//****************************************************************
// 7SEGLED.C       Driving a single 7-Segment LED
//
//
// Version: 1.0
//
//
// By: J. Winpenny
//
//
//
//
// Notes:
//        7 segment led on PORT D ( DP not used )
//        Two push switches on PORT B, bits 0, 1
//
//
//****************************************************************




#define COMMON_CATHODE_LED
// ***** #define COMMON_ANODE_LED *******


#define LED_PORT PORTD


char TRISD@0x88;

char PORTD@0x08;


void DriveLED( char Number );

//***********************************
// PORT Connections for LED
//***********************************
//                 Segment of LED
//***********************************
//                 g f e d c b a
//
// Bit position    6 5 4 3 2 1 0
//***********************************


void main(void)
{


  char count;

  TRISD = 0;        // Set PORT D to all outputs
  TRISB = 0x03;     // PORT B bits 1, 0  are inputs

  count = 0;

  DriveLED( count );            // Start with LED showing Zero


  while(1)                      // Poll swithes non-stop
  {

        //********************************************
        // if input switch on PORTB bit 0 goes low
        //********************************************

        if ( input_pin_port_b(0) == 0 )
        {

                                  //*****************
             count++;             // Count up
                                  //*****************
             DriveLED( count );

             while ( input_pin_port_b(0) == 0 )
             {
                                  //**************************
                                  // Wait for switch release
                                  //**************************
             }
             delay_ms(10);        // Debounce time
                                  // Could check the pin again here

             if ( count >= 9 ) count = 0;

        }


  }





}


//**************************************************
// Display a number 0 - 9 ( binary ) on a 7 SEG LED
//**************************************************
void DriveLED( char Number )
{

 // Array for Numbers 0 thru 9

#ifdef COMMON_CATHODE_LED

  char CommonCathode7SEG[] = { 0x3f,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x67 };

#endif

#ifdef COMMON_ANODE_LED

 char CommonAnode7SEG[] = { 0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x18 };

#endif


       if ( Number < 10 ) // So we don't exceed the array bounds
       {
                                        // Light segments for number n
        #ifdef COMMON_CATHODE_LED
               LED_PORT = CommonCathode7SEG[Number];
        #endif

        #ifdef COMMON_ANODE_LED
               LED_PORT = CommonAnode7SEG[Number];
        #endif

       }

}