usb-protocols.txt

18d1:db00 - lpcboot / m3boot
----------------------------
- provides a pair of USB bulk endpoints, IN and OUT
- write a three word (32b-LE) command sequence ( MAGIC, CMD, ARG)
  - MAGIC is 0xDB00A5A5
  - see below for CMD
  - ARG should be zero if not specified
- read a two word (32b-LE) response ( MAGIC, STATUS)
  - MAGIC is 0xDB00A5A5
  - nonzero STATUS is failure
- read or write payload, as required

- commands
  - write to flash: CMD='W', ARG=size
  - write to RAM (and execute): CMD='X', ARG=size
  - erase flash: CMD='E'
  - reboot: CMD='R'
  - start code in flash: CMD='A'
  - query device info: CMD='Q'

struct device_info {
        char part[16];		/* "LPC1343", "STM32F103", etc */
        char board[16];		/* "M3DEBUG", "TESTBOARD123", etc */
        uint32_t version;	/* protocol version: 0x0001000 -> V1.0 */
        uint32_t ram_base;	/* start of SRAM */
        uint32_t ram_size;	/* length of SRAM (minus 1K bootloader workspace) */
        uint32_t rom_base;	/* start of FLASH (after 4K bootloader) */
        uint32_t rom_size;	/* length of FLASH (minus 4K bootloader)
        uint32_t ununsed0;	
        uint32_t ununsed1;
        uint32_t ununsed2;
};


18d1:db03 - remote swdp
-----------------------
- provides a pair of USB bulk endpoints, IN and OUT
- see include/protocol/rswdp.h for details

18d1:db05 - usb console
-----------------------
- provides a pair of USB bulk endpoints, IN and OUT
- console output (device to host) provided via BULK IN
- console input (host to device) provided via BULK OUT (format TBD)

18d1:db04 - remote swdp + console
---------------------------------
- interface 0 provides remote swdp
- interface 1 provides usb console