USB Host HID problem with keyboards

[AAgha]

Hi

Im using stm32f4 discovery board to initial keyboard but when i connect the keyboard to board it detects the keyboard but didnt send any information.

I change the keyboard and use microsoft curve keyboard 3000 and nothing changed

Im using STM32CUBE_FW_F4_V1.24.0 library and also try the pavel_a solution but nothing happend just i can identify keyboard and initialize it but no data exchange!!!

Im already tired of fixing this issue :(

I would appreciate for any suggestion

regards

[waclawek.jan]

Try a different keyboard - in fact, try as many different keyboards as you can find/borrow.

Other than that, it's debugging as usually, i.e. you have to develop a deep understanding of the involved hardware, software and protocols, observe the actual behaviour using all available means e.g. logic/bus analyzer, debugger, instrumented code; compare to the expected behaviour, develop hypotheses for the observed deviation in behaviour, develop methods to prove/disprove them, etc. all that stuff.

JW

[AAgha]

thanks for your answer

i check it again and start to debug

 case HID_GET_DATA:

  USBH_InterruptReceiveData(phost, HID_Handle->pData,

               (uint8_t)HID_Handle->length,

               HID_Handle->InPipe);

  HID_Handle->state = HID_POLL;

  HID_Handle->timer = phost->Timer;

  HID_Handle->DataReady = 0U;

  break;

 case HID_POLL:

  if(USBH_LL_GetURBState(phost , HID_Handle->InPipe) == USBH_URB_DONE)

  {

   if(HID_Handle->DataReady == 0U)

   {

    USBH_HID_FifoWrite(&HID_Handle->fifo, HID_Handle->pData, HID_Handle->length);

    HID_Handle->DataReady = 1U;

    USBH_HID_EventCallback(phost);

i dont know why never enter case HID_POLL although in case HID_GET_DATA we write  HID_Handle->state = HID_POLL;

i think this is the problem.

any suggestion?!

[waclawek.jan]

I don't use Cube, sorry.

JW