/******************************************************************
                  USB BASED MICROCONTROLLER OUTPUT PORT
                  =====================================

In this project a PIC18F4550 type microcontroller is connected
to a PC through the USB link.

A Visual Basic program runs on the PC where the user enters the
bits to be set or cleared on PORT B of the microcontroller. The
PC sends a command to the microcontroller requesting it to set
or reset the required bits of the microcontroller PORT B.

A 8MHz crystal is used to operate the microcontroller. The actual
CPU clock is raised to 48MHz by setting configuration bits. Also,
the USB module is operated with 48MHz.

The command sent by the PC to the microcontroller is in the
following format:

          P=nT

where n is the byte the microcontroller is requested to send to
PORT B of the microcontroller.

This program includes the USB code.

Author:   Dogan Ibrahim
Date:     September 2007
File:     USB1.C
*****************************************************************/

#include "C:\Program Files\Mikroelektronika\mikroC\Examples\EasyPic4\extra_examples\HID-library\USBdsc.c"

unsigned char Read_buffer[64];
unsigned char Write_buffer[64];
unsigned char num;
//
// Timer interrupt service routine
//
void interrupt()
{
  HID_InterruptProc();                  // Keep alive
  TMR0L = 100;                          // Re-load TMR0L
  INTCON.TMR0IF = 0;                    // Re-enable TMR0 interrupts
}


//
// Start of MAIN program
//
void main()
{

     ADCON1 = 0xFF;                      // Set PORT B to digital I/O
     TRISB = 0;                          // Set PORT B to outputs
     PORTB = 0;                          // Clear all outputs
//
// Set interrupt registers to power-on defaults
// Disable all interrupts
//
     INTCON=0;
     INTCON2=0xF5;
     INTCON3=0xC0;
     RCON.IPEN=0;
     PIE1=0;
     PIE2=0;
     PIR1=0;
     PIR2=0;
//
// Configure TIMER 0 for 3.3ms interrupts. Set prescaler to 256
// and load TMR0L to 100 so that the time interval for timer
// interrupts at 48MHz is 256*(256-100)*0.083 = 3.3ms
//
// The timer is in 8-bit mode by default
//
  T0CON  = 0x47;                         // Prescaler = 256
  TMR0L  = 100;                          // Timer count is 256-156 = 100
  INTCON.TMR0IE = 1;                     // Enable T0IE
  T0CON.TMR0ON = 1;                      // Turn Timer 0 ON
  INTCON = 0xE0;                         // Enable interrupts

//
// Enable USB port
//
   Hid_Enable(&Read_buffer, &Write_buffer);
   Delay_ms(1000);
   Delay_ms(1000);
//
// Read from the USB port. Number of bytes read is in num
//

   for(;;)                               // do forever
{
      num=0;
      while(num != 4)                    // Get 4 characters
      {num = Hid_Read();
      }
      if(Read_buffer[0] == 'P' && Read_buffer[1] == '=' && Read_buffer[3] == 'T')
      {
       if ( Read_buffer[2] =='Q' )
       {PORTB.f0=1;}
        if ( Read_buffer[2] =='R' )
       {PORTB.f1=1;}
       if ( Read_buffer[2] =='S' )
       {PORTB.f2=1;}
       if ( Read_buffer[2] =='T' )
       {PORTB.f3=1;}
       if ( Read_buffer[2] =='U' )
       {PORTB.f4=1;}
       if ( Read_buffer[2] =='V' )
       {PORTB.f5=1;}
       if ( Read_buffer[2] =='W' )
       {PORTB.f6=1;}
       if ( Read_buffer[2] =='X' )
       {PORTB.f7=1;}
        ///////////////////////////////////
        if ( Read_buffer[2] =='A' )
       {PORTB.f0=0;}
        if ( Read_buffer[2] =='B' )
       {PORTB.f1=0;}
       if ( Read_buffer[2] =='C' )
       {PORTB.f2=0;}
       if ( Read_buffer[2] =='D' )
       {PORTB.f3=0;}
       if ( Read_buffer[2] =='E' )
       {PORTB.f4=0;}
       if ( Read_buffer[2] =='F' )
       {PORTB.f5=0;}
      //  if ( Read_buffer[2] =='E' )         /// demo limit
   //  {PORTB.f4=0;}
     //  if ( Read_buffer[2] =='F' )
     //  {PORTB.f5=0;}

      }
 }
   Hid_Disable();

}