Teensy LC and WCMCU-4051

[abel]

Hi,

I'm unable to use the mux WCMCU-4051 with the teensyLC (tried with 2 different board).
Works perfectly with a Teensy 4.0 or 4.1.

What am I missing ?

Thank you for your help.

#include <Bounce.h>

const byte DEBOUNCE_TIME = 50;
const byte MULTIPLEXER_SWITCH_CHANNEL_DELAY = 50;

const byte MULTIPLEXER_IO_COUNT = 8;

const byte PIN_MULTIPLEXER_PIN_CHANNEL_1 = 0; 
const byte PIN_MULTIPLEXER_PIN_CHANNEL_2 = 1; 
const byte PIN_MULTIPLEXER_PIN_CHANNEL_3 = 2; 

const byte PIN_MULTIPLEX_BUTTONS = 3; 

const byte PIN_BUTTON_A = 4; 

Bounce buttons[MULTIPLEXER_IO_COUNT] = { 
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 1
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 2
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 3
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 4
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 5
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 6
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME), //BUTTON 7
  Bounce (PIN_MULTIPLEX_BUTTONS, DEBOUNCE_TIME)  //BUTTON 8
};

elapsedMicros multiplexerSwitchChannelTimeEllapsed;
byte currentMultiplexerChannel = 0;

Bounce buttonA = Bounce(PIN_BUTTON_A, DEBOUNCE_TIME * 2);

void setup() {
  Serial.begin(31250);

  pinMode(PIN_MULTIPLEX_BUTTONS, INPUT_PULLUP); 
  pinMode(PIN_BUTTON_A, INPUT_PULLUP);
}

void loop() {
  if (multiplexerSwitchChannelTimeEllapsed > MULTIPLEXER_SWITCH_CHANNEL_DELAY) {
    checkMultiplexButton(currentMultiplexerChannel);
    selectNextPinMultiplexChannel();
  }

  checkButtonA();
}

void checkMultiplexButton(byte multiplexerChannel) {
  buttons[multiplexerChannel].update(); 
  if (buttons[multiplexerChannel].fallingEdge()) {
    print("PRESSED : " + String(multiplexerChannel));
  } else if (buttons[multiplexerChannel].risingEdge()) {
    print("RELEASED : " + String(multiplexerChannel));
  }
}

void selectNextPinMultiplexChannel() {
  currentMultiplexerChannel += 1;
    if (currentMultiplexerChannel > MULTIPLEXER_IO_COUNT) {
      currentMultiplexerChannel = 0;
    }
   digitalWrite(PIN_MULTIPLEXER_PIN_CHANNEL_3, HIGH && (currentMultiplexerChannel & B00000100));
   digitalWrite(PIN_MULTIPLEXER_PIN_CHANNEL_2, HIGH && (currentMultiplexerChannel & B00000010));
   digitalWrite(PIN_MULTIPLEXER_PIN_CHANNEL_1, HIGH && (currentMultiplexerChannel & B00000001));

   multiplexerSwitchChannelTimeEllapsed = 0;
}

void checkButtonA() {
  buttonA.update();
  if (buttonA.fallingEdge()) {
    print("BUTTON A PRESSED");
  } else if (buttonA.risingEdge()) {
    print("BUTTON A RELEASED");
  }
}

void print(String s) {
  Serial.println(s);
}