Arduino library for controlling analog/digital multiplexers (A/D mux) like those belonging to the CMOS 4000 series (e.g. 4051 (CD4051, 74HC4051), 4067 (CD4067, 74HC4067)).
This library was forked from project MUX74HC4067 (https://github.com/nlamprian/MUX74HC4067) in order to generalize and streamline its functionalities at both interface and implementation levels.
Currently, two common ICs are explicitly implemented (Type4051Mux and Type4067Mux); others can be controlled through the generic class (GenericMux).
This library provides several examples that demonstrate its functionalities; they all revolve around the same simple life cycle:
- Object initialization
MCU pins are assigned to signal and channel control:
// Mux declared with analog input signal on pin A0 and channel control on digital pins 8, 9, 10 and 11.
Type4067Mux mux(A0, INPUT, ANALOG, 8, 9, 10, 11);The signal pin can also be assigned (and possibly replaced) through the setSignalPin method.
- Object I/O
After selecting the channel, read/write operations can be invoked:
// Select 3rd channel!
mux.setChannel(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 setSignalPin 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 setEnabled method controls whether the mux I/O operates.