1-0:1.0 3-0:1.0 3-10:1.0 3-11 3-11:1.1 3-4 3-4.2 3-4.4 3-4.4:1.1 3-4.4:1.3 3-4.4:1.5 3-4.4:1.7 3-4.4:1.9 3-8:1.0 3-9:1.0 4-0:1.0 usb2 usb4
2-0:1.0 3-10 3-10:1.1 3-11:1.0 3-11:1.2 3-4:1.0 3-4.2:1.0 3-4.4:1.0 3-4.4:1.2 3-4.4:1.4 3-4.4:1.6 3-4.4:1.8 3-8 3-9 3-9:1.1 usb1 usb3
解析:
<bus>-<port[.port[.port]]>:<config>.<interface>
1. 【USB笔记】接口描述符Interface Descriptor
2. Understand USB (in Linux)
3. superuser.com/
dmesg
[13363.344895] cdc_acm 3-4.4:1.0: ttyACM0: USB ACM device
[13363.345308] cdc_acm 3-4.4:1.2: ttyACM1: USB ACM device
[13363.346187] cdc_acm 3-4.4:1.4: ttyACM2: USB ACM device
[13363.346989] cdc_acm 3-4.4:1.6: ttyACM3: USB ACM device
Windows:
裝罝管理員裡, com port(右鍵，內容）
詳細資料，屬性，硬體識別碼
USB\VID_1E2D&PID_0069&REV_0000&MI_02
Linux:
$ cat /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4.4/3-4.4:1.6/bInterfaceNumber
$ ls /sys/devices/pci0000:00/0000:00:14.0/usb3/3-4/3-4.4/3-4.4:1.6/tty
好用tool: lsusb.py
lsusb.py
$ ./lsusb.py -i
WARNING: Failure to read usb.ids
usb1 1d6b:0002 09 1IF [USB 2.00, 480 Mbps, 0mA] (xhci-hcd 0000:00:0d.0) hub
usb2 1d6b:0003 09 1IF [USB 3.10, 10000 Mbps, 0mA] (xhci-hcd 0000:00:0d.0) hub
usb3 1d6b:0002 09 1IF [USB 2.00, 480 Mbps, 0mA] (xhci-hcd 0000:00:14.0) hub
3-4 1a40:0101 09 1IF [USB 2.00, 480 Mbps, 100mA] () hub
3-4.2 047d:2048 00 1IF [USB 2.00, 1.5 Mbps, 100mA] (Primax Kensington Eagle Trackball)
3-4.2:1.0 (IF) 03:01:02 1EP () usbhid hidraw0 (hid-generic) input15 (hid-generic)
3-4.4 1e2d:0069 ef 10IFs [USB 2.00, 480 Mbps, 500mA] (Cinterion Wireless Modules PLSx3 f7b292b4)
3-4.4:1.0 (IF) 02:02:01 1EP () cdc_acm tty/ttyACM0
3-4.4:1.1 (IF) 0a:00:00 2EPs () cdc_acm
3-4.4:1.2 (IF) 02:02:01 1EP () cdc_acm tty/ttyACM1
3-4.4:1.3 (IF) 0a:00:00 2EPs () cdc_acm
3-4.4:1.4 (IF) 02:02:01 1EP () cdc_acm tty/ttyACM2
3-4.4:1.5 (IF) 0a:00:00 2EPs () cdc_acm
3-4.4:1.6 (IF) 02:02:01 1EP () cdc_acm tty/ttyACM3
3-4.4:1.7 (IF) 0a:00:00 2EPs () cdc_acm
3-4.4:1.8 (IF) 02:06:00 1EP () cdc_ether net/wwx00a0c6292b40
3-4.4:1.9 (IF) 0a:00:00 2EPs () cdc_ether
3-8 04f3:0c11 00 1IF [USB 2.00, 12 Mbps, 100mA] (ELAN ELAN:Fingerprint)
3-8:1.0 (IF) ff:00:00 5EPs ()
3-9 13d3:56a2 ef 2IFs [USB 2.00, 480 Mbps, 500mA] (Azurewave USB2.0 HD UVC WebCam 0x0001)
3-9:1.0 (IF) 0e:01:00 1EP () uvcvideo video4linux/video1 video4linux/video0 input/input19
3-9:1.1 (IF) 0e:02:00 0EPs () uvcvideo
3-10 8087:0029 e0 2IFs [USB 2.01, 12 Mbps, 100mA] ()
3-10:1.0 (IF) e0:01:01 3EPs () btusb bluetooth/hci0
3-10:1.1 (IF) e0:01:01 2EPs () btusb
3-11 1044:7a3c 00 3IFs [USB 2.00, 12 Mbps, 500mA] (GIGABYTE Fusion RGB KB)
3-11:1.0 (IF) 03:01:01 1EP () usbhid hidraw1 (hid-generic) input16 (hid-generic)
3-11:1.1 (IF) 03:01:01 1EP () usbhid hidraw2 (hid-generic) input32 (hid-generic)
3-11:1.2 (IF) 03:01:00 1EP () usbhid hidraw3 (hid-generic) input34 input39 input35 input33 input36 (hid-generic)
usb4 1d6b:0003 09 1IF [USB 3.10, 20000 Mbps, 0mA] (xhci-hcd 0000:00:14.0) hub
#!/bin/bash
# Function to check if the VID and PID match
function check_vid_pid {
local vid_pid_dir="$1"
local vid="$2"
local pid="$3"
local device_vid=$(cat "$vid_pid_dir/idVendor" 2>/dev/null)
local device_pid=$(cat "$vid_pid_dir/idProduct" 2>/dev/null)
if [[ "$device_vid" == "$vid" && "$device_pid" == "$pid" ]]; then
echo "$vid_pid_dir"
return 0 # Indicate a match was found
else
return 1 # Indicate no match was found
fi
}
# Search for USB devices with matching VID and PID
function search_usb_devices {
local vid="$1"
local pid="$2"
local -a paths=()
for device in /sys/bus/usb/devices/*; do
if [[ -d "$device" ]]; then
if check_vid_pid "$device" "$vid" "$pid"; then
paths+=("$device")
fi
fi
done
}
function find_ttyUSB_ACM {
local path="$1"
local bInterface="04"
local tty_devices=()
cd $path
# Find directories that contain bInterfaceNumber files, limiting depth to 2
find ./ -maxdepth 2 -type f -name "bInterfaceNumber" -print0 | while IFS= read -r -d $'\0' bInterface_file; do
# Extract the directory containing the bInterfaceNumber file
interface_dir=$(dirname "$bInterface_file")
# Read the bInterfaceNumber
interface_number=$(cat "$bInterface_file")
# Check if the interface number matches the desired value
if [[ "$interface_number" == "$bInterface" ]]; then
#echo "Found matching bInterface in: $interface_dir"
# Search for ttyUSB* device nodes within the interface directory
find "$interface_dir" -maxdepth 1 -type d -name "ttyUSB*" -print0 | while IFS= read -r -d $'\0' ttyname; do
echo "/dev/$(basename "$ttyname")"
#tty_devices+=("/dev/$(basename "$ttyname")")
done
fi
done
#echo "${tty_devices[*]}"
}
# Usage: ./find_usb_device.sh VID PID
if [[ $# -ne 2 ]]; then
echo "Usage: $0 VID PID"
exit 1
fi
if systemctl is-enabled ModemManager.service; then
echo "ModemManager is enabled."
systemctl stop ModemManager.service
sleep 3
systemctl disable ModemManager.service
sleep 3
echo "ModemManager has been stopped and disabled."
else
echo "ModemManager is not enabled."
fi
paths=$(search_usb_devices "$1" "$2")
# Iterate over the paths and find ttyUSB/ACM devices
for path in $paths; do
echo "Searching for ttyUSB/ACM devices in: $path"
# Capture the tty devices returned by find_ttyUSB_ACM
tty_devices=$(find_ttyUSB_ACM "$path")
#echo "bbb-$tty_devices"
done
output:
./find_usb_device.sh 1e2d 0069
/sys/bus/usb/devices/3-2/, 480Mbits, 500mA, USB 2.00
/sys/bus/usb/devices/3-2/3-2:1.6/tty/ttyACM3
/sys/bus/usb/devices/3-2/3-2:1.4/tty/ttyACM2
/sys/bus/usb/devices/3-2/3-2:1.2/tty/ttyACM1
/sys/bus/usb/devices/3-2/3-2:1.0/tty/ttyACM0
ludev library
#include <libudev.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[]) {
if (argc != 4) {
fprintf(stderr, "Usage: %s <VID> <PID> <bInterfaceNumber>\n", argv[0]);
return 1;
}
const char *target_vid = argv[1];
const char *target_pid = argv[2];
const char *target_bInterfaceNumber = argv[3];
struct udev *udev = udev_new();
if (!udev) {
fprintf(stderr, "Failed to create udev object\n");
return 1;
}
struct udev_enumerate *enumerate = udev_enumerate_new(udev);
udev_enumerate_add_match_subsystem(enumerate, "tty");
udev_enumerate_add_match_property(enumerate, "ID_VENDOR_ID", target_vid);
udev_enumerate_add_match_property(enumerate, "ID_MODEL_ID", target_pid);
udev_enumerate_scan_devices(enumerate);
struct udev_list_entry *devices = udev_enumerate_get_list_entry(enumerate);
struct udev_list_entry *entry;
udev_list_entry_foreach(entry, devices) {
const char *path = udev_list_entry_get_name(entry);
struct udev_device *dev = udev_device_new_from_syspath(udev, path);
const char *devnode = udev_device_get_devnode(dev);
const char *bInterface =
udev_device_get_property_value(dev, "ID_USB_INTERFACE_NUM");
// printf("devnode=%s, bInterface=%s\n", devnode, bInterface);
if (devnode && bInterface &&
strcmp(bInterface, target_bInterfaceNumber) == 0) {
printf("Found device: %s\n", devnode);
}
udev_device_unref(dev);
}
udev_enumerate_unref(enumerate);
udev_unref(udev);
return 0;
}
$ gcc find_usb_device.c -o find_usb_device -ludev
./find_usb_device 1bc7 1060 04
Found device: /dev/ttyUSB2
Found device: /dev/ttyUSB7
Found device: /dev/ttyUSB12
./find_usb_device 1e2d 0069 04
Found device: /dev/ttyACM2
udevadm
$ udevadm info --query=all --name=/dev/ttyUSB2
P: /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.2/ttyUSB2/tty/ttyUSB2
N: ttyUSB2
L: 0
S: serial/by-id/usb-Telit_LE910C1-WWX_6db09e-if02-port0
S: serial/by-path/pci-0000:00:14.0-usb-0:2:1.2-port0
E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.2/ttyUSB2/tty/ttyUSB2
E: DEVNAME=/dev/ttyUSB2
E: MAJOR=188
E: MINOR=2
E: SUBSYSTEM=tty
E: ID_VENDOR_ID=1bc7
E: ID_MODEL_ID=1031
...
...
E: ID_USB_INTERFACE_NUM=02
E: ID_USB_DRIVER=option
E: ID_PATH=pci-0000:00:14.0-usb-0:2:1.2
E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_2_1_2
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