Hi,

My VFP6 written application is using MSCOMM control for communicating with a external device running at 14400,N,8,1 parameter.

When I expect some large return of inbuffer like 89 bytes in size, I always miss out the
ETX character.

But this does not happened when the return of inbuffer is around 50 bytes in size.
Below are part of my code.

Why, any one can assist or advise me. Thank you


FUNCTION OpenPort
WITH THISFORM.MSCOMM

.Settings='14400,N,8,1'
.OutbufferSize=512
.InBufferSize=1024
.Handshaking=1 * Xon/Xoff handshaking
.PortOpen = .T.

.RThreshold = 1
.InputLen = 0
.InBufferCount = 0
.OutBufferCount = 0

ENDWITH
ENDFUNC


OnComm Events
IF THIS.InbufferCount >= 1

cChar = ""
cChar = THIS.INPUT

IF cChar $ CHR(3)
WFile("ETX detected")
ENDIF

THISFORM.cBuffer = THISFORM.cBuffer + cChar

THISFORM.WFile("Buffer = "+THISFORM.CBuffer+", Len = "+ALLT(STR(LEN(THISFORM.CBuffer))))

ENDIF