/*
   程序：  ESP32 OLED 使用 U8G2库
          大家可以尝试一下改写成为FREERTOS
   公众号：孤独的二进制
*/
#include <U8g2lib.h>
#include <Wire.h>

#include "Font7Seg.h"

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

const int out05 =  5;        // Status LED
const int out04 =  4;
const int out02 =  2;  

const int output = 5;
const int buttonPin = 15;

void setup() {
  Serial.begin(9600);

  u8g2.begin();

  pinMode(out02, OUTPUT);
  pinMode(out04, INPUT_PULLUP);

  pinMode(buttonPin, INPUT_PULLUP);  // 15
}

int x;

void loop() {
  
  u8g2.clearBuffer();					// clear the internal memory
  u8g2.setFont(u8g2_font_baby_tf);	// choose a suitable font
  u8g2.drawStr(15, 10, "LONELY BINARY");	// write something to the internal memory
  u8g2.sendBuffer();					// transfer internal memory to the display
  
  x = digitalRead(out04);
  Serial.println("3 " +  String(x));
  x = digitalRead(buttonPin);
  Serial.println("4 " +  String(x));

  digitalWrite(out02, HIGH);
  delay(500);
  digitalWrite(out02, LOW);
  delay(500);
 
}