#include <TinyWireM.h>
#include <Tiny4kOLED.h>

const int SLIDER_PIN = A0;   // pino do potenciometro

void setup() {
  TinyWireM.begin();
  oled.begin(128, 64, sizeof(tiny4koled_init_128x64r), tiny4koled_init_128x64r); //Inicializa o display
  oled.clear(); //Limpa o display
  oled.on();
  oled.setFont(FONT6X8); //Seleciona fonte 6x8
  delay(1000);
}

void loop() {
  int raw = analogRead(SLIDER_PIN);
  int bpm = map(raw, 0, 1023, 80, 440);
  unsigned long halfPeriod = 60000UL / (unsigned long)bpm / 2UL;
  oled.setCursor(10, 1);
  oled.print(bpm);
  oled.setCursor(60, 1);
  oled.print(halfPeriod);
  delay(3000);
  oled.clear();
}