一、概论：
在STM32_USB-FS-Device_Lib_V4.1.0的Custom_HID工程基础上进行修改；
开发一款设备，有三个HID接口，mouse+pen+自定义HID
其中：0_HID 是mouse（端点1 IN）；1_HID 是pen（端点2 IN）；2_HID 是自定义（端点3 IN-OUT）。
在设备管理器和bus hound可以看到如下：
二、修改步骤：
1、修改设备$$配置描述符
/* USB Standard Device Descriptor */ const uint8_t CustomHID_DeviceDescriptor[CUSTOMHID_SIZ_DEVICE_DESC] = { 0x12, /*bLength */ USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/ 0x10, /*bcdUSB */ 0x01, 0x00, /*bDeviceClass*/ 0x00, /*bDeviceSubClass*/ 0x00, /*bDeviceProtocol*/ 0x40, /*bMaxPacketSize:64 bytes*/ LOBYTE(USBD_VID), /*idVendor*/ HIBYTE(USBD_VID), /*idVendor*/ LOBYTE(USBD_PID), /*idVendor*/ HIBYTE(USBD_PID), /*idVendor*/ 0x00, /*bcdDevice rel. 00.00*/ 0x00, USBD_IDX_MFC_STR, /*Index of manufacturer string*/ USBD_IDX_PRODUCT_STR, /*Index of product string*/ USBD_IDX_SERIAL_STR, /*Index of serial number string*/ USBD_CFG_MAX_NUM /*bNumConfigurations*/ }; /* CustomHID_DeviceDescriptor */ /* USB Configuration Descriptor */ /* All Descriptors (Configuration, Interface, Endpoint, Class, Vendor */ const uint8_t CustomHID_ConfigDescriptor[CUSTOMHID_SIZ_CONFIG_DESC] = { /************** Configuration Descriptor Bus Powered, 100 mA ****************/ 0x09, /* bLength: Configuration Descriptor size */ USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */ 0x5b, /* wTotalLength: Bytes returned */ 0x00, 0x03, /* bNumInterfaces: 1 interface *///3个HID接口 0x01, /* bConfigurationValue: Configuration value */ 0x00, /* iConfiguration: Index of string descriptor describing the configuration*/ 0xA0, /* bmAttributes: Self powered:C0 Bus Powered, Remote Wakeup:A0 */ 0x32, /* MaxPower 100 mA: this current is used for detecting Vbus */ // 0/0 HID 1 Endpoint IN of 端点1 /************** Descriptor of 0/0 HID interface ****************/ /* 09 */ 0x09, /* bLength: Interface Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE,/* bDescriptorType: Interface descriptor type */ 0x00, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x01, /* bNumEndpoints */ 0x03, /* bInterfaceClass: HID */ 0x01, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ 0x02, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ 0x00, /* iInterface: Index of string descriptor */ /******************** Descriptor of 0/0 HID ********************/ /* 18 */ 0x09, /* bLength: HID Descriptor size */ HID_DESCRIPTOR_TYPE, /* bDescriptorType: HID */ 0x00, /*bcdHID: HID Class Spec release number*/ 0x01, 0x00, /* bCountryCode: Hardware target country */ 0x01, /* bNumDescriptors: Number of HID class descriptors to follow */ 0x22, /* bDescriptorType */ sizeof(mouse_ReportDescriptor)&0xFF, /* wItemLength: Total length of Report descriptor :177 bytes*/ (sizeof(mouse_ReportDescriptor)>>8)&0xFF, /******************** Descriptor of 0/0 HID endpoints :1IN ******************/ /* 27 */ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x81, /* bEndpointAddress: Endpoint Address (IN) */ 0x03, /* bmAttributes: Interrupt endpoint */ 0x08, /* wMaxPacketSize: 8 Bytes max */ 0x00, 0x04, /* bInterval: Polling Interval (4 ms) */ // 1/0 HID 1 Endpoint IN of 端点2 /************** Descriptor of 1/0 HID interface ****************/ /* 34 */ 0x09, /* bLength: Interface Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE,/* bDescriptorType: Interface descriptor type */ 0x01, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x01, /* bNumEndpoints */ 0x03, /* bInterfaceClass: HID */ 0x01, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ 0x02, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ 0x00, /* iInterface: Index of string descriptor */ /******************** Descriptor of 1/0 HID ********************/ /* 43 */ 0x09, /* bLength: HID Descriptor size */ HID_DESCRIPTOR_TYPE, /* bDescriptorType: HID */ 0x00, /*bcdHID: HID Class Spec release number*/ 0x01, 0x00, /* bCountryCode: Hardware target country */ 0x01, /* bNumDescriptors: Number of HID class descriptors to follow */ 0x22, /* bDescriptorType */ sizeof(pen_ReportDescriptor)&0xFF, /* wItemLength: Total length of Report descriptor :237 bytes*/ (sizeof(pen_ReportDescriptor)>>8)&0xFF, /******************** Descriptor of 1/0 HID endpoints :2 IN ******************/ /* 52 */ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x82, /* bEndpointAddress: Endpoint Address (IN) */ 0x03, /* bmAttributes: Interrupt endpoint */ 0x40, /* wMaxPacketSize: 64 Bytes max */ 0x00, 0x03, /* bInterval: Polling Interval (3 ms) */ // 2/0 HID 1 Endpoint IN /1 Endpoint OUT of 端点3 /************** Descriptor of 2/0 HID interface ****************/ /* 59 */ 0x09, /* bLength: Interface Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE,/* bDescriptorType: Interface descriptor type */ 0x02, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x02, /* bNumEndpoints */ 0x03, /* bInterfaceClass: HID */ 0x00, /* bInterfaceSubClass : 1=BOOT, 0=no boot */ 0x00, /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */ 0x00, /* iInterface: Index of string descriptor */ /******************** Descriptor of 2/0 HID ********************/ /* 68 */ 0x09, /* bLength: HID Descriptor size */ HID_DESCRIPTOR_TYPE, /* bDescriptorType: HID */ 0x00, /*bcdHID: HID Class Spec release number*/ 0x01, 0x00, /* bCountryCode: Hardware target country */ 0x01, /* bNumDescriptors: Number of HID class descriptors to follow */ 0x22, /* bDescriptorType */ sizeof(HID_driver_ReportDescriptor)&0xFF, /* wItemLength: Total length of Report descriptor :36 bytes*/ (sizeof(HID_driver_ReportDescriptor)>>8)&0xFF, /******************** Descriptor of 2/0 HID endpoints :3 In, Interrupt, 3 ms******************/ /* 77 */ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x83, /* bEndpointAddress: Endpoint Address (IN) */ 0x03, /* bmAttributes: Interrupt endpoint */ 0x0A, /* wMaxPacketSize: 10 Bytes max */ 0x00, 0x03, /* bInterval: Polling Interval (3 ms) */ /******************** Descriptor of 2/0 HID endpoints :3 Out, Interrupt, 3 ms******************/ /* 84 */ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x03, /* bEndpointAddress: Endpoint Address (out) */ 0x03, /* bmAttributes: Interrupt endpoint */ 0x0A, /* wMaxPacketSize: 10 Bytes max */ 0x00, 0x0A, /* bInterval: Polling Interval (10 ms) */ }; /* CustomHID_ConfigDescriptor */