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LP55231: register-based auto-fade of LED(s) possible w/o microprogramming?

B. Wiese1
Prodigy 10 points
Other Parts Discussed in Thread: LP55231

Hi folks...

Appears I'll be using a TI LP55231 to do some LED management & dimming....

Looked thru the doc but not clear immediately - is it possible to dim LED(s)  [individually or a group]
without writing a microcode program?  

Perhaps by triggering some sort of auto-decrement of a fader register? [I don't wanna keep sending
I2C commands to decrement a fader or master fader register, either - too much traffic/overhead/grief.]

Was hoping to initialize a bunch of registers,  issue a "Go" thru a register hit or two,  and then fader
register(s) would ramp down automagically.


Thanks...
-Bill

  • 0
    TI__Intellectual 2510 points

    Hi Bill,

    Unfortunately the is no auto-decrement of a fader register.

    You can group the LED outputs and control them via single I2C register

    The microcode that is loaded into the LP55231 would do the trick. You would for example need to load the program, set-up the engine execution bits and then trigger the program execution with external trigger. You could also use the INT-pin or one I2C register to set your program change to different ramping sequences.

    BR,

    Sami