Kinetis MicrocontrollersのトピックMK66 usb_device_hid_generic sometimes fails when going through a usb hub

MK66 usb_device_hid_generic sometimes fails when going through a usb hub

ryan_pearson — Thu, 03 Aug 2023 14:14:04 GMT

Hi,

I have a project based on the usb_device_hid_generic example for an MK66. Using SDK_2.6.0_FRDM_K66F. When communicating with my device through a PC, I typically don't have an issue. When my device is connected via a USB hub, sometimes a HID communication will fail. This has happened with multiple hubs. Has anyone seen this issue and have any suggestions? Thank you

Re: MK66 usb_device_hid_generic sometimes fails when going through a usb hub

Miguel04 — Thu, 03 Aug 2023 18:03:54 GMT

Hi @ryan_pearson

USB hubs have disadvantages and could be the cause of your issue.

Not enough power supplied to the MCU, add latency to the usb port in PC and could affect performance in data transfer speed.

I highly recommend you to connect the MCU directly to the pc instead of the hub or while debuging disconnect other unused devices on the hub.

Best Regards,Miguel.