File content as of revision 6:076572f58a5e:

#include "mbed.h"
#include "uLCD_4DGL.h"
#include "rtos.h"
#include "stdio.h"
#include "max31855.h"
#include <mpr121.h>

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);
DigitalOut motor(p22); // motor control

uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;
SPI thermoSPI(p5,p6,p7); // setup SPI interface
max31855 max1(thermoSPI, p20); //setup max31855 interface
Mutex lcd_mutex; // mutex to make the lcd lib thread safe
Semaphore four_slots(1); //Activate semaphore
DigitalOut toggle(p30); // toggle for Nichrome wire SSR
DigitalIn up(p19); // User pushbutton up controller
DigitalIn down(p18); // User pushbutton down button controller


int settemp = 85; // initial temperature set
float ftemperature = 0; // float variable for temperature
float ctemperature = 0; // float variable for temperature
int temptemp=0;

int key_code=0;


// Create the interrupt receiver object on pin 26
InterruptIn interrupt(p26);

// Setup the i2c bus on pins 28 and 27
I2C i2c(p28, p27);

// Setup the Mpr121:
// constructor(i2c object, i2c address of the mpr121)
Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);

// Thread 1: print the elapsed time on line 1 of the uLCD (i.e., HH:MM:SS)
void elapsedtime(void const *args)   //elapsed timer for when program starts
{
    int s = 00; //seconds
    int m = 00; //minutes
    int h = 00; //hours

    while(true) {
        s++;
        if(s>59) {
            s=00;
            m++;
        }
        if(m>59) {
            m=00;
            h++;
        }
        four_slots.wait(); // lock screen resource
        //lcd_mutex.lock();
        uLCD.color(0xFFFF00); //set text color
        uLCD.locate(0,0); //col,row location of text
        wait(0.1);
        uLCD.printf("Time    | %2d:%2d:%2d", h,m,s); // display time
        //lcd_mutex.unlock();
        four_slots.release(); //unlock screen resource
        Thread::wait(1000); // update once per secon
    }
}


// Thread 2: print the temperature from the thermocouple - MAX31855 device
void thermoread(void const *args)   //line 2
{
    while(true) {
        if (max1.ready()==1) {
            ctemperature = max1.read_temp(); //Get the reading
            ftemperature = (ctemperature)*(9.0/5.0)+32.0;
            four_slots.wait();
            uLCD.color(0xFFFF00);
            //uLCD.locate(0,2); //col,row
            //wait(0.1);
            // uLCD.printf("Current Temp. F");
            uLCD.locate(11,6); //col,row
            uLCD.printf("%4.2f", ftemperature);
            four_slots.release();
        }
    }
}


void fallInterrupt()
{
    int i=0;
    int value=mpr121.read(0x00);
    value +=mpr121.read(0x01)<<8;
    // LED demo mod
    i=0;
    // puts key number out to LEDs for demo
    for (i=0; i<12; i++) {
        if (((value>>i)&0x01)==1) key_code=i;
    }

    if(key_code== 10) {
        motor = 0;


    }
    if(key_code== 11) {
        motor = 1;
    }
}

int a =0;
int main()
{
    max1.initialise(); //initialize thermocouple IC
    uLCD.baudrate(3000000); //set LCD baudrate



    interrupt.fall(&fallInterrupt);
    interrupt.mode(PullUp);

    Thread t1(elapsedtime); //run elapsed time counter
    Thread t2(thermoread); //read and display temperature from thermocouple

    while(1) { //hystersis program
        key_code = 0;

        four_slots.wait();
        uLCD.color(0xFFFF00);
        uLCD.locate(0,5); //col,row
        uLCD.printf("Set     | ");
        uLCD.locate(0,6); //col,row
        uLCD.printf("Current | ");
        uLCD.locate(0,2); //col,row
        uLCD.printf("Motor   | ");
        four_slots.release();

        int place= 100;

        if(motor==0) {
            four_slots.wait();
            uLCD.color(0xFFFF00);
            uLCD.locate(11,2); //col,row
            uLCD.printf("OFF");
            four_slots.release();
        }
        if(motor==1) {
            four_slots.wait();
            uLCD.color(0xFFFF00);
            uLCD.locate(11,2); //col,row
            uLCD.printf("ON ");
            four_slots.release();
        }


        if(a<3) {
            //key_code = -1;
            if(key_code>=0 && key_code<=9) {
                temptemp+=place*key_code;
                place=place/10;
                four_slots.wait();
                uLCD.color(0xFFFF00);
                uLCD.locate(0,13); //col,row
                uLCD.printf("intermediate value");
                uLCD.locate(0,14); //col,row
                uLCD.printf("%3d",temptemp);
                four_slots.release();
                a++;
                wait(2);
            }
        }
        if(up == 1) {
            a = 0;
        }
        settemp=temptemp;
        temptemp=0;
        four_slots.wait();
        uLCD.color(0xFFFF00);
        uLCD.locate(11,5); //col,row
        uLCD.printf("%3d",settemp);
        four_slots.release();
        wait(2);



        if(ftemperature < settemp-1) { //condition for 1 degree under
            toggle=1; //turn on ssr for nichrome wire
            toggle=0;
        }
        // if(ftemperature > settemp-1){  //condition for 1 degree over
        //    toggle=0; //turn off ssr for nichrome wire
        // }
        // wait(.1); //check every 1 second
    }
}