HID Recieve OUT Endpoint Confusion

[samsamm777]

I'm a little confused on how the tud_hid_set_report_cb should be working, when in relation to receiving reports on the OUT endpoint. The callback fires just fine when I send a report from the host. Good. The buffer length is also correct. However when it comes to reading the payload, ie any data after the first byte (reportID), its not there. I just get 0 on the 2nd byte.

The report buffer should simply be 0x2, 0x4 which is seems is correct in the buffer variable watcher. But not in the actual buffer array. Im just a bit confused. Anyone have any advice? Hopefully screenshot will help.

Thanks!

[hathach]

can you provide

• PC OS, any tools you use
• hardware: which mcu, board
• firmware: which example you are running. If it is not stock one, then make one based on them
• how to reproduce: which exactly did you do to send the report on host side (command/tools ?)

[chegewara]

Sorry for my 2 cents, but:

1. you have report_id in callback, and it is 0 on screenshot
2. buffer[0], which you assign to reportId is in fact 0x20, not 0x02
3. report type is HID_REPORT_TYPE_INVALID