Matteo Terruzzi / ESC

ESC class used to controll standard Electronic Speed Controllers for brushless motors of RC models

Dependents:   MTQuadControl Base_Hybrid_V2 base_rekam_darurat_v1 Base_Hybrid_Latihan_Ok_Hajar_servo_pwm ... more

Simple ESC usage example

#include "mbed.h"
#include "esc.h" //include the ESC class


int main()
{
    ESC esc1(p26); //declare the ESC as connected to pin p26.
    float throttle_var = 0.5 //that means 50%.
        
    while(1)
    {
        //... update throttle_var ...
    
        esc1 = throttle_var; //memorize the throttle value (it doesn't send it to the ESC).
        
        //... do whatever you want - e.g. call esc1.setThrottle(throttle_var) again ...
        
        esc1(); //actually sets the throttle to the ESC.
        
        wait_ms(20);  //20ms is the default period of the ESC pwm; the ESC may not run faster.
    }
}

esc.cpp@1:735702ea5519, 2013-07-19 (annotated)

Committer:
MatteoT
Date:
Fri Jul 19 04:47:41 2013 +0000
Revision:
1:735702ea5519
Parent:
0:116260c66d88 
no inline keywords

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MatteoT 0:116260c66d88 1 #include "mbed.h"
MatteoT 0:116260c66d88 2 #include "esc.h"
MatteoT 0:116260c66d88 3
MatteoT 0:116260c66d88 4 ESC::ESC(const PinName pwmPinOut, const int period)
MatteoT 0:116260c66d88 5 : esc(pwmPinOut), period(period), throttle(1000)
MatteoT 0:116260c66d88 6 {
MatteoT 0:116260c66d88 7 esc.period_ms(period);
MatteoT 0:116260c66d88 8 esc.pulsewidth_us(throttle);
MatteoT 0:116260c66d88 9 }
MatteoT 0:116260c66d88 10
MatteoT 1:735702ea5519 11 bool ESC::setThrottle (const float t)
MatteoT 0:116260c66d88 12 {
MatteoT 0:116260c66d88 13 if (t >= 0.0 && t <= 1.0) { // qualify range, 0-1
MatteoT 0:116260c66d88 14 throttle = 1000.0*t + 1000; // map to range, 1-2 ms (1000-2000us)
MatteoT 0:116260c66d88 15 return true;
MatteoT 0:116260c66d88 16 }
MatteoT 0:116260c66d88 17 return false;
MatteoT 0:116260c66d88 18 }
MatteoT 1:735702ea5519 19 bool ESC::operator= (const float t){
MatteoT 0:116260c66d88 20 return this->setThrottle(t);
MatteoT 0:116260c66d88 21 }
MatteoT 0:116260c66d88 22
MatteoT 1:735702ea5519 23 float ESC::getThrottle () const{
MatteoT 0:116260c66d88 24 return throttle;
MatteoT 0:116260c66d88 25 }
MatteoT 1:735702ea5519 26 ESC::operator float () const{
MatteoT 0:116260c66d88 27 return this->getThrottle();
MatteoT 0:116260c66d88 28 }
MatteoT 0:116260c66d88 29
MatteoT 1:735702ea5519 30 void ESC::pulse ()
MatteoT 0:116260c66d88 31 {
MatteoT 0:116260c66d88 32 esc.pulsewidth_us(throttle);
MatteoT 0:116260c66d88 33 }
MatteoT 1:735702ea5519 34 void ESC::operator() ()
MatteoT 0:116260c66d88 35 {
MatteoT 0:116260c66d88 36 this->pulse();
MatteoT 0:116260c66d88 37 }