islandcontroller / fiberaudio-108

A low-cost USB audio interface with S/PDIF optical output, based on the Cmedia CM108 ASIC.

👋 Hi there!

I'm island - a hardware and software engineer, and an open-source enthusiast!

My academic background is a Master's degree in the field of microelectronic systems and digital control at the Hamburg University of Applied Sciences and the FH Westküste in Germany. My thesis project covered the topics of RISC-V processor architecture and fault-tolerant hardware design.

• B.Sc. Electronics Engineering and Information Technology (IuE)
• M.Sc. Microelectronic Systems (MES)

As for my professional background, I work as an Embedded Systems Development Engineer at a major german industrial drive technology manufacturer, and specialise in software development for functional safety applications, high-speed communication interfaces and automated testing.

• Safety-critical systems development (IEC 61508, SIL3/PLe)
• Custom USB, CAN and Ethernet communication stack implementations
• Traceable, automated testing using Hardware-In-The-Loop

Check my repositories or the cards below for my favourite free-time projects, or the stars tab for projects I support and enjoy!

fiberaudio-108's Issues

"No devices found" when trying to read/program/erase.

Hi,

I am having trouble using your tool to program the EEPROM of a CM108B in windows.
I can not seem to find my USB audio device when using your script.
Example:
python .\cm108ah.py erase
Entering ERASE mode.
No devices found.

What can I do to resolve this?

I have confirmed operation of the device with a speaker and microphone in windows. As well as buttons/GPIO with an USB HID sniffer.

My understanding of the CM108B IC is that it is almost entirely the same as the CM108AH but with improved USB codec and internal crystal so your script should be able to talk to the EEPROM.