>
>
> In a computer-science project (I'm a student there ;)) I have to
> program an infrared connection between a Palm V and a Linux PC. On the
> Palm side I use the 3.5 SDK (C) and under Linux I would like to use Java
> (or C too, if there isn't a way to do it in Java).
>
> I have succesfully made a HotSync via IrCOMM and have printed stuff on a
> LasterJet 2100N via IrLPT.
> But now I need to program some code to establish a data-connection by
> myself. How can I do it best ? Should I use IrObex or should I use IrComm
> ?
>
> If you can give me some hints (some code examples whould be very very fine
> !), I will thank you very much. :-)
It depends on what sort of connections you want. There are in fact 3 choices:
1. direct ircomm connection
2. ppp over ircomm
3. obex
obex is the nicest protocol in theory, but has a few problems for some
applications on the Palm: you get lots of unavoidable dialogs, and it is
quite slow, and as the Palm only implements Put it is bad for session
type communications. It is the only one I have used and I am happy with
the restrictions. It is very easy to program. Here is a small program to
send an obex message from the Palm which irobex_palm3 can receive, without
a user interface or anything (my first palm program!):
#include <PalmOS.h>
#include <SoundMgr.h>
#include <ExgMgr.h>
#include <StringMgr.h>
ExgSocketType socketP;
Err err;
char *send = "0 message\n";
UInt32 PilotMain (UInt16 cmd, MemPtr cmdPBP, UInt16 launchFlags)
{
// normal application launch (all we deal with)
if (cmd != sysAppLaunchCmdNormalLaunch)
return 0; // ignore other startups
MemSet(&socketP,sizeof(socketP),0);
socketP.target = 'Ctrl';
//socketP.count = 1; // sending 1 object
socketP.length = 1; // of 1 byte
//socketP.localMode = 0;
//socketP.packetMode = 1;
socketP.description = "Palm control message";
socketP.type="text/plain";
socketP.name="control.txt";
if (ExgPut (&socketP))
{
// error - do what?
SndPlaySystemSound(sndAlarm); // make a noise
return 1;
}
ExgSend (&socketP, (void *)send, StrLen(send), &err);
ExgDisconnect(&socketP, err);
return 0;
}
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