/*
Button Pressing Testing
*/
#include <avr/wdt.h>
#define BUTTON_PIN 7 // Button pin
#define LED_PIN 13 // Led pin
#define BUTTONS_SAMPLES 6000 // Affect the sensitivity of the button
#define BUTTON_PRESSED LOW // The state of the pin when button pressed
unsigned int o_prell = 0; // counter for button pressing detection
boolean button_state = false;
unsigned int led_state = LOW; // Led off at the beginning
void setup()
{
Serial.begin(9600);
pinMode(BUTTON_PIN, INPUT);
pinMode(LED_PIN, OUTPUT);
// set initial LED state
digitalWrite(LED_PIN, led_state);
wdt_enable(WDTO_1S); // enable the watchdog timer : 1 second timer
}
void loop()
{
wdt_reset(); // feed the dog
check_button();
digitalWrite(LED_PIN, led_state);
if (Serial.available()>0)
{
while(1) ;
}
}
void check_button()
{
int button_input = digitalRead(BUTTON_PIN);
if ((button_input == BUTTON_PRESSED) && (o_prell < BUTTONS_SAMPLES))
{
o_prell++; // counting for button pressing
}
else if ((button_input == BUTTON_PRESSED) && (o_prell == BUTTONS_SAMPLES) && !button_state)
{
button_state = true; // button pressed
//led_state = HIGH;
led_state = !led_state;
}
else if ((button_input != BUTTON_PRESSED) && (o_prell > 0))
{
o_prell--; // counting for button releasing, or debouncing / immunity
}
else if ((button_input != BUTTON_PRESSED) && (o_prell == 0) && button_state)
{
button_state = false;
//led_state = LOW;
}
}
