Hello All,
I have an application that continously talks to a device through the serial
port. I started to have some issues when sending and receiving large amounts
of data. After many hours of "process of elimination" type coding I have
found out that when sending serially using SerSend, it stops sending after
about 2500 iterations. Yes, I was desperate and built a loop to do this.
If I close the port and exit the program it will give me another 2500
iterations.
If I close the serial port and then try to send again it seems as though
program flow does not return from SerSend.
What I don't know is, is this a constraint or am I sending my information
incorrectly? If it is a constraint, can one code around it. If it is not a
constraint, what am I doing wrong?
Code is below:
case ContactDetailStart1Button:
{
err = SysLibFind( "Serial Library", &gSerialRefNum );
ErrNonFatalDisplayIf( err!=0, "Can't find serial library" );
err = SerOpen( gSerialRefNum, 0, 9600 );
if( err!=0 )
{
if( err == serErrAlreadyOpen )
{
FrmAlert(SerialInUseAlert);
SerClose( gSerialRefNum );
}
else
FrmAlert(CantopenserialAlert);
return false;
}
do
{
chsendvalue = 0xF8;
err = SerSend( gSerialRefNum, &chsendvalue, 1, &err );
SerSendWait( gSerialRefNum, -1 );
SerSendFlush(gSerialRefNum);
htext = MemHandleNew( HTEXT_SIZE );
if( htext == NULL )
return false;
ptext = MemHandleLock( htext );
StrPrintF( ptext, "1.%ld", gcount );
MemHandleUnlock( htext );
index = FrmGetObjectIndex( gform, ContactDetailStatusField
);
field = FrmGetObjectPtr( gform, index );
FldSetTextHandle( field, htext );
FldDrawField( field );
gcount++;
}while(true);
}
break;
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