Joseph Bradshaw / MotCon2

Simple DC motor control commands for driving DC motor conroller with PWM and up to 2 direction signals (complementary). Takes float value from -1.0 to 1.0.

Dependents:   Teensy_Mot_QEI_Ser_20180111 Axis Axis_20181108 Axis_version2

Fork of MotCon by Joseph Bradshaw

Overloaded class that takes a pwm motor control pin and one or two direction pins for driving DC motors with a variety of motor control IC's. Tested examples include the LM298, TD340, MC33926, A3949.

MotCon.cpp@1:69e79f1db999, 2016-05-19 (annotated)

Committer:
jebradshaw
Date:
Thu May 19 12:36:45 2016 +0000
Revision:
1:69e79f1db999
Parent:
0:3ba12980833b
Child:
2:23cd902e1774
Child:
5:3e07f69d8abd
Added overloaded mot_control function for reversing the motor direction in software.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jebradshaw 0:3ba12980833b 1 #include "MotCon.h"
jebradshaw 0:3ba12980833b 2
jebradshaw 0:3ba12980833b 3 //Constructor
jebradshaw 0:3ba12980833b 4 MotCon::MotCon(PinName pwm, PinName dir) : _pwm(pwm), _dir(dir) {
jebradshaw 0:3ba12980833b 5 _pwm.period_us(50);
jebradshaw 0:3ba12980833b 6 _pwm = 0.0;
jebradshaw 0:3ba12980833b 7 _dir = 0;
jebradshaw 0:3ba12980833b 8 }
jebradshaw 0:3ba12980833b 9
jebradshaw 0:3ba12980833b 10 // dc is signed duty cycle (+/-1.0)
jebradshaw 0:3ba12980833b 11 void MotCon::mot_control(float dc){
jebradshaw 0:3ba12980833b 12 if(dc>1.0)
jebradshaw 0:3ba12980833b 13 dc=1.0;
jebradshaw 0:3ba12980833b 14 if(dc<-1.0)
jebradshaw 0:3ba12980833b 15 dc=-1.0;
jebradshaw 0:3ba12980833b 16
jebradshaw 0:3ba12980833b 17 if(dc > 0.001){
jebradshaw 0:3ba12980833b 18 _dir = 0;
jebradshaw 0:3ba12980833b 19 _pwm = dc;
jebradshaw 0:3ba12980833b 20 }
jebradshaw 0:3ba12980833b 21 else if(dc < -0.001){
jebradshaw 0:3ba12980833b 22 _dir = 1;
jebradshaw 0:3ba12980833b 23 _pwm = abs(dc);
jebradshaw 0:3ba12980833b 24 }
jebradshaw 0:3ba12980833b 25 else{
jebradshaw 0:3ba12980833b 26 _dir = 0;
jebradshaw 0:3ba12980833b 27 _pwm = 0.0;
jebradshaw 0:3ba12980833b 28 }
jebradshaw 0:3ba12980833b 29 }
jebradshaw 1:69e79f1db999 30
jebradshaw 1:69e79f1db999 31 // dc is signed duty cycle (+/-1.0)
jebradshaw 1:69e79f1db999 32 void MotCon::mot_control(float dc, int invert){
jebradshaw 1:69e79f1db999 33 if(dc>1.0)
jebradshaw 1:69e79f1db999 34 dc=1.0;
jebradshaw 1:69e79f1db999 35 if(dc<-1.0)
jebradshaw 1:69e79f1db999 36 dc=-1.0;
jebradshaw 1:69e79f1db999 37
jebradshaw 1:69e79f1db999 38 if(invert==0){
jebradshaw 1:69e79f1db999 39 if(dc > 0.001){
jebradshaw 1:69e79f1db999 40 _dir = 0;
jebradshaw 1:69e79f1db999 41 _pwm = dc;
jebradshaw 1:69e79f1db999 42 }
jebradshaw 1:69e79f1db999 43 else if(dc < -0.001){
jebradshaw 1:69e79f1db999 44 _dir = 1;
jebradshaw 1:69e79f1db999 45 _pwm = abs(dc);
jebradshaw 1:69e79f1db999 46 }
jebradshaw 1:69e79f1db999 47 else{
jebradshaw 1:69e79f1db999 48 _dir = 0;
jebradshaw 1:69e79f1db999 49 _pwm = 0.0;
jebradshaw 1:69e79f1db999 50 }
jebradshaw 1:69e79f1db999 51 }
jebradshaw 1:69e79f1db999 52 else{
jebradshaw 1:69e79f1db999 53 if(dc > 0.001){
jebradshaw 1:69e79f1db999 54 _dir = 1;
jebradshaw 1:69e79f1db999 55 _pwm = dc;
jebradshaw 1:69e79f1db999 56 }
jebradshaw 1:69e79f1db999 57 else if(dc < -0.001){
jebradshaw 1:69e79f1db999 58 _dir = 0;
jebradshaw 1:69e79f1db999 59 _pwm = abs(dc);
jebradshaw 1:69e79f1db999 60 }
jebradshaw 1:69e79f1db999 61 else{
jebradshaw 1:69e79f1db999 62 _dir = 0;
jebradshaw 1:69e79f1db999 63 _pwm = 0.0;
jebradshaw 1:69e79f1db999 64 }
jebradshaw 1:69e79f1db999 65 }
jebradshaw 1:69e79f1db999 66 }