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84 lines
2.0 KiB
84 lines
2.0 KiB
================== |
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Leds BlinkM driver |
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================== |
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The leds-blinkm driver supports the devices of the BlinkM family. |
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They are RGB-LED modules driven by a (AT)tiny microcontroller and |
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communicate through I2C. The default address of these modules is |
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0x09 but this can be changed through a command. By this you could |
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dasy-chain up to 127 BlinkMs on an I2C bus. |
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The device accepts RGB and HSB color values through separate commands. |
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Also you can store blinking sequences as "scripts" in |
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the controller and run them. Also fading is an option. |
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The interface this driver provides is 2-fold: |
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a) LED class interface for use with triggers |
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############################################ |
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The registration follows the scheme:: |
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blinkm-<i2c-bus-nr>-<i2c-device-nr>-<color> |
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$ ls -h /sys/class/leds/blinkm-6-* |
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/sys/class/leds/blinkm-6-9-blue: |
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brightness device max_brightness power subsystem trigger uevent |
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/sys/class/leds/blinkm-6-9-green: |
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brightness device max_brightness power subsystem trigger uevent |
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/sys/class/leds/blinkm-6-9-red: |
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brightness device max_brightness power subsystem trigger uevent |
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(same is /sys/bus/i2c/devices/6-0009/leds) |
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We can control the colors separated into red, green and blue and |
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assign triggers on each color. |
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E.g.:: |
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$ cat blinkm-6-9-blue/brightness |
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05 |
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$ echo 200 > blinkm-6-9-blue/brightness |
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$ |
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$ modprobe ledtrig-heartbeat |
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$ echo heartbeat > blinkm-6-9-green/trigger |
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$ |
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b) Sysfs group to control rgb, fade, hsb, scripts ... |
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##################################################### |
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This extended interface is available as folder blinkm |
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in the sysfs folder of the I2C device. |
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E.g. below /sys/bus/i2c/devices/6-0009/blinkm |
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$ ls -h /sys/bus/i2c/devices/6-0009/blinkm/ |
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blue green red test |
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Currently supported is just setting red, green, blue |
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and a test sequence. |
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E.g.:: |
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$ cat * |
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00 |
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00 |
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00 |
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#Write into test to start test sequence!# |
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$ echo 1 > test |
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$ |
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$ echo 255 > red |
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$ |
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as of 6/2012 |
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dl9pf <at> gmx <dot> de
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