Code:

volatile static uchar   myData[8];
uchar   usbFunctionWrite(uchar *data, uchar len)
{
    if(bytesRemaining == 0)
        return 1;               /* end of transfer */
    if(len > bytesRemaining)
        len = bytesRemaining;

   currentAddress += len;
    bytesRemaining -= len;

    // copy the whole content of "data"
    uchar i;
    for ( i=0 ; i<len ; i++ ){
       myData[i] = data[i];
    }

    return bytesRemaining == 0; /* return 1 if this was the last chunk */
}

Code:

uchar   usbFunctionRead(uchar *data, uchar len)
{
    if(len > bytesRemaining)
        len = bytesRemaining;

    uchar i;
    for ( i=0 ; i<len ; i++ ){
       data[i] = myData[i];
    }

    currentAddress += len;
    bytesRemaining -= len;
    return len;
}

Code:

volatile static uchar   myData[8];
uchar   usbFunctionWrite(uchar *data, uchar len)
{
    if(bytesRemaining == 0)
        return 1;               /* end of transfer */
    if(len > bytesRemaining)
        len = bytesRemaining;

   currentAddress += len;
    bytesRemaining -= len;

    // copy the whole content of "data"
    uchar i;
    for ( i=0 ; i<len ; i++ ){
       myData[i] = data[i];
    }

    return bytesRemaining == 0; /* return 1 if this was the last chunk */
}

Code:

uchar   usbFunctionRead(uchar *data, uchar len)
{
    if(len > bytesRemaining)
        len = bytesRemaining;

    uchar i;
    for ( i=0 ; i<len ; i++ ){
       data[i] = myData[i];
    }

    currentAddress += len;
    bytesRemaining -= len;
    return len;
}

Code:

#define F_CPU 20000000UL

Code:

static uchar    keyPressed(void)
{

uchar   i;
   uint8_t bits = PINC;
   if (!(bits & 1)) i=1;                  //Si un des bits est a 0 (!), i=valeurs correspondante
   if (!(bits & 2)) i= 2;
   if (!(bits & 8)) i= 3;
   if (!(bits & 16)) i= 4;
   if (!(bits & 32)) i= 5;
   if (bits & 59) i=0;                     //cas ou tout est a 1 (32+16+8+2+1), pas de touche => i=0
   bits = PINB;
   if (!(bits & 2)){
       i= 0;
      PORTC ^= (1<<PC2);                  //^= : bascule
      _delay_ms(10);                     //anti rebond (appui multiple)       
   }
   if (!(bits & 16)) i= 6;
   if (!(bits & 32)) i= 7;
   if (bits & 50) i=0;                     //cas ou tout est a 1 (32+16+2), pas de touche => i=0
   bits = PIND;
   if (!(bits & 2)) i= 8;
   if (!(bits & 32)) i= 9;
   if (!(bits & 128)) i= 10;
   if (bits & 162) i=0;                  //cas ou tout est a 1 (128+32+2), pas de touche => i=0
   return i;                           //A la fin, on retourne la valeur de la touche (0 = pas de touche et de 1 à 10 : une touche)

}

Code:

        if(TIFR & (1<<TOV0)){   /* 22 ms timer */
            TIFR = 1<<TOV0;
            if(idleRate != 0){
                if(idleCounter > 4){
                    idleCounter -= 5;   /* 22 ms in units of 4 ms */

Code:

    /* configure timer 0 for a rate of 12M/(1024 * 256) = 45.78 Hz (~22ms) */
    TCCR0 = 5;      /* timer 0 prescaler: 1024 */

Code:

Table if IDs for discrimination by textual name:

PID dec (hex) | VID dec (hex) | Description of use
==============+===============+============================================
1500 (0x05dc) | 5824 (0x16c0) | For Vendor Class devices with libusb
--------------+---------------+--------------------------------------------
1503 (0x05df) | 5824 (0x16c0) | For generic HID class devices (which are
              |               | NOT mice, keyboards or joysticks)
--------------+---------------+--------------------------------------------
1505 (0x05e1) | 5824 (0x16c0) | For CDC-ACM class devices (modems)
--------------+---------------+--------------------------------------------
1508 (0x05e4) | 5824 (0x16c0) | For MIDI class devices
--------------+---------------+-------------------------------------------- 

Table if IDs for discrimination by serial number string:

PID dec (hex)  | VID dec (hex) | Description of use
===============+===============+===========================================
10200 (0x27d8) | 5824 (0x16c0) | For Vendor Class devices with libusb
---------------+---------------+-------------------------------------------
10201 (0x27d9) | 5824 (0x16c0) | For generic HID class devices (which are
               |               | NOT mice, keyboards or joysticks)
---------------+---------------+-------------------------------------------
10202 (0x27da) | 5824 (0x16c0) | For USB Mice
---------------+---------------+-------------------------------------------
10203 (0x27db) | 5824 (0x16c0) | For USB Keyboards
---------------+---------------+-------------------------------------------
10204 (0x27dc) | 5824 (0x16c0) | For USB Joysticks
---------------+---------------+-------------------------------------------
10205 (0x27dd) | 5824 (0x16c0) | For CDC-ACM class devices (modems)
---------------+---------------+-------------------------------------------
10206 (0x27de) | 5824 (0x16c0) | For MIDI class devices
---------------+---------------+-------------------------------------------
10207 (0x27df) | 5824 (0x16c0) | For Mass Storage class devices
---------------+---------------+-------------------------------------------
10208 (0x27e0) | 5824 (0x16c0) | For Audio class devices
---------------+---------------+-------------------------------------------
10209 (0x27e1) | 5824 (0x16c0) | For CDC-ECM class devices
---------------+---------------+-------------------------------------------
10210 (0x27e2) | 5824 (0x16c0) | For MTP class devices
---------------+---------------+-------------------------------------------