On Fri, Mar 25, 2011 at 9:07 PM, Gary Thomas <[email protected]> wrote: > How are you connecting to the keyboard? If you are just using stdin, > the default will be the debug/console channel which is not interrupt > driven and select can't help you.
I am new to eCos. Could you please explain a little more. -Ratheesh > On 03/25/2011 09:27 AM, ratheesh kannoth wrote: >> >> On Fri, Mar 25, 2011 at 8:54 PM, Gary Thomas<[email protected]> wrote: >>> >>> On 03/25/2011 09:17 AM, ratheesh kannoth wrote: >>>> >>>> Is there any prob with below code segment in eCos ? >>>> >>>> { >>>> fd_set rd_fds; >>>> >>>> FD_ZERO(&rd_fds); >>>> >>>> while (1) { >>>> >>>> timeout.tv_sec = 1; >>>> timeout.tv_usec = 0; >>>> >>>> if (select(0,&rd_fds, NULL, NULL,&timeout)< >>>> 0) { >>>> printf("\n Error \n"); >>>> sleep(1); >>>> continue; >>>> } >>>> >>>> printf("\n Success \n"); >>>> } >>>> } >>>> >>> >>> Yes - the first parameter to select() is the number of open file >>> descriptors to check (fd in 0..N-1). Putting a zero there will >>> never yield any activity. >>> >>> Typically, one puts the max # of open file descriptors or at >>> least the highest known open one + 1. > >> True. But it runs perfectly on eCos and linux. I facing some >> problem, whenever i hit a key on keyboard in eCos. Is there connection >> to this select system call here. > > How are you connecting to the keyboard? If you are just using stdin, > the default will be the debug/console channel which is not interrupt > driven and select can't help you. > > -- > ------------------------------------------------------------ > Gary Thomas | Consulting for the > MLB Associates | Embedded world > ------------------------------------------------------------ > -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
