/* STM32 Blue Pill project using the STM32 Arduino Core (stm32duino) */
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSans12pt7b.h>
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

unsigned long debounceTime = 0; 
int setvoltage = 535;

void setup() {
  Serial.begin(115200);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); 
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(12, 0);
  display.println(" EMERSON ");
  display.setTextSize(1);
  display.setCursor(10, 20);
  display.println("Rectifier R48-1000 ");
  display.display();
  delay(1000);
}

void loop() {

  if (digitalRead(PA0) == HIGH) {
    if (millis() - debounceTime > 150) {
      debounceTime = millis();
      if (setvoltage < 575) setvoltage = setvoltage + 1;
      Serial.println(setvoltage);
    }
  }
  
  if (digitalRead(PA1) == HIGH) {
    if (millis() - debounceTime > 150) {
      debounceTime = millis();
      if (setvoltage > 435) setvoltage = setvoltage - 1;
      Serial.println(setvoltage);
    }
  }

  if (digitalRead(PA2) == HIGH) {
    if (millis() - debounceTime > 150) {
      debounceTime = millis();
      
      Serial.println("Menu");
    }
  }

}