the code doesn't work in different type microcontrollers

Projects Programming
1 
#define pwm1 5
#define pwm2 6

void setup(){
   pinMode(pwm1, OUTPUT);
   pinMode(pwm2, OUTPUT);
}

void loop()
{
   analogWrite(pwm1, 0);
   analogWrite(pwm2, 200);
   delay(1000);

   analogWrite(pwm1, 200);
   analogWrite(pwm2, 0);
   delay(1000);
}

I tried to run the dynamo with bts7960 motor driver with this code. When I use it with Arduino UNO, the coding works well. but when I use Arduino Mega 2560, the opposite happens. I simplified my coding by only moving the dynamo in one direction and it worked on Arduino Mega. can you help tell me what error caused it?

2

There is some sort of bug with the current AVR boards core for the MEGA.

I think some of the last posts mention a possible fix/work around.