I'm curious...

In post 33...

The choice to use nested "for" loops in "while" loops to poll for the button states, instead of "if" statements for example?

Is that a critical decision or just a preference?

Because nothing needs to happen until a button is pressed so just sitting in the while loop.

I might use if-statements if I had to check the buttons while still updating a multiplexed 7-seg display or similar intensive code was running.

 

But it's not going to sit in either one of those while loops waiting for a button push, it sits in the main loop waiting for the button presses.

 

But it's not going to sit in either one of those while loops waiting for a button push, it sits in the main loop waiting for the button presses.

No, it does sit in those while loops waiting for a button press.
The pull-up resistor on each inputs keeps the pin value = 1 (High) until a button is pressed.

 

No, it does sit in those while loops waiting for a button press.
The pull-up resistor on each inputs keeps the pin value = 1 (High) until a button is pressed.

Aren’t those pull ups redundant? Arduino compatibles has pull up resistors built in. You just have to modify the input pinMode statements to activate them.

These lines of code…

  pinMode(10, INPUT); //start
  pinMode(12, INPUT); //reset

…should be…

  pinMode(10, INPUT_PULLUP); //start
  pinMode(12, INPUT_PULLUP); //reset

 

Aren’t those pull ups redundant? Arduino compatibles has pull up resistors built in. You just have to modify the input pinMode statements to activate them.

These lines of code…

  pinMode(10, INPUT); //start
  pinMode(12, INPUT); //reset

…should be…

  pinMode(10, INPUT_PULLUP); //start
  pinMode(12, INPUT_PULLUP); //reset

They are but my simulator (used to make the animation and run the code) does not know how to do that.

 

They are but my simulator (used to make the animation and run the code) does not know how to do that.

Just so I’m clear… you’re using a simulator that produces poor code to teach a coding technique?

 

Just so I’m clear… you’re using a simulator that produces poor code to teach a coding technique?

I wouldn't call the use of external pull-ups, "poor code" and I would definitely not call what I was doing "teaching". Besides that, you are 100% correct.