最近完成了HID的基本收發，使用的配置用了2個Endpoint，把一些特別重要要的地方紀錄下來
整個Configuration 分成4大部分 :
1. Configuration
2. Interface
3. HID descriptor
4. Endpoint
以下分散開來記錄，首先紀錄Configurations
#define USB_CONFIGURATION_DESCRIPTOR_TYPE 0x02
#define USB_HID_CONFIG_DESC_SIZ 41 0x09, /* bLength: Configuration Descriptor size */
USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
USB_HID_CONFIG_DESC_SIZ, /* wTotalLength: Bytes returned */
0x00,
0x01, /*bNumInterfaces: 1 interface*/
0x01, /*bConfigurationValue: Configuration value*/
0x00, /*iConfiguration: Index of string descriptor describing the configuration*/
0x80, /*bmAttributes: bus powered and Support Remote Wake-up */
0xFA, /*MaxPower 100 mA: this current is used for detecting Vbus*/
Interface Descriptor，這邊interface class要配成 HID, 而且protocol不能配成keyboard & mouse會影響收發
0x09, /*bLength: Interface Descriptor size*/
USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/
0x00, /*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*/
0x04, /*iInterface: Index of string descriptor || origianl = 0x04*/
在來是HID descriptor
0x09, /*bLength: HID Descriptor size*/
HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
0x00, /*bcdHID: HID Class Spec release number*/
0x02,
0x00, /*bCountryCode: Hardware target country*/
0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/
0x22, /*bDescriptorType*/
CUSTOMHID_SIZ_REPORT_DESC,/*wItemLength: Total length of Report descriptor*/
0x00,
最後就是Endpoint Descriptor，這部分重複性也非常高，但是也是收發的關鍵。
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/
0x03, /*bmAttributes: Interrupt endpoint*/
HID_IN_PACKET, /*wMaxPacketSize: 4 Byte max */
0x00,
0x0a, /*bInterval: Polling Interval (10 ms)*/
/* 34 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
HID_OUT_EP, /*bEndpointAddress: Endpoint Address (OUT)*/
0x03, /*bmAttributes: Interrupt endpoint*/
HID_OUT_PACKET, /*wMaxPacketSize: 4 Byte max */
0x00,
0x0a, /*bInterval: Polling Interval (10 ms)*/
整段Configuration Descriptor
__ALIGN_BEGIN static uint8_t USBD_HID_CfgDesc[USB_HID_CONFIG_DESC_SIZ] __ALIGN_END =
{
0x09, /* bLength: Configuration Descriptor size */
USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
USB_HID_CONFIG_DESC_SIZ, /* wTotalLength: Bytes returned */
0x00,
0x01, /*bNumInterfaces: 1 interface*/
0x01, /*bConfigurationValue: Configuration value*/
0x00, /*iConfiguration: Index of string descriptor describing the configuration*/
0x80, /*bmAttributes: bus powered and Support Remote Wake-up */
0xFA, /*MaxPower 100 mA: this current is used for detecting Vbus*/ /************** Descriptor of Joystick Mouse interface ****************/
/* 09 */
0x09, /*bLength: Interface Descriptor size*/
USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/
0x00, /*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*/
0x04, /*iInterface: Index of string descriptor || origianl = 0x04*/
/******************** Descriptor of Joystick Mouse HID ********************/
/* 18 */
0x09, /*bLength: HID Descriptor size*/
HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
0x00, /*bcdHID: HID Class Spec release number*/
0x02,
0x00, /*bCountryCode: Hardware target country*/
0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/
0x22, /*bDescriptorType*/
CUSTOMHID_SIZ_REPORT_DESC,/*wItemLength: Total length of Report descriptor*/
0x00,
/******************** Descriptor of Mouse endpoint ********************/
/* 27 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/
0x03, /*bmAttributes: Interrupt endpoint*/
HID_IN_PACKET, /*wMaxPacketSize: 4 Byte max */
0x00,
0x0a, /*bInterval: Polling Interval (10 ms)*/
/* 34 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/
HID_OUT_EP, /*bEndpointAddress: Endpoint Address (OUT)*/
0x03, /*bmAttributes: Interrupt endpoint*/
HID_OUT_PACKET, /*wMaxPacketSize: 4 Byte max */
0x00,
0x0a, /*bInterval: Polling Interval (10 ms)*/
};