BYTE temp;
int i,j,k;
delay_ms(20);
COL=PORTB;
bit_clear(STATUS, RBIF);
output_bit( PIN_B0, 1);
if(temp!=COL) {i=0; FLAG=0;}
output_bit( PIN_B1, 1);
if(temp!=COL) {i=1; FLAG=0;}
output_bit( PIN_B2, 1);
if(temp!=COL) {i=2; FLAG=0;}

for(k=4;k<=7;k++){

if( bit_test(COL,k)) {j=k; break;}

}

j=j-4;

lcd_gotoxy(17 ,1);
printf(lcd_putc , "%c" , key[j]);
delay_ms(500);


}



void main()
{
lcd_init();
port_b_pullups (true);
enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);






lcd_gotoxy(1 , 1 );
lcd_putc("character is");

set_tris_b(0xf0);
output_bit( PIN_B0, 0);
output_bit( PIN_B1, 0);
output_bit( PIN_B2, 0);


while(TRUE)
{
output_bit( PIN_B0, 0);
output_bit( PIN_B1, 0);
output_bit( PIN_B2, 0);

}

}


it works fine . In defines file define Registers of pic16f877a to make them use in pic c CSS compiler
LCD on port D and keypad on port b. u can use seven segment instead of LCD.

 

[suleymanqx]

whats happening while pressing the second switch and in second display?

Nothing heppens. just first pressed digit sends to portb then doesn't any reaction in second pressed digits

- - - Updated - - -

It is better to use portb change interrupt rather than scaning have a look on it

#include <16F877A.h>
#device adc=16

#FUSES NOWDT                 	       //No Watch Dog Timer
#FUSES HS                    	              //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT            	     //No brownout reset
#FUSES NOLVP                 	             //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=20000000)
#include <LCD.C>
#include <defines.c>
#BIT  FLAG = STATUS.RBIF

       
 char key[4][3]= { '1','2','3',
                         '4','5','6', 
                         '7','8','9',
                         '*','0','#'};
       

#int_RB
void  RB_isr(void) 
{
       BYTE COL;
       BYTE temp;
       int i,j,k;
       delay_ms(20);
       COL=PORTB;
       bit_clear(STATUS, RBIF);
       output_bit( PIN_B0, 1);
       if(temp!=COL) {i=0; FLAG=0;}
         output_bit( PIN_B1, 1);
         if(temp!=COL) {i=1; FLAG=0;}
         output_bit( PIN_B2, 1);
         if(temp!=COL) {i=2; FLAG=0;}
        
        for(k=4;k<=7;k++){
        
        if( bit_test(COL,k)) {j=k; break;}
        
        }
         
         j=j-4;
         
         lcd_gotoxy(17 ,1);
         printf(lcd_putc , "%c" , key[i][j]);
         delay_ms(500);
       
       
}



void main()
{
   lcd_init();
   port_b_pullups (true);
   enable_interrupts(INT_RB);
   enable_interrupts(GLOBAL);
  


   
   
   
   lcd_gotoxy(1 , 1 );
   lcd_putc("character is");
   
   set_tris_b(0xf0);
   output_bit( PIN_B0, 0);
   output_bit( PIN_B1, 0);    
   output_bit( PIN_B2, 0);

   
   while(TRUE)
   {
   output_bit( PIN_B0, 0);
   output_bit( PIN_B1, 0);
   output_bit( PIN_B2, 0);

   }

}

it works fine . In defines file define Registers of pic16f877a to make them use in pic c CSS compiler
LCD on port D and keypad on port b. u can use seven segment instead of LCD.

Thank you bro but I'm not advanced programmer) I'm electrical engineer without programming. So I need a simple code to do this job for making another project with 7-segments.

The anboli's code is perfect for me but it doesnt work properly

 

[suleymanqx]

Done

#include <16f877.h>
#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD
#use delay (clock=2000000) 

#use fast_io(b)
#use fast_io(c)
#use fast_io(d)

#byte   portb=0x06
#byte   portc=0x07

#define sut1   pin_d0 
#define sut2   pin_d1 
#define sut3   pin_d2 
#define sut4   pin_d3 

#define sat1   pin_d4 
#define sat2   pin_d5
#define sat3   pin_d6
#define sat4   pin_d7

char tus,ptus,ekran;

char keypad() 
{
   output_d(0x00);
   tus=0;
   output_high(sat1);
   if (input(sut1))  
      { delay_ms(20); tus=1; }
   if (input(sut2))  
      { delay_ms(20); tus=2; }
   if (input(sut3))   
      { delay_ms(20); tus=3; }
   if (input(sut4))  
      { delay_ms(20); tus=0xA; }
   output_low(sat1); 

   output_high(sat2); 
   if (input(sut1))   
      { delay_ms(20); tus=4; }
   if (input(sut2))   
      { delay_ms(20); tus=5; }
   if (input(sut3))   
      { delay_ms(20); tus=6; }
   if (input(sut4))   
      { delay_ms(20); tus=0xB; }
   output_low(sat2); 

   output_high(sat3); 
   if (input(sut1))   
      { delay_ms(20); tus=7; }
   if (input(sut2))   
      { delay_ms(20); tus=8; }
   if (input(sut3))   
      { delay_ms(20); tus=9; }
   if (input(sut4))   
      {delay_ms(20); tus=0x0C; }
   output_low(sat3); 

   output_high(sat4); 
   if (input(sut1))  
      { delay_ms(20); tus=0xE; }
   if (input(sut2))   
      { delay_ms(20); tus=0; }
   if (input(sut3))   
      { delay_ms(20); tus=0xF; }
   if (input(sut4))   
      {delay_ms(20); tus=0xD; }
   output_low(sat4); 
     
   return tus; 
   
}

void goster_b()
      {      
      ekran=tus;
      if(ekran==255){ekran=0;}output_b(tus);            
      }
void goster_c()
      {
      ekran=tus;
      if(ekran==255){ekran=0;}output_c(tus);            
      }

void main ( )
{
   setup_psp(PSP_DISABLED);        
   setup_timer_1(T1_DISABLED);     
   setup_timer_2(T2_DISABLED,0,1); 
   setup_adc_ports(NO_ANALOGS);    
   setup_adc(ADC_OFF);             
   setup_CCP1(CCP_OFF);
   setup_CCP2(CCP_OFF);

   set_tris_b(0x00);
   set_tris_c(0x00);   
   set_tris_d(0x0F);   

   output_b(0x00);
   output_c(0x00); 
   
   int k;
   
   while(1)  
   {
     keypad();
     if(tus>0)
     {
     k++;
     if(k==1){
     goster_b();
     ptus=tus;
     do{delay_ms(10);keypad();}while(tus==ptus);
     }
     
     if(k==2){
     goster_c();
     ptus=tus; k=0; 
     do{delay_ms(10);keypad();}while(tus==ptus);
     }
    }
  } 
}

 

[anboli]

i missed one curly brace in that loop.

so only it getting freeze..

while(1) // Sonsuz döngü
{
i = keypad_read();
if(select_seg)
{
if(i>0)
{
Portb = keypad_read();
select_seg=0;
i=0;
}
}
if(!select_seg)
{
if(i>0)
{
Portc = keypad_read();
select_seg=1;
i=0;
}
}

}

now its work properly..
sure...