[ts-7000] Mapping to DIO Registers

["yavin229" <>]

Hi all, I am trying to map to the DIO registers at memory location 0x80840004 
per the 7260 manual am getting an error of:

spi0: spi0.c:33: main: Assertion `memloc != ((void *) -1)' failed.
Aborted

If I move the memory address to 0x80840000 it runs but this is the byte memory 
location for the LCD and not the DIO (as I understand). My program is below, 
does anyone see anything obvious I am missing here? Thanks!


#define MEMLOC 0x80840004


int fd,result;

int main ()
{
volatile unsigned char *memloc;

fd = open("/dev/mem", O_RDWR|O_SYNC);

if (fd == -1){

        perror("open(/dev/mem):");
        return 0;
}


memloc = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED, fd, MEMLOC);
        assert(memloc != MAP_FAILED);


printf("Memloc equals %X \n", *memloc);

close(fd);

}



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