Is it possible that tests be conducted using Cypress provided host applications? Would it be possible for you to share your application code? And share the .DMP (dump) file?
There aren't any applications involved, it's just windows 10 detecting the USB device and starting the cyusb.sys/cyusb3.sys driver. I'd be happy to share the dump files. I'm having a little trouble getting things to post. Here are the debug output logs from the dump files. I'll try adding the .dmp files in additional posts after this.
Sampath - The dump files are just too big and the upload to the community keeps timing out. Is there another way I can get them to you?
I am extremely sorry for this inconvenience. Can you kindly share to us using a link?
- Please share the .DMP file through a drive link.
- Have you tried uninstalling the CYUSB.SYS driver and installing the latest version (22.214.171.124) CYUSB3.SYS driver?
I've continued debugging and I've learned something very interesting.
The original cyusb.sys driver does have some kind of blue screen crash problem under hot-plug conditions, however, cyusb3.sys apparently does not. There is a Windows 10 behavior (bug?) that may fool people into thinking it does.
In my system, originally I had uninstalled the cyusb.sys driver, and installed the cyusb3.sys driver. You can query windows using this command (in an admin privileged command prompt) to find out what drivers are installed, and what .inf files they are using:
dism /online /get-drivers /format:table > c:\drivers.txt
On my system, there were no references to cyusb.sys, and two references to cyusb3.sys (one for my device, and one for miniprog3.)
But, if you look at the crash logs that I posted above, down in the listing of processes running in memory, the driver listed was cyusb.sys in all cases where the system crashed.
I plugged my device in to the system several times and sure enough, at random intervals the driver that was started was cyusb.sys, not cyusb3.sys. The OS was getting confused about which driver to start. When it starts cyusb.sys, there is a chance of a blue screen from that binary.
I went on to exorcise the ghosts and demons from the operating system using brute force methods:
1. I went to Device Manager and set "View->Show Hidden Devices" to checked. There were several entries present for my device. I removed each of them by right clicking and uninstalling them from the system.
2. I used the following command to remove each of the installed Cypress drivers from the system (using the admin privileged command prompt again.)
pnputil.exe -d oemxxx.inf
Where the xxx is the number of the inf file from the dism command above for the driver I wanted to remove.
3. I manually entered the c:\Windows\System32\drivers\ folder and removed both cyusb.sys and cyusb3.sys
4. I then performed a reinstall of the cyusb3.sys driver.
After a couple hundred hot-plug cycles, no crashes.
So I don't think there's anything for the Cypress' folks to look into since it appears to be a cyusb.sys driver problem only.
Thanks Sampath and Srinath for taking the time to look at this.