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wiki2:linux_drivers
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| Ambos lados, revisión anterior Revisión previa Próxima revisión | Revisión previa | ||
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wiki2:linux_drivers [2020/05/09 08:25] 127.0.0.1 editor externo |
wiki2:linux_drivers [2020/09/11 20:57] (actual) |
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| Tutorial for creating a driver for a virtual char device. It creates that device using ''mknod'' command and accesses it using the driver. \\ | Tutorial for creating a driver for a virtual char device. It creates that device using ''mknod'' command and accesses it using the driver. \\ | ||
| - | https://s3.wasabisys.com/public-files/tutorial-DD.pdf | + | https://s3.wasabisys.com/my-files/public/tutorial-DD.pdf |
| + | ---- | ||
| + | |||
| + | ===== How to... Graphic tablet ===== | ||
| + | To see all registered inputs: | ||
| + | <code> | ||
| + | xinput | ||
| + | </code> | ||
| + | To map a xinput with a display (''xrandr'' will give you the display id): | ||
| + | <code> | ||
| + | xinput map-to-output <registered input id> <display id> | ||
| + | xinput map-to-output 22 HDMI-1-1 | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== List USB devices ==== | ||
| + | |||
| + | To detect your USB device, in a terminal, you can try: | ||
| + | <code> | ||
| + | lsusb , example: | ||
| + | $ lsusb | ||
| + | Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub | ||
| + | Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub | ||
| + | Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub | ||
| + | Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub | ||
| + | Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub | ||
| + | Bus 001 Device 002: ID 046d:0809 Logitech, Inc. Webcam Pro 9000 | ||
| + | Bus 003 Device 002: ID 046d:c016 Logitech, Inc. Optical Wheel Mouse | ||
| + | </code> | ||
| + | or this powerful tool, lsinput , 1st install it, and then try it, it lists all input devices including your USB device : | ||
| + | <code> | ||
| + | $ sudo apt-get install input-utils | ||
| + | $ lsinput | ||
| + | /dev/input/event0 | ||
| + | ... | ||
| + | |||
| + | /dev/input/event1 | ||
| + | ... | ||
| + | |||
| + | /dev/input/event2 | ||
| + | ... | ||
| + | |||
| + | /dev/input/event3 | ||
| + | bustype : BUS_USB | ||
| + | vendor : 0x46d | ||
| + | product : 0xc016 | ||
| + | version : 272 | ||
| + | name : "Logitech Optical USB Mouse" | ||
| + | phys : "usb-0000:00:1d.1-2/input0" | ||
| + | uniq : "" | ||
| + | bits ev : EV_SYN EV_KEY EV_REL EV_MSC | ||
| + | </code> | ||
| + | udevadm , with this command line, you need to unplug the device before using the command and then plug it to see it: | ||
| + | <code> | ||
| + | $ udevadm monitor --udev | ||
| + | monitor will print the received events for: | ||
| + | UDEV - the event which udev sends out after rule processing | ||
| + | UDEV [1915.787445] add /devices/pci0000:00/0000:00:1d.3/usb5/5-2 (usb) | ||
| + | UDEV [1915.796226] add /devices/pci0000:00/0000:00:1d.3/usb5/5-2/5-2:1.0 (usb) | ||
| + | </code> | ||
wiki2/linux_drivers.1589012709.txt.gz · Última modificación: 2020/05/09 09:25 (editor externo)
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