main.cpp

00001 #include "mbed.h"
00002 #include "stdio.h"
00003 #include "sms.h"                //custom sms library
00004 #include "SecurityMechanism.h"  //custom security mechanism library
00005 #include "MODSERIAL.h"          //buffer library for serial
00006 #include "GPS.h"                //GPS library
00007 #include "ADXL345.h"            //Sparkfun ADXL345 accelerometer library
00008 
00009 // System
00010 DigitalOut pulse(LED1); //heartbeat
00011 Serial pc(USBTX,USBRX); //for debugging
00012 
00013 // Peripherals
00014 MODSERIAL gsm(p28,p27);
00015 GPS gps(NC, p10);
00016 ADXL345 accelerometer(p5, p6, p7, p8);
00017 
00018 // Power Control
00019 DigitalOut gps_on(p22);
00020 DigitalOut gps_xstandby(p21);
00021 DigitalOut accelerometer_on(p20);
00022 //DigitalIn security_pwrd(p17);
00023 AnalogIn voltage_level(p19);
00024 
00025 // Global Vars
00026 int accel_reading[3] = {0, 0, 0};   //x, y, z coordinates of accelerometer
00027 int prev_accel_reading[3] = {0, 0, 0};   //x, y, z coordinates of accelerometer
00028 string phoneNumber = "4047849578";
00029 bool security_enabled = true;
00030 bool movement_detected = false;
00031 bool command_sent = false;
00032 #define ACCEL_THRESH 50
00033 
00034 int main() {
00035     pc.printf("Initializing Program.\r\n");
00036     //****init GSM    
00037     GSM_init();
00038     
00039     //****init GPS
00040     pc.printf("Initializing GPS.\r\n");
00041     GPS_Time t;
00042     gps.baud(4800);
00043     
00044     //****init accelerometer
00045     accelerometer_on = 1;
00046     pc.printf("Initializing Accelerometer.\r\n");
00047     //Go into standby mode to configure the device.
00048     accelerometer.setPowerControl(0x00);
00049 
00050     //Full resolution, +/-16g, 4mg/LSB.
00051     accelerometer.setDataFormatControl(0x0B);
00052     
00053     //3.2kHz data rate.
00054     accelerometer.setDataRate(ADXL345_3200HZ);
00055 
00056     //Measurement mode.
00057     accelerometer.setPowerControl(0x08);
00058     
00059     pc.printf("Initializing Complete.\r\n");
00060     
00061     wait(0.4);
00062 
00063     while(1) {
00064         accelerometer.getOutput(accel_reading);
00065         //check for movement
00066         for (int i = 0; i < 3; i++) {
00067             if (((int16_t)prev_accel_reading[i] != 0) && (int16_t)abs(accel_reading[i] - prev_accel_reading[i]) > ACCEL_THRESH) {
00068                 pc.printf("Movement detected\r\n");
00069                 movement_detected = true;
00070             }
00071             prev_accel_reading[i] = accel_reading[i];
00072         }
00073         
00074         //pc.printf("Seurity system = %d\r\n", security_pwrd);
00075         //security_enabled = security_pwrd;
00076         
00077         if (movement_detected) {
00078             if (security_enabled) {
00079                 //turn off accelerometer
00080                 accelerometer_on = 0;
00081                 pc.printf("Alert\r\n");
00082                 send_location();
00083                 wait(30);
00084             }
00085         }
00086         
00087         if (command_sent) {
00088             pc.printf("Ping.\r\n");
00089             send_location();
00090             command_sent = false;
00091             gps_on = 0;
00092             gps_xstandby = 0;
00093         }
00094         
00095         //heartbeat
00096         pulse = 1;
00097         wait(0.2);
00098         pulse = 0;
00099         wait(0.2);
00100     }
00101 }