text: // This is the original command.h file available from the atmel
  // website (file: AVR068.zip)
  //
  //**** ATMEL AVR - A P P L I C A T I O N   N O T E  ************************
  //*
  //* Title:        AVR068 - STK500 Communication Protocol
  //* Filename:     command.h
  //* Version:      1.0
  //* Last updated: 31.01.2005
  //*
  //* Support E-mail:    avr@atmel.com
  //*
  //**************************************************************************
  #define STK500_XTAL			7372800
  
  // *****************[ STK message constants ]***************************
  
  #define MESSAGE_START                       0x1B        //= ESC = 27 decimal
  #define TOKEN                               0x0E
  
  // *****************[ STK general command constants ]**************************
  
  #define CMD_SIGN_ON                         0x01    //+
  //#define CMD_SET_PARAMETER                   0x02    //+
  //#define CMD_GET_PARAMETER                   0x03    //+
  //#define CMD_SET_DEVICE_PARAMETERS           0x04
  //#define CMD_OSCCAL                          0x05
  #define CMD_LOAD_ADDRESS                    0x06    //+
  //#define CMD_FIRMWARE_UPGRADE                0x07
  
  
  // *****************[ STK ISP command constants ]******************************
  
  #define CMD_ENTER_PROGMODE_ISP              0x10    //+
  #define CMD_LEAVE_PROGMODE_ISP              0x11    //+
  #define CMD_CHIP_ERASE_ISP                  0x12    //+
  #define CMD_PROGRAM_FLASH_ISP               0x13    //+
  #define CMD_READ_FLASH_ISP                  0x14    //+
  //#define CMD_PROGRAM_EEPROM_ISP              0x15
  //#define CMD_READ_EEPROM_ISP                 0x16
  //#define CMD_PROGRAM_FUSE_ISP                0x17
  //#define CMD_READ_FUSE_ISP                   0x18
  //#define CMD_PROGRAM_LOCK_ISP                0x19
  //#define CMD_READ_LOCK_ISP                   0x1A
  //#define CMD_READ_SIGNATURE_ISP              0x1B
  //#define CMD_READ_OSCCAL_ISP                 0x1C
  #define CMD_SPI_MULTI                       0x1D    //*
  
  // *****************[ STK PP command constants ]*******************************
  
  //#define CMD_ENTER_PROGMODE_PP               0x20
  //#define CMD_LEAVE_PROGMODE_PP               0x21
  //#define CMD_CHIP_ERASE_PP                   0x22
  //#define CMD_PROGRAM_FLASH_PP                0x23
  //#define CMD_READ_FLASH_PP                   0x24
  //#define CMD_PROGRAM_EEPROM_PP               0x25
  //#define CMD_READ_EEPROM_PP                  0x26
  //#define CMD_PROGRAM_FUSE_PP                 0x27
  //#define CMD_READ_FUSE_PP                    0x28
  //#define CMD_PROGRAM_LOCK_PP                 0x29
  //#define CMD_READ_LOCK_PP                    0x2A
  //#define CMD_READ_SIGNATURE_PP               0x2B
  //#define CMD_READ_OSCCAL_PP                  0x2C
  
  //#define CMD_SET_CONTROL_STACK               0x2D
  
  // *****************[ STK HVSP command constants ]*****************************
  
  //#define CMD_ENTER_PROGMODE_HVSP             0x30
  //#define CMD_LEAVE_PROGMODE_HVSP             0x31
  //#define CMD_CHIP_ERASE_HVSP                 0x32
  //#define CMD_PROGRAM_FLASH_HVSP              0x33
  //#define CMD_READ_FLASH_HVSP                 0x34
  //#define CMD_PROGRAM_EEPROM_HVSP             0x35
  //#define CMD_READ_EEPROM_HVSP                0x36
  //#define CMD_PROGRAM_FUSE_HVSP               0x37
  //#define CMD_READ_FUSE_HVSP                  0x38
  //#define CMD_PROGRAM_LOCK_HVSP               0x39
  //#define CMD_READ_LOCK_HVSP                  0x3A
  //#define CMD_READ_SIGNATURE_HVSP             0x3B
  //#define CMD_READ_OSCCAL_HVSP                0x3C
  
  // *****************[ STK status constants ]***************************
  
  // Success
  #define STATUS_CMD_OK                       0x00
  
  // Warnings
  //#define STATUS_CMD_TOUT                     0x80
  //#define STATUS_RDY_BSY_TOUT                 0x81
  //#define STATUS_SET_PARAM_MISSING            0x82
  
  // Errors
  //#define STATUS_CMD_FAILED                   0xC0
  //#define STATUS_CKSUM_ERROR                  0xC1
  //#define STATUS_CMD_UNKNOWN                  0xC9
  
  // *****************[ STK parameter constants ]***************************
  #define PARAM_BUILD_NUMBER_LOW              0x80
  #define PARAM_BUILD_NUMBER_HIGH             0x81
  #define PARAM_HW_VER                        0x90
  #define PARAM_SW_MAJOR                      0x91
  #define PARAM_SW_MINOR                      0x92
  #define PARAM_VTARGET                       0x94
  #define PARAM_VADJUST                       0x95
  #define PARAM_OSC_PSCALE                    0x96
  #define PARAM_OSC_CMATCH                    0x97
  #define PARAM_SCK_DURATION                  0x98
  #define PARAM_TOPCARD_DETECT                0x9A
  #define PARAM_STATUS                        0x9C
  #define PARAM_DATA                          0x9D
  #define PARAM_RESET_POLARITY                0x9E
  #define PARAM_CONTROLLER_INIT               0x9F
  
  // *****************[ STK answer constants ]***************************
  
  #define ANSWER_CKSUM_ERROR                  0xB0
  