[Gambas-user] using events of serial ports for reading how_?

[Tony Morehen]

Perhaps you could upload the latest version of your code?

What printer are you testing this against?

Have you tried connecting via a terminal program to your printer?  This 
will double check your connection settings and let you see the actual 
response to the commands you are sending.  Another test is to use a 
serial port monitor or sniffer to view your program's serial port activity.


On 2018-08-13 11:35 AM, PICCORO McKAY Lenz wrote:
>
> 2018-08-13 11:16 GMT-04:00 T Lee Davidson <t.lee.davidson at gmail.com 
> <mailto:t.lee.davidson at gmail.com>>:
>
>     You create the printer object, open its port, write to the printer
>     requesting a status report, and then *immediately* you
>
>     manually read the response. After that, for some odd reason, you
>     read the "dataread" property twice, and then the program ends.
>
>  ok but remove later those calls and does not triggered the read 
> event!, inclusivelly if i put a loop in the main module that waiuth 
> "something"
>
>     If you don't call the "rp" function, the program drops through the
>     two "dataread" property reads and ends. When did you expect
>     the _Read event would have a chance to be raised?
>
> was just a experiment, i removed in furter test as i said
>
>     Not sure exactly what you mean with that statement, but it may be
>     the very idea I am trying to impress upon you. Your manual
>     read subroutine gives the printer 500 milliseconds to respond. Why
>     don't you give the Main module at least 500 milliseconds to
>     allow the printer to respond and raise the _Read event?
>
> i put a loop into as i said in the previous paragraph, but still does 
> not happened!
>
>     Or, why not use a semaphore that is visible to the Main module and
>     loop until the _Read event has had an opportunity to fill the
>     "databuffer"?
>
> oh, of course was working in this way, was my first code, ok great but 
> i wish to deal with the read event ..
>
>     You may not have specified that the SerialPort stream should be
>     watched, but it would be logical that Gambas automatically
>     WATCHes a SerialPort in order to be be able to raise the _Read
>     event. (http://gambaswiki.org/wiki/lang/open
>     <http://gambaswiki.org/wiki/lang/open>)
>
>  yeah yeah, when i said "hang at end" i mean that with gambas 3.8 when 
> last sentence executed the programs ends normally, with 3.11 the 
> programs "seems end" but the "play" button of the ide still are 
> deactivate and the ide indicates program does not end...
>
>
>
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