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Overview

The component MENU has five switches which could be used for control tasks.

Example

A sample project for the Arduino IDE is provided in Button.ino which could be downloaded here

Activating the component

The component has a dip switch SW401 for activating the buttons. Each of the five buttons is connected to one IO port. Switch 1 is not connected and therefore the state of this switch is not relevant. The buttons are connected to the following ports

Function SWITCH IO port Conflicts with Remarks
Button UP 6 34 CAMERA, SW400-3, D7; GROVE, UART, SW205-1, ADC6
Button LEFT 3 26 CAMERA, SW402-6, D4; Audio, SW306-2, BCKL
Button CENTER 4 27 CAMERA, SW402-5, D3; SD CARD, SW407-2, CDET
Button RIGHT 5 32 CAMERA, SW400-4, VSYNC; SD CARD, SW407-1, LED
Button DOWN 2 25 CAMERA, SW400-1, D5; Audio, SW306-3, LRCLK

Using the component

It's very important to switch on the right switches on SW401. Additonally it's recommend to define constants for the IO ports of the appropriate ports. This could be done as follows:

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#define BTN_UP      34
#define BTN_DOWN    25
#define BTN_LEFT    26
#define BTN_RIGHT   32
#define BTN_CENTER  27

Before you could use the buttons, you have to setup the io ports.

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void setup()
{

    pinMode(BTN_UP,INPUT);
    pinMode(BTN_DOWN,INPUT);
    pinMode(BTN_LEFT,INPUT);
    pinMode(BTN_RIGHT,INPUT);
    pinMode(BTN_CENTER,INPUT);

}
If you want to see debug messages on the serial monitor you have to add the following line in the setup method:

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    Serial.begin(115200);

Now you could read the state from the Button. If you press the button you get a 0, otherwise you get a 1.

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void loop()
{
 Serial.print(digitalRead(BTN_UP));
 delay(250);
}

Sample project

A sample project for the Arduino IDE is provided in Button.ino which could be downloaded here