Caller-owned class-layer registration record. More...

#include <ra8_usb_composite.h>

Collaboration diagram for ra8_usb_composite_class_t:

Data Fields
uint8_t	interface_number_first
	First IF this class owns.
uint8_t	interface_number_count
	IF count (CDC=2, HID=1...).
ra8_usb_composite_init_fn_t	init
	init callback (non-NULL).
ra8_usb_composite_setup_fn_t	handle_setup
	setup callback (non-NULL).
ra8_usb_composite_close_fn_t	close
	close callback (non-NULL).
void *	ctx
	Opaque context.

Detailed Description

Caller-owned class-layer registration record.

All three function pointers must be non-NULL. ctx is opaque to the composite layer and threaded back into each callback unchanged. The [interface_number_first, interface_number_first + interface_number_count) range describes which IF numbers from the configuration descriptor this class owns. CDC ACM consumes 2 IFs (control + data); HID and MSC each consume 1.

Invariant: interface_number_count >= 1.; interface_number_first + interface_number_count <= k_ra8_usb_composite_max_ifs.

static ra8_err_t my_init(void* ctx);
static ra8_err_t my_setup(void* ctx, const ra8_usb_setup_t* s);
static ra8_err_t my_close(void* ctx);
 
static const ra8_usb_composite_class_t s_cdc_layer = {
  .interface_number_first = 0U,
  .interface_number_count = 2U,
  .init                   = my_init,
  .handle_setup           = my_setup,
  .close                  = my_close,
  .ctx                    = nullptr,
};