1*8dab9197SMauro Carvalho Chehab================== 2*8dab9197SMauro Carvalho ChehabLeds BlinkM driver 3*8dab9197SMauro Carvalho Chehab================== 4*8dab9197SMauro Carvalho Chehab 5*8dab9197SMauro Carvalho ChehabThe leds-blinkm driver supports the devices of the BlinkM family. 6*8dab9197SMauro Carvalho Chehab 7*8dab9197SMauro Carvalho ChehabThey are RGB-LED modules driven by a (AT)tiny microcontroller and 8*8dab9197SMauro Carvalho Chehabcommunicate through I2C. The default address of these modules is 9*8dab9197SMauro Carvalho Chehab0x09 but this can be changed through a command. By this you could 10*8dab9197SMauro Carvalho Chehabdasy-chain up to 127 BlinkMs on an I2C bus. 11*8dab9197SMauro Carvalho Chehab 12*8dab9197SMauro Carvalho ChehabThe device accepts RGB and HSB color values through separate commands. 13*8dab9197SMauro Carvalho ChehabAlso you can store blinking sequences as "scripts" in 14*8dab9197SMauro Carvalho Chehabthe controller and run them. Also fading is an option. 15*8dab9197SMauro Carvalho Chehab 16*8dab9197SMauro Carvalho ChehabThe interface this driver provides is 2-fold: 17*8dab9197SMauro Carvalho Chehab 18*8dab9197SMauro Carvalho Chehaba) LED class interface for use with triggers 19*8dab9197SMauro Carvalho Chehab############################################ 20*8dab9197SMauro Carvalho Chehab 21*8dab9197SMauro Carvalho ChehabThe registration follows the scheme:: 22*8dab9197SMauro Carvalho Chehab 23*8dab9197SMauro Carvalho Chehab blinkm-<i2c-bus-nr>-<i2c-device-nr>-<color> 24*8dab9197SMauro Carvalho Chehab 25*8dab9197SMauro Carvalho Chehab $ ls -h /sys/class/leds/blinkm-6-* 26*8dab9197SMauro Carvalho Chehab /sys/class/leds/blinkm-6-9-blue: 27*8dab9197SMauro Carvalho Chehab brightness device max_brightness power subsystem trigger uevent 28*8dab9197SMauro Carvalho Chehab 29*8dab9197SMauro Carvalho Chehab /sys/class/leds/blinkm-6-9-green: 30*8dab9197SMauro Carvalho Chehab brightness device max_brightness power subsystem trigger uevent 31*8dab9197SMauro Carvalho Chehab 32*8dab9197SMauro Carvalho Chehab /sys/class/leds/blinkm-6-9-red: 33*8dab9197SMauro Carvalho Chehab brightness device max_brightness power subsystem trigger uevent 34*8dab9197SMauro Carvalho Chehab 35*8dab9197SMauro Carvalho Chehab(same is /sys/bus/i2c/devices/6-0009/leds) 36*8dab9197SMauro Carvalho Chehab 37*8dab9197SMauro Carvalho ChehabWe can control the colors separated into red, green and blue and 38*8dab9197SMauro Carvalho Chehabassign triggers on each color. 39*8dab9197SMauro Carvalho Chehab 40*8dab9197SMauro Carvalho ChehabE.g.:: 41*8dab9197SMauro Carvalho Chehab 42*8dab9197SMauro Carvalho Chehab $ cat blinkm-6-9-blue/brightness 43*8dab9197SMauro Carvalho Chehab 05 44*8dab9197SMauro Carvalho Chehab 45*8dab9197SMauro Carvalho Chehab $ echo 200 > blinkm-6-9-blue/brightness 46*8dab9197SMauro Carvalho Chehab $ 47*8dab9197SMauro Carvalho Chehab 48*8dab9197SMauro Carvalho Chehab $ modprobe ledtrig-heartbeat 49*8dab9197SMauro Carvalho Chehab $ echo heartbeat > blinkm-6-9-green/trigger 50*8dab9197SMauro Carvalho Chehab $ 51*8dab9197SMauro Carvalho Chehab 52*8dab9197SMauro Carvalho Chehab 53*8dab9197SMauro Carvalho Chehabb) Sysfs group to control rgb, fade, hsb, scripts ... 54*8dab9197SMauro Carvalho Chehab##################################################### 55*8dab9197SMauro Carvalho Chehab 56*8dab9197SMauro Carvalho ChehabThis extended interface is available as folder blinkm 57*8dab9197SMauro Carvalho Chehabin the sysfs folder of the I2C device. 58*8dab9197SMauro Carvalho ChehabE.g. below /sys/bus/i2c/devices/6-0009/blinkm 59*8dab9197SMauro Carvalho Chehab 60*8dab9197SMauro Carvalho Chehab $ ls -h /sys/bus/i2c/devices/6-0009/blinkm/ 61*8dab9197SMauro Carvalho Chehab blue green red test 62*8dab9197SMauro Carvalho Chehab 63*8dab9197SMauro Carvalho ChehabCurrently supported is just setting red, green, blue 64*8dab9197SMauro Carvalho Chehaband a test sequence. 65*8dab9197SMauro Carvalho Chehab 66*8dab9197SMauro Carvalho ChehabE.g.:: 67*8dab9197SMauro Carvalho Chehab 68*8dab9197SMauro Carvalho Chehab $ cat * 69*8dab9197SMauro Carvalho Chehab 00 70*8dab9197SMauro Carvalho Chehab 00 71*8dab9197SMauro Carvalho Chehab 00 72*8dab9197SMauro Carvalho Chehab #Write into test to start test sequence!# 73*8dab9197SMauro Carvalho Chehab 74*8dab9197SMauro Carvalho Chehab $ echo 1 > test 75*8dab9197SMauro Carvalho Chehab $ 76*8dab9197SMauro Carvalho Chehab 77*8dab9197SMauro Carvalho Chehab $ echo 255 > red 78*8dab9197SMauro Carvalho Chehab $ 79*8dab9197SMauro Carvalho Chehab 80*8dab9197SMauro Carvalho Chehab 81*8dab9197SMauro Carvalho Chehab 82*8dab9197SMauro Carvalho Chehabas of 6/2012 83*8dab9197SMauro Carvalho Chehab 84*8dab9197SMauro Carvalho Chehabdl9pf <at> gmx <dot> de 85