/*

 ** This file is part of fsusb_picdem

 **

 ** fsusb_picdem is free software; you can redistribute it and/or

 ** modify it under the terms of the GNU General Public License as

 ** published by the Free Software Foundation; either version 2 of the

 ** License, or (at your option) any later version.

 **

 ** fsusb_picdem is distributed in the hope that it will be useful, but

 ** WITHOUT ANY WARRANTY; without even the implied warranty of

 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 ** General Public License for more details.

 **

 ** You should have received a copy of the GNU General Public License

 ** along with fsusb_picdem; if not, write to the Free Software

 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 ** 02110-1301, USA

 */

 #ifndef __BOOTLOAD_H__

 #define __BOOTLOAD_H__

 /*

  * Command packets:

  *

  * 0x00: command

  * 0x01: data length (usually; different action for some commands!)

  * 0x02: address bits 7..0

  * 0x03: address bits 15..8

  * 0x04: address bits 23..16 (upper bits always zero)

  * 0x05: data[0]

  * 0x06: data[1]

  * 0x07: data[2]

  * 0x??: ...

  * 0x3f: data[BL_DATA_LEN-1]

  */

 typedef unsigned char byte;

 #define BL_PACKET_LEN 64

 #define BL_HEADER_LEN  5 // command, len, low, high, upper

 #define BL_DATA_LEN   (BL_PACKET_LEN - BL_HEADER_LEN)

 enum {

   READ_VERSION    = 0x00, // Works

   READ_FLASH      = 0x01, // Works

   WRITE_FLASH     = 0x02, // Works

   ERASE_FLASH     = 0x03, // Works

   READ_EEDATA     = 0x04, // NOT IMPLEMENTED

   WRITE_EEDATA    = 0x05, // NOT IMPLEMENTED

   READ_CONFIG     = 0x06, // NOT IMPLEMENTED

                           // (but in current firmware READ_FLASH works

   WRITE_CONFIG    = 0x07, // NOT TESTED

   UPDATE_LED      = 0x32, // NOT IMPLEMENTED

   RESET           = 0xFF  // NOT IMPLEMENTED

 };

 typedef union _bl_packet {

   byte _byte[64];

   struct {

     byte command;

     byte len;

     struct {

       byte low;

       byte high;

       byte upper;

     } address;

     byte data[BL_DATA_LEN];

   };

 } bl_packet;

 #endif /* __BOOTLOAD_H__ */