CSR DFU parser

010 Editor utilities for parsing the CSR DFU (Device Firmware Upgrade) file format of CSR Bluetooth chips.

Contents

• An 010 Editor template for parsing the binary structure of a CSR DFU file.
• An 010 Editor script for extracting the files from the File System area of CSR DFU files.

Tip

Extracted .pcm/.raw audio files may be converted to WAV using the following command:

ffmpeg -f s16be -ar 16k -ac 1 -i example.pcm example.wav

Resources

DFU file format

• CSR tools by Andrea Bittau

• BlueCore01 DFU File Format Specification

• An incomplete list of devices using CSR DFU

Disassembly

After using the parser to extract the firmware's text section from the DFU's Stack Software area, you may disassemble it using one of the following disassemblers:

• Radare2's XAP disassembler, also by Andrea Bittau

• IDA, using this processor module