[ts-7000] Re: relays control

["naturalwatt" <>]

You should test that both the open() and mmap() calls return sensible values, 
not -1 for error.

You can check with dmesg to see where it is crashing.

--- In  salva g <> wrote:
>
>
> Hi I'm working with this code in order to control relay switch, (the 
> TS-Relay8 Board) on a TS7800,
>
> #include <netinet/in.h>
>  #include <arpa/inet.h>
>  #include <unistd.h>
>  #include <time.h>
>  #include <ctype.h>
>  #include <sys/mman.h>
>  #include <fcntl.h>
> 
>  #define RELAYBASE 0xEE000140
>     
>  int main() 
> {
>       volatile unsigned int *PBDR;
>       unsigned char state; 
>       unsigned char *start; 
>       int fd = open("/dev/mem", O_RDWR|O_SYNC);
>       start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 
> RELAYBASE);
>       PBDR = (unsigned int *)(start + 0x02);
>       state = *PBDR;
>       printf("Result: %x\n",state);
>       return 0;
> }
>
> Can be compiled, but return Segmentation Faults when it runs. Instead, with 
> the shell I can do peek16 0xEE000142 with no problem.
> Any ideas please?
>                                        
> _________________________________________________________________
> Infórmate, mantente en contacto y encuéntralo todo, a la vez. Con la nueva 
> Toolbar de MSN  nunca has tenido tantas ventajas en tan poco espacio.
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>




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