Buttons ready

Yesterday I had a little time to go on with my high speed photo controller project. I added three more buttons. The circuits are exactly the same as for the first button. Here is a picture:

Buttons assembled

As you can see, I put every button connector two a new column. This way it was easy to wire them and I needed to make cuts only between the connector pins. I also changed the code of the controller:

// include the library code:
 #include <LiquidCrystal.h>

 const int numRows = 2;
 const int numCols = 16;

 const int lcdBackLightPin = 12;
 const int upButtonPin = 6;
 const int downButtonPin = 5;
 const int setButtonPin = 4;
 const int resetButtonPin = 3;

 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(13, 11, 10, 9, 8, 7);

 void setup() {
 // set up the LCD's number of rows and columns:
 lcd.begin(numRows, numCols);
 lcd.clear();
 lcd.setCursor(5, 1);
 lcd.print("XistiX");
 digitalWrite(lcdBackLightPin, HIGH);

 pinMode(lcdBackLightPin, OUTPUT);
 pinMode(upButtonPin, INPUT);
 pinMode(downButtonPin, INPUT);
 pinMode(setButtonPin, INPUT);
 pinMode(resetButtonPin, INPUT);
 }

 void loop() {
 if(digitalRead(upButtonPin))
 {
 lcd.setCursor(0, 0);
 lcd.print("UP Button");
 }
 else if(digitalRead(downButtonPin))
 {
 lcd.setCursor(0, 0);
 lcd.print("DOWN Button");
 }
 else if(digitalRead(setButtonPin))
 {
 lcd.setCursor(0, 0);
 lcd.print("SET Button");
 }
 else if(digitalRead(resetButtonPin)

)

 {

 lcd.setCursor(0, 0);

 lcd.print("RESET Button");

 }

 else

 {

 lcd.setCursor(0, 0);

 lcd.print("            ");

 }

 }

It prints to the screen which button is pressed. When you check the source you will notice that buttons actually has a priority order and you can’t press two more than one button at the same time. I used an if else if structure. I will change this later. It is simply so because it was the easiest to test the buttons and update the screen.

You can download the code as a file from here: xISTIx_Buttons