Hi,
We have a solution working on the AdderII platform, using eCos.
One component of the application is a serial terminal, with
termios support. While putting the UI through its paces we
came across a small issue:
If we hit enter a number of times prior to the first select()
call, select() does not return when a key is pressed. I
thought that it could be to a full UART buffer, but trying
cin.ignore()
or
tcflush(fd,TCIOFLUSH)
prior to the select does not fix the issue.
My code looks something as follows:
struct termios ts, ots; /* termios setting, old termios setting */
int fd = STDIN_FILENO;
struct timeval tv;
struct timeval *tvPtr = NULL;
tcgetattr( fd, &ts );
ots = ts;
ts.c_flag &= ~(ICANON);
tcsetattr(fd, TCSAFLUSH, &ts);
if ( this->timeout > -1 )
{
tv.tv_sec = this->timeout;
tv.tv_usec = 0;
tvPtr = &tv;
}
FD_ZERO( &fds );
FD_SET( STDIN_FILENO, &fds );
int result = select(fd + 1, &fds, NULL, NULL, tvPtr);
Am I missing something? Any help would be appreciated.
Andre
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