[ts-7000] Re: TS-7400 DIO

["islandwind" <>]

--- In  Rodrigo Gómez <> wrote:
>
> I chage the line:
> control = (char *)mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, fd,
> 0x12000000);
> and even send the error data (segmentation fault).
>
> Any other sugestion?
>
> rgo
> --- In  "Yan Seiner" <yan@> wrote:
> >
> > --- In  Rodrigo Gómez <smrodin@> wrote:
> > >
> > > Hello everybody
> > >
> > > Have some of you accessed at DIOs 16 and 17 in the 7400?
> > >
> > > I tried to acces to memory map, but the program returned
"segmentation
> > > fault"
> > > I just tried the address in the manual:
> > > "0x1200_0001: GPIO direction/data for DIO_16 to DIO_19
> > >   bit 3:0 - data register
> > >   bit 7:4 - data direction register ('1' means 'output')"
> > >
> > > My code is:
> > > #include <sys/mman.h>
> > > #include <sys/types.h>
> > > #include <sys/stat.h>
> > > #include <fcntl.h>
> > > #include <unistd.h>
> > >
> > > int main(int argc, char *argv[])
> > > {
> > >   int fd = open("/dev/mem", O_RDWR|O_SYNC);
> > >   int ledPrender;
> > >   unsigned char *control;
> > > control = (char *)mmap(0, 4096, PROT_READ|PROT_WRITE,
MAP_SHARED, fd,
> > > 0x12000001);
> >
> > This doesn't look page aligned... 0x12000000 maybe?
> >
> > > control[0] = 0xF0;
> > > control[0] = 1;
> > > }
> > > I'm runnig with root permisions over debian running in a USB memory
> > > Any help would be great!
> > > Thanks
> > > rgo
> > >
> >
>
Did you check if DIO16 and DIO17 are being used in somewhere else ?
For example default console I/O ? (since they are usart2 receive and
transmit ports)




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