How to Solve FT232RQ 'Device Descriptor Request Failed' Error
How to Solve FT232RQ 'Device Descriptor Request Failed' Error
When you encounter the "Device Descriptor Request Failed" error with an FT232RQ chip, it typically means that there is an issue in the communication between your computer's USB port and the FTDI chip, often leading to the device not being recognized properly. This issue can arise from several causes such as driver problems, hardware conflicts, or USB port issues.
Here’s a step-by-step guide to help you troubleshoot and resolve the "Device Descriptor Request Failed" error.
1. Check USB Port and Cable
The first step is to verify the physical connection between your FT232RQ device and the computer:
Try a different USB port: Sometimes, the issue could be related to a specific USB port. Try plugging the device into another USB port on your computer, preferably one directly connected to the motherboard (as opposed to a USB hub). Check the USB cable: Ensure the cable you're using is not faulty. A damaged cable may cause communication problems. If possible, test with a different USB cable.2. Check Device Manager (Windows)
In Windows, the "Device Descriptor Request Failed" error typically appears in Device Manager as a yellow triangle warning next to your FT232RQ device. Here’s how to check and update the Drivers :
Open Device Manager (you can search for it in the Start menu). Locate the FT232RQ device under Universal Serial Bus Controllers or Other Devices. Right-click on the device and select Properties. Under the General tab, if the error message says "This device cannot start (Code 10)," it indicates a problem with the device installation.3. Reinstall or Update the FTDI Drivers
The most common reason for this error is missing or outdated drivers. To fix this:
Uninstall the current driver: In Device Manager, right-click on the FT232RQ device and select Uninstall device. Check the box to delete the driver software for this device, if prompted. Install the latest FTDI drivers: Go to the FTDI website and download the latest drivers for your operating system. Follow the installation instructions provided by FTDI to install the driver.4. Check for Hardware Issues
If reinstalling the drivers does not work, there could be a hardware issue with your FT232RQ chip or the device it is attached to:
Test the FT232RQ on another computer: If the device works on another computer, the issue may be specific to your current system. Check for damaged components: Inspect the FT232RQ chip and the circuit it is on for any visible signs of damage (such as burnt areas or loose connections). Test with a different FT232RQ device: If possible, test another FT232RQ device on your computer to see if the issue persists.5. Power Management Settings
In some cases, Power Management settings can interfere with USB devices. To adjust these settings:
Open Device Manager, right-click on your USB Root Hub under Universal Serial Bus Controllers , and select Properties. Under the Power Management tab, uncheck Allow the computer to turn off this device to save power. Click OK and restart your computer.6. Disable USB Selective Suspend
Sometimes, the USB selective suspend feature can cause issues with devices like the FT232RQ. Here's how to disable it:
Open Control Panel and go to Power Options. Click on Change plan settings next to your current power plan. Select Change advanced power settings. Expand the USB settings section and set USB selective suspend setting to Disabled. Click Apply and OK, then restart your computer.7. BIOS/UEFI Settings
Rarely, a misconfiguration in the BIOS or UEFI can cause USB issues. To rule this out:
Restart your computer and enter the BIOS/UEFI settings (usually by pressing a key like F2, Del, or Esc during boot). Look for settings related to USB Configuration and ensure that Legacy USB Support is enabled. Save your changes and exit the BIOS/UEFI.8. Update Operating System
In some cases, outdated operating system files or USB stack issues can cause communication problems with devices like the FT232RQ. Make sure your operating system is fully updated:
On Windows, go to Settings > Update & Security and check for any available updates. On macOS, go to System Preferences > Software Update.9. Test with FTDI’s FT_PROG Utility
FTDI provides a utility called FTPROG that can help diagnose and reset your FT232RQ device. Download and install FTPROG from the FTDI website, then:
Launch FT_PROG and scan for your device. If the device appears, you can attempt to program it again. If it doesn't appear, there may be a more serious issue with the hardware.Conclusion
By following these steps, you should be able to diagnose and fix the "Device Descriptor Request Failed" error with your FT232RQ device. The most common issues are related to faulty drivers, USB connection problems, or power settings. If the problem persists, it could indicate a deeper hardware issue with either the FT232RQ chip or the USB port itself.
If none of the steps resolve the issue, consider reaching out to FTDI support or the manufacturer of the device for further assistance.
