[HELP]Does 8051 not support pointer as good as PIC?

[croket_2512]

Hello,

I have a simple program to test pointer variable for 8051 and PIC. This variable uses to pass an IO port into a function. Here it is:

Code: Select all

void Port_LED_0(unsigned char *);
void Port_LED_1(unsigned char *);

void Port_LED_0(unsigned char *port)
{
 (*port) = 0;
}

void Port_LED_1(unsigned char *port)
{
 (*port) = 0xFF;
}

void main(void)
{
 Port_LED_0(&P2); //For PIC: Port_LED_0(&PORTB);
 Delay_ms(500);
 Port_LED_1(&P2); //For PIC: Port_LED_1(&PORTB);
 Delay_ms(500);
}

The problem is the program executes on PIC good but do not excutes on 8051. The LEDs don't blink. And when I compare the Button library of mikroC between 8051 and PIC, I see some differences between them. So, does the the architecture 8051 not support pointer as good as PIC or does the compiler have error inside it or my program is wrong?

Thank you for reading.

Best regards.

[croket_2512]

Hi,

Can someone help me?

Best regards.

[nemanja.nikolic]

Hello,

Configure PORTB as digital and output.
Your code does not work in mikroC PRO for PIC.
Please read about pointers in c language.

I was modify your code and now work on PIC.

Code: Select all

void Port_LED_0(unsigned char *);
void Port_LED_1(unsigned char *);

void Port_LED_0(unsigned char *port)
{
 (*port) = 0;
}

void Port_LED_1(unsigned char *port)
{
 (*port) = 0xFF;
}

void main(void)
{
 TRISB=0x00;
 
 while (1){
    Port_LED_0(&PORTB); //For PIC: Port_LED_0(&PORTB);
    Delay_ms(500);
    Port_LED_1(&PORTB); //For PIC: Port_LED_1(&PORTB);
    Delay_ms(500);
 }
 
}

Nemanja.

Best regards.

[croket_2512]

Hi,

You misunderstand my mind. I mean the code doesn't work on 8051, it works good on PIC. I keep in my mind, we all know config IO port for PIC, so I didn't write down here.

Best regards.

[filip]

Hi,

You are right, something is definitely wrong, we will investigate this.

Regards,
Filip.

[croket_2512]

Hi,

I will waiting for you. Thank you so much, all of you!

Best regards.