Bidirection port (PIO) in uClinux

Hi,

in last week i changed the port from bidirection on output port and use rotation bits from 0.bit to 31.bit and when i send "0" to 18.bit and 20.bit,

//-------------------------------MAIN-------------------------------------------

int main(int argc, char *argv[])

{ unsigned long l,ch;

int i;

printf("--------------- Start program. ------------\n");

for(;;)

{ l = 1;

for(i=0;i<32;i++)

{ ch=0xffffffff - l;

printf("Write %x.\n",ch);

outl(ch,IO_PIO+0x80000000);

usleep(2);

outl(0xffffffff,IO_PIO+0x80000000);

sleep(2);

l = l*2;

}

}

}

-----------

the system is halted (none possible to use command line in nios2-terminal, everything stop. I disconnected pins on the board from all external "world", but it "works" same. I dont understand why ?

I use EP3C25Q240C8N and use epcs controller, uart, jtag uart, sd card (SPI 3-wire serial), sdram, igor mac and every peripheral device look ok....

Jan