/*
  * PWM Generator + POT + OLED Display + D5 PWM Out 
  * Visit https://www.twovolt.com for Schematic, PCB Layout and Arduino Code  
  * Modified code Original Autor: Eng. Wagner Rambo  www.wrkits.com.br 

*/

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// Definitions

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 4
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


// Global Variables
int   pwm = 0;
int   freq = 1;

// Initial Settings
void setup()   
{                
 
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  //Initializes OLED with I2C address 0x3C (for 128x64)
  display.clearDisplay();
  display.display();

  delay(100);
  
} //end setup

// --- Loop Infinito ---
void loop() 
{
  
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.clearDisplay();
  display.setCursor(80,10);
  display.print(pwm);
  display.print("%");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(80,40);
  display.print("PWM");
  display.setCursor(2,10);
  display.print(freq);
  display.print("Hz");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(2,40);
  display.print("FREQ");
  display.display();
  delay(1);
 
  pwm = map(analogRead(A0), 0, 1023, 0, 255);
  analogWrite(5, pwm);
  pwm = map(pwm, 0, 255, 0, 100);

  freq = map(analogRead(A1), 0, 1023, 1, 1024);
  analogWrite(13, freq);
  freq = map(freq, 1, 1024, 0, 1000);
  
  
} //end loop