Hardware Projects » E1/T1 Hardware Interface (including icE1usb)

This is the icE1usb unit I've been using for all my E1 related development during the past week or so. It has serial number "dc697407e7881531"

I have been using DFU extensively to flash the firmware (-a1). I've not flashed any gateware during the past weeks, nor have I ever tried to install the bootlodaer itself. That should be in pristine condition from when this unit arrived (the first prototpye in the 'real' enclosure, before the production run).

Until yesterday, I was able to go into DFU mode both by pressing the button as well as via the 'dfu-util -e' switch.

Today, the first time I tried to switch via 'dfu-util -e', it failed to re-enumerate. Also, it ddoesn't enumerate at all when pressing the button at power-up. There is also no single character printed to the serial console when booting with button pressed.

I can still use it with the last firmware I flashed via DFU, but I can no longer upgrade it.

I'll keep the device as-is for now and not try any further operations that might modify the internal state.

Any ide what might have happened here?