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2.6 KiB
2.6 KiB
M62429
Arduino library for M62429 volume control IC
Description
This library is used to set the attenuation (volume) of the M62429 IC a.k.a. FM62429.
The communication needs a minimum delay of 1.6 microseconds. This is defined in the library in M62429_CLOCK_DELAY == 2 For AVR (UNO, slow device) it is defined as 0, as the digitalWrite takes time enough.
For faster processors this define can be overruled runtime by setting it before including "M62429.h" or by defining it as commandline parameter.
Interface
The interface is straightforward
- begin(dataPin, clockPin) defines the clock and data pin. One has to create one object per IC.
- getVolume(channel) channel is 0 or 1 or 2 (both). In the latter case the volume of channel 0 is used as volume of both channels.
- setVolume(uint8_t channel, uint8_t volume) channel = { 0, 1, 2 = both; volume = {0 .. 255 }
- incr() increment volume of both channels until max is reached. This is another way to set volume that is better suited for a rotary encoder or a [+] button
- decr() decrement volume of both channels until 0 is reached. See incr().
- average() averages the 2 channels to same = average level.
Sort of set balance in the middle functionality. - muteOn() silences both channels but remembers the volume.. GetVolume() will return the 'saved' volume value.
- muteOff() resets the volume per channel again.
- isMuted() returns the muted state.
Future
- Control multiple M62429 IC's with one class. This could work with one shared datapin and one clockpin per IC. An idea might be to use one PCF8575 to have 1 datapin and 15 clockpins. That would allow for 15 stereo channels or 30 mono channels. Runtime configuration mono / stereo would be cool.
- model with one volume(0..100%) and one balance(-100..100).
Also a left() and right() incremental balance might be added. This could work better than 2 separate volume channels. - change getVolume(both) to return max of the two channels?
- muteOff() should increase gradually.
- Mute() could be per channel, default = both / all.
- find a big can filled with time ...
Operation
See examples