USB Generic HID

[gaminn]

Hello,

I adapted USB hid mouse example project from Freescale USB Stack v4.0.2 to Generic HID. My PC program to test HID device succesfully sends first report, but MCU (TWR-K70) never receives it. Then I'm unable to send next reports to MCU. Like the first report blocks the endpoint. I registered callbacks when initializing HID class:

USB_Class_HID_Init(CONTROLLER_ID, USB_App_Callback, VendorCallback, USB_App_Param_Callback);

On first report sent from PC to MCU, USB_App_Callback() is called with event_type = USB_APP_SEND_COMPLETE (why send complete ???). Then nothing. Sending reports from MCU to PC works.

I configured HID generic device to use 2 endpoints IN and OUT, report size is 64 bytes.

Thanks for any advice.

[csjc]

Martin,

Is the Generic HID yellow-banged in Device Manger (Windows)?

Thanks,

Chris.

[CarlosCasillas]

Hello Martin,

I have attached a generic HID project for CodeWarrior v10.2. It is a SCI to HID bridge application, using the MC9S08JS16 MCU. It is based on Mouse example Freescale USB Stack v3.2.0, but generating a stand-alone project that doesn’t require installing any USB Stack version or placing the project on a specific location. Besides, it adds the implementation of the optional OUT endpoint, which is not included on any of the HID examples of USB Stack.

On this project, the SCI module is configured by default to 8N1, 115200 bps. These configurations are declared on file “sci.h” and on the call of function “u8SCI_init”. Then, on interrupt function “SCI_rx_srvc”, the SCI data is received and stored on the circular buffer “g_sci_rx_buf”, and the proper flags are set. Finally, on “Serial2HID_Task” function (on “Serial2HID.c” file), the SCI’s buffer is sent by HID’s IN endpoint, and the data received from HID´s OUT endpoint is sent by the SCI module.

The time interval between transaction is configured to 1mS, and this time base is generated by the TPM module, which is configured inside function “TestApp_Init” of “Serial2HID.c” file. On TPM´s interrupt function “TPM_OVF_ISR”, the circular buffer (used for transactions) is managed.

I hope you could use it as reference.

Best regards!

/Carlos

[gaminn · Accepted solution]

Thanks, during weeked I managed to make generic HID device. The main problem was, that the usb_hid class provided in Freescale USB stack supports only IN transactions. In other words, it is not a general implementation of HID class. I added support of OUT transactions (USB_Class_HID_Recv_Data() function calling _usb_device_recv_data()) and second endpoint (OUT). It seems to be working well, I'm testing the generic HID now.

[xavi2804]

hello, did you make it works? i'm trying to do this also.

[allanrobinson]

Javier,

Yes, I was able to get it working. When I get a second from my job, I will send you my code. You have to make changes to the usb_descriptor.c, usb_descriptor.h, USB_Config.h, usb_hid.c, and then some changes to the actual callback function in the particular application code (in our case we called it IntersilDAQ.c).

We are using an MKL25Z128xxx4 microcontroller so we used the USBHIDKBD-Flash demo for our template code. I followed Carlos generic HID project code for the SCI to HID bridge application to write my code and the reading chapter 5 in the Freescale USB Device Stack Users Guide. His code is up on the Freescale community. His microcontroller was different than the one we are using.

Allan

[xavi2804]

Thank you Allan, i'm going to check the code and try to get it work for my MK60F.

Javier

[allanrobinson]

Javier,

Were you able to get your HID communication working?  Do you still need me to try and send you my code pertaining to HID communication?

Allan

[xavi2804]

well, still i haven't got time to make it work, i just see a little the code from CarlosCasillas, and i tryed to modified form my microcrontroler but got any lucky, no i cant get the computer to reconize the usb device, but if you could sen me your code to check it and compare it would be very helpul.

Thank you

[allanrobinson]

Javier,

Attached is my code.

Allan

[PedroBecerra]

Hi Allan.

I'm trying to make working your code.

I've started from the HID_MOUSE_DEVICE_MKL25Z128_PEx and applied all of your code, but it doesn't work.

I've modified the descriptors and I've got to comunicate from my board to PC. But I cannot comunicate from PC to board.

Could you give me any help?  Please.

[joseali]

Hello, could you explain me, in what part of code the MCU is receiving data?

what is the function for doing that?

regards

Jose