标签：des http io ar os sp for on 数据
USB转双串口，核心技术就在于组合设备（USB Composite）的实现，组合设备的实现，其核心技术在于描述符的实现，下面我们先给出描述符：
设备描述符
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__ALIGN_BEGIN uint8_t USBD_DeviceDesc[USB_SIZ_DEVICE_DESC] __ALIGN_END = { 0x12, /*bLength */ USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/ 0x00, /*bcdUSB */ 0x02,#ifdef DUAL_COM 0xEF, /*bDeviceClass*/ 0x02, /*bDeviceSubClass*/ 0x01, /*bDeviceProtocol*/#else 0x00, /*bDeviceClass*/ 0x00, /*bDeviceSubClass*/ 0x00, /*bDeviceProtocol*/ #endif USB_OTG_MAX_EP0_SIZE, /*bMaxPacketSize*/ LOBYTE(USBD_VID), /*idVendor*/ HIBYTE(USBD_VID), /*idVendor*/ LOBYTE(USBD_PID), /*idVendor*/ HIBYTE(USBD_PID), /*idVendor*/ 0x00, /*bcdDevice rel. 2.00*/ 0x02, 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*/ } ; /* USB_DeviceDescriptor */ |
注意：双串口需要全局定义DUAL_COM宏
配置描述符是重中之重
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__ALIGN_BEGIN uint8_t usbd_cdc_CfgDesc[USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END ={ /*Configuration Descriptor*/ 0x09, /* bLength: Configuration Descriptor size */ USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */ USB_CDC_CONFIG_DESC_SIZ, /* wTotalLength:no of returned bytes */ 0x00,#ifdef DUAL_COM 0x04, /* bNumInterfaces: 4 interface */#else 0x02, /* bNumInterfaces: 2 interface */#endif 0x01, /* bConfigurationValue: Configuration value */ 0x00, /* iConfiguration: Index of string descriptor describing the configuration */ 0x60, /* bmAttributes: self powered */ 0xFA, /* MaxPower 0 mA */ /*---------------------------------------------------------------------------*/#ifdef DUAL_COM // IAD 0x08, // bLength: Interface Descriptor size 0x0B, // bDescriptorType: IAD 0x00, // bFirstInterface 0x02, // bInterfaceCount 0x02, // bFunctionClass: CDC 0x02, // bFunctionSubClass 0x01, // bFunctionProtocol 0x02, // iFunction#endif /*Interface Descriptor */ 0x09, /* bLength: Interface Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: Interface */ /* Interface descriptor type */ 0x00, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x01, /* bNumEndpoints: One endpoints used */ 0x02, /* bInterfaceClass: Communication Interface Class */ 0x02, /* bInterfaceSubClass: Abstract Control Model */ 0x01, /* bInterfaceProtocol: Common AT commands */ 0x00, /* iInterface: */ /*Header Functional Descriptor*/ 0x05, /* bLength: Endpoint Descriptor size */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x00, /* bDescriptorSubtype: Header Func Desc */ 0x10, /* bcdCDC: spec release number */ 0x01, /*Call Management Functional Descriptor*/ 0x05, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x01, /* bDescriptorSubtype: Call Management Func Desc */ 0x00, /* bmCapabilities: D0+D1 */ 0x01, /* bDataInterface: 1 */ /*ACM Functional Descriptor*/ 0x04, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x02, /* bDescriptorSubtype: Abstract Control Management desc */ 0x02, /* bmCapabilities */ /*Union Functional Descriptor*/ 0x05, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x06, /* bDescriptorSubtype: Union func desc */ 0x00, /* bMasterInterface: Communication class interface */ 0x01, /* bSlaveInterface0: Data Class Interface */ /*Endpoint 2 Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_CMD_EP, /* bEndpointAddress */ 0x03, /* bmAttributes: Interrupt */ LOBYTE(CDC_CMD_PACKET_SZE), /* wMaxPacketSize: */ HIBYTE(CDC_CMD_PACKET_SZE), 0xFF, /* bInterval: */ /*---------------------------------------------------------------------------*/ /*Data class interface descriptor*/ 0x09, /* bLength: Endpoint Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x01, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x02, /* bNumEndpoints: Two endpoints used */ 0x0A, /* bInterfaceClass: CDC */ 0x00, /* bInterfaceSubClass: */ 0x00, /* bInterfaceProtocol: */ 0x00, /* iInterface: */ /*Endpoint OUT Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_OUT_EP, /* bEndpointAddress */ 0x02, /* bmAttributes: Bulk */ LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */ HIBYTE(CDC_DATA_MAX_PACKET_SIZE), 0x00, /* bInterval: ignore for Bulk transfer */ /*Endpoint IN Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_IN_EP, /* bEndpointAddress */ 0x02, /* bmAttributes: Bulk */ LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */ HIBYTE(CDC_DATA_MAX_PACKET_SIZE), 0x00, /* bInterval: ignore for Bulk transfer */ #ifdef DUAL_COM // IAD 0x08, // bLength: Interface Descriptor size 0x0B, // bDescriptorType: IAD 0x02, // bFirstInterface 0x02, // bInterfaceCount 0x02, // bFunctionClass: CDC 0x02, // bFunctionSubClass 0x01, // bFunctionProtocol 0x02, // iFunction /*Interface Descriptor */ 0x09, /* bLength: Interface Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: Interface */ /* Interface descriptor type */ 0x02, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x01, /* bNumEndpoints: One endpoints used */ 0x02, /* bInterfaceClass: Communication Interface Class */ 0x02, /* bInterfaceSubClass: Abstract Control Model */ 0x01, /* bInterfaceProtocol: Common AT commands */ 0x00, /* iInterface: */ /*Header Functional Descriptor*/ 0x05, /* bLength: Endpoint Descriptor size */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x00, /* bDescriptorSubtype: Header Func Desc */ 0x10, /* bcdCDC: spec release number */ 0x01, /*Call Management Functional Descriptor*/ 0x05, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x01, /* bDescriptorSubtype: Call Management Func Desc */ 0x00, /* bmCapabilities: D0+D1 */ 0x01, /* bDataInterface: 1 */ /*ACM Functional Descriptor*/ 0x04, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x02, /* bDescriptorSubtype: Abstract Control Management desc */ 0x02, /* bmCapabilities */ /*Union Functional Descriptor*/ 0x05, /* bFunctionLength */ 0x24, /* bDescriptorType: CS_INTERFACE */ 0x06, /* bDescriptorSubtype: Union func desc */ 0x00, /* bMasterInterface: Communication class interface */ 0x01, /* bSlaveInterface0: Data Class Interface */ /*Endpoint 2 Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_CMD_EP, /* bEndpointAddress */ 0x03, /* bmAttributes: Interrupt */ LOBYTE(CDC_CMD_PACKET_SZE), /* wMaxPacketSize: */ HIBYTE(CDC_CMD_PACKET_SZE), 0xFF, /* bInterval: */ /*---------------------------------------------------------------------------*/ /*Data class interface descriptor*/ 0x09, /* bLength: Endpoint Descriptor size */ USB_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType: */ 0x03, /* bInterfaceNumber: Number of Interface */ 0x00, /* bAlternateSetting: Alternate setting */ 0x02, /* bNumEndpoints: Two endpoints used */ 0x0A, /* bInterfaceClass: CDC */ 0x00, /* bInterfaceSubClass: */ 0x00, /* bInterfaceProtocol: */ 0x00, /* iInterface: */ /*Endpoint OUT Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_OUT_EP_EX, /* bEndpointAddress */ 0x02, /* bmAttributes: Bulk */ LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */ HIBYTE(CDC_DATA_MAX_PACKET_SIZE), 0x00, /* bInterval: ignore for Bulk transfer */ /*Endpoint IN Descriptor*/ 0x07, /* bLength: Endpoint Descriptor size */ USB_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType: Endpoint */ CDC_IN_EP_EX, /* bEndpointAddress */ 0x02, /* bmAttributes: Bulk */ LOBYTE(CDC_DATA_MAX_PACKET_SIZE), /* wMaxPacketSize: */ HIBYTE(CDC_DATA_MAX_PACKET_SIZE), 0x00 /* bInterval: ignore for Bulk transfer */#endif} ; |
这两个搞定，其他就是USB处理的细节问题了，包括端点的初始化，端点地址分配，数据发送接收的处理等，具体处理和实现程序可参考附件的工程源码。
成功安装驱动
<ignore_js_op>
设备管理器里面的信息
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单片机程序源码： <ignore_js_op>
Ginkgo_USB_COM.rar
PC端的驱动安装引导程序： <ignore_js_op> two_com.rar
转载
标签：des http io ar os sp for on 数据
原文地址：http://www.cnblogs.com/Ph-one/p/4143491.html
