HPS GPIO's ouputs stuck in high impedence?

Hi Kyle,

Thanks for your support...also would like to know if there are any configurations in the Assignments->Device->Deviceandpinoptions->Unused pins (An input Tristated) to access the pin and see the output. I am using a C file which has hps.h through which I assign GPIO1_SWPORTA_DR_ADDR and configuring these registers to get the output.

eg:

# include <stdio.h>

# include <unistd.h>

# include <fcntl.h>

# include <sys/mman.h>

# include "hwlib.h"

# include "soc_cv_av/socal/socal.h"

# include "soc_cv_av/socal/hps.h"

# include "soc_cv_av/socal/alt_gpio.h"

# define HW_REGS_BASE ( ALT_STM_OFST )

# define HW_REGS_SPAN ( 0x04000000 )

# define HW_REGS_MASK ( HW_REGS_SPAN - 1 )

# define USER_IO_DIR (0x01000008)

# define BIT_LED (0x01000008)

# define BUTTON_MASK (0x02000000)

int main(int argc, char **argv) {

void *virtual_base;

int fd;

uint32_t scan_input;

int i;

// map the address space for the LED registers into user space so we can interact with them.

// we'll actually map in the entire CSR span of the HPS since we want to access various registers within that span

if( ( fd = open( "/dev/mem", ( O_RDWR | O_SYNC ) ) ) == -1 ) {

printf( "ERROR: could not open \"/dev/mem\"...\n" );

return( 1 );

}

virtual_base = mmap( NULL, HW_REGS_SPAN, ( PROT_READ | PROT_WRITE ), MAP_SHARED, fd, HW_REGS_BASE );

if( virtual_base == MAP_FAILED ) {

printf( "ERROR: mmap() failed...\n" );

close( fd );

return( 1 );

}

// initialize the pio controller

// led: set the direction of the HPS GPIO1 bits attached to LEDs to output

alt_clrbits_word( ( virtual_base + ( ( uint32_t )( ALT_GPIO1_SWPORTA_DR_ADDR) & ( uint32_t )( HW_REGS_MASK ) ) ), BIT_LED );

alt_setbits_word( ( virtual_base + ( ( uint32_t )( ALT_GPIO1_SWPORTA_DR_ADDR) & ( uint32_t )( HW_REGS_MASK ) ) ), USER_IO_DIR );

so this should work..Let me know get some idea

--Ravi