Generic HID with HCS08JM

[ETCTim]

I am trying to use the USB with Generic HID to move some data from my development board to my PC.

I successfully have the Freescale demo board running and delivering 1 byte of data based on the 2 switches on the eval board.

My problem is that I cannot figure out how to increase the 1 byte to multiple bytes. I tried changing a few of the values, such as the 1 in the following code:

out_report=hid_add_report(rpt_out, 0, 1);

in_report=hid_add_report(rpt_in, 0, 1);

As well as the constant EP0_PACKET_SIZE (which is 8 by default.)

Any changes I have tried have caused the board to run off into the weeds when I try to USB send.

I would appreciate if someone can help me out.

Which values should I modify?

Do I need to modify my descriptor?

Ultimately, I would like to send a payload of 64 bytes.

Thanks in advanced.

Tim

[Goz]

Hi Tim,

You are almost there. I am assuming you are having problems sending back data larger than just a few bytes. If so, you will also have to change your endpoint descriptor in the hid_usb_config.c file.  Modify USB_FILL_EP_DEC to something like the following USB_FILL_EP_DESC(0x1, 1, 3, 64, 4). Where 64 indicates that you want to be able to send 64 bytes max back to the host.

Along with what you have changed already, this should just work.

Goz

[TurboBob]

don't forget MaxReportLength in HID.c  this sets the array sizes when setting up reports.