gistfile1.c

static int8_t SCSI_Read10(uint8_t lun , uint8_t *params)
{
  if(MSC_BOT_State == BOT_IDLE)  /* Idle */
  {

    /* case 10 : Ho <> Di */

    if ((MSC_BOT_cbw.bmFlags & 0x80) != 0x80)
    {
      SCSI_SenseCode(MSC_BOT_cbw.bLUN,
                     ILLEGAL_REQUEST,
                     INVALID_CDB);
      return -1;
    }

    if(USBD_STORAGE_fops->IsReady(lun) !=0 )
    {
      SCSI_SenseCode(lun,
                     NOT_READY,
                     MEDIUM_NOT_PRESENT);
      return -1;
    }

    SCSI_blk_addr = (params[2] << 24) | \
      (params[3] << 16) | \
        (params[4] <<  8) | \
          params[5];

    SCSI_blk_len =  (params[7] <<  8) | \
      params[8];



    if( SCSI_CheckAddressRange(lun, SCSI_blk_addr, SCSI_blk_len) < 0)
    {
      return -1; /* error */
    }

    MSC_BOT_State = BOT_DATA_IN;    // SCSI_blk_addr :: uint32_t, SCSI_blk_size :: uint32_t === 512 , 8 400 000 * 512 = 4300900000
    SCSI_blk_addr *= SCSI_blk_size; // FUCKUP
    SCSI_blk_len  *= SCSI_blk_size;

    /* cases 4,5 : Hi <> Dn */
    if (MSC_BOT_cbw.dDataLength != SCSI_blk_len)
    {
      SCSI_SenseCode(MSC_BOT_cbw.bLUN,
                     ILLEGAL_REQUEST,
                     INVALID_CDB);
      return -1;
    }
  }
  MSC_BOT_DataLen = MSC_MEDIA_PACKET;

  return SCSI_ProcessRead(lun);
}