[Thumbgps-devel] USB handshake signals and Linux

[Patrick Maupin]

On Wed, Mar 14, 2012 at 1:42 PM, Eric S. Raymond <esr at thyrsus.com> wrote:

> I found a couple of hits on the search "PL2303 latency timer" that
> implies it has one too.  But I doubt the value of the latency timer
> will be relevant for handshake-line notifications; see below.

The latency timer on the FTDI parts can be dropped to a millisecond.
If we find a USB dongle that has a USB converter with similar
capabilities and a GPS chipset that has rock-solid first-character
timing, we might avoid needing the RS232 handshake altogether.

(We might need to drop the baud rate to avoid losing data, but that's
not a huge deal.)