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push button doesn't works (beginner)
05-11-2015, 06:26 PM,
#1
push button doesn't works (beginner)
hello guys,

i'm new about pinguino and i'm trying to experiment some examples like "change state".

mi pinguino use PIC 2550.

my board is this (see the picture)

i'm follow the schema but... it doesn't work.

any ideas??

thanks    
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05-11-2015, 06:28 PM,
#2
RE: push button doesn't works (beginner)
Quote: p, li { white-space: pre-wrap; }

/*
State change detection (edge detection)

Often, you don't need to know the state of a digital input all the time,
but you just need to know when the input changes from one state to another.
For example, you want to know when a button goes from OFF to ON. This is called
state change detection, or edge detection.

This example shows how to detect when a button or button changes from off to on
and on to off.

The circuit:
* pushbutton attached to pin 2 from +5V
* 10K resistor attached to pin 2 from ground
* LED attached from pin 13 to ground (or use the built-in LED on
most Arduino boards)

created 27 Sep 2005
modified 14 Oct 2010
by Tom Igoe

This example code is in the public domain.

http://arduino.cc/en/Tutorial/ButtonStateChange

*/

// this constant won't change:
const int buttonPin = 2; // the pin that the pushbutton is attached to
//const int ledPin = 13; // 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

void setup() {
// initialize the button pin as a input:
pinMode(buttonPin, INPUT);
// initialize the LED as an output:
pinMode(USERLED, 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 != lastButtonState) {
// if the state has changed, increment the counter
if (buttonState == HIGH) {
// if the current state is HIGH then the button
// wend from off to on:
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.printNumber(buttonPushCounter, DEC);
Serial.println("");
}
else {
// if the current state is LOW then the button
// wend from on to off:
Serial.println("off");
}
}
// save the current state as the last state,
//for next time through the loop
lastButtonState = buttonState;


// turns on the LED every four button pushes by
// checking the modulo of the button push counter.
// the modulo function gives you the remainder of
// the division of two numbers:
if (buttonPushCounter % 4 == 0) {
digitalWrite(USERLED, HIGH);
} else {
digitalWrite(USERLEDl, LOW);
} p, li { white-space: pre-wrap; }

/*
State change detection (edge detection)

Often, you don't need to know the state of a digital input all the time,
but you just need to know when the input changes from one state to another.
For example, you want to know when a button goes from OFF to ON. This is called
state change detection, or edge detection.

This example shows how to detect when a button or button changes from off to on
and on to off.

The circuit:
* pushbutton attached to pin 2 from +5V
* 10K resistor attached to pin 2 from ground
* LED attached from pin 13 to ground (or use the built-in LED on
most Arduino boards)

created 27 Sep 2005
modified 14 Oct 2010
by Tom Igoe

This example code is in the public domain.

http://arduino.cc/en/Tutorial/ButtonStateChange

*/

// this constant won't change:
const int buttonPin = 2; // the pin that the pushbutton is attached to
//const int ledPin = 13; // the pin that the LED is attached to  <------ use the default led

// 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

void setup() {
// initialize the button pin as a input:
pinMode(buttonPin, INPUT);
// initialize the LED as an output:
pinMode(USERLED, 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 != lastButtonState) {
// if the state has changed, increment the counter
if (buttonState == HIGH) {
// if the current state is HIGH then the button
// wend from off to on:
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.printNumber(buttonPushCounter, DEC);
Serial.println("");
}
else {
// if the current state is LOW then the button
// wend from on to off:
Serial.println("off");
}
}
// save the current state as the last state,
//for next time through the loop
lastButtonState = buttonState;


// turns on the LED every four button pushes by
// checking the modulo of the button push counter.
// the modulo function gives you the remainder of
// the division of two numbers:
if (buttonPushCounter % 4 == 0) {
digitalWrite(USERLED, HIGH);
} else {
digitalWrite(USERLEDl, LOW);
}

}




}
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05-11-2015, 06:37 PM,
#3
RE: push button doesn't works (beginner)
   
schema.
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05-11-2015, 11:19 PM,
#4
RE: push button doesn't works (beginner)
Be careful for a true pic18f2550 Pinguino board >> USERLED is pin18 (pinguino designation) which is RA4 (Microchip designation).
See page http://wiki.pinguino.cc/index.php/PIC18F2550_Pinguino.
Verify on your board - which is not an official 18f2550 Pinguino board - what is connected to RA4 pin.
For me your code works with a well-chosen ledpin.
Bye
André
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