int main(int argc){
int fd,err;
char* myString = "helloworld\n";
fd = open("rtser0", O_RDWR);
printf("fd is %d\n", fd);
ioctl(fd, RTSER_RTIOC_SET_CONFIG, &write_config);
err=write(fd, myString, strlen(myString));
printf("err is %d\n", err);
close(fd);
return 0;
}
gives
sandbox:/home/bkw/code/driver_v4# ./simpledriver_v4
fd is -1
err is -1
Which means that fd didn't open the device successfully? :/
/B
On 13/09/2007, Gilles Chanteperdrix <[EMAIL PROTECTED]> wrote:
> On 9/13/07, Bachman Kharazmi <[EMAIL PROTECTED]> wrote:
> > int main(int argc)
> > {
> > int fd;
> > char* myString = "helloworld\n";
> > fd = open("rtser0", O_RDWR);
> > ioctl(fd, RTSER_RTIOC_SET_CONFIG, &write_config);
> > write(fd, myString, strlen(myString));
> > close(fd);
> > return 0;
> > }
> > Is supposed to be the POSIX skin. It does compile, but nothing sent on
> > my serial port.
>
> This code is crappy. You do not check the return values of functions
> which return a result so you have no chance to understand what
> happens.
>
> --
> Gilles Chanteperdrix
>
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