replacing a hbridge l298 with a roboclae

hi

io have this osoyoo code (below). i want to replace the std H bridge l298 motor driver with a much powerful roboclaw 30a. i have to change the way the Arduino mega communicates with the dirver. need help with amending the osoyoo code to accommodate the new serial communication used with roboclaw. is there a quck
code to replace in the osoyoo supplied code?

thanks
the osoyoo code

/*  ___   ___  ___  _   _  ___   ___   ____ ___  ____  
 * / _ \ /___)/ _ \| | | |/ _ \ / _ \ / ___) _ \|    \ 
 *| |_| |___ | |_| | |_| | |_| | |_| ( (__| |_| | | | |
 * \___/(___/ \___/ \__  |\___/ \___(_)____)___/|_|_|_|
 *                  (____/ 
 * Arduino Mecanum Omni Direction Wheel Robot Car
 * Tutorial URL http://osoyoo.com/?p=30022
 * CopyRight www.osoyoo.com

 * After running the code, smart car will 
 * go forward and go backward for 2 seconds, 
 * left turn and right turn for 2 seconds, 
 * right shift and left shift for 2 seconds,
 * left diagonal back and right diagonal forward for 2 seconds,
 * left diagonal forward and right diagonal back for 2 seconds,
 * then stop. 
 * 
 */
#define SPEED 140    
#define TURN_SPEED 160    
#define speedPinR 9   //  Front Wheel PWM pin connect Right MODEL-X ENA 
#define RightMotorDirPin1  22    //Front Right Motor direction pin 1 to Right MODEL-X IN1  (K1)
#define RightMotorDirPin2  24   //Front Right Motor direction pin 2 to Right MODEL-X IN2   (K1)                                 
#define LeftMotorDirPin1  26    //Front Left Motor direction pin 1 to Right MODEL-X IN3 (K3)
#define LeftMotorDirPin2  28   //Front Left Motor direction pin 2 to Right MODEL-X IN4 (K3)
#define speedPinL 10   //  Front Wheel PWM pin connect Right MODEL-X ENB

#define speedPinRB 11   //  Rear Wheel PWM pin connect Left MODEL-X ENA 
#define RightMotorDirPin1B  5    //Rear Right Motor direction pin 1 to Left  MODEL-X IN1 ( K1)
#define RightMotorDirPin2B 6    //Rear Right Motor direction pin 2 to Left  MODEL-X IN2 ( K1) 
#define LeftMotorDirPin1B 7    //Rear Left Motor direction pin 1 to Left  MODEL-X IN3  (K3)
#define LeftMotorDirPin2B 8  //Rear Left Motor direction pin 2 to Left  MODEL-X IN4 (K3)
#define speedPinLB 12    //  Rear Wheel PWM pin connect Left MODEL-X ENB

/*motor control*/
void go_advance(int speed){
   RL_fwd(speed);
   RR_fwd(speed);
   FR_fwd(speed);
   FL_fwd(speed); 
}
void go_back(int speed){
   RL_bck(speed);
   RR_bck(speed);
   FR_bck(speed);
   FL_bck(speed); 
}
void right_shift(int speed_fl_fwd,int speed_rl_bck ,int speed_rr_fwd,int speed_fr_bck) {
  FL_fwd(speed_fl_fwd); 
  RL_bck(speed_rl_bck); 
  RR_fwd(speed_rr_fwd);
  FR_bck(speed_fr_bck);
}
void left_shift(int speed_fl_bck,int speed_rl_fwd ,int speed_rr_bck,int speed_fr_fwd){
   FL_bck(speed_fl_bck);
   RL_fwd(speed_rl_fwd);
   RR_bck(speed_rr_bck);
   FR_fwd(speed_fr_fwd);
}

void left_turn(int speed){
   RL_bck(0);
   RR_fwd(speed);
   FR_fwd(speed);
   FL_bck(0); 
}
void right_turn(int speed){
   RL_fwd(speed);
   RR_bck(0);
   FR_bck(0);
   FL_fwd(speed); 
}
void left_back(int speed){
   RL_fwd(0);
   RR_bck(speed);
   FR_bck(speed);
   FL_fwd(0); 
}
void right_back(int speed){
   RL_bck(speed);
   RR_fwd(0);
   FR_fwd(0);
   FL_bck(speed); 
}
void clockwise(int speed){
   RL_fwd(speed);
   RR_bck(speed);
   FR_bck(speed);
   FL_fwd(speed); 
}
void countclockwise(int speed){
   RL_bck(speed);
   RR_fwd(speed);
   FR_fwd(speed);
   FL_bck(speed); 
}


void FR_fwd(int speed)  //front-right wheel forward turn
{
  digitalWrite(RightMotorDirPin1,HIGH);
  digitalWrite(RightMotorDirPin2,LOW); 
  analogWrite(speedPinR,speed);
}
void FR_bck(int speed) // front-right wheel backward turn
{
  digitalWrite(RightMotorDirPin1,LOW);
  digitalWrite(RightMotorDirPin2,HIGH); 
  analogWrite(speedPinR,speed);
}
void FL_fwd(int speed) // front-left wheel forward turn
{
  digitalWrite(LeftMotorDirPin1,HIGH);
  digitalWrite(LeftMotorDirPin2,LOW);
  analogWrite(speedPinL,speed);
}
void FL_bck(int speed) // front-left wheel backward turn
{
  digitalWrite(LeftMotorDirPin1,LOW);
  digitalWrite(LeftMotorDirPin2,HIGH);
  analogWrite(speedPinL,speed);
}

void RR_fwd(int speed)  //rear-right wheel forward turn
{
  digitalWrite(RightMotorDirPin1B, HIGH);
  digitalWrite(RightMotorDirPin2B,LOW); 
  analogWrite(speedPinRB,speed);
}
void RR_bck(int speed)  //rear-right wheel backward turn
{
  digitalWrite(RightMotorDirPin1B, LOW);
  digitalWrite(RightMotorDirPin2B,HIGH); 
  analogWrite(speedPinRB,speed);
}
void RL_fwd(int speed)  //rear-left wheel forward turn
{
  digitalWrite(LeftMotorDirPin1B,HIGH);
  digitalWrite(LeftMotorDirPin2B,LOW);
  analogWrite(speedPinLB,speed);
}
void RL_bck(int speed)    //rear-left wheel backward turn
{
  digitalWrite(LeftMotorDirPin1B,LOW);
  digitalWrite(LeftMotorDirPin2B,HIGH);
  analogWrite(speedPinLB,speed);
}
 
void stop_Stop()    //Stop
{
  analogWrite(speedPinLB,0);
  analogWrite(speedPinRB,0);
  analogWrite(speedPinL,0);
  analogWrite(speedPinR,0);
}


//Pins initialize
void init_GPIO()
{
  pinMode(RightMotorDirPin1, OUTPUT); 
  pinMode(RightMotorDirPin2, OUTPUT); 
  pinMode(speedPinL, OUTPUT);  
 
  pinMode(LeftMotorDirPin1, OUTPUT);
  pinMode(LeftMotorDirPin2, OUTPUT); 
  pinMode(speedPinR, OUTPUT);
  pinMode(RightMotorDirPin1B, OUTPUT); 
  pinMode(RightMotorDirPin2B, OUTPUT); 
  pinMode(speedPinLB, OUTPUT);  
 
  pinMode(LeftMotorDirPin1B, OUTPUT);
  pinMode(LeftMotorDirPin2B, OUTPUT); 
  pinMode(speedPinRB, OUTPUT);
   
  stop_Stop();
}

void setup()
{
  init_GPIO();
 
go_advance(SPEED);
     delay(1000);
     stop_Stop();
     delay(1000);
  
go_back(SPEED);
      delay(1000);
      stop_Stop();
      delay(1000);
	  
left_turn(TURN_SPEED);
      delay(1000);
      stop_Stop();
      delay(1000);
	  
right_turn(TURN_SPEED);
     delay(1000);
     stop_Stop();
     delay(1000);
  
right_shift(200,200,200,200); //right shift
     delay(1000);
     stop_Stop();
     delay(1000);

left_shift(200,200,200,200); //left shift
     delay(1000);
     stop_Stop();
     delay(1000);
	 
left_shift(200,0,200,0); //left diagonal back
     delay(1000);
     stop_Stop();
	 delay(1000);
 
right_shift(200,0,200,0); //right diagonal ahead
     delay(1000);
     stop_Stop();
	 delay(1000);

left_shift(0,200,0,200); //left diagonal ahead
     delay(1000);
     stop_Stop();
     delay(1000);

right_shift(0,200,0,200); //right diagonal back
     delay(1000);
     stop_Stop();
	 delay(1000);
}

void loop(){
}

the std roboclaw code is

//Includes required to use Roboclaw library
#include <SoftwareSerial.h>
#include "RoboClaw.h"

//See limitations of Arduino SoftwareSerial
SoftwareSerial serial(10,11);	
RoboClaw roboclaw(&serial,10000);

#define address 0x80

void setup() {
  //Open roboclaw serial ports
  roboclaw.begin(38400);
}

void loop() {
  roboclaw.ForwardM1(address,127); //start Motor1 forward at half speed
  roboclaw.BackwardM2(address,127); //start Motor2 backward at half speed