Hi all,
I have a problem with reading a database (PDB file) on a Palm and sending
these datas from the Palm to a device on the serial port. I included part of
the code below. More precisely, what happens is that I read the records of a
database on the Palm, and I send the datas on the serial port.
To find me problem I opened HyperTerminal and I captured the text. What I
found is that all the datas are sent and captured, but some datas are copied
twice. For example, at positions 0x9B, 0x9C, 0x9D, I'm supposed to have the
following datas: 0x18, 0x70, 0xE0, but, I have 0x18, 0x70, 0x70, 0xE0.
As you can see below, datas are copied from variable resP to pDatas. I
verified with the debugger and the datas are ok, there are no datas copied
twice. The for loop is to read all the records (there are 387 records). The
MemHandleNew(1000) is to allow 1000 bytes of memory (each record is 1000
bytes).
Would anyone have any advice?
Thank you!
Dominique Martel
UInt16 uiSerialPort;
LocalID DBID;
DmOpenRef DB;
char DBName[] = "001-VMB002-1";
MemHandle mHandle;
CharPtr pDatas;
VoidHand resH;
CharPtr resP;
UInt16 uiPos = 0;
UInt32 uiSize = 0;
UInt32 nDataSent;
DBID = DmFindDatabase(0, "001-VMB002-1");
if (!DBID)
return;
DB = DmOpenDatabase(0, DBID, dmModeReadOnly);;
if (!DB) // DB does not exists
return;
mHandle = MemHandleNew(1000);
for (uiPos = 0; uiPos < 387; uiPos++)
{
pDatas = MemHandleLock(mHandle);
if (!pDatas)
return;
resH = DmGetRecord(DB, uiPos);
resP = MemHandleLock(resH);
uiSize = MemHandleSize(resH);
MemMove(pDatas, resP, uiSize);
SerReceiveFlush(m_uiSerialPortId, 0);
nDataSent = SerSend(m_uiSerialPortId, pDatas, uiSize, &err);
if (err)
return;
MemHandleUnlock(mHandle);
MemHandleUnlock(resH);
DmReleaseRecord(DB, uiPos, true);
}//end for
MemHandleFree(mHandle);
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