How can I make a fully custom USB device descriptor, or at least modify more than the macros allow?

[JustEnoughDucks]

Good evening. 

I am working on a USB HID joystick. The USB documentation on nordic, while better than the woefully inadequate zephyr mainline docs, only covers the surface cases.

I want the bDeviceClass of 0 and a custom bcdDevice.

I can't seem to figure out how to do this without completely deconstructing the macro magic and breaking things. For example, I tried turning 

USBD_DEVICE_DEFINE(test_usbd, DEVICE_DT_GET(DT_NODELABEL(zephyr_udc0)), CONFIG_VID, CONFIG_PID);

into 

const struct usb_device_descriptor fs_desc_joy_usbd = {

.bLength = sizeof(struct usb_device_descriptor),

.bDescriptorType = USB_DESCRIPTOR_DEVICE,

.bcdUSB = sys_cpu_to_le16(0x0200),

.bDeviceClass = 0,

.bDeviceSubClass = 0,

.bDeviceProtocol = 0,

.bMaxPacketSize0 = 64,

.idVendor = 0x0483,

.idProduct = 0x5710,

.bcdDevice = sys_cpu_to_le16(0x0100),

.iManufacturer = 0,

.iProduct = 0,

.iSerialNumber = 2,

.bNumConfigurations = 1,

};

static STRUCT_SECTION_ITERABLE(usbd_context, joy_usbd) = {

.name = STRINGIFY(joy_usbd),

.dev = DEVICE_DT_GET(DT_NODELABEL(zephyr_udc0)),

.fs_desc = &fs_desc_joy_usbd,

};

which has only led to a hard fault in the os with nothing else changed

Is there a safe method to modify the device descriptor outside of the given few modifiable values?

[Kenneth]

Hello,

Try to take a look at the existing samples if they can help;
https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/samples/index.html#usb 

Kenneth

[JustEnoughDucks]

Hello,

I had gone through them before when I was learning how to use USBnext. With your reply, I thought I missed something.

Indeed I missed usbd_device_set_code_triple and usbd_device_set_bcd_device 

I also found out that the kernel will hard fault when you fill out a VID or PID that already has a manufacturer/product string field and then us 

USBD_DESC_MANUFACTURER_DEFINE(usb_mfr, "tst");

USBD_DESC_PRODUCT_DEFINE(usb_product, "one");

and their associated runtime assignment functions.