Firmware file format (.gdf)

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GD motor drive firmware file format with file extension .gdf contains embedded software for most of devices based on GraniteCore G2.0 devices (ARGON) and later. Firmware file is generated by makefirmware utily.

File format byte by byte

All multibyte integers are stored LSB first.

Header

IDString - 4 bytes, always="GDFW"

BLFileVersion - 2 bytes, current=300

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


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