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将USB变成终端

tag-icon • tag-icon usb c serial-port minicom
将USB变成终端

我有一个通过 USB 连接的硬件设备，无需创建特定的 /dev/something。它确实改变了 /dev/ptmx 和 /dev/char 上的时间，但仅此而已。我所知道的是设备的 VID:PID，并且文档说 USB（应该）充当 921600 8N1 处的串行设备。如果我能够连接，我应该能够向它发送简单的文本命令 (SCSI)，就像在串行接口上​​一样。

我很确定我可以使用 libusd 或 libhid 来连接它，但从头开始编写通信代码非常耗时。难道没有一些linux技巧来创建/dev/ttySomething，这样我就可以与minicom或简单的C程序进行通信吗？

$ dmesg
usb 1-2: new full-speed USB device number 7 using xhci_hcd
usb 1-2: New USB device found, idVendor=104d, idProduct=3001
usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-2: Product: ESP301 Motion Control 
usb 1-2: Manufacturer: NEWPORT Corp.    
usb 1-2: SerialNumber: 0000000000000000

$ lsusb -v
Bus 001 Device 007: ID 104d:3001 Newport Corporation 
Device Descriptor:
bLength                18
bDescriptorType         1
bcdUSB               1.10
bDeviceClass          255 Vendor Specific Class
bDeviceSubClass         0 
bDeviceProtocol         0 
bMaxPacketSize0         8
idVendor           0x104d Newport Corporation
idProduct          0x3001 
bcdDevice            1.01
iManufacturer           1 NEWPORT Corp.    
iProduct                2 ESP301 Motion Control 
iSerial                 3 0000000000000000
bNumConfigurations      1
Configuration Descriptor:
 bLength                 9
 bDescriptorType         2
 wTotalLength           39
 bNumInterfaces          1
 bConfigurationValue     2
 iConfiguration          0 
 bmAttributes         0xa0
 (Bus Powered)
 Remote Wakeup
 MaxPower              100mA
 Interface Descriptor:
 bLength                 9
 bDescriptorType         4
 bInterfaceNumber        0
 bAlternateSetting       0
 bNumEndpoints           3
 bInterfaceClass       255 Vendor Specific Class
 bInterfaceSubClass      0 
 bInterfaceProtocol      0 
 iInterface              0 
 Endpoint Descriptor:
  bLength                 7
  bDescriptorType         5
  bEndpointAddress     0x81  EP 1 IN
  bmAttributes            2
  Transfer Type            Bulk
  Synch Type               None
  Usage Type               Data
  wMaxPacketSize     0x0040  1x 64 bytes
  bInterval               0
 Endpoint Descriptor:
  bLength                 7
  bDescriptorType         5
  bEndpointAddress     0x01  EP 1 OUT
  bmAttributes            2
  Transfer Type            Bulk
  Synch Type               None
  Usage Type               Data
  wMaxPacketSize     0x0040  1x 64 bytes
  bInterval               0
 Endpoint Descriptor:
  bLength                 7
  bDescriptorType         5
  bEndpointAddress     0x83  EP 3 IN
  bmAttributes            3
  Transfer Type            Interrupt
  Synch Type               None
  Usage Type               Data
  wMaxPacketSize     0x0002  1x 2 bytes
  bInterval               1
Device Status:     0x0001
Self Powered

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