[ts-7000] Unable to set anything but B[1] on TS-7800 PC-104

["craignied" <>]

This is really strange.  The following code should set all of the TS-7800 
PC-104's row A to square waves when OFFSET is 0x10, all of row B when it's 
0x14, C when it's 0x18 and D when it's 0x1C, right?  But I'm only seeing a 
square wave on the 2nd pin of row B (the first pin is GND.)  None of the other 
pins in row B show waves when OFFSET is 0x14, and none of the other rows ever 
show waves no matter what the OFFSET is.  What am I doing wrong?

TIA,
Craig

#include <stdio.h>      // printf()
#include <fcntl.h>      // open()
#include <sys/mman.h>   // mmap()
#include <unistd.h>     // getpagesize()
#include <assert.h>

#define BASE    0xE8000000
#define OFFSET  0x10

int main(int argc, char **argv)
{
        volatile unsigned int *base, *DR, *DDR;
        unsigned int i, val;

        int fd= open( "/dev/mem", O_RDWR|O_SYNC );
        assert( fd != -1 );
        
        // Get pointers to the base address, GPIO and DDR registers
        base = ( unsigned int * ) mmap( 0, getpagesize(), PROT_READ | 
PROT_WRITE, MAP_SHARED, fd, BASE );
        DR =  ( unsigned int * ) ( base + ( OFFSET / 0x04 ) ); // data register
        DDR =  ( unsigned int * ) ( base +  ( ( OFFSET + 0x10 ) / 0x04 ) ); // 
data direction register
        
        *DDR = 0xFFFFFFFF; // set all on DDR to outputs
        
        for ( i = 0; i < 100000; i++ )
        {
                *DR = 0xFFFFFFFF; // turn all pins on DR on
                usleep( 10000 );
                *DR = 0x0; // turn 'em off
                usleep( 10000 );
        }
        
        close( fd );
        return 0;
}



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