[问答]

求教整过USB多功能接口设备的帮忙看看啊

问答对人有帮助，内容完整，我也想知道答案 0 这是整合的一个多功能接口设备的描述符，实现CDC+Mass Storage两个设备功能，描述符如下： unsigned char device_framework_high_speed[] = { /* Device descriptor / 0x12, 0x01, 0x00, 0x02, 0xEF, 0x02, 0x01, 0x40, 0x84, 0x84, 0x00, 0x01, 0x00, 0x01, 0x01, 0x02, 0x03, 0x01, //bNumConfigurations:configuration 1 / Device qualifier descriptor / 0x0a, 0x06, 0x00, 0x02, 0x02, 0x00, 0x00, 0x40, 0x01, 0x00, / Configuration 1 descriptor / 0x09, 0x02, 0x59, 0x00, //wTotallength=97 0x03, //bNumInterfaces 0x01, //bConfigurationValue:Enable configuration 1 0x00, 0x80, 0x32, / Interface association descriptor of CDC. / 0x08, 0x0b, 0x00, //bFirstInterface 0x02, //bInterfaceCount 0x02, //bFunctionClass:2--CDC 0x02, 0x00, 0x00, /*******************************The Descriptor of CDC **********************************/ / Communication Class Interface Descriptor Requirement / 0x09, 0x04, 0x00, //bInterfaceNumber 0x00, 0x01, //bNumEndpoints:one Endpoint(0x84) 0x02, //bInterfaceClass:2--CDC 0x02, 0x01, 0x00, / Header Functional Descriptor / 0x05, 0x24, 0x00, 0x10, 0x01, //bcdCDC / ACM Functional Descriptor / 0x04, 0x24, 0x02, 0x0f, / Union Functional Descriptor / 0x05, 0x24, 0x06, 0x00, //bMasterInterface 0x01, //bSlaveInterface0:Data Class Interface / Call Management Functional Descriptor / 0x05, 0x24, 0x01, 0x03, 0x01, / Endpoint 1 descriptor / 0x07, 0x05, 0x81, //bEndpointAddress:IN, EndpointID=1 0x03, //bmAttributes:Interrupt 0x08, 0x00, //wMaxPacketSize 0x0b, //bInterval / Data Class Interface Descriptor Requirement / 0x09, 0x04, 0x01, //bInterfaceNumber 0x00, 0x02, //bNumEndpoints:two endpoints for IN_endpoints and OUT_endpoints 0x0A, //bInterfaceClass:0A--CDC 0x00, 0x00, 0x00, / First alternate setting Endpoint 2 descriptor / 0x07, 0x05, 0x02, //bEndpointAddress:OUT, EndpointID=2 0x02, //bmAttributes:Bulk 0x00, 0x02, //wMaxPacketSize:0200h=512--high_speed 0x00, / Endpoint 3 descriptor / 0x07, 0x05, 0x83, //bEndpointAddress:IN, EndpointID=3 0x02, //bmAttributes:Bulk 0x00, 0x02, //wMaxPacketSize:0200h=512--high_speed 0x00, /**********************************************************************************************************/ #if 0 / Interface association descriptor of Mass Storage. / 0x08, 0x0b, 0x01, //bFirstInterface 0x01, //bInterfaceCount 0x08, //bFunctionClass:08--MASS STORAGE Class 0x06, 0x00, 0x00, #endif /****************************The descriptor of Mass Storage *********************************/ / Mass Storage Class Interface Descriptor Requirement / 0x09, 0x04, 0x02, //bInterfaceNumber 0x00, //bAlternateSetting 0x02, //bNumEndpoints:two endpoints for IN and OUT 0x08, //bInterfaceClass:08--MASS STORAGE Class 0x06, //bInterfaceSubClass:SCSI transparent 0x50, 0x00, / Mass Storage Class Endpoint 4 Descriptor Requirement / 0x07, 0x05, 0x84, //bEndpointAddress:IN, EndpointID=4 0x02, //bmAttributes:Bulk 0x00, 0x02, //wMaxPacketSize:0200h=512--high_speed 0x00, / Mass Storage Class Endpoint 5 Descriptor Requirement / 0x07, 0x05, 0x05, //bEndpointAddress:OUT, EndpointID=5 0x02, //bmAttributes:Bulk 0x00, 0x02, //wMaxPacketSize:0200h=512--high_speed 0x00, /******************************************************************************************/ }; 将该描述符在目标平台运行并接入Linux主机，用“dmesg”查看打印信息如下： [ 1925.208169] u* 2-4: new high-speed USB device number 5 using ehci-pci [ 1925.341185] u* 2-4: config 1 has an invalid descriptor of length 7, skipping remainder of the config [ 1925.341203] u* 2-4: config 1 interface 2 altsetting 0 has 0 endpoint descriptors, different from the interface descriptor's value: 2 [ 1925.342182] u* 2-4: New USB device found, idVendor=8484, idProduct=0100 [ 1925.342190] u* 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1925.342197] u* 2-4: Product: EL Composite device [ 1925.342203] u* 2-4: Manufacturer: Expres Logic [ 1925.342209] u* 2-4: SerialNumber: 0001 [ 1925.380015] cdc_acm 2-4:1.0: ttyACM0: USB ACM device [ 1925.380545] ucore: registered new interface driver cdc_acm [ 1925.380548] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters [ 1925.392882] u-storage 2-4:1.2: USB Mass Storage device detected [ 1925.394796] u-storage: probe of 2-4:1.2 failed with error -5 [ 1925.394834] ucore: registered new interface driver u-storage [ 1925.437745] u**core: registered new interface driver uas 第二条和第三条报错怎么改也都有......还有Mass Storage能被检测到，但失败了，根据“probe of 2-4:1.2 failed with error -5”报错信息也没查到，是因为缺少处理Mass Storage接口的命令吗？因为这个是自己添加的，CDC是原先USB协议栈里自带定义好的....... 大伙帮忙看看，拜谢了！ 0 已退回3积分
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