sketch_LED

#include <SoftwareSerial.h>

int txPin = 2; //lcd output 
int shutterPin = 7;  //output to camera
const int startLEDPin = 13;  //visual display of timelapse running
const int focusPin = 8; //input for begin button
const int startPin = 3; //input for begin button
const int upPin = 4;  //input for up button
const int downPin = 5;  //input for down button
int count = 0;  //keeps track of number of pictures.
int time = 0;  //keeps track of time between pictures
int prevState = 0;
int newState = 0;
int prevStatetwo = 0;
int newStatetwo = 0;
int startState = 0;
int prevStartState = 0;

SoftwareSerial LCD = SoftwareSerial(2, txPin);
const int LCDdelay=10; 

// wbp: goto with row & column
void lcdPosition(int row, int col) {
  LCD.write(0xFE);   //command flag
  LCD.write((col + row*64 + 128));    //position 
  delay(LCDdelay);
}
void clearLCD(){
  LCD.write(0xFE);   //command flag
  LCD.write(0x01);   //clear command.
  delay(LCDdelay);
}
void backlightOn() {  //turns on the backlight
  LCD.write(0x7C);   //command flag for backlight stuff
  //LCD.write(157);    //light level.
  delay(LCDdelay);
}
void backlightOff(){  //turns off the backlight
  LCD.write(0x7C);   //command flag for backlight stuff
 // LCD.write(128);     //light level for off.
   delay(LCDdelay);
}
void serCommand(){   //a general function to call the command flag for issuing all other commands   
  LCD.write(0xFE);
}

void setup()
{
  pinMode(txPin, OUTPUT); //LCD is set to output
  pinMode(shutterPin, OUTPUT); //Sets shutter to output
  digitalWrite(shutterPin, LOW); //shuter pin is initially low
  pinMode(startPin, INPUT); //start/stop button is an input
  pinMode(startLEDPin, OUTPUT); //status LDed
  pinMode(upPin, INPUT); //Value up button is an input
  pinMode(downPin, INPUT); //value down button is an input
  count = 0; //varible for number of photos taken
  time = 0; //interval between photos
  LCD.begin(9600);
  updateLCD();
}
  
void loop(){
   newState = digitalRead(upPin);
  
   if (newState == 1 && prevState != newState) {
    time += 1;
    updateLCD();
   }
   prevState = newState;
  
   newStatetwo = digitalRead(downPin);
  
   if (newStatetwo == 1 && prevStatetwo != newStatetwo) {
      if (time > 0){
        time -= 1;
        updateLCD();
      }
   }
   prevStatetwo = newStatetwo;
   
   startState = digitalRead(startPin);
   if (startState == 1 && startState != prevStartState) {
     prevStartState = 1;
     boolean finish = false;
     while (finish == false) {
       
       startState = digitalRead(startPin);
       if (startState == 1 && startState != prevStartState) {
         time = -1;
         updateLCD();
         digitalWrite(startLEDPin, LOW);
         finish = true;
         break;
       }
       prevStartState = startState;
       digitalWrite(shutterPin, HIGH);
       delay (50);
       digitalWrite(shutterPin, LOW);
       digitalWrite(startLEDPin, HIGH);
       count += 1;
       updateLCD();
       delay(time * 1000);
     }
   }
   prevStartState = startState;
   
}
void updateLCD() {
  clearLCD();
  lcdPosition(0,0);
  LCD.print("Interval:"); //prints interval on the screen
  lcdPosition(0,13);
  LCD.print("Sec"); //prints unit of time on the screen
  lcdPosition(1,0);
  LCD.print("# of Photos:"); //prints # of photos on the screen
  lcdPosition(0,9);
  LCD.print(time); //prints interval in seconds
  lcdPosition(1,12);
  LCD.print(count); //prints the number of photos taken
}