File content as of revision 2:a079de4fd5b9:

#include "mbed.h"
#include "TextLCD.h"
#include "Counter.h"
#include "LIS302.h"
#include "Servo.h"
#include "MSCFileSystem.h"

Servo myservo(p21);
LIS302 acc (p5,p6,p7,p8);
DigitalIn on(p20);
DigitalOut LIS302(LIS302);
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);
#define TICK_PERIOD 0.5
MSCFileSystem fs("fs");
Counter counter(p18);


Ticker tick;

Timer timer;
volatile int tick_active = 0;

void dotick (void) {
    tick_active = 1;

}
float samples [2] = {0};
int index2 = 0;
int start = 1;

char FileName[20]; // this is where we store the file name

int rpm_counter=0;
int main() {

    float samples [1] = {0};
    int index = 0;
    int flipped_right = 1;
    int flipped_left = 1;

 
    // read the current time, and con convert it to a DD/MM/YYYY HH:MM:SS structure
    time_t seconds = time(NULL);
    struct tm *t = localtime(&seconds);

    // use the time to make a new file name
    // file name is /fs/ddmmHHMM.csv
    // Note we have to add one to the month as it is represented as 0-11 rather than 1-12 :-(
    sprintf(FileName,"/fs/%02d%02d%02d%02d.csv",t->tm_mday,1+(t->tm_mon),t->tm_hour,t->tm_min);
    FILE *fp = fopen(FileName,"w");



    fprintf(fp, "RPM,X,Y,Z\n");//this part prints the columns headers

    fclose(fp);

    tick.attach(dotick,0.5);

    while (1) {
        while (tick_active == 0) {}
        rpm_counter = counter.read();
        counter.reset();

        tick_active = 0;
        samples[index2] = 120*rpm_counter;
        index2++;
        if (index2 >= 2) {
            index2 = 0;
        }
        int i;
        start = 1;
        for (i=0; i<2; i++) {
            if (samples[i] <60) {
                start = 0;
            }
        }
        if (on) {
            led2 = 1;
        }
        if (!on) {
            led2 = 0;
        }
        if (start) {
            led3 = 1;
        }
        if (!start) {
            led3 = 0;   // the leds are only to check the program is doing what i want it to!
        }

        if (start&&on)
            FILE *fp = fopen(FileName,"a");
        timer.start ();
        while (start&&on) {       //if the light gate reads over 60RPM and the swich is on then it will enter this loop

            while (tick_active == 0) {}

            rpm_counter = counter.read();
            counter.reset();


            fprintf(fp,"%d,%.2f,%.2f,%.2f\n",60*rpm_counter,acc.x(),acc.y(),acc.z());  //the data colected is saved in the file that was opend
            led1 = !led1;
            tick_active = 0;


            samples[index] = acc.y();
            index++;
            if (index >= 1) {
                index = 0;
            }
            int i;

            flipped_right = 1;
            flipped_left =1;

            for (i=0; i<1; i++) {
                if (samples[i] >= -0.8) {
                    flipped_left = 0;
                }

                if (samples[i] <= 0.8) {
                    flipped_right = 0;         //the bit abouve is an array that is looking to see if the accelerometer is reading between 0.8 and -0.8




                }

                if (flipped_left||flipped_right||!on) {
                    // if the accelerometer is not reading between 0.8 and -0.8 on the y.acc or the swich is off the following will happen


                    myservo = 1; // 1. the servo will turn to turn off the engine

                    timer.stop();  // 2. the timer will stop

                    fprintf(fp,"this run lasted %f seconds \n", timer.read()); // 3. the timer time will be printed to the file
                    fprintf(fp,"off,off,off,off");
                    fclose(fp); // and last the file will be closed
                    led1 = 0;
                    led4 = 1;
                }
            }
        }
    }
}