How do you decrement by specific value.. Im trying to decrement it by 50 for every 1 second... I got the counter to count down by 1 second and now I only need to subtract it by 50 to get the value I need when button is pressed.
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,6,5,4,3);
// this constant won't change:
const int buttonPin = 2; // the pin that the pushbutton is attached to
// the pin that the LED is attached to
// Variables will change:
int buttonPushCounter = 0; // counter for the number of button presses
int buttonState = 0; // current state of the button
int lastButtonState = 0; // previous state of the button
int value =0; //Set value for subracted buttonstate
void setup() {
// initialize the button pin as a input:
pinMode(buttonPin, INPUT);
// initialize the LED as an output:
// initialize serial communication:
Serial.begin(9600);
}
void loop() {
// read the pushbutton input pin:
buttonState = digitalRead(buttonPin);
// compare the buttonState to its previous state
if (buttonState == HIGH) {
buttonPushCounter ++;
value=10000 - buttonPushCounter;
delay(1000);
Serial.println(value);
lcd.setCursor(7,1);
lcd.print(value);
if (value<1){
lcd.setCursor(0,1);
lcd.print("RELOAD");
delay (100);
exit(0);
}
}
// save the current state as the last state, for next time through the loop
lastButtonState = buttonState;
}