Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  XPROG Protocol handler, to process V2 Protocol wrapped XPROG commands used in Atmel programmer devices.
  34  */
  35
  36 #define  INCLUDE_FROM_XPROGPROTOCOL_C
  37 #include "XPROGProtocol.h"
  38
  39 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
  40 /** Base absolute address for the target's NVM controller for PDI programming */
  41 uint32_t XPROG_Param_NVMBase       = 0x010001C0;
  42
  43 /** Size in bytes of the target's EEPROM page */
  44 uint16_t XPROG_Param_EEPageSize    = 32;
  45
  46 /** Address of the TPI device's NVMCMD register for TPI programming */
  47 uint8_t  XPROG_Param_NVMCMDRegAddr = 0x33;
  48
  49 /** Address of the TPI device's NVMCSR register for TPI programming */
  50 uint8_t  XPROG_Param_NVMCSRRegAddr = 0x32;
  51
  52 /** Currently selected XPROG programming protocol */
  53 uint8_t  XPROG_SelectedProtocol    = XPRG_PROTOCOL_PDI;
  54
  55 /** Handler for the CMD_XPROG_SETMODE command, which sets the programmer-to-target protocol used for PDI/TPI
  56  *  programming.
  57  */
  58 void XPROGProtocol_SetMode(void)
  59 {
  60         struct
  61         {
  62                 uint8_t Protocol;
  63         } SetMode_XPROG_Params;
  64
  65         Endpoint_Read_Stream_LE(&SetMode_XPROG_Params, sizeof(SetMode_XPROG_Params), NO_STREAM_CALLBACK);
  66
  67         Endpoint_ClearOUT();
  68         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
  69         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
  70
  71         XPROG_SelectedProtocol = SetMode_XPROG_Params.Protocol;
  72
  73         Endpoint_Write_Byte(CMD_XPROG_SETMODE);
  74         Endpoint_Write_Byte((SetMode_XPROG_Params.Protocol != XPRG_PROTOCOL_JTAG) ? STATUS_CMD_OK : STATUS_CMD_FAILED);
  75         Endpoint_ClearIN();
  76 }
  77
  78 /** Handler for the CMD_XPROG command, which wraps up XPROG commands in a V2 wrapper which need to be
  79  *  removed and processed so that the underlying XPROG command can be handled.
  80  */
  81 void XPROGProtocol_Command(void)
  82 {
  83         uint8_t XPROGCommand = Endpoint_Read_Byte();
  84
  85         switch (XPROGCommand)
  86         {
  87                 case XPRG_CMD_ENTER_PROGMODE:
  88                         XPROGProtocol_EnterXPROGMode();
  89                         break;
  90                 case XPRG_CMD_LEAVE_PROGMODE:
  91                         XPROGProtocol_LeaveXPROGMode();
  92                         break;
  93                 case XPRG_CMD_ERASE:
  94                         XPROGProtocol_Erase();
  95                         break;
  96                 case XPRG_CMD_WRITE_MEM:
  97                         XPROGProtocol_WriteMemory();
  98                         break;
  99                 case XPRG_CMD_READ_MEM:
 100                         XPROGProtocol_ReadMemory();
 101                         break;
 102                 case XPRG_CMD_CRC:
 103                         XPROGProtocol_ReadCRC();
 104                         break;
 105                 case XPRG_CMD_SET_PARAM:
 106                         XPROGProtocol_SetParam();
 107                         break;
 108         }
 109 }
 110
 111 /** Handler for the XPROG ENTER_PROGMODE command to establish a connection with the attached device. */
 112 static void XPROGProtocol_EnterXPROGMode(void)
 113 {
 114         Endpoint_ClearOUT();
 115         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 116         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 117
 118         bool NVMBusEnabled = false;
 119
 120         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 121         {
 122                 /* Enable PDI programming mode with the attached target */
 123                 XPROGTarget_EnableTargetPDI();
 124
 125                 /* Store the RESET key into the RESET PDI register to keep the XMEGA in reset */
 126                 XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
 127                 XPROGTarget_SendByte(PDI_RESET_KEY);
 128
 129                 /* Lower direction change guard time to 0 USART bits */
 130                 XPROGTarget_SendByte(PDI_CMD_STCS | PDI_CTRL_REG);
 131                 XPROGTarget_SendByte(0x07);
 132
 133                 /* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
 134                 XPROGTarget_SendByte(PDI_CMD_KEY);
 135                 for (uint8_t i = sizeof(PDI_NVMENABLE_KEY); i > 0; i--)
 136                   XPROGTarget_SendByte(PDI_NVMENABLE_KEY[i - 1]);
 137
 138                 /* Wait until the NVM bus becomes active */
 139                 NVMBusEnabled = XMEGANVM_WaitWhileNVMBusBusy();
 140         }
 141         else if (XPROG_SelectedProtocol == XPRG_PROTOCOL_TPI)
 142         {
 143                 /* Enable TPI programming mode with the attached target */
 144                 XPROGTarget_EnableTargetTPI();
 145
 146                 /* Lower direction change guard time to 0 USART bits */
 147                 XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG);
 148                 XPROGTarget_SendByte(0x07);
 149
 150                 /* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
 151                 XPROGTarget_SendByte(TPI_CMD_SKEY);
 152                 for (uint8_t i = sizeof(TPI_NVMENABLE_KEY); i > 0; i--)
 153                   XPROGTarget_SendByte(TPI_NVMENABLE_KEY[i - 1]);
 154
 155                 /* Wait until the NVM bus becomes active */
 156                 NVMBusEnabled = TINYNVM_WaitWhileNVMBusBusy();
 157         }
 158
 159         Endpoint_Write_Byte(CMD_XPROG);
 160         Endpoint_Write_Byte(XPRG_CMD_ENTER_PROGMODE);
 161         Endpoint_Write_Byte(NVMBusEnabled ? XPRG_ERR_OK : XPRG_ERR_FAILED);
 162         Endpoint_ClearIN();
 163 }
 164
 165 /** Handler for the XPROG LEAVE_PROGMODE command to terminate the PDI programming connection with
 166  *  the attached device.
 167  */
 168 static void XPROGProtocol_LeaveXPROGMode(void)
 169 {
 170         Endpoint_ClearOUT();
 171         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 172         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 173
 174         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 175         {
 176                 XMEGANVM_WaitWhileNVMBusBusy();
 177
 178                 /* Clear the RESET key in the RESET PDI register to allow the XMEGA to run */
 179                 XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
 180                 XPROGTarget_SendByte(0x00);
 181
 182                 /* Do it twice to make sure it takes affect (silicon bug?) */
 183                 XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
 184                 XPROGTarget_SendByte(0x00);
 185
 186                 XPROGTarget_DisableTargetPDI();
 187         }
 188         else
 189         {
 190                 TINYNVM_WaitWhileNVMBusBusy();
 191
 192                 /* Clear the NVMEN bit in the TPI CONTROL register to disable TPI mode */
 193                 XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG);
 194                 XPROGTarget_SendByte(0x00);
 195
 196                 XPROGTarget_DisableTargetTPI();
 197         }
 198
 199         Endpoint_Write_Byte(CMD_XPROG);
 200         Endpoint_Write_Byte(XPRG_CMD_LEAVE_PROGMODE);
 201         Endpoint_Write_Byte(XPRG_ERR_OK);
 202         Endpoint_ClearIN();
 203 }
 204
 205 /** Handler for the XPRG ERASE command to erase a specific memory address space in the attached device. */
 206 static void XPROGProtocol_Erase(void)
 207 {
 208         uint8_t ReturnStatus = XPRG_ERR_OK;
 209
 210         struct
 211         {
 212                 uint8_t  MemoryType;
 213                 uint32_t Address;
 214         } Erase_XPROG_Params;
 215
 216         Endpoint_Read_Stream_LE(&Erase_XPROG_Params, sizeof(Erase_XPROG_Params), NO_STREAM_CALLBACK);
 217         Erase_XPROG_Params.Address = SwapEndian_32(Erase_XPROG_Params.Address);
 218
 219         Endpoint_ClearOUT();
 220         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 221         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 222
 223         uint8_t EraseCommand;
 224
 225         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 226         {
 227                 /* Determine which NVM command to send to the device depending on the memory to erase */
 228                 switch (Erase_XPROG_Params.MemoryType)
 229                 {
 230                         case XPRG_ERASE_CHIP:
 231                                 EraseCommand = XMEGA_NVM_CMD_CHIPERASE;
 232                                 break;
 233                         case XPRG_ERASE_APP:
 234                                 EraseCommand = XMEGA_NVM_CMD_ERASEAPPSEC;
 235                                 break;
 236                         case XPRG_ERASE_BOOT:
 237                                 EraseCommand = XMEGA_NVM_CMD_ERASEBOOTSEC;
 238                                 break;
 239                         case XPRG_ERASE_EEPROM:
 240                                 EraseCommand = XMEGA_NVM_CMD_ERASEEEPROM;
 241                                 break;
 242                         case XPRG_ERASE_APP_PAGE:
 243                                 EraseCommand = XMEGA_NVM_CMD_ERASEAPPSECPAGE;
 244                                 break;
 245                         case XPRG_ERASE_BOOT_PAGE:
 246                                 EraseCommand = XMEGA_NVM_CMD_ERASEBOOTSECPAGE;
 247                                 break;
 248                         case XPRG_ERASE_EEPROM_PAGE:
 249                                 EraseCommand = XMEGA_NVM_CMD_ERASEEEPROMPAGE;
 250                                 break;
 251                         case XPRG_ERASE_USERSIG:
 252                                 EraseCommand = XMEGA_NVM_CMD_ERASEUSERSIG;
 253                                 break;
 254                         default:
 255                                 EraseCommand = XMEGA_NVM_CMD_NOOP;
 256                                 break;
 257                 }
 258
 259                 /* Erase the target memory, indicate timeout if occurred */
 260                 if (!(XMEGANVM_EraseMemory(EraseCommand, Erase_XPROG_Params.Address)))
 261                   ReturnStatus = XPRG_ERR_TIMEOUT;
 262         }
 263         else
 264         {
 265                 if (Erase_XPROG_Params.MemoryType == XPRG_ERASE_CHIP)
 266                   EraseCommand = TINY_NVM_CMD_CHIPERASE;
 267                 else
 268                   EraseCommand = TINY_NVM_CMD_SECTIONERASE;
 269
 270                 /* Erase the target memory, indicate timeout if occurred */
 271                 if (!(TINYNVM_EraseMemory(EraseCommand, Erase_XPROG_Params.Address)))
 272                   ReturnStatus = XPRG_ERR_TIMEOUT;
 273         }
 274
 275         Endpoint_Write_Byte(CMD_XPROG);
 276         Endpoint_Write_Byte(XPRG_CMD_ERASE);
 277         Endpoint_Write_Byte(ReturnStatus);
 278         Endpoint_ClearIN();
 279 }
 280
 281 /** Handler for the XPROG WRITE_MEMORY command to write to a specific memory space within the attached device. */
 282 static void XPROGProtocol_WriteMemory(void)
 283 {
 284         uint8_t ReturnStatus = XPRG_ERR_OK;
 285
 286         struct
 287         {
 288                 uint8_t  MemoryType;
 289                 uint8_t  PageMode;
 290                 uint32_t Address;
 291                 uint16_t Length;
 292                 uint8_t  ProgData[256];
 293         } WriteMemory_XPROG_Params;
 294
 295         Endpoint_Read_Stream_LE(&WriteMemory_XPROG_Params, (sizeof(WriteMemory_XPROG_Params) -
 296                                                             sizeof(WriteMemory_XPROG_Params).ProgData), NO_STREAM_CALLBACK);
 297         WriteMemory_XPROG_Params.Address = SwapEndian_32(WriteMemory_XPROG_Params.Address);
 298         WriteMemory_XPROG_Params.Length  = SwapEndian_16(WriteMemory_XPROG_Params.Length);
 299         Endpoint_Read_Stream_LE(&WriteMemory_XPROG_Params.ProgData, WriteMemory_XPROG_Params.Length, NO_STREAM_CALLBACK);
 300
 301         Endpoint_ClearOUT();
 302         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 303         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 304
 305         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 306         {
 307                 /* Assume FLASH page programming by default, as it is the common case */
 308                 uint8_t WriteCommand     = XMEGA_NVM_CMD_WRITEFLASHPAGE;
 309                 uint8_t WriteBuffCommand = XMEGA_NVM_CMD_LOADFLASHPAGEBUFF;
 310                 uint8_t EraseBuffCommand = XMEGA_NVM_CMD_ERASEFLASHPAGEBUFF;
 311                 bool    PagedMemory      = true;
 312
 313                 switch (WriteMemory_XPROG_Params.MemoryType)
 314                 {
 315                         case XPRG_MEM_TYPE_APPL:
 316                                 WriteCommand     = XMEGA_NVM_CMD_WRITEAPPSECPAGE;
 317                                 break;
 318                         case XPRG_MEM_TYPE_BOOT:
 319                                 WriteCommand     = XMEGA_NVM_CMD_WRITEBOOTSECPAGE;
 320                                 break;
 321                         case XPRG_MEM_TYPE_EEPROM:
 322                                 WriteCommand     = XMEGA_NVM_CMD_ERASEWRITEEEPROMPAGE;
 323                                 WriteBuffCommand = XMEGA_NVM_CMD_LOADEEPROMPAGEBUFF;
 324                                 EraseBuffCommand = XMEGA_NVM_CMD_ERASEEEPROMPAGEBUFF;
 325                                 break;
 326                         case XPRG_MEM_TYPE_USERSIG:
 327                                 WriteCommand     = XMEGA_NVM_CMD_WRITEUSERSIG;
 328                                 break;
 329                         case XPRG_MEM_TYPE_FUSE:
 330                                 WriteCommand     = XMEGA_NVM_CMD_WRITEFUSE;
 331                                 PagedMemory      = false;
 332                                 break;
 333                         case XPRG_MEM_TYPE_LOCKBITS:
 334                                 WriteCommand     = XMEGA_NVM_CMD_WRITELOCK;
 335                                 PagedMemory      = false;
 336                                 break;
 337                 }
 338
 339                 /* Send the appropriate memory write commands to the device, indicate timeout if occurred */
 340                 if ((PagedMemory && !(XMEGANVM_WritePageMemory(WriteBuffCommand, EraseBuffCommand, WriteCommand,
 341                                                                                                            WriteMemory_XPROG_Params.PageMode, WriteMemory_XPROG_Params.Address,
 342                                                                                                            WriteMemory_XPROG_Params.ProgData, WriteMemory_XPROG_Params.Length))) ||
 343                    (!PagedMemory && !(XMEGANVM_WriteByteMemory(WriteCommand, WriteMemory_XPROG_Params.Address,
 344                                                                                                            WriteMemory_XPROG_Params.ProgData[0]))))
 345                 {
 346                         ReturnStatus = XPRG_ERR_TIMEOUT;
 347                 }
 348         }
 349         else
 350         {
 351                 /* Send write command to the TPI device, indicate timeout if occurred */
 352                 if (!(TINYNVM_WriteMemory(WriteMemory_XPROG_Params.Address, WriteMemory_XPROG_Params.ProgData,
 353                       WriteMemory_XPROG_Params.Length)))
 354                 {
 355                         ReturnStatus = XPRG_ERR_TIMEOUT;
 356                 }
 357         }
 358
 359         Endpoint_Write_Byte(CMD_XPROG);
 360         Endpoint_Write_Byte(XPRG_CMD_WRITE_MEM);
 361         Endpoint_Write_Byte(ReturnStatus);
 362         Endpoint_ClearIN();
 363 }
 364
 365 /** Handler for the XPROG READ_MEMORY command to read data from a specific address space within the
 366  *  attached device.
 367  */
 368 static void XPROGProtocol_ReadMemory(void)
 369 {
 370         uint8_t ReturnStatus = XPRG_ERR_OK;
 371
 372         struct
 373         {
 374                 uint8_t  MemoryType;
 375                 uint32_t Address;
 376                 uint16_t Length;
 377         } ReadMemory_XPROG_Params;
 378
 379         Endpoint_Read_Stream_LE(&ReadMemory_XPROG_Params, sizeof(ReadMemory_XPROG_Params), NO_STREAM_CALLBACK);
 380         ReadMemory_XPROG_Params.Address = SwapEndian_32(ReadMemory_XPROG_Params.Address);
 381         ReadMemory_XPROG_Params.Length  = SwapEndian_16(ReadMemory_XPROG_Params.Length);
 382
 383         Endpoint_ClearOUT();
 384         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 385         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 386
 387         uint8_t ReadBuffer[256];
 388
 389         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 390         {
 391                 /* Read the PDI target's memory, indicate timeout if occurred */
 392                 if (!(XMEGANVM_ReadMemory(ReadMemory_XPROG_Params.Address, ReadBuffer, ReadMemory_XPROG_Params.Length)))
 393                   ReturnStatus = XPRG_ERR_TIMEOUT;
 394         }
 395         else
 396         {
 397                 /* Read the TPI target's memory, indicate timeout if occurred */
 398                 if (!(TINYNVM_ReadMemory(ReadMemory_XPROG_Params.Address, ReadBuffer, ReadMemory_XPROG_Params.Length)))
 399                   ReturnStatus = XPRG_ERR_TIMEOUT;
 400         }
 401
 402         Endpoint_Write_Byte(CMD_XPROG);
 403         Endpoint_Write_Byte(XPRG_CMD_READ_MEM);
 404         Endpoint_Write_Byte(ReturnStatus);
 405
 406         if (ReturnStatus == XPRG_ERR_OK)
 407           Endpoint_Write_Stream_LE(ReadBuffer, ReadMemory_XPROG_Params.Length, NO_STREAM_CALLBACK);
 408
 409         Endpoint_ClearIN();
 410 }
 411
 412 /** Handler for the XPROG CRC command to read a specific memory space's CRC value for comparison between the
 413  *  attached device's memory and a data set on the host.
 414  */
 415 static void XPROGProtocol_ReadCRC(void)
 416 {
 417         uint8_t ReturnStatus = XPRG_ERR_OK;
 418
 419         struct
 420         {
 421                 uint8_t CRCType;
 422         } ReadCRC_XPROG_Params;
 423
 424         Endpoint_Read_Stream_LE(&ReadCRC_XPROG_Params, sizeof(ReadCRC_XPROG_Params), NO_STREAM_CALLBACK);
 425
 426         Endpoint_ClearOUT();
 427         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 428         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 429
 430         uint32_t MemoryCRC;
 431
 432         if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
 433         {
 434                 uint8_t CRCCommand;
 435
 436                 /* Determine which NVM command to send to the device depending on the memory to CRC */
 437                 switch (ReadCRC_XPROG_Params.CRCType)
 438                 {
 439                         case XPRG_CRC_APP:
 440                                 CRCCommand = XMEGA_NVM_CMD_APPCRC;
 441                                 break;
 442                         case XPRG_CRC_BOOT:
 443                                 CRCCommand = XMEGA_NVM_CMD_BOOTCRC;
 444                                 break;
 445                         default:
 446                                 CRCCommand = XMEGA_NVM_CMD_FLASHCRC;
 447                                 break;
 448                 }
 449
 450                 /* Perform and retrieve the memory CRC, indicate timeout if occurred */
 451                 if (!(XMEGANVM_GetMemoryCRC(CRCCommand, &MemoryCRC)))
 452                   ReturnStatus = XPRG_ERR_TIMEOUT;
 453         }
 454         else
 455         {
 456                 /* TPI does not support memory CRC */
 457                 ReturnStatus = XPRG_ERR_FAILED;
 458         }
 459
 460         Endpoint_Write_Byte(CMD_XPROG);
 461         Endpoint_Write_Byte(XPRG_CMD_CRC);
 462         Endpoint_Write_Byte(ReturnStatus);
 463
 464         if (ReturnStatus == XPRG_ERR_OK)
 465         {
 466                 Endpoint_Write_Byte(MemoryCRC >> 16);
 467                 Endpoint_Write_Word_LE(MemoryCRC & 0xFFFF);
 468         }
 469
 470         Endpoint_ClearIN();
 471 }
 472
 473 /** Handler for the XPROG SET_PARAM command to set a XPROG parameter for use when communicating with the
 474  *  attached device.
 475  */
 476 static void XPROGProtocol_SetParam(void)
 477 {
 478         uint8_t ReturnStatus = XPRG_ERR_OK;
 479
 480         uint8_t XPROGParam = Endpoint_Read_Byte();
 481
 482         /* Determine which parameter is being set, store the new parameter value */
 483         switch (XPROGParam)
 484         {
 485                 case XPRG_PARAM_NVMBASE:
 486                         XPROG_Param_NVMBase = Endpoint_Read_DWord_BE();
 487                         break;
 488                 case XPRG_PARAM_EEPPAGESIZE:
 489                         XPROG_Param_EEPageSize = Endpoint_Read_Word_BE();
 490                         break;
 491                 case XPRG_PARAM_NVMCMD_REG:
 492                         XPROG_Param_NVMCMDRegAddr = Endpoint_Read_Byte();
 493                         break;
 494                 case XPRG_PARAM_NVMCSR_REG:
 495                         XPROG_Param_NVMCSRRegAddr = Endpoint_Read_Byte();
 496                         break;
 497                 default:
 498                         ReturnStatus = XPRG_ERR_FAILED;
 499                         break;
 500         }
 501
 502         Endpoint_ClearOUT();
 503         Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
 504         Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
 505
 506         Endpoint_Write_Byte(CMD_XPROG);
 507         Endpoint_Write_Byte(XPRG_CMD_SET_PARAM);
 508         Endpoint_Write_Byte(ReturnStatus);
 509         Endpoint_ClearIN();
 510 }
 511
 512 #endif
 513