MikroC Tutorial - Digital I/O [Input][Switches]

In this lesson you can learn, how to use PIC micro controller's digital I/O pins as input pins. This tutorial created using MikroC Pro v5.6 compiler and Proteus 7.1 simulation software. If you haven't them, you can download from here (software page).

You can learn, how to use singal switch, dual switch and push switch with PIC micro controller in this tutorial.

Simple Circuit Diagram 

MikroC C code

/*
'*******************************************************************************
'  Lesson 02:
'          Digital I/O (Switch) [02]
'  Written by:
'          Hasitha Suneth, 2014.
'  Description:
'          In this lesson, we are going to learn, how to use PIC Digital Input
'          pins properly for switches.
'        * Singal Switch
'        * Dual Switch
'        * Push Switch (on/off)
'  Test configuration:
'    MCU:                        PIC16F628A
'    SW:                         MikroC PRO for PIC 2012 (version v5.6.1)
'  Configuration Word
'    Oscillator:                       4MHz INTOSC Oscillator
'    Watchdog Timer:              OFF
'    Power up Timer:               Disabled
'    Master Clear Enable:         Enabled
'    Browun Out Detect:           Enabled
'    Low Voltage Program:       Disabled
'    Data EE Read Protect:       Disabled
'    Code Protect:                  OFF
'*******************************************************************************
*/
int i=0;                     //unsigned short
void main() 
{
 TRISA = 0xFF;          // Port A as Input
 TRISB = 0x00;          // Port B as Output
 PORTB = 0x00;
  do
  {
  //              Dual Switch              //
  //       ***  Method 01  ***        //
 if (Button(&PORTA, 0, 1, 1))         // if (Button(&PORT(input port),(bit number),(time),(active_state))
    { 
    PORTB.B0 = 1;                       //PortB bit0 On
    PORTB.B1 = 0;                       //PortB bit1 Off
    }
    else 
    {
    PORTB.B0 = 0;                       //PortB bit0 Off
    PORTB.B1 = 1;                       //PortB bit1 On
    }

  //       ***  Method 02  ***      //
    if(PORTA.B1==1)                     //If PortA bit 1 is high, Go in to
     {
     PORTB.B2 = 1;
     PORTB.B3 = 0;
     }
    else                                     //If PortA bit 1 is not high, Go in to
    {
     PORTB.B2 = 0;
     PORTB.B3 = 1;
    }
    
  //             Singal Switch            //
  //       ***  Method 01  ***       //

   if (Button(&PORTA, 2, 1, 1))         //If PortA bit 2 is high, Go in to
    { PORTB.B4 = 1; }
   else                                         //If PortA bit 2 is not high, Go in to
    { PORTB.B4 = 0; }

  //       ***  Method 02  ***        //
   if(PORTA.B3==1)
    { PORTB.B5 = 1; }
   else
    { PORTB.B5 = 0; }
    
  //             Push Switch               //
  //       ***  Method 01  ***        //
   if (Button(&PORTA, 4, 1, 1))
   if(i==1)                                           //If 'i' is high, Go in to
    {PORTB.B6 = 0; i=0; Delay_ms(500);} //PortB Bit 6 = low / i= low / Delay 0.5 seconds for press time out
   else
    {PORTB.B6 = 1; i=1; Delay_ms(500);}
  }
 while(1);                              //Endless loop
}

Download MikroC Code and Proteus simulation file.

password : hasisuneth.blogspot.com

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