File content as of revision 11:b538e73841ae:

#include "mbed.h"
#include "LCD.h"
#include "TextLCD.h"
#include "rtos.h"

using namespace std;
ENVDISPLAY::ENVDISPLAY(PinName rsPin, PinName rePin, PinName d4Pin, PinName d5Pin, PinName d6Pin, PinName d7Pin, PinName Button1Pin, PinName Button2Pin) : TextLCD(rsPin, rePin, d4Pin, d5Pin, d6Pin, d7Pin), Button1(Button1Pin), Button2(Button2Pin)
{
    //constructor
    _latestTemp = 0.0;
    _latestPres = 0.0;
    _latestLDR = 0.0;
    _latestTime = 0;
    _currentState = SCROLLREADINGS;
}
void ENVDISPLAY::SendMessage(char sentText[], bool returnToReadings)
{
    if (strlen(sentText)>32)
    {
        //overflow error
    } else {
        std::copy( sentText, sentText+strlen(sentText), _message ); //store  inputted message to _message
        _AutoQuit = returnToReadings;   //Set AutoQuitState
        _currentState = MESSAGE;    //Change LCD state to show message
    }
}

void ENVDISPLAY::UpdateData(float temp, float pres, float LDR, time_t sampleTime)
{
    _latestTemp = temp;
    _latestPres = pres;
    _latestLDR = LDR;
    _latestTime = sampleTime;
}

void ENVDISPLAY::StateMachine(void)
{
    while (true) {
        cls();
        switch (_currentState) {
            case SCROLLREADINGS:
                tm T = ReturnDateTimeStruct(_latestTime);   //Get a time structure
                printf("Temp: %5.1fC\n",_latestTemp);   //Print temperature
                printf("Pres: %5.1fmBar\n",_latestPres);//Print Pressure
                //while (Button2 == 0) {}; //Spin
                Thread::wait(SCREENDELAY_MS);   //Hold screen for specified time
                cls();  //Clear screen
                printf("LDR: %4.3f\n",_latestLDR);  //Print Light Level
                printf("%2d/%2d %2d:%2d:%2d\n",T.tm_mday,T.tm_mon,T.tm_hour,T.tm_min,T.tm_sec); //Print time DD/MM HH:mm:ss
                Thread::wait(SCREENDELAY_MS);   //Hold screen for specified time
                break;

            case MESSAGE:
                printf("%s\n",_message);    //Print custom message to display
                Thread::wait(SCREENDELAY_MS);//Hold screen for specified time
                if (_AutoQuit) {
                //If it has been specified to return to scroll readings:
                    _currentState = SCROLLREADINGS; //Change state
                    memset(_message, 0, 32*sizeof(char));    //Wipe message
                }
                //Else stay in message state.
                break;
                
            case ADJUSTTIME:
                printf("Adjust the time\n");
                while (Button2 == 0) {}; //Spin
                SendMessage("Time Set",true);
                Button1.rise(this, &ENVDISPLAY::Button1ISR);    //Reattach interrupt
                break;
        }
    }
}

void ENVDISPLAY::Start(void)
{
    LCDThread.start(this, &ENVDISPLAY::StateMachine);
    this->Button1.rise(this, &ENVDISPLAY::Button1ISR);
    SendMessage("Starting...",true);
}

void ENVDISPLAY::Button1ISR(void)
{
    _currentState = ADJUSTTIME;
    Button1.rise(NULL); //Detach IR
}