Learning PIC Coding using C Language

Replies

• 

  shahrul

  How to connect seven segment display?
  Actually, seven segment display not much differ with LED. The seven segment display is only like 8 LED's. 2 way of connection.
  
  
  You do 'ON' and 'OFF' depending the position of the LED. Convert into this function.
  

  char convert(char dec)
  {char segment;
  switch(dec){
  case 0:segment=0b11111100;break;
  case 1:segment=0b01100000;break;
  case 2:segment=0b11011010;break;
  case 3:segment=0b11110010;break;
  case 4:segment=0b01100110;break;
  case 5:segment=0b10110110;break;
  case 6:segment=0b10111110;break;
  case 7:segment=0b11100000;break;
  case 8:segment=0b11111110;break;
  case 9:segment=0b11110110;break;}
  return segment;
  }

• 

  Codes Guides

  Good posts. In my experience, PICs do better sinking current than sourcing. I would recommend connecting the LEDs so that the PIC sinks the currents.
  
  - CG
  #-Link-Snipped-#
• 

  shahrul

  Codes Guides

  Good posts. In my experience, PICs do better sinking current than sourcing. I would recommend connecting the LEDs so that the PIC sinks the currents.

  Yes, that's good. Thank you for sharing experience. I know but I did't follow, I still do sourcing current.
• 

  Codes Guides

  Newer PICs may be better. Old ones used to drop a lot of voltage when sourcing current.
• 

  shahrul

  How to read push button?
  You can connect push button in two ways.
  

  
  

  At example, I have 4 push button, then I convert the input into value. Any push button need to press and released.
  

  int read_button()
  {int i;
  if(PB1==0){
      while(PB1==0) continue;    //wait until PB1 release
      i=1;}
  else if(PB2==0){
      while(PB2==0) continue;    //wait until PB2 release
      i=2;}
  else if(PB3==0){
      while(PB3==0) continue;    //wait until PB3 release
      i=3;}
  else if(PB4==0){
      while(PB4==0) continue;    //wait until PB4 release
      i=4;}
  else i=0;
  return i;
  }

  ​