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Diffstat (limited to 'Documentation/leds/leds-blinkm.rst')
| -rw-r--r-- | Documentation/leds/leds-blinkm.rst | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/Documentation/leds/leds-blinkm.rst b/Documentation/leds/leds-blinkm.rst index c74b5bc877b1..647be1c6c552 100644 --- a/Documentation/leds/leds-blinkm.rst +++ b/Documentation/leds/leds-blinkm.rst @@ -7,15 +7,37 @@ The leds-blinkm driver supports the devices of the BlinkM family. They are RGB-LED modules driven by a (AT)tiny microcontroller and communicate through I2C. The default address of these modules is 0x09 but this can be changed through a command. By this you could -dasy-chain up to 127 BlinkMs on an I2C bus. +daisy-chain up to 127 BlinkMs on an I2C bus. The device accepts RGB and HSB color values through separate commands. Also you can store blinking sequences as "scripts" in the controller and run them. Also fading is an option. -The interface this driver provides is 2-fold: +The interface this driver provides is 3-fold: -a) LED class interface for use with triggers +a) LED multicolor class interface for use with triggers +####################################################### + +The registration follows the scheme:: + + blinkm-<i2c-bus-nr>-<i2c-device-nr>:rgb:indicator + + $ ls -h /sys/class/leds/blinkm-1-9:rgb:indicator + brightness device max_brightness multi_index multi_intensity power subsystem trigger uevent + +Hue is controlled by the multi_intensity file and lightness is controlled by +the brightness file. + +The order in which to write the intensity values can be found in multi_index. +Exactly three values between 0 and 255 must be written to multi_intensity to +change the color:: + + $ echo 255 100 50 > multi_intensity + +The overall lightness be changed by writing a value between 0 and 255 to the +brightness file. + +b) LED class interface for use with triggers ############################################ The registration follows the scheme:: @@ -79,6 +101,7 @@ E.g.:: -as of 6/2012 +as of 07/2024 dl9pf <at> gmx <dot> de +jstrauss <at> mailbox <dot> org |