File content as of revision 12:03589f1d5c30:

#include "mbed.h"
#include "Sampling.h"
#include "SDCard.h"
#include "SDBlockDevice.h"
#include "FATFileSystem.h"
#include "LCD.h"

DigitalOut GreenLED(PB_11);
DigitalOut SDCardStatusLED(LED3);
InterruptIn SD_WP(PE_10);
InterruptIn UserButton(USER_BUTTON);
SDBlockDevice sd(PB_5, D12, D13, D10);

enum SDCardStates {INSERTED,REMOVED,DISMOUNTREQUEST};
bool SDCardPresent;
bool SDCardMounted;
unsigned short SDinternalIndex;

FILE* fp; //File pointer type
SDCardStates SDCurrentState;

Thread SDCardThread;
FATFileSystem fs;


void SDCardInit(void)
{
    SDCardThread.start(&SDCardCode);   //Start thread running
    SD_WP.rise(&SDCardRemovedISR);     //SD removed
    SD_WP.fall(&SDCardInsertedISR);    //SD inserted
    UserButton.fall(&SDCardButtonISR); //Button released

    if (SD_WP == 1) {
        SDCardPresent = false;
        SDCurrentState = REMOVED;
        SDCardMounted = false;
    } else {
        SDCardPresent = true;
        SDCurrentState = INSERTED;
        SDCardMounted = false;
    }
}


//-----------------------------------------------------------------//
//ISRs
void SDCardRemovedISR(void)
{
    SDCardPresent = false;
    SDCurrentState = REMOVED;
    SDCardThread.signal_set(1);
}

void SDCardInsertedISR(void)
{
    SDCardPresent = true;
    SDCurrentState = INSERTED;
    SDCardThread.signal_set(1);

}

void SDCardButtonISR(void)
{
    SDCurrentState = DISMOUNTREQUEST;
    SDCardThread.signal_set(1);
}
//-----------------------------------------------------------------//


void SDCardCode(void)
{

    //set bool state. if sd card is in or not. (if sd card is already in)
    if (SD_WP) {
        SDCurrentState = REMOVED;
    } else {
        SDCurrentState = INSERTED;
    }

    while(true) {
        Thread::signal_wait(1);    //Wait untill signal set

        if (SDCurrentState == REMOVED) {

            if (SDCardMounted) {
                //print error message file currupt
                lcd.SendMessage("SD CARD REMOVED!  FILE CORRUPT",true);
            }
            SDCardStatusLED = 0;
            GreenLED = 0;



        } else if (SDCurrentState == INSERTED) {

            Thread::wait(1000); //wait 1 seccond to allow the SD card to be pluged in.
            
            if ( sd.init() != 0) { //Initalises the SDCard and checks if it succeeded
                //SDInit failed. Reinsert the SDCard
            }

            //Create a filing system for SD Card
            FATFileSystem fs("sd", &sd);////////////////////////////////////////////////////moved to init. dont know if this works.

            //Open to WRITE
            fp = fopen("/sd/test.csv","w");
            if (fp == NULL) {
                lcd.SendMessage("CANNOT OPEN FILE/sd/test.csv",true);
                //error
            }
            SDCardMounted = true;
            
            Sampling(false);         //Stop sampling
            SDinternalIndex = currentIndex; //InternalIndex for incrementing out data
            TakeKeys(true); //Take keys

            for (short i = 0; i < BUFFERSIZE; i++) { //For loop of length buffersize
                tm T = ReturnDateTimeStruct(timeReadings[SDinternalIndex]);
                //InternalIndex was set as newest. We will now decrement to display oldest to newest
                fprintf(fp," %4d/%2d/%2d,%2d:%2d:%2d,%2.2f,%2.2f,%2.2f\n",T.tm_year,T.tm_mon,T.tm_mday,T.tm_hour,T.tm_min,T.tm_sec,tempReadings[SDinternalIndex],presReadings[SDinternalIndex],LDRReadings[SDinternalIndex]);
                SDinternalIndex = IndexDecrement(SDinternalIndex); //Decrement internal index
            }
            
            TakeKeys(false); //Return keys
            Sampling(true);  //Start sampling
            

            fclose(fp);
            SDCardStatusLED = 1;



        } else if (SDCurrentState == DISMOUNTREQUEST) {

            sd.deinit();
            SDCardMounted = false;
            lcd.SendMessage("REMOVE SD CARD",true);
            GreenLED = 1;

        }
    }
}