Linux
如何從 USB 到串列設備 CP2105 為串列設備分配符號連結？
我有CP2105的板子。它是一個 USB 埠上具有兩個 uart 介面的 USB 到串列橋接器。我已經閱讀了一些指南和 UDEV 文件，但我一直堅持為它們創建符號連結。我希望他們的名字有序列號。問題是它不起作用，即使有簡單的規則。
我的規則，應該做我想要的：
ACTION=="add", SUBSYSTEM=="tty", \ ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70", ENV{ID_MODEL}=="CP2105_Dual_USB_to_UART_Bridge_Controller", \ SYMLINK+="CP2105$env{ID_USB_INTERFACE_NUM}-$env{ID_SERIAL_SHORT}"更簡單的嘗試，應該在末尾添加兩個不同數字的符號連結：
ACTION=="add", SUBSYSTEM=="tty", ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70", SYMLINK+="CP2105%n"我也有一個規則，它有效，但做了其他事情（阻止其他驅動程序寫入此設備）：
SUBSYSTEM=="usb", ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70", ENV{ID_MM_DEVICE_IGNORE}="1"我的第一台設備的 udevadm 資訊輸出：
udevadm info -q all /dev/ttyUSB0 P: /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.0/ttyUSB0/tty/ttyUSB0 N: ttyUSB0 S: serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if00-port0 S: serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.0-port0 E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.0-port0 /dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if00-port0 E: DEVNAME=/dev/ttyUSB0 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.0/ttyUSB0/tty/ttyUSB0 E: ID_BUS=usb E: ID_MM_CANDIDATE=1 E: ID_MODEL=CP2105_Dual_USB_to_UART_Bridge_Controller E: ID_MODEL_ENC=CP2105\x20Dual\x20USB\x20to\x20UART\x20Bridge\x20Controller E: ID_MODEL_FROM_DATABASE=CP210x UART Bridge E: ID_MODEL_ID=ea70 E: ID_PATH=pci-0000:00:14.0-usb-0:5.3:1.0 E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_3_1_0 E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller E: ID_REVISION=0100 E: ID_SERIAL=Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E E: ID_SERIAL_SHORT=0087144E E: ID_TYPE=generic E: ID_USB_DRIVER=cp210x E: ID_USB_INTERFACES=:ff0000: E: ID_USB_INTERFACE_NUM=00 E: ID_VENDOR=Silicon_Labs E: ID_VENDOR_ENC=Silicon\x20Labs E: ID_VENDOR_FROM_DATABASE=Cygnal Integrated Products, Inc. E: ID_VENDOR_ID=10c4 E: MAJOR=188 E: MINOR=0 E: SUBSYSTEM=tty E: TAGS=:systemd: E: USEC_INITIALIZED=5571337818第二個：
udevadm info -q all /dev/ttyUSB1 P: /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.1/ttyUSB1/tty/ttyUSB1 N: ttyUSB1 S: serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if01-port0 S: serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.1-port0 E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.1-port0 /dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if01-port0 E: DEVNAME=/dev/ttyUSB1 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.1/ttyUSB1/tty/ttyUSB1 E: ID_BUS=usb E: ID_MM_CANDIDATE=1 E: ID_MODEL=CP2105_Dual_USB_to_UART_Bridge_Controller E: ID_MODEL_ENC=CP2105\x20Dual\x20USB\x20to\x20UART\x20Bridge\x20Controller E: ID_MODEL_FROM_DATABASE=CP210x UART Bridge E: ID_MODEL_ID=ea70 E: ID_PATH=pci-0000:00:14.0-usb-0:5.3:1.1 E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_3_1_1 E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller E: ID_REVISION=0100 E: ID_SERIAL=Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E E: ID_SERIAL_SHORT=0087144E E: ID_TYPE=generic E: ID_USB_DRIVER=cp210x E: ID_USB_INTERFACES=:ff0000: E: ID_USB_INTERFACE_NUM=01 E: ID_VENDOR=Silicon_Labs E: ID_VENDOR_ENC=Silicon\x20Labs E: ID_VENDOR_FROM_DATABASE=Cygnal Integrated Products, Inc. E: ID_VENDOR_ID=10c4 E: MAJOR=188 E: MINOR=1 E: SUBSYSTEM=tty E: TAGS=:systemd: E: USEC_INITIALIZED=5570324399有人可以幫忙嗎？
事實證明，我必須改變兩件事。首先，我必須用我的規則從文件名中獲取數字（我將它從 52 更改為 70）。其次，我注意到這
ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70"不起作用，因為沒有可用於檢查子系統 tty 的屬性。我將其更改為適當的環境變數，並以這條規則結束：SUBSYSTEM=="tty", \ ENV{ID_MODEL}=="CP2105_Dual_USB_to_UART_Bridge_Controller", \ ENV{ID_VENDOR_ID}=="10c4", ENV{ID_MODEL_ID}=="ea70", \ SYMLINK+="ttyCP2105-$env{ID_USB_INTERFACE_NUM}-$env{ID_SERIAL_SHORT}"