Firmware file format (.gdf)

File format byte by byte

All multibyte integers are stored LSB first.

GDF version 300

Header

IDString - 4 bytes, always="GDFW"

BLFileVersion - 2 bytes, value=300

TargetDriveType - 2 bytes, Argon=4000, Ion=11000, Atomi=14000

HostFWbytes - 4 bytes, number of bytes for STM32 CPU

GCFWbytes - 4 bytes, number of bytes for GraniteCore CPU or 0xffffffff if not included

Data

Data of HostFW begins. Amount of bytes is HostFWbytes

Data of GCFW begins. Amount of bytes is GCFWbytes

File checksum

FileCksum - 4 bytes calculated from the current file. Simply sum of all unsigned bytes in file except CKSum itself

GDF version 400 - draft

Header

Version 400 described below:

        /* GDF version 400 format
         * ----------------------
         *
         * Binary file contents
         * --------------------
         *
         * bytes  meaning:
         *
         * 4	ASCII string = "GDFW"
         * 2	version = 400
         * 2	backwards compatible version = 400
         * 4	target device type ID
         * 4	number of data chunks in file = N
         *
         * repeat N times:
         * 4	data chunk type
         * 4	data chunk option bits
         * 4	data chunk size in bytes=S
         * S	data
         * end of repeat
         *
         * 4	file's CRC-32
         *
         * data chunk types
         * ----------------
         * 100=main MCU FW binary, S=any
         * 101=main MCU FW unique identifier number, S=4
         * 200=secondary MCU FW binary, S=any
         *
         * data chunk option bits
         * ----------------------
         * bit 0: if 1, GDF loading application must support/understand the chunk type to use this file
         *
         */

For practical reading software implementation, see devicedeployment.c from SimpleMotion library.

In no event the Product Information or parts hereof shall be regarded as guarantee of conditions or characteristics. The Product Information or any part thereof may also not be regarded as a warranty of any kind. No liability of any kind shall be assumed by Author with respect to Product Information or any use made by you thereof, nor shall Author indemnify you against or be liable for any third party claims with respect to such information or any use thereof.

As content of this Wiki may be edited by user community, Granite Devices Oy or it's affiliates do not take any responsibility of the contents of this Wiki. Use information at your own risk. However, Granite Devices staff attempts to review all changes made to this Wiki and keep information trustworthy.

Without written consent, Granite Devices' Products or Intellectual Property shall not be used in situations or installations where living beings, material property, or immaterial property could be harmed by the operation, features or failures of Product. Products may only be used in a way where hazards like moving parts, electric shock, laser radiation, or fire can't be realized even if the content of this Wiki would suggest otherwise.