/*#############################################################

Program Name    : ex4_F446RE_SDCardLoggerRead
Author          : Grant Phillips
Date Modified   : 19/09/2016
Compiler        : ARMmbed
Tested On       : NUCLEO-F446RE

Description     : Example program that demonstrates the use of
                  a SDCard with the NUCLEO board.  The file that 
                  was created in ex3_F446RE_SDCardLoggerWrite
                  is openend and read line by line. 

Requirements    : * NUCLEO-F446RE Board
              
Circuit         : * The SDCard connected as:
                    
                    VCC         -       +3V or +5V (depending on module)
                    GND         -       GND
                    SS/CS       -       PB_6
                    MOSI        -       PB_5 (SPI3_MOSI)
                    MISO        -       PB_4 (SPI3_MISO)
                    SCK         -       PB_3 (SPI3_SCK)
                    
##############################################################*/

#include "mbed.h"
#include "SDFileSystem.h"           //Niel Thiessen's library

Serial pc(SERIAL_TX, SERIAL_RX);    //to use the PC as a console (display output)
 
DigitalOut myled(LED1);             //LED to indicate system operation
 
SDFileSystem sd(PB_5, PB_4, PB_3, PB_6, "sd"); //create a SDFileSystem object
//              mosi, miso, sck , cs  , name

int main()
{      
    int temp;
    char date[32];      //string for storing the date read
    char timeofday[32]; //string for storing the time read
    
    pc.printf("ex4_F446RE_SDCardLoggerRead\n\n");
    
    printf("Reading from SD card...\n");
        
    FILE *fp = fopen("/sd/log.txt", "r");           //open a file for reading ("r")
    
    if(fp == NULL) {                                //if error opening
        printf("Could not open file for reading!\n");
    }
    else {
        pc.printf("The contents of the file is:\n");
        while(fscanf(fp, "%s %s %d", date, timeofday, &temp) != EOF) {  //read the date string, time string, and analog integer value 
                                                                        //from the next line the file and repeat until the EOF
            pc.printf("%s %s:  %d\n", date, timeofday, temp);
        }
        fclose(fp);                                 //close the file
    }
    
    while(1) {      
        myled = !myled;                             //flash led
        wait(0.1);
    }
}