/*
 * CTHN.de MiniLEDCube
 *
 *  usb.h by Kai Lauterbach 11/2011
 *
 *  Based on project: hid-custom-rq example by Christian Starkjohann
 *  Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
 *
 *  License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
 *
 */

#include "usb.h"

/* ------------------------------------------------------------------------- */

/*! \brief
 *  \param data USB Data packet.
 *  \return The length of the received or send data.
 */
usbMsgLen_t usbFunctionSetup(uchar data[8])
{
  usbRequest_t *rq = (void *)data;

  if ((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_VENDOR) {
    if (rq->bRequest == CUSTOM_RQ_SET_FRAME) {
      // because of the code size we have to transfer one frame in
      // two steps (control messages)
      if (! rq->wIndex.bytes[0]) {
        // the lower word
        frame.all = (frame.all & (uint32_t)0xffff0000) |
                (rq->wValue.bytes[0] +
                 (rq->wValue.bytes[1] << 8));
      } else {
        // the high word
        frame.all = (frame.all & (uint32_t)0x0000ffff) |
                ((uint32_t)(rq->wValue.bytes[0] +
                            (rq->wValue.bytes[1] << 8)) << 16);
      }
    } else if (rq->bRequest == CUSTOM_RQ_EEPROM_STORE_FRAME) {
      // save the actual frame to the eeprom
      // don't forget to send a frame first
      eeprom_write_dword(&eep_anim[ rq->wIndex.bytes[0] ], frame.all);
    } else if (rq->bRequest == CUSTOM_RQ_SET_MODE) {
      // set the firmware mode
      // 0 = stop; 1 = single; 2 = loop
      mode = rq->wValue.bytes[0];
    }
  }

  return 0;   /* default for not implemented requests: return no data back to host */
}

/*! \brief Initializes the USB connection.
 */
void init_usb(void)
{
  usbInit();
  usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */

  // fake USB disconnect for > 250 ms
  // for (uint8_t i = 0; i <= 25; i++) {
  //   _delay_ms(10);
  // }
  _delay_ms(250);

  usbDeviceConnect();
}