On Wed, 23 Sep 2015 10:21:58 +0200 (CEST), Michael Van Canneyt <[email protected]> wrote:
>On Wed, 23 Sep 2015, Bo Berglund wrote: > >> I have looked for a native FPC TCP/IP socket to use as a replacement >> for a serial port component and I discovered the ssockets unit that >> ships with FPC and contains a TInetSocket class. >> This seemed useful. > >> The data shifted through the socket will be EXACTLY the same as was >> earlier transferred by RS232. >> >> Any suggestions on where I can find suitable documentation? >> > >Shortly said: There is none. > >If the various demo programs are not understandable for you, you are out of >luck :( > >Now, from what you describe, all you need to do is use the read/write >methods to send and receive data, just as in any stream: the client >TInetSock is a TStream descendent. > >Thread programming is not so difficult, but I am not convinced that for the >use case you describe, threads are really needed (despite suggestions to the >contrary on this list). Thanks for the pointers! Back in September I was looking for the solution on this but at the time not yet on an RPi2, but on Windows. I was also then adviced to search for an example of TInetSocket and had a look at ssockets usage in the example: lazarus\fpc\2.6.4\source\packages\fcl-base\examples\dsockcli.pp But the example is pretty limited regarding how one actually communicates using the sockets provided by ssockets. All it seems to do is to connect to a server and write the same line of text 10 times over and then quit. What I must do is plug a socket into the existing code where there is bidirectional data transfers using a receive event and there will be a response for each packet sent. In another thread on the fpc list I was directed towards an example I could download from: https://github.com/silvioprog/tcpipcomp And it looks more complete, there is a chat example which implements a bidirectional system using a thread too. I will try to stuff this into the existing code if possible... As Mark Morgan Lloyd has pointed out I *really* need to create an encapsulated class for the TCPIP communications so I can use this as an alternate component in the existing object and for this I need to implement an onReceive event to plug the incoming data into it. Otherwise I am in for a really big rewrite of the class. Struggling on... -- Bo Berglund Developer in Sweden -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
