File content as of revision 0:2fd314d76f37:

#include "mbed.h"
#include "BMP180.h"
#include "N5110.h"

//    VCC,SCE,RST,D/C,MOSI,SCLK,LED
N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
// Can also power (VCC) directly from VOUT (3.3 V) -
// Can give better performance due to current limitation from GPIO pin

BMP180 bmp180(p28,p27);   // SDA, SCL
Serial serial(USBTX,USBRX);

AnalogIn BUT1(p15);
AnalogIn BUT2(p16);
AnalogIn POT(p20);

int nx=84;
int ny=48;
int i,j;

void clearCells();

void readTemp(){
    while(1){
        Measurement measurement;
        clearCells();
        char buffer1[14];
        measurement = bmp180.readValues();
        int length=sprintf(buffer1,"T = %.2f C",measurement.temperature);
        if (length<=14){
            lcd.printString(buffer1,10,2);
        }
        wait(2.0);
    }
}

void readPress(){
    while(1){
        Measurement measurement;
        clearCells();
        char buffer2[14];
        measurement = bmp180.readValues();
        int length=sprintf(buffer2,"P = %.2f mb",measurement.pressure);
        if (length<=14){
            lcd.printString(buffer2,0,2);
        }
        wait(2.0);
    }
}

void menu()
{
    while(1) {
        lcd.normalMode(); //normal LCD colour mode
        lcd.setBrightness(0.5); //LCD backlight set to 50% brightness
        if (POT>(2.0/3.0)) {
            clearCells();
            lcd.printString("Temperature",10,1);
            lcd.printString(">",80,2);
            lcd.printString("Graph",0,5);
            lcd.printString("Current",43,5);
            if (BUT1>0.9) { //left button takes the user to the graph option
                clearCells();
                //tempGraph();
            }
            if (BUT2>0.9) { //right button takes the user to the current reading
                clearCells();
                readTemp();
            }
        }
        if ((POT>1.0/3.0)&&(POT<2.0/3.0)) {
            clearCells();
            lcd.printString("Pressure",20,1);
            lcd.printString("<",0,2);
            lcd.printString(">",80,2);
            lcd.printString("Graph",0,5);
            lcd.printString("Current",43,5);
            if (BUT1>0.9) {
                clearCells();
                //pressGraph();
            }
            if (BUT2>0.9) {
                clearCells();
                readPress();
            }
        }
        if (POT<(1.0/3.0)) {
            clearCells();
            lcd.printString("Light",30,1);
            lcd.printString("<",0,2);
            lcd.printString("Graph",0,5);
            lcd.printString("Current",43,5);
            if (BUT1>0.9) {
                clearCells();
                //lightGraph();
            }
            if (BUT2>0.9) {
                clearCells(); 
                //readLight();
            }
        }
    }
}

void clearCells ()
{
    //loop through cells and clear
    for (int i=0; i<nx; i++) {
        for (int j=0; j<ny; j++) {
            lcd.clearPixel(i,j);
        }
    }
    lcd.refresh (); //must refresh to write buffer to display
}

int main()
{
 lcd.init();
 bmp180.init();
 menu();
}