Do you have the stop bit and parity set correctly? Are you using the
correct cable? You don't seem to be testing any of the serial functions for
returned errors. Are they executing correctly and not returning errors? Is
your external device actually sending any data?
----- Original Message -----
From: "suresh" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Tuesday, March 05, 2002 9:32 PM
Subject: Please help me -RS-232 communication error .
> Hi
>
>
> I am attempting to read the RS-232 serial output from a
> external device from(digital converted Loadcell output) my palm to
store.The
> device will send the output to the 9 pin serial connector once it receives
> the call from the palm(ie character "A").I tried so many times but i could
> not read the output.
>
> I set the same baud rate at both ends. Here is my code.
>
> Boolean doSend()
> {
> Err errP;
> UInt16 i;
> UInt16 newPortIdP;
>
> Char pBuf[10];
> Char pBuf2[10];
>
> UInt32 bytes = 10;
> Int32 timeout = 1000;
> FormPtr activeForm;
> //FrmGetObjectIndex(activeForm, MainList);
> FieldType* fldP;
> UInt32 actualRead = 0;
> UInt32 actualSent = 0;
> UInt32 cnt=0;
> UInt16 refNumP;
>
> StrNCopy(pBuf, "AA", 2);
>
> SysLibFind("Serial Library", &refNumP);
> SerOpen(refNumP, 0, 1200);
> actualSent = SerSend(refNumP, pBuf, 1, &errP);
> actualRead = SerReceive(refNumP, pBuf2, 5, 1000, &errP);
> SerClose(refNumP);
>
>
> /*SrmOpen(serPortCradlePort , 1200, &newPortIdP);
> actualSent = SrmSend(newPortIdP, pBuf, 1, &errP);
> actualRead = SrmReceive(newPortIdP, pBuf2, 5, 1000, &errP);
>
> SrmClose(newPortIdP);*/
>
> activeForm = FrmGetActiveForm();
> fldP = FrmGetObjectPtr(activeForm, FrmGetObjectIndex(activeForm,
> EDT_DISPLAY));
> FldInsert(fldP, pBuf2, StrLen(pBuf2));
>
> activeForm = FrmGetActiveForm();
> fldP = FrmGetObjectPtr(activeForm, FrmGetObjectIndex(activeForm,
> EDT_DISPLAY));
> FldInsert(fldP, "Ok", 2);
> }
>
>
>
> Thanks in advance
>
> Sureshbabu
>
>
>
>
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