/* Made by Jefferson Sandoval during the Embedded programming for the FabAcademy2021
 *  
 * This is just a simple testing code in C consisting of a button and a led, the led 
 * is going to blink 4 times depending on how long the button is pushed.
 * 
 * This code was uploaded to a board with an Attiny1614 microcontroller. Documentation:
 * http://fabacademy.org/2021/labs/kamplintfort/students/jefferson-sandoval/assignments/week09/
 */

#define F_CPU 3333333 //equals the frequency (20MHz) divided by 6
#include <avr/io.h>
#include <util/delay.h>

int main(void)
{
  PORTA.DIR |= PIN3_bm;  // Set LED as an output
  PORTA.DIR &= ~PIN2_bm; // Set button as an input
  PORTA.PIN2CTRL = PORT_PULLUPEN_bm; // Set PullUp resistors configuration
  uint8_t counter = 0;
  
  while (true)
  {
    if(~PORTA.IN & PIN2_bm) // Check if button is pressed
    {
      while(~PORTA.IN & PIN2_bm) { // While button is being pressed...
        _delay_ms(100); // Add 1 to the counter every 0.1 secs
        counter++;}
     }
        
      if (counter > 0){
        if(counter>=20) {
          for(uint8_t i = 0; i < 4 ; i++)
           {_delay_ms(1000);        // Wait for a sec
            PORTA.OUT |= PIN3_bm;   // Turn led on
            _delay_ms(1000);        // Wait for a sec
            PORTA.OUT &= ~PIN3_bm;} // Turn led off
          }
        else{
          for(uint8_t i = 0; i < 4 ; i++)
           {_delay_ms(250);         // Wait for 0.25 secs
            PORTA.OUT |= PIN3_bm;   // Turn led on
            _delay_ms(250);         // Wait for 0.25 secs
            PORTA.OUT &= ~PIN3_bm;} // Turn led off
          }
      } else {PORTB.OUT &= ~PIN5_bm;}
      counter = 0;
  }
  return (0);
}