请问stm32的usb可以同时做虚拟串口和u盘

只看该作者 · 2012-10-28 11:27

请问stm32的usb可以同时做虚拟串口和u盘？u盘是使用外部spi存储器的。

只看该作者 · 2012-10-29 15:55

You can use interface association descriptor(IAD) to implement this.

只看该作者 · 2012-10-29 15:59

You can use interface association descriptor(IAD) to implement this.

1万 · 2012-10-29 16:41

stm32的usb可以同时做虚拟串口和u盘。再多模拟个鼠标，也可以

只看该作者 · 2012-10-30 08:07

4# IJK 请问有没有相关例程参考？

只看该作者 · 2012-10-30 08:48

这个可以做，好像没有同时做的例程，有单独的例程，综合下

1万 · 2012-10-30 11:06

ST的DEMO 似乎有把 U盘和鼠标合起来的例子，可以参考一下。

只看该作者 · 2012-10-30 11:12

7# IJK
好的谢谢

只看该作者 · 2012-10-30 16:22

const uint8_t MASS_DeviceDescriptor[MASS_SIZ_DEVICE_DESC] =
  {
0x12, // bLength
USB_DEVICE_DESCRIPTOR_TYPE, // bDescriptorType
0x00, // bcdUSB, version 2.00
0x02,
0xef, // bDeviceClass : each interface define the device class
0x02, // bDeviceSubClass
0x01, // bDeviceProtocol
0x40, // bMaxPacketSize0 0x40 = 64
0x83, // idVendor    (0483)
0x02,
0x40, // idProduct
0x57,
0x00, // bcdDevice 2.00
0x02,
1,             // index of string Manufacturer
//
2,             // index of string descriptor of product
//
3,             //
//
//
0x01 //bNumConfigurations
  };
const uint8_t MASS_ConfigDescriptor[MASS_SIZ_CONFIG_DESC] =
  {

0x09, // bLength: Configuation Descriptor size
USB_CONFIGURATION_DESCRIPTOR_TYPE, // bDescriptorType: Configuration
MASS_SIZ_CONFIG_DESC,

0x00,
0x03, // bNumInterfaces: 3 interface
0x01, // bConfigurationValue:
//    Configuration value
0x00, // iConfiguration:
//    Index of string descriptor
//    describing the configuration
0xC0, // bmAttributes:
//    bus powered
0x32, // MaxPower 100 mA

// IAD
0x08, //描述符大小
0x0B, //IAD描述符类型
0x00, // bFirstInterface
0x01, // bInterfaceCount
0x08, // bFunctionClass: MASS STORAGE Class
0x06, // bFunctionSubClass
0x50, // bFunctionProtocol
0x04, // iFunction

//******************* Descriptor of Mass Storage 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
0x08, // bInterfaceClass: MASS STORAGE Class
0x06, // bInterfaceSubClass : SCSI transparent
0x50, // nInterfaceProtocol
4,       // iInterface:
// 18
0x07, //Endpoint descriptor length = 7
USB_ENDPOINT_DESCRIPTOR_TYPE, //Endpoint descriptor type
0x84, //Endpoint address (IN, address 1)
0x02, //Bulk endpoint type
0x40, //Maximum packet size (64 bytes)
0x00,
0x00, //Polling interval in milliseconds
// 25
0x07, //Endpoint descriptor length = 7
USB_ENDPOINT_DESCRIPTOR_TYPE, //Endpoint descriptor type
0x05, //Endpoint address (OUT, address 2)
0x02, //Bulk endpoint type
0x40, //Maximum packet size (64 bytes)
0x00,
0x00, //Polling interval in milliseconds
//32

// IAD
0x08, //描述符大小
0x0B, //IAD描述符类型
0x01, // bFirstInterface
0x02, // bInterfaceCount
0x02, // bFunctionClass: MASS STORAGE Class
0x02, // bFunctionSubClass
0x01, // bFunctionProtocol
0x05, // iFunction

//Interface Descriptor
0x09, // bLength: Interface Descriptor size
USB_INTERFACE_DESCRIPTOR_TYPE,  // bDescriptorType: Interface
// Interface descriptor type
0x01, // 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
0x05, // 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 Managment 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
0x84, // bEndpointAddress: (IN3)
0x03, // bmAttributes: Interrupt
VIRTUAL_COM_PORT_INT_SIZE,    // wMaxPacketSize:
0x00,
0xFF, // bInterval:

//Data class interface descriptor
0x09, // bLength: Endpoint Descriptor size
USB_INTERFACE_DESCRIPTOR_TYPE,  // bDescriptorType:
0x02, // bInterfaceNumber: Number of Interface
0x00, // bAlternateSetting: Alternate setting
0x02, // bNumEndpoints: Two endpoints used
0x0A, // bInterfaceClass: CDC
0x00, // bInterfaceSubClass:
0x00, // bInterfaceProtocol:
0x05, // iInterface:
//Endpoint 3 Descriptor
0x07, // bLength: Endpoint Descriptor size
USB_ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType: Endpoint
0x81, // bEndpointAddress: (IN3)
0x02, // bmAttributes: Bulk
   64, // wMaxPacketSize:
0x00,
0x00, // bInterval: ignore for Bulk transfer
//Endpoint 1 Descriptor
0x07, // bLength: Endpoint Descriptor size
USB_ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType: Endpoint
0x03, // bEndpointAddress: (OUT5)
0x02, // bmAttributes: Bulk
   64,          // wMaxPacketSize:
0x00,
0x00 // bInterval
  };

USB复合设备配置，可以参考