Good day
I've been dealing with this problems for some times.
A board, utilizing the AT91 Chipset from Microchip, has a direct USB Port. This USB Port is used for Debugging, setting SN and all the other configurations on this board.
I power on the board, I plug in the USB cable and I will get a COM Port assigned. Normally we have this port on COM6 to keep the process streamlined.
Out of nowhere, this communication simply stopps. I still have the COM Port. I can still open the port up in a terminal (TeraTerm). But I cannot get an answer. If I enable Echo, I get a noticible delay for my input, which doesnt happen, if its working perfectly.
Summary:
- Win7 worked great, update to Win10 did bring out the issue. But I've tried using a new Win7 machine and still getting the same issue.
- We might suspect windows updates. It gets more frequent since couple months
- It can stop from one moment to the other (but the board still works perfectly on another working computer
- Working & Not working shows to use the following driver: usbser.sys 10.0.19041.2130
- HW ID USB\VID_1FC5&PID_0001
- Works 100% of the time on Linux (Not a solution for our use case)
Any pointers to how I can debug this and find the issue? Maybe a custom inf driver?
I've tried:
- Uninstalled the device, deleting the driver
- Tried installing some driver from Microchip in regards to AT91, but most wont work
- Complete Powerdown of the system (pulled the plug) and restartet
Workaround: In the past, I've always managed to find a workaround with one of the following two: **- ZADIG and forced a new USB CDC driver onto this device
- Windows Recovery tool to a date which everything worked perfectly** But currently only the recovery is dooing its job. But it takes between 30-60min and it can happen within hours again.
Many thanks.
