File content as of revision 2:8e7b51353f32:

#include    "Servo.h"
#include    "BufferedSerial.h"

//#define SPEED_CONTROL_ENABLE    //  Includes engine revs servo control loop

const   uint32_t    TICKOVER_RPM = 2500;
const   uint32_t    PWM_OFF_RPM_LIMIT = (TICKOVER_RPM * 9) / 10;
const   uint32_t    MAX_RPM_LIMIT = 7500;
const   double      MAX_FIELD_PWM = 0.47;
const   double      SERVO_MAX = 0.5;
const   double      DRIVER_NEUTRAL = 0.18;
const   uint32_t    eeprom_page = 17;   //  Determines where in eeprom 'settings' reside

//const   int lut_seg_size    =   60; //  steps per thousand RPM
//const   int lut_size = lut_seg_size * 8;    //  8 segments - 0-1, 1-2, 2-3, 3-4 etc 000 rpm

class   VEXT_Data   {
    public:
    uint64_t    t_on, t_off, measured_pw_us, measured_period, rise_count, fall_count;
    double      duty_cycle  ()  {
        return  (double) measured_pw_us / (double) measured_period;
    }   ;
    VEXT_Data   ()  {   //  constructor
        t_on = t_off = measured_pw_us =  measured_period = rise_count = fall_count = 0L;
    }   ;
}   ;

class   eeprom_settings {
    char        settings    [36];
  public:
    eeprom_settings (); //  Constructor
    char        rd  (uint32_t)  ;           //  Read one setup char value from private buffer 'settings'
    bool        rd  (char *, uint32_t)  ;           //  Read one setup char value from private buffer 'settings'
    bool        wr  (char, uint32_t)  ;     //  Write one setup char value to private buffer 'settings'
    bool        save    ()  ;               //  Write 'settings' buffer to EEPROM
    bool        load    ()  ;               //  Get 'settings' from EEPROM
    bool        set_defaults    ();         //  Put default settings into EEPROM and local buffer
//    uint32_t    errs    ()  ;               //  Return errors
}   ;

enum    {RPM0, RPM1, RPM2, RPM3, RPM4, RPM5, RPM6, RPM7, RPM8, 
            PWM_SCALE, FUT1, FUT2, FUT3, FUT4, FUT5}  ;  //  

struct  optpar  {
    int min, max, def;  //  min, max, default
    const char * t;     //  description
}   ;

const   int MAX_PARAMS = 12;    //  Up from 10 May 2020
struct  parameters  {
    int32_t times[50];
    int32_t position_in_list, last_time, numof_dbls;
    double  dbl[MAX_PARAMS];
}   ;

const   int PWM_PERIOD_US = 1800    ;   //  Was 2400, May want to reduce this, note would require change of resistor value on board