#include <U8g2lib.h>
#define PIN_DCC_IN 4
uint8_t Speed = 0;
uint8_t volume = 180;
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE, /* clock=*/ 26, /* data=*/ 25);

void speed_task(void *ptr)
{
  pinMode(PIN_DCC_IN, INPUT);
  while (1)
  {
    Speed = map(analogRead(PIN_DCC_IN), 0, 4096, 0, 256);
    vTaskDelay(100);
  }
}

void setup() {
  // put your setup code here, to run once:
  u8g2.begin();
  u8g2.enableUTF8Print();
  xTaskCreatePinnedToCore(speed_task, "Give Speed", 1024 * 2, NULL, 11, NULL, 1);
}

void loop() {
  u8g2.clearBuffer();					// clear the internal memory
  u8g2.setFont(u8g2_font_timB10_tf);	// choose a suitable font
  u8g2.drawStr(10, 14, "Spd ");
  u8g2.setCursor(45, 14);
  u8g2.print(Speed);
  u8g2.drawStr(70, 14, "Vol ");
  u8g2.setCursor(105, 14);
  u8g2.print(volume);
  u8g2.drawHLine(6, 16, 166);
  u8g2.setFont(u8g2_font_helvR08_tf);
  u8g2.setDrawColor(0);
  u8g2.drawStr(6, 30, "CH01");
  u8g2.setDrawColor(1);
  u8g2.drawStr(70, 30, "CH02");
  u8g2.drawStr(6, 45, "CH03");
  u8g2.drawStr(70, 45, "CH04");
  u8g2.drawStr(6, 60, "CH05");
  u8g2.drawStr(70, 60, "CH06");
  //----------Channel Grains------------
  u8g2.setCursor(44, 30);
  u8g2.print(u8x8_u8toa(random(0, 255), 3));
  u8g2.setCursor(108, 30);
  u8g2.print(u8x8_u8toa(0, 3));
  u8g2.setCursor(44, 45);
  u8g2.print(random(0, 255));
  u8g2.setCursor(108, 45);
  u8g2.print(random(0, 255));
  u8g2.setCursor(44, 60);
  u8g2.print(random(0, 255));
  u8g2.setCursor(108, 60);
  u8g2.print(random(0, 255));


  u8g2.sendBuffer();					// transfer internal memory to the display
  delay(1000);
}