> When I'm using my own application, sometimes I'm able to retreive the
> messages but
> mostly I get random behaviour like timeouts, fatal exceptions
> or the Palm
> just hangs.
without your source its difficult to say. i have no problems with the serial
port of the palm (III).
i am opening the serial port after receiving sysAppLaunchCmdNormalLaunch
all the communication is done after a button press.
opening
---
#define SERIAL_BUFFER_SIZE 256
UInt gSerialRefNum;
char gSerialBuffer[SERIAL_BUFFER_SIZE];
unsigned int nSerialCount;
err = SysLibFind("Serial Library", &gSerialRefNum);
ErrNonFatalDisplayIf(err != 0, "Can't find serial library");
err = SerOpen(gSerialRefNum, 0, 19200);
---
sending to the device
---
char b[20];
Err err;
//0100L010031
b[0] = xxx;
b[1] = xxx;
b[2] = xxx;
b[3] = xxx;
b[4] = xxx;
SerSend(gSerialRefNum, &b, 5, &err);
if (err != 0) {
FormPtr frm = FrmGetActiveForm();
FieldPtr StatusFld=(FieldPtr)FrmGetObjectPtr(frm,
FrmGetObjectIndex(frm, MainFormStatusFieldField));
FldSetTextPtr(StatusFld, "error sending!");
FldDrawField(StatusFld);
}
---
waiting for response from the device
---
int Wait4Answer(void)
{
Err err;
ULong rec;
char read;
int loop = 0;
do {
rec = SerReceive(gSerialRefNum, &read, 1, 100, &err);
if (err == 0) gSerialBuffer[loop++] = read;
} while ((err == 0) && (read != END_DESCRIPTOR));
if (err != 0) return ERR_TIMEOUT;
loop--; // loop is now last value in
array (END_DESCRIPTOR)
return NOERROR;
}
---
which compiler do you use (mw or gnu)? can you debug the application using
pose? i have no problems in debugging serial port communication software
with pose - just make sure that you use a adapter which crosses rxd and txd
lines.
good luck, roland
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Roland Aigner - Skidata Austria |
| airo at skidata dot com |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
all men like good head. president clinton fell for monica-head,
but as for me, i'll take mot�rhead and day - ron jeromy
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
