Johannes Otto / Mbed 2 deprecated simple_stm_ignition

programmable ignition for an mz ts 150. The interruptor needs to be replaced by an hall effect sensor

Dependencies:   mbed

IgnitionModule.h@3:5efd78be4662, 2015-10-25 (annotated)

Committer:
johannes_otto
Date:
Sun Oct 25 16:58:59 2015 +0000
Revision:
3:5efd78be4662
Parent:
1:f99510926784 
constructor requires stroke now, it accepts mm values instead of degree (its easier and more accurate to measure). The angles are computed automatically

Who changed what in which revision?

UserRevisionLine numberNew contents of line
johannes_otto 3:5efd78be4662 1 #include "mbed.h"
johannes_otto 3:5efd78be4662 2
johannes_otto 3:5efd78be4662 3 static const float PI = 3.141592653589793238;
johannes_otto 3:5efd78be4662 4
johannes_otto 3:5efd78be4662 5 class IgnMod
johannes_otto 3:5efd78be4662 6 {
johannes_otto 3:5efd78be4662 7 private:
johannes_otto 3:5efd78be4662 8 Timeout ignition_timer;
johannes_otto 3:5efd78be4662 9 Timer t;
johannes_otto 3:5efd78be4662 10
johannes_otto 3:5efd78be4662 11 DigitalOut _pin;
johannes_otto 3:5efd78be4662 12
johannes_otto 3:5efd78be4662 13 int ignition_length;
johannes_otto 3:5efd78be4662 14 int round_time;
johannes_otto 3:5efd78be4662 15 int ignition_delay;
johannes_otto 3:5efd78be4662 16
johannes_otto 3:5efd78be4662 17 float offset;
johannes_otto 3:5efd78be4662 18 float def_ignition;
johannes_otto 3:5efd78be4662 19
johannes_otto 3:5efd78be4662 20 void on() {
johannes_otto 3:5efd78be4662 21 _pin.write(1);
johannes_otto 3:5efd78be4662 22 ignition_timer.attach_us(this,&IgnMod::off,ignition_length);
johannes_otto 3:5efd78be4662 23 }
johannes_otto 3:5efd78be4662 24 void off() {
johannes_otto 3:5efd78be4662 25 _pin.write(0);
johannes_otto 3:5efd78be4662 26 }
johannes_otto 3:5efd78be4662 27
johannes_otto 3:5efd78be4662 28 int get_delay(int round_time) {
johannes_otto 3:5efd78be4662 29 int delay=0;
johannes_otto 3:5efd78be4662 30 int rpm=60e6/round_time;
johannes_otto 3:5efd78be4662 31
johannes_otto 3:5efd78be4662 32 if (rpm>7000) delay=-4;
johannes_otto 3:5efd78be4662 33 else if (rpm>6000) delay=-4;
johannes_otto 3:5efd78be4662 34 else if (rpm>5000) delay=-4;
johannes_otto 3:5efd78be4662 35 else if (rpm>4000) delay=-4;
johannes_otto 3:5efd78be4662 36 else if (rpm>3000) delay=-2;
johannes_otto 3:5efd78be4662 37 else if (rpm>2000) delay=-2;
johannes_otto 3:5efd78be4662 38 else if (rpm>1000) delay=-2;
johannes_otto 3:5efd78be4662 39 else delay=-2;
johannes_otto 3:5efd78be4662 40
johannes_otto 3:5efd78be4662 41 return round_time*(offset-def_ignition+delay)/360;
johannes_otto 3:5efd78be4662 42 }
johannes_otto 3:5efd78be4662 43 public:
johannes_otto 3:5efd78be4662 44 IgnMod(PinName pin,int il,float of_mm, float di_mm, float h) : _pin(pin) {
johannes_otto 3:5efd78be4662 45 float r=h/2;
johannes_otto 3:5efd78be4662 46 ignition_length=il;
johannes_otto 3:5efd78be4662 47 offset=acos((r-of_mm)/r)*180/PI;
johannes_otto 3:5efd78be4662 48 def_ignition=acos((r-di_mm)/r)*180/PI;
johannes_otto 3:5efd78be4662 49 t.start();
johannes_otto 3:5efd78be4662 50 }
johannes_otto 3:5efd78be4662 51 void ignite() {
johannes_otto 3:5efd78be4662 52 round_time=t.read_us();
johannes_otto 3:5efd78be4662 53 t.reset();
johannes_otto 3:5efd78be4662 54 ignition_delay=get_delay(round_time);
johannes_otto 3:5efd78be4662 55 ignition_timer.attach_us(this,&IgnMod::on,ignition_delay-t.read_us());
johannes_otto 3:5efd78be4662 56 }
johannes_otto 3:5efd78be4662 57 };