carb-sync/twinmax/twinmax.ino

#include "twinmax.h"

#include <Arduino.h>
#include <SoftwareSerial.h>
#include <Wire.h>

Display       oled(4);
Pressure      pleft;
Pressure      pright;
PushButton    btn;
Potentiometer slider;

void setup()
{
	Wire.begin();
	Wire.setClock(400000L);

	pleft.setup(PRESSURE_LEFT);
	pright.setup(PRESSURE_RIGHT);
	btn.setup(PUSH_BTN_PIN);
	slider.setup(POTENTIOMETER_PIN);

	Serial.begin(9600);

	oled.begin();
	oled.clear();
	oled.apply();
}

void loop()
{
	if( btn.tap() ){
		mode = (mode == RELATIVE) ? ABSOLUTE : RELATIVE;
	}

	oled.clear();
	if( mode == RELATIVE ){
		const int16_t left  = pleft.value();
		const int16_t right = pright.value();

		// print absolute
		oled.progress(left,  10, 15);
		oled.progress(right, 20, 25);

		// relative
		double diff = (right - left);
		diff = diff * slider.range() / 128.0;
		oled.progress(512 + diff, 0, 5, false);
		oled.apply();
	}

	if( mode == ABSOLUTE ){
		oled.apply();
	}

	// delay(100);
}