mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
62 lines
2.6 KiB
Markdown
62 lines
2.6 KiB
Markdown
|
|
[](https://github.com/marketplace/actions/arduino_ci)
|
|
[](https://github.com/RobTillaart/M62429/blob/master/LICENSE)
|
|
[](https://github.com/RobTillaart/M62429/releases)
|
|
|
|
# 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
|