File content as of revision 8:1db15ab871a4:

#include "mbed.h"
#include "uLCD_4DGL.h"
#include "rtos.h"
#include "stdio.h"
#include "max31855.h"
#include <mpr121.h>
#include "Stopwatch.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=85;

int key_code=-1;
int a =0;
int place= 100;

int s = 00;
int m = 00;
int h = 00;

Stopwatch watch = Stopwatch();

// 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
{
    watch.start();
}


// 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;
        }
    }
}


// Thread 3: reset temp
void thermoset(void const *args)   //line 2
{
    while(true) {
        if(up == 1) {
             a = 0;
             temptemp=0;
             while(a<3) {
                 if(key_code>=0 && key_code<=9) {
                     wait(.1);
                     if(a==0)temptemp=key_code*100;
                     if(a==1)temptemp+=key_code*10;
                     if(a==2)temptemp+=key_code*1;
                     a++;
                     key_code = -1;
                 }
             }
             settemp=temptemp;
        }
    }
}


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 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
    Thread t3(thermoset); // user set temperature

    while(1) { //hystersis program
        char* time = watch.getTime();
        four_slots.wait(); //lock screen
        uLCD.color(0xFFFF00); //set color

        uLCD.locate(0,0); //col,row for time
        uLCD.printf("Time    | %s",time);//%2d:%2d:%2d", h,m,s); // display time

        uLCD.locate(0,5);
        uLCD.printf("Set     | %3d",settemp); // current set temperature

        uLCD.locate(0,6);
        uLCD.printf("Current | %4.2f", ftemperature); // temperature reading

        uLCD.locate(0,2);
        uLCD.printf("Motor   | "); //motor state in "on" or "off" state

        uLCD.locate(0,13);
        uLCD.printf("New Temp| %3d",temptemp); //new user temperature

        /*if(a==0){
             uLCD.locate(11,13);
            uLCD.printf("%d",temptemp); //new user temperature
        }

        if(a==1){
             uLCD.locate(11,13);
            uLCD.printf("%d",temptemp); //new user temperature
        }

        if(a==2){
             uLCD.locate(11,13);
            uLCD.printf("%d",temptemp); //new user temperature
        }*/

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

        four_slots.release(); // release screen resource

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