Why MC8051 IP core failed in Endless loop?

[junxiu6]

MC8051 IP core is used in spartan3e, software is ISE 11.1. While running a program like fllowing, the LEDs wink all the time.

Main() {
        P1=0x55;   // P1 is connected to LEDs.
        delay(30);
        P1=0xaa;
        delay(30); 
	}

Does mc8051 go to the first place and do it again?

What’s the problem?

Thanks for your reply.

Junsoo

 

[millwood]

because you don't understand how the compiler deals with a return from the main().

 

[junxiu6]

because you don't understand how the compiler deals with a return from the main().

To millwood

how to do?

 

[hock]

Main()
{
while(1)
{
P1=0x55; // P1 is connected to LEDs.
delay(30);
P1=0xaa;
delay(30);
}
}

 

[junxiu6]

Main()
{
while(1)
{
P1=0x55; // P1 is connected to LEDs.
delay(30);
P1=0xaa;
delay(30);
}
}

Even if while(1) {} isn't used, the program is failed in endless loop.

 

[millwood]

Even if while(1) {} isn't used, the program is failed in endless loop.

because you don't understand how the compiler deals with a return from the main().

 

[junxiu6]

Even if while(1) {} isn't used, the program is failed in endless loop.

because you don't understand how the compiler deals with a return from the main().

Can you tell me what I can do? I'm really appreciated.

The detailed situation is shown in attached.