File content as of revision 7:328dc986484f:

#include "mbed.h"
#include "N5110.h"
#include "BMP180.h"
#include "PowerControl/PowerControl.h"
#include "PowerControl/EthernetPowerControl.h"

BMP180 bmp180(p28,p27);   // SDA, SCL
N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
BusOut leds(LED4,LED3,LED2,LED1);
Serial serial(USBTX,USBRX);
InterruptIn button1(p16);
InterruptIn button2(p17);
InterruptIn button3 (p15);
InterruptIn button4 (p18);


Ticker timer; //Create ticker object for temperature and pressure readings
Timeout powerSaverTimeout; // create a timeout object for the poweerSaver function

int setTimeFlag = 0; // flag for real time clock ISR
int timerFlag = 0; // Flag for tempesrature pressure reading ISR
int button1Flag = 0;
int button2Flag = 0 ;
int button3Flag = 0 ;
int button4Flag = 0 ;
int unitFlag = 1 ;
int powerSaverFlag = 0 ;
int lcdPowerFlag = 1 ; // Indicates if the LCD is switched on or powered off
int dataLoggerFlag = 0 ;



int choice=1 ;
int length;
int year=2015;
int month=1;
int day=1;
int hour=12;
int min=0;
int sec=1;
int UNIXdate;
int powerSaverTime = 60;
int dataLoggerTime = 60;




char rxString[16]; //buffer to store recieved string from serial
char bufferTime[14]; // buffer to store time
char bufferDate[14]; //buffer to store date
char bufferT[14]; //buffer to store temperature
char bufferP[14];  //buffer to store pressure, each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
// so can display a string of a maximum 14 characters in length
// or create formatted strings - ensure they aren't more than 14 characters long
char Year[4];
char Month[12];
char Day[31];
char Hour[24];
char Min[60];
char PowerSaverTime[2]; // string to store the powerSaverTime value to display on the LCD
char DataLoggerTime[2]; // string to store the time used for the logger to read data


void button1Pressed()  //ISR to subtract 1 from the value of choice when the first button is pressed
{
    choice --;
    leds = 1;

}



void button2Pressed() //ISR to add 1 to the value of the choice when the second button is pressed
{
    choice ++;
    leds = 2 ;

}



void button3Pressed()
{
    button3Flag=1;
}



void button4Pressed()
{
    button4Flag = 1 ;
}





void serialISR()
{
    //reads rx string into buffer when a serial interrupt occurs
    serial.gets(rxString,16);
    //set flag
    setTimeFlag=1;
}



void setTime() // sets the time every second
{
//print time for debugging
    //serial.printf("set_time -%s ",rxString);
//atoi() converts a string to an integer
    int time = atoi(rxString);
//update the time
    set_time(time);
}



void updateTime()
{
    time_t seconds = time(NULL); // get current time
// format time into a string (time and date)
    strftime(bufferTime, 14 , "%I:%M", localtime(&seconds));
    strftime(bufferDate, 14 , "%d/%m/%y", localtime(&seconds));

    if (setTimeFlag) {
        setTimeFlag=0;
    }
}


void timerExpired() // ISR which sets the timer flag (flag used to display the buffers on LCD)
{
    timerFlag=1;
}



void readData() //Imports the data and saves them to the bufferss
{

    Measurement measurement;  // measurement structure declared in BMP180 class

    // read values (T in Celsius and P in mb) and print over serial port
    measurement = bmp180.readValues();
    // serial.printf("T = %.2f C P = %.2f mb\n",measurement.temperature,measurement.pressure);

    int temperatureC = measurement.temperature;
    int temperatureF = (temperatureC*(9/5))+32;

    if (unitFlag==1 || unitFlag==2 ) {
        length = sprintf(bufferT,"T = %0.1d C",temperatureC); // print formatted data to buffer
        // it is important the format specifier ensures the length will fit in the buffer
    }
    if (unitFlag==3 || unitFlag==4 ) {
        length = sprintf(bufferT,"T = %0.1d F",temperatureF); // print formatted data to buffer
        // it is important the format specifier ensures the length will fit in the buffer
    }

    float pressureMB = measurement.pressure;  // same idea with floats
    float pressureATM = pressureMB*0.0009869;


    if (unitFlag==1 || unitFlag==3 ) {
        length = sprintf(bufferP,"P = %.2f mb",pressureMB); // print formatted data to buffer
        // it is important the format specifier ensures the length will fit in the buffer
    }
    if (unitFlag==2 || unitFlag==4 ) {
        length = sprintf(bufferP,"P = %.2f atm",pressureATM); // print formatted data to buffer
        // it is important the format specifier ensures the length will fit in the buffer
    }


}




void displayData() //Prints the buffers on the LCD
{
    lcd.clear();
    if (length <= 14) { // if string will fit on display
        lcd.printString(bufferT,0,1);           // display on screen
        lcd.printString(bufferP,0,2);
        lcd.printString(bufferTime,0,3);
        lcd.printString(bufferDate,0,4);
    }
}







void savePower()   // turns off the LCD to save power
{

    lcd.turnOff () ; //turns off the lcd
    lcdPowerFlag = 0 ;  // A flag is set to indicate the state of the LCD

}







void powerSaverCheck()   // checks if the powersaverFlag is set
{

    if (powerSaverFlag == 1 ) {

        powerSaverTimeout.attach(&savePower, powerSaverTime); // setup a timeiut to call the savePower function

    }

    else {
        powerSaverTimeout.detach();

    }
}



void wakeUp ()  //Turns the LCD on after the mbed is interrupted
{

    if (button1Flag || button2Flag || button3Flag || button4Flag ) {


        if (lcdPowerFlag == 0) { // if the LCD is powered off
            lcdPowerFlag = 1 ;
            lcd.init();  // turns the LCD on
            powerSaverTimeout.attach(&savePower, powerSaverTime); // setup a timeiut to call the savePower function
            button1Flag = 0 ;
            button2Flag = 0 ;
            button3Flag = 0 ;
            button4Flag = 0 ;
        }
    }

}



void updateData() //
{
    while (1) {
        if (timerFlag) {
            timerFlag=0;
            readData();
            displayData();
        }
        if (button3Flag) {
            button3Flag = 0;
            break;
        }

        Sleep();
    }
}


void dataLoggerSetting()
{

    lcd.clear();
    choice = dataLoggerFlag ;
    powerSaverCheck();

    while (1) {
        wakeUp();
        int time = sprintf (DataLoggerTime, "%d min", dataLoggerTime/60);//convert integer to buffer str

        if (choice < 1) {
            choice = 2;
        }
        if (choice > 2) {
            choice = 1;
        }
        if (dataLoggerTime > 1800) {
            dataLoggerTime = 60 ;
        }


        switch (choice) {
            case 1:

                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Data Logger :",0,1);
                lcd.printString("ON",0,2);
                lcd.printString("Interval:",0,3);
                lcd.printString(DataLoggerTime,0,4);
                lcd.printString("Back      Save",0,5);

                if (button4Flag) {
                    button4Flag=0;
                    dataLoggerFlag = 1 ;
                    dataLoggerTime += 60 ;

                }


                break;
            case 2:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Data Logger : ",0,1);
                lcd.printString("OFF",0,2);
                lcd.printString("Back      Save",0,5);
                if (button4Flag) {
                    button4Flag=0;
                    dataLoggerFlag = 0 ;

                }

            default:
                break;

        }

        wait (0.1);
        if (button3Flag) {
            button3Flag=0;
            break;
        }
    }



}












void powerSaverSetting()
{


    lcd.clear();
    choice = powerSaverFlag ;

    while (1) {
        wakeUp();
        int time = sprintf (PowerSaverTime, "%d min", powerSaverTime/60);//convert integer to buffer str

        if (choice < 1) {
            choice = 2;
        }
        if (choice > 2) {
            choice = 1;
        }
        if (powerSaverTime > 300) {
            powerSaverTime = 60 ;
        }


        switch (choice) {
            case 1:

                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Power Saver :",0,1);
                lcd.printString("ON",0,2);
                lcd.printString("Time Out :",0,3);
                lcd.printString(PowerSaverTime,0,4);
                lcd.printString("Back      Save",0,5);

                if (button4Flag) {
                    button4Flag=0;
                    powerSaverFlag = 1 ;
                    powerSaverTime += 60 ;

                }


                break;
            case 2:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Power Saver : ",0,1);
                lcd.printString("OFF",0,2);
                lcd.printString("Back      Save",0,5);
                if (button4Flag) {
                    button4Flag=0;
                    powerSaverFlag = 0 ;

                }

            default:
                break;

        }

        wait (0.1);
        powerSaverCheck();
        if (button3Flag) {
            button3Flag=0;
            break;
        }
    }
}








void calculateUNIXTime()
{
    time_t rawtime;
    struct tm * timeinfo;

    /* get current timeinfo: */
    time ( &rawtime ); //or: rawtime = time(0);
    /* convert to struct: */
    timeinfo = localtime ( &rawtime );

    /* now modify the timeinfo to the given date: */
    timeinfo->tm_year   = year - 1900;
    timeinfo->tm_mon    = month - 1;    //months since January - [0,11]
    timeinfo->tm_mday   = day;          //day of the month - [1,31]
    timeinfo->tm_hour   = hour;         //hours since midnight - [0,23]
    timeinfo->tm_min    = min;          //minutes after the hour - [0,59]
    timeinfo->tm_sec    = sec;          //seconds after the minute - [0,59]

    /* call mktime: create unix time stamp from timeinfo struct */
    UNIXdate = mktime ( timeinfo );

}




void unitsSetting()
{
    choice = 1;
    powerSaverCheck();
    while (1) {
        wakeUp();


        if (choice < 1) {
            choice = 4;
        }
        if (choice > 4) {
            choice = 1;
        }



        switch (choice) {
            case 1:

                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Units : ",0,2);
                lcd.printString("C/mb",0,3);
                lcd.printString("Back      Save",0,5);

                if (button4Flag) {
                    button4Flag=0;
                    unitFlag=1;
                }


                break;
            case 2:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Units : ",0,2);
                lcd.printString("C/atm",0,3);
                lcd.printString("Back      Save",0,5);
                if (button4Flag) {
                    button4Flag=0;
                    unitFlag=2;
                }
                break;
            case 3:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Units : ",0,2);
                lcd.printString("F/mb",0,3);
                lcd.printString("Back      Save",0,5);
                if (button4Flag) {
                    button4Flag = 0;
                    unitFlag=3;
                }
                break;
            case 4:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Units : ",0,2);
                lcd.printString("F/atm",0,3);
                lcd.printString("Back      Save",0,5);
                if (button4Flag) {
                    button4Flag=0;
                    unitFlag=4;
                }
                break;
            default:
                break;

        }
        wait (0.1);
        if (button3Flag) {
            button3Flag=0;
            break;
        }
    }
}





void brightnessSetting ()
{
    lcd.clear();
    while(1) {
        wakeUp();
        lcd.clear();
        lcd.refresh();
        if (choice < 1) {
            choice = 6 ;
        }
        if (choice > 6) {
            choice = 1;
        }


        if (button4Flag) {
            button4Flag=0;
            lcd.setBrightness(choice/10);
        }

        if (button3Flag) {
            button3Flag=0;
            break;
        }
    }
}



void timeDateSetting()
{

    choice = 1 ;
    while (1) {
        wakeUp();
        if (choice > 6) {
            choice = 1 ;
        }
        if (choice < 1) {
            choice = 6 ;
        }


//convert integers to strings to display on the LCD
        int y = sprintf (Year, "Year : %d", year);//convert integer to buffer str
        int m = sprintf (Month, "Month : %d", month);//convert integer to buffer str
        int d = sprintf (Day, "Day : %d", day);//convert integer to buffer str
        int h = sprintf (Hour, "Hour : %d", hour);//convert integer to buffer str
        int mi = sprintf (Min, "Min : %d", min);//convert integer to buffer str


        switch (choice) {
            case 1:

                lcd.clear();
                lcd.printString(Hour,10,0);
                lcd.printString(Min,0,1);
                lcd.printString(Day,0,2);
                lcd.printString(Month,0,3);
                lcd.printString(Year,0,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(5,4,3,1);  // x,y,radius,black fill
                if (button3Flag) {
                    button3Flag= 0;
                    hour--;
                }
                if (button4Flag) {
                    button4Flag= 0;
                    hour++;
                }

                break;
            case 2:
                lcd.clear();
                lcd.printString(Hour,0,0);
                lcd.printString(Min,10,1);
                lcd.printString(Day,0,2);
                lcd.printString(Month,0,3);
                lcd.printString(Year,0,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(5,12,3,1);  // x,y,radius,black fill
                if (button3Flag) {
                    button3Flag= 0;
                    min--;
                }
                if (button4Flag) {
                    button4Flag= 0;
                    min++;
                }
                break;
            case 3:
                lcd.clear();
                lcd.printString(Hour,0,0);
                lcd.printString(Min,0,1);
                lcd.printString(Day,10,2);
                lcd.printString(Month,0,3);
                lcd.printString(Year,0,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(5,20,3,1);  // x,y,radius,black fill
                if (button3Flag) {
                    button3Flag= 0;
                    day--;
                }
                if (button4Flag) {
                    button4Flag= 0;
                    day++;
                }
                break;
            case 4:
                lcd.clear();
                lcd.printString(Hour,0,0);
                lcd.printString(Min,0,1);
                lcd.printString(Day,0,2);
                lcd.printString(Month,10,3);
                lcd.printString(Year,0,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(5,28,3,1);  // x,y,radius,black fill
                if (button3Flag) {
                    button3Flag= 0;
                    month--;
                }
                if (button4Flag) {
                    button4Flag= 0;
                    month++;
                }
                break;
            case 5:

                lcd.clear();
                lcd.printString(Hour,0,0);
                lcd.printString(Min,0,1);
                lcd.printString(Day,0,2);
                lcd.printString(Month,0,3);
                lcd.printString(Year,10,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(5,36,3,1);  // x,y,radius,black fill
                if (button3Flag) {
                    button3Flag= 0;
                    year--;
                }
                if (button4Flag) {
                    button4Flag= 0;
                    year++;
                }
                break;
            case 6:

                lcd.clear();
                lcd.printString(Hour,0,0);
                lcd.printString(Min,0,1);
                lcd.printString(Day,0,2);
                lcd.printString(Month,0,3);
                lcd.printString(Year,0,4);
                lcd.printString("Back      Save",0,5);
                lcd.drawCircle(40,44,3,1);  // x,y,radius,black fill
                if (button4Flag) {
                    button4Flag=0;
                    calculateUNIXTime();
                    set_time(UNIXdate); // initialise time from the calculated UNIX time entered by the user
                    serial.printf ("Until the given date, since 1970/01/01 %i seconds have passed.\n", UNIXdate);
                }
                if (button3Flag) {
                    button3Flag=0;
                    goto exit_loop;
                }
                break;
            default:
                break;
        }
        wait (0.1);
    }
exit_loop:
    ;
}




void settingsMenu()
{

    powerSaverCheck();

    choice = 1 ;
    while(1) {


        wakeUp();
        if (choice > 5) {
            choice = 1 ;
        }
        if (choice < 1) {
            choice = 5 ;
        }
        updateTime();
        switch (choice) {
            case 1:

                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Time/Date",10,1);
                lcd.printString("Units",0,2);
                lcd.printString("Brightness",0,3);
                lcd.printString("Power Saver",0,4);
                lcd.printString("Logger",0,5);
                lcd.drawCircle(5,12,3,1);  // x,y,radius,black fill

                if (button4Flag) {
                    button4Flag=0;
                    timeDateSetting();
                }


                break;
            case 2:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Time/Date",0,1);
                lcd.printString("Units",10,2);
                lcd.printString("Brightness",0,3);
                lcd.printString("Power Saver",0,4);
                lcd.printString("Logger",0,5);
                lcd.drawCircle(5,20,3,1);  // x,y,radius,black fill

                if (button4Flag) {
                    button4Flag=0;
                    unitsSetting();
                }

                break;
            case 3:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Time/Date",0,1);
                lcd.printString("Units",0,2);
                lcd.printString("Brightness",10,3);
                lcd.printString("Power Saver",0,4);
                lcd.printString("Logger",0,5);
                lcd.drawCircle(5,28,3,1);  // x,y,radius,black fill
                if (button4Flag) {
                    button4Flag = 0;
                    brightnessSetting();
                }
                break;
            case 4:
                lcd.clear();
                lcd.printString(bufferTime,48,0);
                lcd.printString("Time/Date",0,1);
                lcd.printString("Units",0,2);
                lcd.printString("Brightness",0,3);
                lcd.printString("Power Saver",10,4);
                lcd.printString("Logger",0,5);
                lcd.drawCircle(5,36,3,1);  // x,y,radius,black fill
                if (button4Flag) {
                    button4Flag = 0;
                    powerSaverSetting();
                }
                break;
            case 5:

                lcd.clear();

                lcd.printString(bufferTime,48,0);
                lcd.printString("Time/Date",0,1);
                lcd.printString("Units",0,2);
                lcd.printString("Brightness",0,3);
                lcd.printString("Power Saver",0,4);
                lcd.printString("Logger",10,5);
                lcd.drawCircle(5,44,3,1);  // x,y,radius,black fill
                if (button4Flag) {
                    button4Flag = 0;
                    dataLoggerSetting();
                }
                break;
            case 6:

                lcd.clear();
                choice = 1;
                break;
            default:
                leds = 15;
                break;
        }
        if (button3Flag) {
            button3Flag=0;
            break;
        }
        wait (0.1);
    }
}


void startMenu()   //The menu displayed at the beginning
{
    wakeUp();
    switch (choice) {
        case 1:

            lcd.clear();
            lcd.printString(bufferTime,48,0);
            lcd.printString("Live Data",20,1);
            lcd.printString("Saved Data",0,2);
            lcd.printString("Forecast",0,3);
            lcd.printString("Alarms",0,4);
            lcd.printString("Settings",0,5);
            lcd.drawCircle(5,12,3,1);  // x,y,radius,black fill
            if (button4Flag) {
                button4Flag=0;
                updateData();
            }

// rest of code here
            break;
        case 2:
            lcd.clear();
            lcd.printString(bufferTime,48,0);
            lcd.printString("Live Data",0,1);
            lcd.printString("Saved Data",20,2);
            lcd.printString("Forecast",0,3);
            lcd.printString("Alarms",0,4);
            lcd.printString("Settings",0,5);
            lcd.drawCircle(5,20,3,1);  // x,y,radius,black fill
// rest of code here
            break;
        case 3:
            lcd.clear();
            lcd.printString(bufferTime,48,0);
            lcd.printString("Live Data",0,1);
            lcd.printString("Saved Data",0,2);
            lcd.printString("Forecast",20,3);
            lcd.printString("Alarms",0,4);
            lcd.printString("Settings",0,5);
            lcd.drawCircle(5,28,3,1);  // x,y,radius,black fill
// rest of code here
            break;
        case 4:
            lcd.clear();
            lcd.printString(bufferTime,48,0);
            lcd.printString("Live Data",0,1);
            lcd.printString("Saved Data",0,2);
            lcd.printString("Forecast",0,3);
            lcd.printString("Alarms",20,4);
            lcd.printString("Settings",0,5);
            lcd.drawCircle(5,36,3,1);  // x,y,radius,black fill
            break;
        case 5:

            lcd.clear();
            lcd.printString(bufferTime,48,0);
            lcd.printString("Live Data",0,1);
            lcd.printString("Saved Data",0,2);
            lcd.printString("Forecast",0,3);
            lcd.printString("Alarms",0,4);
            lcd.printString("Settings",20,5);
            lcd.drawCircle(5,44,3,1);  // x,y,radius,black fill
            if (button4Flag) {
                button4Flag=0;
                settingsMenu();
            }
            break;
        case 6:

            lcd.clear();
            choice = 1;
            break;
        default:
            leds = 15;
            break;
    }
}





int main()
{

    // initiliase barometer
    bmp180.init();
    lcd.init();
    timer.attach(&timerExpired,1.0);
    serial.attach(&serialISR);
    button1.rise(&button1Pressed); // call ISR on rising edge (button1pressed)
    button2.rise(&button2Pressed); // call ISR on rising edge (button2pressed)
    button3.rise(&button3Pressed);
    button4.rise(&button4Pressed);

    set_time(UNIXdate); // initialise time from the calculated UNIX time entered by the user


    powerSaverCheck();

    while(1) {

        if (choice > 5) {
            choice = 1 ;
        }
        if (choice < 1) {
            choice = 5 ;
        }
        updateTime();
        startMenu();
        wait (0.1);
    }
}