struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep) { struct USBEndpoint *eps = pid == USB_TOKEN_IN ? dev->ep_in : dev->ep_out; if (ep == 0) { return &dev->ep_ctl; } assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT); assert(ep > 0 && ep <= USB_MAX_ENDPOINTS); return eps + ep - 1; }