main.cpp

00001 #include "mbed.h"
00002 #include "TextLCD.h"
00003 #include "Counter.h"
00004 #include "LIS302.h"
00005 #include "Servo.h"
00006 #include "MSCFileSystem.h"
00007 
00008 Servo myservo(p21);
00009 LIS302 acc (p5,p6,p7,p8);
00010 DigitalIn on(p20);
00011 DigitalOut LIS302(LIS302);
00012 DigitalOut led1(LED1);
00013 DigitalOut led2(LED2);
00014 DigitalOut led3(LED3);
00015 DigitalOut led4(LED4);
00016 #define TICK_PERIOD 0.5
00017 MSCFileSystem fs("fs");
00018 Counter counter(p18);
00019 
00020 
00021 Ticker tick;
00022 
00023 Timer timer;
00024 volatile int tick_active = 0;
00025 
00026 void dotick (void) {
00027     tick_active = 1;
00028 
00029 }
00030 float samples [2] = {0};
00031 int index2 = 0;
00032 int start = 1;
00033 
00034 char FileName[20]; // this is where we store the file name
00035 
00036 int rpm_counter=0;
00037 int main() {
00038 
00039     float samples [1] = {0};
00040     int index = 0;
00041     int flipped_right = 1;
00042     int flipped_left = 1;
00043 
00044  
00045     // read the current time, and con convert it to a DD/MM/YYYY HH:MM:SS structure
00046     time_t seconds = time(NULL);
00047     struct tm *t = localtime(&seconds);
00048 
00049     // use the time to make a new file name
00050     // file name is /fs/ddmmHHMM.csv
00051     // Note we have to add one to the month as it is represented as 0-11 rather than 1-12 :-(
00052     sprintf(FileName,"/fs/%02d%02d%02d%02d.csv",t->tm_mday,1+(t->tm_mon),t->tm_hour,t->tm_min);
00053     FILE *fp = fopen(FileName,"w");
00054 
00055 
00056 
00057     fprintf(fp, "RPM,X,Y,Z\n");//this part prints the columns headers
00058 
00059     fclose(fp);
00060 
00061     tick.attach(dotick,0.5);
00062 
00063     while (1) {
00064         while (tick_active == 0) {}
00065         rpm_counter = counter.read();
00066         counter.reset();
00067 
00068         tick_active = 0;
00069         samples[index2] = 120*rpm_counter;
00070         index2++;
00071         if (index2 >= 2) {
00072             index2 = 0;
00073         }
00074         int i;
00075         start = 1;
00076         for (i=0; i<2; i++) {
00077             if (samples[i] <60) {
00078                 start = 0;
00079             }
00080         }
00081         if (on) {
00082             led2 = 1;
00083         }
00084         if (!on) {
00085             led2 = 0;
00086         }
00087         if (start) {
00088             led3 = 1;
00089         }
00090         if (!start) {
00091             led3 = 0;   // the leds are only to check the program is doing what i want it to!
00092         }
00093 
00094         if (start&&on)
00095             FILE *fp = fopen(FileName,"a");
00096         timer.start ();
00097         while (start&&on) {       //if the light gate reads over 60RPM and the swich is on then it will enter this loop
00098 
00099             while (tick_active == 0) {}
00100 
00101             rpm_counter = counter.read();
00102             counter.reset();
00103 
00104 
00105             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
00106             led1 = !led1;
00107             tick_active = 0;
00108 
00109 
00110             samples[index] = acc.y();
00111             index++;
00112             if (index >= 1) {
00113                 index = 0;
00114             }
00115             int i;
00116 
00117             flipped_right = 1;
00118             flipped_left =1;
00119 
00120             for (i=0; i<1; i++) {
00121                 if (samples[i] >= -0.8) {
00122                     flipped_left = 0;
00123                 }
00124 
00125                 if (samples[i] <= 0.8) {
00126                     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
00127 
00128 
00129 
00130 
00131                 }
00132 
00133                 if (flipped_left||flipped_right||!on) {
00134                     // 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
00135 
00136 
00137                     myservo = 1; // 1. the servo will turn to turn off the engine
00138 
00139                     timer.stop();  // 2. the timer will stop
00140 
00141                     fprintf(fp,"this run lasted %f seconds \n", timer.read()); // 3. the timer time will be printed to the file
00142                     fprintf(fp,"off,off,off,off");
00143                     fclose(fp); // and last the file will be closed
00144                     led1 = 0;
00145                     led4 = 1;
00146                 }
00147             }
00148         }
00149     }
00150 }