HID SPI device error

Question

I plan to use HID SPI for communication between AP(window11) and CM4(FreeRTOS). CM4 plays the role of a sensor collection.

Because the window system already provides various sensor classes, I only configured ACPI files. I developed the sensor device driver in CM4.

However, during the testing process, I found that the RST function of ACPI did not be called during the startup process. According to the HID SPI protocol, during the boot process, the window will call the RST function to restore the sensor device to its initialization state, but my RST function has not been called.

Can someone provide some debugging methods? thanks

Answer 1

Hello Hosson,

Thank you for your question and for reaching out with your question today.

When you're facing issues with the RST function not being called during the startup process of your HID SPI sensor device driver, there are a few debugging methods you can try to identify and resolve the problem:

1. Check ACPI configuration: Ensure that your ACPI configuration is correctly set up. Verify that the ACPI files related to your sensor device are properly installed and registered in the Windows system. Double-check the ACPI device and method names, as any discrepancies can prevent the RST function from being called.
2. Enable ACPI debugging: You can enable ACPI debugging to gather more detailed information about the initialization process. Modify the boot configuration to enable ACPI debugging messages and check if any relevant logs or error messages are generated during the boot process. This can help identify any issues with the ACPI setup or the invocation of the RST function.
3. Review device driver code: Review your device driver code for any potential issues that might prevent the RST function from being called. Make sure you have correctly implemented the necessary functions, interfaces, and callbacks as per the HID SPI protocol. Check for any conditional statements or dependencies that might inadvertently skip the invocation of the RST function.
4. Verify hardware connections: Ensure that the hardware connections between your AP (Windows 11) and CM4 (FreeRTOS) are properly established. Check for any loose or incorrect connections that could disrupt the communication between the devices. Validate the wiring, pin configurations, and voltage levels to confirm they align with the requirements of the HID SPI protocol.
5. Test with a simple implementation: To isolate the issue, you can try implementing a simplified version of the driver with only the necessary functions and minimal dependencies. This can help identify if any complex code or dependencies are causing the RST function not to be called. Gradually add the additional functionality and components while monitoring if the RST function continues to be invoked.
6. Consult relevant documentation and forums: Check the official documentation of the HID SPI protocol, ACPI specifications, and any other relevant resources provided by the hardware manufacturers. Look for any specific requirements or considerations when implementing the RST function. Additionally, you can seek assistance and insights from developer forums or communities where others may have encountered similar issues.

If you have access to hardware debugging tools or a JTAG/SWD debugger, you can also use them to observe the system behavior during startup and pinpoint any issues with the RST function invocation.

Remember to keep backups of your code and configurations before making any changes, and consider consulting with experts or contacting the hardware manufacturers for further guidance if needed.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

If the reply was helpful, please don’t forget to upvote or accept as answer.