Arduino library for controlling analog/digital multiplexers (A/D mux) of any size, like CMOS 4000 series (8-channel 4051 (CD4051, 74HC4051, CD74HC4051), 16-channel 4067 (CD4067, 74HC4067, CD74HC4067), etc.), dual-16- (ADG726) and 32-channel (ADG732) MegaMUX, and so on.
This library was forked from project MUX74HC4067 in order to generalize and streamline its functionalities at both interface and implementation levels.
All ICs are supported by a common implementation (Mux).
This library provides several examples that demonstrate its functionalities; they all revolve around the same simple life cycle:
- Initialization
MCU pins are assigned to signal and channel control:
using namespace admux; // 16-channel Mux declared with analog input signal on pin A0 and channel control on digital pins 8, 9, 10 and 11. Mux mux(Pin(A0, INPUT, PinType::Analog), Pinset(8, 9, 10, 11));
The signal pin can also be assigned (and possibly replaced) through the
signalPin(..)method. - I/O
After selecting the channel, read/write operations can be invoked:
// Select 3rd channel! mux.channel(2); // Read data from the current channel (that is 3rd)! int16_t data = mux.read();
Alternatively, the channel can be directly specified within the read/write operation:
// Read data from the 3rd channel! int16_t data = mux.read(2);
The same mux can be physically connected to multiple signal pins at once, as any invocation to signalPin(..) method ensures that the previous pin is set to high impedance state before switching to the new one.
Conversely, the same signal pin can be physically connected to multiple ICs through a common data line, as enabled(..) method controls whether the mux I/O operates.
Project building and testing are based on PlatformIO.
Run unit tests through this command:
pio test