> > slippyr4 wrote 2011-10-17 13:48:
> >> Now, the problem: when i connect my circuit to a (generic, chinese
> >> made,prolific chipset) USB->Serial converter, after a couple of minute=
s
> >> of
> >> successful data streaming, the data seem to become corrupt. As in, the
> >> actual data received on the port is garbage. How long before this happ=
ens
> >> is
> >> variable.
>=20
> Are you sending absolutely continously at 57600? IE: With one character
> immediately after the other for many, many characters?
>=20
> If you are, then differences in baud clocks on your board and the adapter
> (the adapter is likely to be further out than your clock) may be causing
> 'slippage' resulting in a misalignment between the two devices idea of wh=
ere
> a character begins. This is only possible if the adapter is looking for a
> full length stop bit, which *would* be a stupid design on their part.
>=20
> As a test, you could modify your code to send two stop bits (but leave th=
e
> windows side programmed for one stop bit) and see if the problem goes awa=
y.

That was my first thought too, although the other thought I have had is tha=
t he is running with BRGH =3D 1, which on a number of PICs causes problems.=
 I don't know if this particular PIC is one that has problems with BRGH =3D=
 1, or if it is chip revision dependant.


--=20
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