File content as of revision 8:39172c01c0f1:

#include "mbed.h"
#include <mpr121.h>
#include <string>
#include "Shiftbrite.h"
//Print output to pc via usb
RawSerial  pc(USBTX, USBRX);
//Print output to Bluetooth device
RawSerial  dev(p9,p10);
//LEDs
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

//Interrupt for Touchpad
InterruptIn interrupt(p26);
//I2C for Touchpad 
I2C i2c(p28, p27);
//Touchpad 
Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
//Shiftbrite
Shiftbrite myShiftbrite(p16, p15, p11, p12, p13);

//Code Combinations
int code1[] = {1,1,1,1};
int code2[] = {2,2,2,2};
int code3[] = {8,8,8,8};//Key 4 (labeled 3) on touchpad

volatile int input[4]; //stores input values
volatile int inNdx = 0;//to place combination in input
bool codeIn = false; //determine if code is being entered via bluetooth


//Interrupt method to read from touchpad
void fallInterrupt() {
       int key_code=0;
       int i = 0;
    int value=mpr121.read(0x00);
    value +=mpr121.read(0x01)<<8;
    //output value to onboard LEDs
    for (i=0; i<12; i++) {
        if (((value>>i)&0x01)==1) key_code=i+1;
        }
    led4=key_code & 0x01;
    led3=(key_code>>1) & 0x01;
    led2=(key_code>>2) & 0x01;
    led1=(key_code>>3) & 0x01;
    //ignore second character and input value into inputNdx
    if (value > 0){
    input[inNdx] = value;
    inNdx++;  
    }

  
    
}

//receive value from bluetooth device
void dev_recv()
{
    string temp ="";
    led1 = !led1;
    while(dev.readable()) {
        //pc.putc(dev.getc());
        if(!codeIn){
            if(dev.getc() == 'a'){
                dev.printf("Send code 4 digit code.\n"); 
                inNdx = 0;
                codeIn = true;
               // myShiftbrite.write(0,0,255);
            } 
            else {dev.printf("Command not recognized");}
        } else {
        //    pc.printf("BT entered: %c\n", dev.getc());
            input[inNdx] = dev.getc() - '0';
            if(input[inNdx] > -1){  
            dev.printf("Just entered: %d", input[inNdx]);  
            inNdx++;}
            //break;
        }
    }
    
}
//receive value from PC
void pc_recv()
{
    led4 = !led4;
    while(pc.readable()) {
        dev.putc(pc.getc());
    }
}

int main()
{
    //reset Shiftbrite
    myShiftbrite.write(0,0,0);
    pc.baud(9600);
    dev.baud(9600);
    //Set up interrupt
    interrupt.fall(&fallInterrupt);
    interrupt.mode(PullUp);
    //Set up read methods bluetooth and PC
    pc.attach(&pc_recv, Serial::RxIrq);
    dev.attach(&dev_recv, Serial::RxIrq);
    
    dev.printf("Monitoring Locked Device\n");
    dev.printf("To unlock the device remotely, send 'a'.\n");

    while(1) {
         wait(5);
        //If three characters have been entered, attempt to unlock
        if (inNdx > 3) {
            dev.printf("Attempting to Unlock\n");
            codeIn = false;
            bool c1 = true; bool c2 = true; bool c3 = true;
            //check entered code against saved codes
            for(int x = 0; x <= 3; x++){
                //if no code matches, end loop
                if(!(c1 | c2 | c3)) {
                    break;    
                } else {
                    //compare codes
                    if (code1[x] != input[x]){c1 = false;}
                    if (code2[x] != input[x]){c2 = false;}
                    if (code3[x] != input[x]){c3 = false;}
                    
                }   
            }
            if(c1){
                //Send welcome user 1 to bluetooth
                dev.printf("Welcome User 1\n");
                myShiftbrite.write(0,255,0);
            } else if(c2) {
                //Send welcome user 2 to bluetooth
                dev.printf("Welcome User 2\n");
                myShiftbrite.write(0,255,0);
            } else if(c3) {
                //Send welcome user 3 to bluetooth
                dev.printf("Welcome User 3\n");
                myShiftbrite.write(0,255,0);
            } else {
                //Send welcome Try Again message to bluetooth
                dev.printf("Try Again\n");
                myShiftbrite.write(255,0,0); 
 
            }
            //reset indexing variable when checking is complete
            inNdx = 0;
            
        }
    }
    
}