File content as of revision 19:c78d3e8353c4:

//OCE 360 Final Project
//Annaliese Nardi, Eliza Taylor, Mackenzie Fraser, Megan Gimple
//Updated Code by Stephen Licht
//Description:

#include "mbed.h"
#include "MMA8452Q.h"  //accelerometer library
#include "MS5837.h"     //pressure sensor library***
#include "SCI_SENSOR.h"     //science sensor library, photocell, temperature cell
#include "SDFileSystem.h"   // SD card library

DigitalOut led1(LED1);
DigitalOut led2(LED2);

Serial pc(USBTX, USBRX);        //initial serial
Serial BLE(p13,p14);            //Bluetooth
MMA8452Q accel(p28,p27,0x1D);   //initial accelerometer
LM19 temp(p19);                 //temperature sensor
PhotoCell light(p20);           //photocell
MS5837 p_sensor(p9, p10, ms5837_addr_no_CS);  //pressure sensor
PwmOut thruster(p21);  //set PWM pin    //max 1.3ms min 1.1ms
PwmOut thruster2(p22); //set PWM pin
SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board

//global ticker
Ticker log_ticker;
Ticker accel_ticker;

// global timer
Timer t;
Timer t2; //part two timer

///File
FILE *fp;
char fname[100];
float PI = 3.14159265358979323846f;

//float operation parameters
float target_depth=0;       //global target depth default 0
int yo_num=0;               //global yo_num default 0
float thrust_on_time=0;     //global thrust_on time default 0
float accelData[3];         //global accel data
float vessel_lenth=1;

//functions
void welcome();
void log_data();

//IMU related
void accel_update(); //update accelerometer related variables. we use imu_ticker to call this function

//Control Parameters
float tim =5;           //define thruster on time
float percent = 1.5;    //user defined percent of thrust power

//Control related functions
void thrust_on(float pw, float on_time);  //input is pulse width
//void thrust_off(float pw, float on_time); // turn off pulse width


//global variables


//-------------Main functions-----------------------------------------------------------------------------------------
int main()
{
//-----Initialization realted code-------//
    //inital set the thruster esc to 1ms duty cycle
    thruster.period(0.002);      // 2 ms period
    thruster.pulsewidth(1.0/1000.000);

    //Initialize accelerometer:
    accel.init();
    led1=1;

    //initialize pressure sensor
    pc.printf("setting the pressure sensor\r\n");
    p_sensor.MS5837Reset();
    p_sensor.MS5837Init();
    pc.printf("setting the tickers\r\n");
    t.start();
    led2=1;
    welcome();

    //-----setup ticker-------//
    //setup ticker to separate log and IMU data update.
    //so we could have all our control code in the while loop
    //   //log at 2 Hz
    accel_ticker.attach(&accel_update,0.1);  //10Hz
    log_ticker.attach(&log_data,0.5);
    wait(1);

    //Part One
    int count=0;
    while(1)
    {
      count=count+1;
      float pw= percent;
      float on_time =tim;
      thrust_on(pw, on_time); //turn thruster on for 5 seconds
      wait(10);
      if count==3{
        return 0;
        }
    }

    //Part Two
    t2.start();
    while(1) {
        
        float current_depth=p_sensor.depth();
        float pw=percent;
        float on_time=3;

        if (current_depth-vessel_length<2) {
            thrust_on(pw,on_time);
        }
        if t2.read()>60{ //60 because counting in seconds?
            return 0;
        }
    }

    /*Part Three
    while(1) {
        error_deep = 2.5;    //deep end of error band 2.5m ?
        error_shallow = 1.5; //shallow end of error band 1.5m?

        if (current_depth <= error_shallow) { //if float is less than 1.5meters deep
            thrust_on(pw,on_time);               // turn on thruster at set pw and ontime
            else if (current_depth >= error_deep) //if float is more than 2.5 meters deep
                wait(1);                          // do nothing for 1 sec.. float will go up for 1 sec
                else 
                    pw = ; //very low thruster percentage
                    thrust_on(pw,on_time); //run thruster at very low percentage to maintain depth      
        }
    */

//-------------Customized functions---------------------------------------------//----------------------------------------
///-----------Welcome menu---------------------///
        void welcome() {
            char buffer[100]= {0};
            int flag=1;
            //Flush the port
            while(BLE.readable()) {
                BLE.getc();
            }
            while(flag) {
                BLE.printf("### I am alive\r\n");
                BLE.printf("### Please enter the log file name you want\r\n");
                if(BLE.readable()) {
                    BLE.scanf("%s",buffer);
                    sprintf(fname,"/sd/mydir/%s.txt",buffer); //make file name

                    flag = 0; //set the flag to 0 to break the while
                }
                wait(1);
            }
            //print name
            BLE.printf("### name received\r\n");
            BLE.printf("### file name and directory is: \r\n %s\r\n",fname); //file name and location
            //open file test
            mkdir("/sd/mydir",0777); //keep 0777, this is magic #
            fp = fopen(fname, "a");
            if(fp == NULL) {
                BLE.printf("Could not open file for write\n");
            } else {
                BLE.printf("##file open good \n"); //open file and tell if open
                fprintf(fp, "Hello\r\n");
                fclose(fp);
            }

            BLE.printf("### The main program will start in 5 seconds\r\n");
            wait(5);
        }

///-----------log functions---------------------///
        void log_data() {
            p_sensor.Barometer_MS5837();
            float current_time=t.read();
            float current_pressure=p_sensor.MS5837_Pressure();
            float current_depth=p_sensor.depth();
            float current_pw=percent;
            float current_Xaccel=accelData[0];
            float current_Yaccel=accelData[1];
            float current_Zaccel=accelData[2];
            float current_temp=temp.temp();
            float current_light=light.light();

            fprintf(fp, "$DATA, %f, %f, %f, %f, %f, %f, %f, %f, %f\r\n", current_time,current_pressure,current_depth,current_Xaccel,current_Yaccel,current_Zaccel,current_temp,current_light,current_pw);

            // log system time t.read()
            // log imu data, log science data
            // log pulse width
            // log pressure sensor data.
            // science sensor: temp.temp(), light.light()
            // IMU sensor

        }

///-----------acceleromter related functions---------------------///
        void accel_update() {
            accelData[0] = accel.readX();
            accelData[1] = accel.readY();
            accelData[2] = accel.readZ();
        }

///-----------Control related functions---------------------///
////Thruster on control, pw->pulse width in milli-second//
////                        pw range between 1 to 1.5//
////                       on_time-> thruster on time.
        void thrust_on(float pw, float on_time) { //input is pulse width

            float pw_max=2.0;
            if(pw>pw_max) {
                pw=pw_max; //hard limitation
            }
            Timer tt;
            tt.reset();
            tt.start();
            // lets set the pulse width
            //thruster.period(20.0/1000.00);      // 20 ms period
            thruster.pulsewidth(pw/1000.00);
            thruster2.pulsewidth(pw/1000.00);
            //PWM will be kept until time out
            while(tt.read()<=on_time) {

                pc.printf("thruster on?...mack is cool\r\n"); //print check
            }
            //stop the timer
            tt.stop();
            //turn off the thruster
            thruster.pulsewidth(1.0/1000.00);
            thruster2.pulsewidth(1.0/1000.00);

        }

///void thrust_off(float pw, float on_time)  //input is pulse width
//