/* * File : hid.c * COPYRIGHT (C) 2008 - 2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2017-03-13 Urey the first version * 2017-11-16 ZYH Update to common hid */ #include #include #include #include #include "drivers/usb_common.h" #include "drivers/usb_device.h" #include "hid.h" #ifdef RT_USB_DEVICE_HID struct hid_s { struct rt_device parent; struct ufunction *func; uep_t ep_in; uep_t ep_out; int status; rt_uint16_t protocol; rt_uint8_t report_buf[MAX_REPORT_SIZE]; struct rt_messagequeue hid_mq; }; /* CustomHID_ConfigDescriptor */ ALIGN(4) const rt_uint8_t _report_desc[]= { #ifdef RT_USB_DEVICE_HID_KEYBOARD USAGE_PAGE(1), 0x01, USAGE(1), 0x06, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_KEYBOARD1, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0xE0, USAGE_MAXIMUM(1), 0xE7, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, REPORT_SIZE(1), 0x01, REPORT_COUNT(1), 0x08, INPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x08, INPUT(1), 0x01, REPORT_COUNT(1), 0x05, REPORT_SIZE(1), 0x01, USAGE_PAGE(1), 0x08, USAGE_MINIMUM(1), 0x01, USAGE_MAXIMUM(1), 0x05, OUTPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x03, OUTPUT(1), 0x01, REPORT_COUNT(1), 0x06, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x65, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0x00, USAGE_MAXIMUM(1), 0x65, INPUT(1), 0x00, END_COLLECTION(0), #if RT_USB_DEVICE_HID_KEYBOARD_NUMBER>1 /****keyboard2*****/ USAGE_PAGE(1), 0x01, USAGE(1), 0x06, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_KEYBOARD2, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0xE0, USAGE_MAXIMUM(1), 0xE7, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, REPORT_SIZE(1), 0x01, REPORT_COUNT(1), 0x08, INPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x08, INPUT(1), 0x01, REPORT_COUNT(1), 0x06, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x65, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0x00, USAGE_MAXIMUM(1), 0x65, INPUT(1), 0x00, END_COLLECTION(0), #if RT_USB_DEVICE_HID_KEYBOARD_NUMBER>2 USAGE_PAGE(1), 0x01, USAGE(1), 0x06, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_KEYBOARD3, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0xE0, USAGE_MAXIMUM(1), 0xE7, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, REPORT_SIZE(1), 0x01, REPORT_COUNT(1), 0x08, INPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x08, INPUT(1), 0x01, REPORT_COUNT(1), 0x06, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x65, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0x00, USAGE_MAXIMUM(1), 0x65, INPUT(1), 0x00, END_COLLECTION(0), #if RT_USB_DEVICE_HID_KEYBOARD_NUMBER>3 USAGE_PAGE(1), 0x01, USAGE(1), 0x06, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_KEYBOARD4, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0xE0, USAGE_MAXIMUM(1), 0xE7, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, REPORT_SIZE(1), 0x01, REPORT_COUNT(1), 0x08, INPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x08, INPUT(1), 0x01, REPORT_COUNT(1), 0x06, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x65, USAGE_PAGE(1), 0x07, USAGE_MINIMUM(1), 0x00, USAGE_MAXIMUM(1), 0x65, INPUT(1), 0x00, END_COLLECTION(0), #endif #endif #endif #endif // Media Control #ifdef RT_USB_DEVICE_HID_MEDIA USAGE_PAGE(1), 0x0C, USAGE(1), 0x01, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_MEDIA, USAGE_PAGE(1), 0x0C, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, REPORT_SIZE(1), 0x01, REPORT_COUNT(1), 0x07, USAGE(1), 0xB5, // Next Track USAGE(1), 0xB6, // Previous Track USAGE(1), 0xB7, // Stop USAGE(1), 0xCD, // Play / Pause USAGE(1), 0xE2, // Mute USAGE(1), 0xE9, // Volume Up USAGE(1), 0xEA, // Volume Down INPUT(1), 0x02, // Input (Data, Variable, Absolute) REPORT_COUNT(1), 0x01, INPUT(1), 0x01, END_COLLECTION(0), #endif #ifdef RT_USB_DEVICE_HID_GENERAL USAGE_PAGE(1), 0x8c, USAGE(1), 0x01, COLLECTION(1), 0x01, REPORT_ID(1), HID_REPORT_ID_GENERAL, REPORT_COUNT(1), RT_USB_DEVICE_HID_GENERAL_IN_REPORT_LENGTH, USAGE(1), 0x03, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0xFF, INPUT(1), 0x02, REPORT_COUNT(1), RT_USB_DEVICE_HID_GENERAL_OUT_REPORT_LENGTH, USAGE(1), 0x04, REPORT_SIZE(1), 0x08, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0xFF, OUTPUT(1), 0x02, END_COLLECTION(0), #endif #ifdef RT_USB_DEVICE_HID_MOUSE USAGE_PAGE(1), 0x01, // Generic Desktop USAGE(1), 0x02, // Mouse COLLECTION(1), 0x01, // Application USAGE(1), 0x01, // Pointer COLLECTION(1), 0x00, // Physical REPORT_ID(1), HID_REPORT_ID_MOUSE, REPORT_COUNT(1), 0x03, REPORT_SIZE(1), 0x01, USAGE_PAGE(1), 0x09, // Buttons USAGE_MINIMUM(1), 0x1, USAGE_MAXIMUM(1), 0x3, LOGICAL_MINIMUM(1), 0x00, LOGICAL_MAXIMUM(1), 0x01, INPUT(1), 0x02, REPORT_COUNT(1), 0x01, REPORT_SIZE(1), 0x05, INPUT(1), 0x01, REPORT_COUNT(1), 0x03, REPORT_SIZE(1), 0x08, USAGE_PAGE(1), 0x01, USAGE(1), 0x30, // X USAGE(1), 0x31, // Y USAGE(1), 0x38, // scroll LOGICAL_MINIMUM(1), 0x81, LOGICAL_MAXIMUM(1), 0x7f, INPUT(1), 0x06, END_COLLECTION(0), END_COLLECTION(0), #endif }; /* CustomHID_ReportDescriptor */ ALIGN(4) static struct udevice_descriptor _dev_desc = { USB_DESC_LENGTH_DEVICE, //bLength; USB_DESC_TYPE_DEVICE, //type; USB_BCD_VERSION, //bcdUSB; USB_CLASS_HID, //bDeviceClass; 0x00, //bDeviceSubClass; 0x00, //bDeviceProtocol; 64, //bMaxPacketSize0; _VENDOR_ID, //idVendor; _PRODUCT_ID, //idProduct; USB_BCD_DEVICE, //bcdDevice; USB_STRING_MANU_INDEX, //iManufacturer; USB_STRING_PRODUCT_INDEX, //iProduct; USB_STRING_SERIAL_INDEX, //iSerialNumber; USB_DYNAMIC, //bNumConfigurations; }; //FS and HS needed ALIGN(4) static struct usb_qualifier_descriptor dev_qualifier = { sizeof(dev_qualifier), //bLength USB_DESC_TYPE_DEVICEQUALIFIER, //bDescriptorType 0x0200, //bcdUSB USB_CLASS_MASS_STORAGE, //bDeviceClass 0x06, //bDeviceSubClass 0x50, //bDeviceProtocol 64, //bMaxPacketSize0 0x01, //bNumConfigurations 0, }; /* hid interface descriptor */ ALIGN(4) const static struct uhid_comm_descriptor _hid_comm_desc = { #ifdef RT_USB_DEVICE_COMPOSITE /* Interface Association Descriptor */ { USB_DESC_LENGTH_IAD, USB_DESC_TYPE_IAD, USB_DYNAMIC, 0x01, 0x03, /* bInterfaceClass: HID */ #if defined(RT_USB_DEVICE_HID_KEYBOARD)||defined(RT_USB_DEVICE_HID_MOUSE) USB_HID_SUBCLASS_BOOT, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ #else USB_HID_SUBCLASS_NOBOOT, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ #endif #if !defined(RT_USB_DEVICE_HID_KEYBOARD)||!defined(RT_USB_DEVICE_HID_MOUSE)||!defined(RT_USB_DEVICE_HID_MEDIA) USB_HID_PROTOCOL_NONE, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #elif !defined(RT_USB_DEVICE_HID_MOUSE) USB_HID_PROTOCOL_KEYBOARD, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #else USB_HID_PROTOCOL_MOUSE, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #endif 0x00, }, #endif /* Interface Descriptor */ { USB_DESC_LENGTH_INTERFACE, USB_DESC_TYPE_INTERFACE, USB_DYNAMIC, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x02, /* bNumEndpoints */ 0x03, /* bInterfaceClass: HID */ #if defined(RT_USB_DEVICE_HID_KEYBOARD)||defined(RT_USB_DEVICE_HID_MOUSE) USB_HID_SUBCLASS_BOOT, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ #else USB_HID_SUBCLASS_NOBOOT, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ #endif #if !defined(RT_USB_DEVICE_HID_KEYBOARD)||!defined(RT_USB_DEVICE_HID_MOUSE)||!defined(RT_USB_DEVICE_HID_MEDIA) USB_HID_PROTOCOL_NONE, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #elif !defined(RT_USB_DEVICE_HID_MOUSE) USB_HID_PROTOCOL_KEYBOARD, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #else USB_HID_PROTOCOL_MOUSE, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ #endif 0, /* iInterface: Index of string descriptor */ }, /* HID Descriptor */ { HID_DESCRIPTOR_SIZE, /* bLength: HID Descriptor size */ HID_DESCRIPTOR_TYPE, /* bDescriptorType: HID */ 0x0110, /* bcdHID: HID Class Spec release number */ 0x00, /* bCountryCode: Hardware target country */ 0x01, /* bNumDescriptors: Number of HID class descriptors to follow */ { { 0x22, /* bDescriptorType */ sizeof(_report_desc), /* wItemLength: Total length of Report descriptor */ }, }, }, /* Endpoint Descriptor IN */ { USB_DESC_LENGTH_ENDPOINT, USB_DESC_TYPE_ENDPOINT, USB_DYNAMIC | USB_DIR_IN, USB_EP_ATTR_INT, 0x40, 0x01, }, /* Endpoint Descriptor OUT */ { USB_DESC_LENGTH_ENDPOINT, USB_DESC_TYPE_ENDPOINT, USB_DYNAMIC | USB_DIR_OUT, USB_EP_ATTR_INT, 0x40, 0x01, }, }; ALIGN(4) const static char* _ustring[] = { "Language", "RT-Thread Team.", "RTT HID-Device", "32021919830108", "Configuration", "Interface", }; static void dump_data(rt_uint8_t *data, rt_size_t size) { rt_size_t i; for (i = 0; i < size; i++) { rt_kprintf("%02x ", *data++); if ((i + 1) % 8 == 0) { rt_kprintf("\n"); }else if ((i + 1) % 4 == 0){ rt_kprintf(" "); } } } static void dump_report(struct hid_report * report) { rt_kprintf("\nHID Recived:"); rt_kprintf("\nReport ID %02x \n", report->report_id); dump_data(report->report,report->size); } static rt_err_t _ep_out_handler(ufunction_t func, rt_size_t size) { struct hid_s *data; struct hid_report report; RT_ASSERT(func != RT_NULL); RT_ASSERT(func->device != RT_NULL); data = (struct hid_s *) func->user_data; if(size != 0) { rt_memcpy((void *)&report,(void*)data->ep_out->buffer,size); report.size = size-1; rt_mq_send(&data->hid_mq,(void *)&report,sizeof(report)); } data->ep_out->request.buffer = data->ep_out->buffer; data->ep_out->request.size = EP_MAXPACKET(data->ep_out); data->ep_out->request.req_type = UIO_REQUEST_READ_BEST; rt_usbd_io_request(func->device, data->ep_out, &data->ep_out->request); return RT_EOK; } static rt_err_t _ep_in_handler(ufunction_t func, rt_size_t size) { struct hid_s *data; RT_ASSERT(func != RT_NULL); RT_ASSERT(func->device != RT_NULL); data = (struct hid_s *) func->user_data; if(data->parent.tx_complete != RT_NULL) { data->parent.tx_complete(&data->parent,RT_NULL); } return RT_EOK; } static rt_err_t _hid_set_report_callback(udevice_t device, rt_size_t size) { RT_DEBUG_LOG(RT_DEBUG_USB, ("_hid_set_report_callback\n")); if(size != 0) { } dcd_ep0_send_status(device->dcd); return RT_EOK; } /** * This function will handle hid interface bRequest. * * @param device the usb device object. * @param setup the setup bRequest. * * @return RT_EOK on successful. */ static rt_err_t _interface_handler(ufunction_t func, ureq_t setup) { RT_ASSERT(func != RT_NULL); RT_ASSERT(func->device != RT_NULL); RT_ASSERT(setup != RT_NULL); struct hid_s *data = (struct hid_s *) func->user_data; if(setup->wIndex != 0) return -RT_EIO; switch (setup->bRequest) { case USB_REQ_GET_DESCRIPTOR: if((setup->wValue >> 8) == USB_DESC_TYPE_REPORT) { rt_usbd_ep0_write(func->device, (void *)(&_report_desc[0]), sizeof(_report_desc)); } else if((setup->wValue >> 8) == USB_DESC_TYPE_HID) { rt_usbd_ep0_write(func->device, (void *)(&_hid_comm_desc.hid_desc), sizeof(struct uhid_descriptor)); } break; case USB_HID_REQ_GET_REPORT: if(setup->wLength == 0) { rt_usbd_ep0_set_stall(func->device); break; } if((setup->wLength == 0) || (setup->wLength > MAX_REPORT_SIZE)) setup->wLength = MAX_REPORT_SIZE; rt_usbd_ep0_write(func->device, data->report_buf,setup->wLength); break; case USB_HID_REQ_GET_IDLE: dcd_ep0_send_status(func->device->dcd); break; case USB_HID_REQ_GET_PROTOCOL: rt_usbd_ep0_write(func->device, &data->protocol,2); break; case USB_HID_REQ_SET_REPORT: if((setup->wLength == 0) || (setup->wLength > MAX_REPORT_SIZE)) rt_usbd_ep0_set_stall(func->device); rt_usbd_ep0_read(func->device, data->report_buf, setup->wLength, _hid_set_report_callback); break; case USB_HID_REQ_SET_IDLE: dcd_ep0_send_status(func->device->dcd); break; case USB_HID_REQ_SET_PROTOCOL: data->protocol = setup->wValue; dcd_ep0_send_status(func->device->dcd); break; } return RT_EOK; } /** * This function will run cdc function, it will be called on handle set configuration bRequest. * * @param func the usb function object. * * @return RT_EOK on successful. */ static rt_err_t _function_enable(ufunction_t func) { struct hid_s *data; RT_ASSERT(func != RT_NULL); RT_ASSERT(func->device != RT_NULL); data = (struct hid_s *) func->user_data; RT_DEBUG_LOG(RT_DEBUG_USB, ("hid function enable\n")); // // _vcom_reset_state(func); // if(data->ep_out->buffer == RT_NULL) { data->ep_out->buffer = rt_malloc(HID_RX_BUFSIZE); } data->ep_out->request.buffer = data->ep_out->buffer; data->ep_out->request.size = EP_MAXPACKET(data->ep_out); data->ep_out->request.req_type = UIO_REQUEST_READ_BEST; rt_usbd_io_request(func->device, data->ep_out, &data->ep_out->request); return RT_EOK; } /** * This function will stop cdc function, it will be called on handle set configuration bRequest. * * @param func the usb function object. * * @return RT_EOK on successful. */ static rt_err_t _function_disable(ufunction_t func) { struct hid_s *data; RT_ASSERT(func != RT_NULL); RT_ASSERT(func->device != RT_NULL); data = (struct hid_s *) func->user_data; RT_DEBUG_LOG(RT_DEBUG_USB, ("hid function disable\n")); if(data->ep_out->buffer != RT_NULL) { rt_free(data->ep_out->buffer); data->ep_out->buffer = RT_NULL; } return RT_EOK; } static struct ufunction_ops ops = { _function_enable, _function_disable, RT_NULL, }; /** * This function will configure hid descriptor. * * @param comm the communication interface number. * @param data the data interface number. * * @return RT_EOK on successful. */ static rt_err_t _hid_descriptor_config(uhid_comm_desc_t hid, rt_uint8_t cintf_nr) { #ifdef RT_USB_DEVICE_COMPOSITE hid->iad_desc.bFirstInterface = cintf_nr; #endif return RT_EOK; } static rt_size_t _hid_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size) { struct hid_s *hiddev = (struct hid_s *)dev; struct hid_report report; if (hiddev->func->device->state == USB_STATE_CONFIGURED) { report.report_id = pos; rt_memcpy((void *)report.report,(void *)buffer,size); report.size = size; hiddev->ep_in->request.buffer = (void *)&report; hiddev->ep_in->request.size = (size+1) > 64 ? 64 : size+1; hiddev->ep_in->request.req_type = UIO_REQUEST_WRITE; rt_usbd_io_request(hiddev->func->device, hiddev->ep_in, &hiddev->ep_in->request); return size; } return 0; } RT_WEAK void HID_Report_Received(hid_report_t report) { dump_report(report); } ALIGN(RT_ALIGN_SIZE) static rt_uint8_t hid_thread_stack[512]; static struct rt_thread hid_thread; static void hid_thread_entry(void* parameter) { struct hid_report report; struct hid_s *hiddev; hiddev = (struct hid_s *)parameter; while(1) { if(rt_mq_recv(&hiddev->hid_mq, &report, sizeof(report),RT_WAITING_FOREVER) != RT_EOK ) continue; HID_Report_Received(&report); } } #ifdef RT_USING_DEVICE_OPS const static struct rt_device_ops hid_device_ops = { RT_NULL, RT_NULL, RT_NULL, RT_NULL, _hid_write, RT_NULL, }; #endif static rt_uint8_t hid_mq_pool[(sizeof(struct hid_report)+sizeof(void*))*8]; static void rt_usb_hid_init(struct ufunction *func) { struct hid_s *hiddev; hiddev = (struct hid_s *)func->user_data; rt_memset(&hiddev->parent, 0, sizeof(hiddev->parent)); #ifdef RT_USING_DEVICE_OPS hiddev->parent.ops = &hid_device_ops; #else hiddev->parent.write = _hid_write; #endif hiddev->func = func; rt_device_register(&hiddev->parent, "hidd", RT_DEVICE_FLAG_RDWR); rt_mq_init(&hiddev->hid_mq, "hiddmq", hid_mq_pool, sizeof(struct hid_report), sizeof(hid_mq_pool), RT_IPC_FLAG_FIFO); rt_thread_init(&hid_thread, "hidd", hid_thread_entry, hiddev, hid_thread_stack, sizeof(hid_thread_stack), RT_USBD_THREAD_PRIO, 20); rt_thread_startup(&hid_thread); } /** * This function will create a hid function instance. * * @param device the usb device object. * * @return RT_EOK on successful. */ ufunction_t rt_usbd_function_hid_create(udevice_t device) { ufunction_t func; struct hid_s *data; uintf_t hid_intf; ualtsetting_t hid_setting; uhid_comm_desc_t hid_desc; /* parameter check */ RT_ASSERT(device != RT_NULL); /* set usb device string description */ rt_usbd_device_set_string(device, _ustring); /* create a cdc function */ func = rt_usbd_function_new(device, &_dev_desc, &ops); //not support hs //rt_usbd_device_set_qualifier(device, &_dev_qualifier); /* allocate memory for cdc vcom data */ data = (struct hid_s*)rt_malloc(sizeof(struct hid_s)); rt_memset(data, 0, sizeof(struct hid_s)); func->user_data = (void*)data; /* create an interface object */ hid_intf = rt_usbd_interface_new(device, _interface_handler); /* create an alternate setting object */ hid_setting = rt_usbd_altsetting_new(sizeof(struct uhid_comm_descriptor)); /* config desc in alternate setting */ rt_usbd_altsetting_config_descriptor(hid_setting, &_hid_comm_desc, (rt_off_t)&((uhid_comm_desc_t)0)->intf_desc); /* configure the hid interface descriptor */ _hid_descriptor_config(hid_setting->desc, hid_intf->intf_num); /* create endpoint */ hid_desc = (uhid_comm_desc_t)hid_setting->desc; data->ep_out = rt_usbd_endpoint_new(&hid_desc->ep_out_desc, _ep_out_handler); data->ep_in = rt_usbd_endpoint_new(&hid_desc->ep_in_desc, _ep_in_handler); /* add the int out and int in endpoint to the alternate setting */ rt_usbd_altsetting_add_endpoint(hid_setting, data->ep_out); rt_usbd_altsetting_add_endpoint(hid_setting, data->ep_in); /* add the alternate setting to the interface, then set default setting */ rt_usbd_interface_add_altsetting(hid_intf, hid_setting); rt_usbd_set_altsetting(hid_intf, 0); /* add the interface to the mass storage function */ rt_usbd_function_add_interface(func, hid_intf); /* initilize hid */ rt_usb_hid_init(func); return func; } struct udclass hid_class = { .rt_usbd_function_create = rt_usbd_function_hid_create }; int rt_usbd_hid_class_register(void) { rt_usbd_class_register(&hid_class); return 0; } INIT_PREV_EXPORT(rt_usbd_hid_class_register); #endif /* RT_USB_DEVICE_HID */