We've recently become aware of an issue with a new update to Windows 10 and our CP210x VCP "Universal" Driver for Windows 10, driver version v10.1.1. When attempting to install the driver, an error is given by Windows that states "A service installation section in this INF is invalid." This occurs because Windows has changed drive INF requirements slightly, and our current driver's INF file does not meet these requirements.
We currently are working to fix this issue, although due to testing and recertification requirements, we do not expect the fixed driver to be available until mid-June.
A work-around exists currently, but it involves manually editing the .INF file for the driver. This causes another issue - the driver is no longer signed in this case, so the driver must be forced to install, and Windows will show a warning that the driver is unsigned.
Firstly, the work-around is as follows:
Download the Windows 10 Universal driver from here: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
Edit the .inf file with this driver, performing the following modifications:
On or around line 118, change/edit
ServiceBinary = %13%\silabser.sys
ServiceBinary = %12%\silabser.sys
And on or around line 160, change/edit
Silabser_CopyFiles_FileListSection = 13 ; Driver package's Driver Store directory (%WINDIR%\System32\DriverStore\FileRepository ) (was 12 Drivers directory (%SystemRoot%\system32\drivers))
Silabser_CopyFiles_FileListSection = 12 ; Driver package's Driver Store directory (%WINDIR%\System32\DriverStore\FileRepository ) (was 12 Drivers directory (%SystemRoot%\system32\drivers))
I.e. replace every 13 in the file with 12.
Once these changes are made, attempt to re-install the driver. A warning will be shown that the driver is unsigned, but you can ignore this for now. If you do not receive a warning issue, or if Windows refuses to install the unsigned driver (you may get an error about the hash being invalid), you can disable driver signing enforcement by following these instructions: https://www.maketecheasier.com/install-unsigned-drivers-windows10/
Alternatively, rolling back to a previous build of Windows also resolves the issue.
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Note: If you are not the manufacturer of the device you are troubleshooting, note that Silicon Labs does not support end users directly. Please contact your product manufacturer for support. For more information, please see the following knowledge base article: http://community.silabs.com/t5/Silicon-Labs-Knowledge-Base/Troubleshooting-a-Product-Using-a-CP210x-USB-to-UART-Bridge/ta-p/131318
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Before following the steps below, please take some time to read the generic tips for troubleshooting and asking questions from this post:
[Note2] If you are not the manufacturer of the device you are troubleshooting, note that Silicon Labs does not support end users directly. Please contact your product manufacturer for support. For more information, please see the following knowledge base article:
Following steps are considered as additional to information described from above. When you will post a question regarding VCP driver for Mac OS, please provide some information as below:
1) The SCH/Layout of your board if It is your custom design (eg: not Silicon Labs' EK).
2) The part number and the VID/PID of the part that you are using.
3) The output of the commands below (make sure your board is plugged in because the driver will not be loaded if there is no device attached to your system):
Get Mac Version: $ sw_vers
For Big Sur: $ systemextensionsctl list | grep -iE '(silabs|cp210x)'
For Older Mac OS (ex: Catalina): $ kextstat | grep -iE '(silabs|cp210x)'
List USB devices: $ ls /dev/cu.*
4) Your test code or scripts if any that you are using and have the issue with.