Question on using an SPX Tiller Drive using a Simple H Bridge /PyPilot

[Redline]

I have an old SPX tiller pilot drive, but no functional controller.  I have an old 25A Rated  H Bridge, that I tested with my own Arduino code with a Simple Fwd/Reverse button.  I have an Adruino Uno I'm playing around with and an old Raspberry Pi 3B+


I'm trying to control this  in  Openplotter/Pypilot .

But looking at the Motor.ino sketch the logic of the H bridge mode seems a little different ( eg a single PWM and two enable lines?) .  

THe controller I have requires 3 control wires. (apart from the motor/power supply wiring itself) 

1) Motor Enable (EA) ( set to 5v)  Any Digital out ( I use pin 6)  from the Arduino set to high will enable the motor
2) PWM Input Channel A (PA) I set connect this from a PWM (Pin3)  on the Arduino.  
3) PWM Input Channel B (PB) I also connect this to an Arduino PWM (pin 5)  output.

To make the motor run forwards :

        digitalWrite(MotorEnablePIN,HIGH);
        analogWrite(FwdPWMPin,255);
        analogWrite(RevPWMPin,0);

To make it run backwards 
      digitalWrite(MotorEnablePIN,HIGH);
     analogWrite(FwdPWMPin,0);
     analogWrite(RevPWMPin,255);

IF you vary the 255, that will control the speed of the motor.  Hooked it all up with two push buttons and it worked fine.  eg I can move the ram forward and backwards by pushing the fwd/reverse buttons.  THe motor is runs at full speed when I hold a button down. 


I'll try to follow and rewire my setup to suit the pinout of the Motor.ino sketch which will mean modifying the pins I've used in my test set-up.  

But it uses Pin9 only for the PWM if im correct.   So wondering what code to modify to make the Motor.ino sketch work with my H bridge?  And Which pins to wire up using this controller with the motor.ino sketch? 


PS attached some info on how I connected it all together to test the Ram works from 12v which it does via two simple push buttons. 

sketch info copied below as it wont allow me to add a .ino file? 

*****************************************************************


int FwdPWMPin =3;

int RevPWMPin = 5;
int MotorEnable = 6;
int mspeed=255;

int FwdButtonIP= 12;
int RevButtonIP=13;

int buttonStateFwd = 0;
int buttonStateRev = 0;

//06/05/21  This Sketch makes the Linear A/p function 
//THe Motor Enable set at 5v was the key step in making this H bridge work
// You use a PWM Digital IO via Analgue write to set the speed of the motor, which also serves as the input. One must be low=0 the other highish with 255 being max speed.


void setup() {
 
pinMode ( FwdPWMPin,OUTPUT);
pinMode ( RevPWMPin,OUTPUT);
pinMode( MotorEnable,OUTPUT);

pinMode( FwdButtonIP,INPUT);
pinMode( RevButtonIP,INPUT);

Serial.begin(9600);

}

void loop() {
 
  
 buttonStateFwd= digitalRead(FwdButtonIP);
 buttonStateRev= digitalRead(RevButtonIP);

   if (buttonStateFwd== HIGH)
     {
      //Fwd first
      //Serial.print("Forward Pressed");
      //Serial.println();
        buttonStateRev=0 ;//avoid both buttons being pressed
        digitalWrite(MotorEnable,HIGH);
        analogWrite(FwdPWMPin,255);
        analogWrite(RevPWMPin,0);
     }
   else if(buttonStateRev==HIGH)
     {
      
        buttonStateFwd=0;
       digitalWrite(MotorEnable,HIGH);
       //then reverse
      //Serial.print("Reverse Pressed");
      //Serial.println();    
      analogWrite(FwdPWMPin,0);
      analogWrite(RevPWMPin,255);
     }
    else
     {
        digitalWrite(MotorEnable,LOW);
        analogWrite(FwdPWMPin,0);
        analogWrite(RevPWMPin,0);
     }             
  
 
}

[seandepagnier]

you will want to operate in hbridge mode then, and use d9 and d10 for pwm outputs for each direction. If you ground D6, hbridge mode is used

[Redline]

you will want to operate in hbridge mode then, and use d9 and d10 for pwm outputs for each direction.   If you ground D6, hbridge mode is used

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Thanks. Ok will use pins 9 & 10 and H bridge mode. I also need an enable pin set to 5v. Is there one in the std motor.ino or should I define a new one ?

[seandepagnier]

yes, you can use the clutch pin 11