Problems with HS-UART driver for ACPI\VEN_INT&DEV_3512 device used in Apolo Lake board on Windows 10 64 bits

[DScat]

Hello All,

I´m working in a program to read/write serial COM devices. It works correctly with any COM ports and with USB-COM devices, but in this board using UartSub Device drivers from Intel, I have detected some problems in the next Win32 API methods that I use from Windows API (https://docs.microsoft.com/en-us/previous-versions/ms810467(v=msdn.10)):

• Problem 1: After opening correctly COM port I´m trying to call SetupComm(hCom, 1024, 1024); with valid handle returned but it fails with next error: SetupComm failed with error 31: A device attached to the system is not functioning.
• Problem 2: When calling ClearCommError(hCom, &dwErrorFlags, &ComStat) and check value returned in ComStat.cbInQue from COMSTAT struct, sometimes in cbInQue the devices is returning invalid values (83886080 bytes or -1460703136 bytes ...)

Any ideas or additional tests to do ? I found for new drivers but it seems this is the lastest. The source code used in my program is based on samples of Microsoft and you can see a similar reference in this page: https://wangbaiyuan.cn/en/c-serial-communication-write-reading-2.html

Thank you in advance for your help

Best Regards

Jorge

PS: I attached a picture with COM devices that apparently are installed correctly in Device Manager and we can open/close port correctly.

[Zahar_K_]

Hello Jorge!

Did you resolve this issue? How?

We have the same problem on our board with Skylake and x64 Windows 10.

Thanks!

Best regards, Danilov Igor.