SMSC USB2512Bi D1739-A2B10 7390AKA ATC-CN | USB HUB 1 fel 2 le | 0424 Standard Microsystems Corp. | 2512 USB 2.0 Hub |
SIL 2105 F02C2 1812+ | USB - 2 UART híd | 10c4 Cygnal Integrated Products, Inc. | ea70 CP210x UART Bridge |
Texas PCM2903B 6CM009MG4 | USB - hang kodek | 08bb Texas Instruments | 29b3 PCM2903B Audio CODEC |
ADM 3202A #746 | RS232 szintillesztő | ||
2737 J08 JRC | műveleti erősítő |
$ cat /usr/share/misc/usb.ids
0424 Standard Microsystems Corp.
2512 USB 2.0 Hub
10c4 Cygnal Integrated Products, Inc.
ea70 CP210x UART Bridge
08bb Texas Instruments
29b3 PCM2903B Audio CODEC
$ dmesg -t
usb 1-4: New USB device found, idVendor=0424, idProduct=2512
usb 1-4.1: cp210x converter now attached to ttyUSB0
usb 1-4.1: cp210x converter now attached to ttyUSB1
usb 1-4.1: New USB device found, idVendor=10c4, idProduct=ea70
usb 1-4.1: Product: CP2105 Dual USB to UART Bridge Controller
usb 1-4.1: Manufacturer: Silicon Labs
usb 1-4.2: New USB device found, idVendor=08bb, idProduct=29b3
usb 1-4.2: Product: USB Audio CODEC
usb 1-4.2: Manufacturer: Burr-Brown from TI
$ ls -l /dev/ttyU*
crw-rw---- 1 root dialout 188, 0 ápr 8 17:07 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 ápr 8 17:07 /dev/ttyUSB1
$ lsusb -v
Device Descriptor:
  idVendor 0x0424 Standard Microsystems Corp.
  idProduct 0x2512 USB 2.0 Hub
MaxPower 2mA
Device Descriptor:
idVendor 0x10c4 Cygnal Integrated Products, Inc.
idProduct 0xea70 CP210x UART Bridge
MaxPower 100mA
Device Descriptor:
idVendor 0x08bb Texas Instruments
idProduct 0x29b3 PCM2903B Audio CODEC
MaxPower 20mA
$ udevadm info -a /dev/ttyUSB0
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4.1/1-4.1:1.0':
ATTRS{interface}=="Enhanced Com Port"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4.1':
ATTRS{bMaxPower}=="100mA"
ATTRS{idVendor}=="10c4"
ATTRS{product}=="CP2105 Dual USB to UART Bridge Controller"
$ udevadm info -a /dev/ttyUSB1
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4.1/1-4.1:1.1':
ATTRS{interface}=="Standard Com Port"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4.1':
ATTRS{bMaxPower}=="100mA"
ATTRS{idProduct}=="ea70"
ATTRS{idVendor}=="10c4"
ATTRS{product}=="CP2105 Dual USB to UART Bridge Controller"
/dev/ttyUSB0
t = 69.969214 μs, f = 7.146000 kHz
/dev/ttyUSB1
t = 70.447341 μs, f = 7.097500 kHz
/dev/ttyUSB0
t = 71.859730 μs, f = 6.958000 kHz
/dev/ttyUSB1
t = 71.306332 μs, f = 7.012000 kHz
/dev/ttyUSB0
t = 70.249385 μs, f = 7.117500 kHz
/dev/ttyUSB1
t = 69.468565 μs, f = 7.197500 kHz
Experiment is the sole judge of scientific “truth”.
A (természet)tudományos igazság kizárólagos kritériuma a kísérlet.
Feynman Richard