When reading from a serial port, there is no EOF between data sets. I may
have to use something else besides a scanner to do this. I have a handler
function called by a goroutine that just monitors incoming data in a for
loop and sends that data coming in back through a channel. If the
connection closes, I need a way to signal this loop to close so that the
function can return and end.
On Sunday, December 30, 2018 at 6:48:21 PM UTC-6, Wagner Riffel wrote:
>
> Scan() returns false when it reaches EOF or an error, so with what you
> provided i assume you're missing to check that.
> for ns.Scan() {
> ...
> }
>
> or
>
> for {
> if !ns.Scan() {
> break
> }
>
> -wgr
>
> On Sun, Dec 30, 2018 at 10:36 PM Trig <[email protected] <javascript:>>
> wrote:
> >
> > I'm currently utilizing the bufio.NewScanner to read ASCII data from a
> serial port. I have the following simple code:
> >
> > ns := bufio.NewScanner(sPort)
> >
> > for {
> > ns.Scan()
> > if ns.Text() != "" { // ignore blank lines
> > // handle content here
> > }
> > }
> >
> > The problem is ns.Scan() blocks the loop from continuing if there isn't
> any data. This leaves me unable to break out of the loop with a for
> condition or a select statement also within the loop which is looking for a
> close command from a channel before or after it, etc. Am I doing something
> wrong, or is there a proper way to handle this?
> >
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