[Gambas-user] using events of serial ports for reading how_?
PICCORO McKAY Lenz
mckaygerhard at gmail.com
Tue Aug 14 14:41:37 CEST 2018
Hi T Lee, your code suggestion was implemented various mails ago, a flag
was implemented in the code, and it's works of course as i said
but now i want to experiment with the event and watchers,and I REPEAT, part
of the problem was solved, xzMarce provided the "very advanced info" (seems
that i did not reply to the list, sorry for that)
my apologies, i did not reply the solution and assumed that all read it!
posted now here:
So: thanks to zxMarce i got the "why", the time to respond from the printer
are not fixed and due for all commands we need/xpected a response from the
printer
the problem it's all the fiscal kit have a maximunt time to "waith to data"
(i think it's how write it in english)
so in my classes must be defined at each inherits implementatino and must
override the waith of the
read event to xpect data on the buffer
As noted, this it's a problem taking in consideration the object model of
the gambas (in java was easy with interfaces)
so the proper way it's to implement also not only the write operation, the
Read operation too in each class inherints
Now, my question: can i override the "Read" event in each class without
impact in performance and object class model?
So T Lee and others, unfortunatelly i'm programing in blind mode, i explain:
a fiscal kit printer it's a ad-hoc system, so them you must be with it to
property understand..
so then, due that i try to explain the behaviour of the serial and signals
to build a better, A BETTER implementqation for linux
i'm a very active contributor, but in linux there's too much "mysql+php"
and we need more advanced solutions not yet provided!
we need a more expanded view and vision ok, right?
so thanks to xzMarce for the info, and if you want to know wicht info, was
posted by me two mails ago from here!
DP: for all of here in gambas list: lazarus: puff it's like return to the
stone eera, but with airplane, so i'll will the "dragon that fly" ( "how
hard its to be a good"), the lazarus forums does not have any advanced
project, more that a accounting system named "Leonux" and "BRP-sopftware"
(that last are not free), so apart if you have a code made in fpc version
X.1 the next version will break your compilation and must recompile it! in
conclusion seems more a headhache!
2018-08-13 20:10 GMT-04:00 T Lee Davidson <t.lee.davidson at gmail.com>:
> Here, try this simple program, PICCORO:
>
>
> [code]
> ' Gambas module file
>
> Public SComm As SerialPort
> Public databuffer As String = ""
> Public DataHasBeenRead As Boolean = False
>
> Public Sub Main()
>
> SComm = New SerialPort As "SComm"
> SComm.PortName = "/dev/ttyS1"
> SComm.Speed = 9600
> SComm.Parity = 0
> SComm.DataBits = 8
> SComm.StopBits = 1
> SComm.FlowControl = 2
> Try SComm.Open()
> If Error Then
> Print "Error: " & Error.Text
> Quit
> Endif
>
> Print #SComm, Chr(2) & "_" & Chr(3)
>
> Do
> Wait 0.1
> Loop Until DataHasBeenRead
> Print databuffer
>
> End
>
> Public Sub SComm_Read()
>
> Read #SComm, databuffer, Lof(SComm)
> DataHasBeenRead = True
>
> End
> [/code]
>
> Does it work? If so, then problem solved.
>
> I'm done. Good luck.
>
>
> ___
> Lee
>
> P.S. Tony was certainly not "srcreaming garbage" [sic], just pointing out
> facts of your behavior.
>
> The world may not be the "little hole of mysql", but Gambas works with the
> major non-proprietary and open-source databases MySQL
> and PostgreSQL. If you need it to work with proprietary databases, you are
> invited to develop and contribute the code to do so.
>
> Or, perhaps Lazarus would meet your expectations. However, I doubt the
> dedicated and helpful people at the Lazarus forum would
> tolerate your unappreciative and obnoxious attitude for very long.
>
> On 08/13/2018 03:28 PM, PICCORO McKAY Lenz wrote:
> > Tony all the information was given:
> >
> > 1 it's a fiscal printer, there's no sense in give you that are a epson
> dot matrix due you need the kit's in place to test
> >
> > 2 i tested and make many mothns ago a POS systems so test with command
> line the kit was done! please!
> >
> > 3) of course commands are ver very correct! i receive data but not as
> planned by the event as T Lee said!
> >
> > about the odbc, i provide the odbc driver info, TDS do you noted and
> read the issues?
> > and connection string info, i not the only that suffers the odbc
> problem, the world are not the "little hole of mysql" right!
> >
> > please seems are you the guy that are "srcreaming garbage"
> >
> > Lenz McKAY Gerardo (PICCORO)
> > http://qgqlochekone.blogspot.com
> >
> > 2018-08-13 15:22 GMT-04:00 Tony Morehen <tmorehen at ajm-software.com
> <mailto:tmorehen at ajm-software.com>>:
> >
> > I give up trying to help you. I asked 3 questions. You ignored two
> and said there is no point in answering the other. How
> > can anyone help you when you refuse to provide any information?
> >
> > It's like the ODBC problems you've been yelling and screaming
> about. You don't even give basic information like what odbc
> > driver you are using, including version.
> >
> >
> > On 2018-08-13 02:48 PM, PICCORO McKAY Lenz wrote:
> >> well it's a fiscal printer, so there's no sense in tell you taht
> it's a epson dot matrix
> >>
> >> i put more delay and now event raised! i mean, 0.5 ms in main
> module event in the property event!
> >> and 0.1 ms in the read function..
> >>
> >> but if i put tyhe delay in any other place that are not in the main
> there's no read event raised!
> >>
> >> ans somethings does not happened (very rare times)
> >>
> >> Lenz McKAY Gerardo (PICCORO)
> >> http://qgqlochekone.blogspot.com <http://qgqlochekone.blogspot.com>
> >>
> >> 2018-08-13 13:52 GMT-04:00 Tony Morehen <tmorehen at ajm-software.com
> <mailto:tmorehen at ajm-software.com>>:
> >>
> >> 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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