sysfs-driver-hid-picolcd 1.8 KB

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  1. What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/operation_mode
  2. Date: March 2010
  3. Contact: Bruno Prémont <bonbons@linux-vserver.org>
  4. Description: Make it possible to switch the PicoLCD device between LCD
  5. (firmware) and bootloader (flasher) operation modes.
  6. Reading: returns list of available modes, the active mode being
  7. enclosed in brackets ('[' and ']')
  8. Writing: causes operation mode switch. Permitted values are
  9. the non-active mode names listed when read.
  10. Note: when switching mode the current PicoLCD HID device gets
  11. disconnected and reconnects after above delay (see attribute
  12. operation_mode_delay for its value).
  13. What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/operation_mode_delay
  14. Date: April 2010
  15. Contact: Bruno Prémont <bonbons@linux-vserver.org>
  16. Description: Delay PicoLCD waits before restarting in new mode when
  17. operation_mode has changed.
  18. Reading/Writing: It is expressed in ms and permitted range is
  19. 0..30000ms.
  20. What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/fb_update_rate
  21. Date: March 2010
  22. Contact: Bruno Prémont <bonbons@linux-vserver.org>
  23. Description: Make it possible to adjust defio refresh rate.
  24. Reading: returns list of available refresh rates (expressed in Hz),
  25. the active refresh rate being enclosed in brackets ('[' and ']')
  26. Writing: accepts new refresh rate expressed in integer Hz
  27. within permitted rates.
  28. Note: As device can barely do 2 complete refreshes a second
  29. it only makes sense to adjust this value if only one or two
  30. tiles get changed and it's not appropriate to expect the application
  31. to flush its tiny changes explicitly at higher than default rate.