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Updated the comments on the timings of the original Suunto interface.

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This commit is contained in:
Jef Driesen 2008-01-02 12:01:39 +00:00
parent bc229099af
commit 8b52082a2f
1 changed files with 5 additions and 3 deletions
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8
suunto_vyper.c
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@ -225,9 +225,11 @@ suunto_vyper_send (vyper *device, const unsigned char command[], unsigned int cs
// the data transfer will fail. Timing is also critical here! We have to
// wait at least until the echo appears (40ms), but not until the reply
// from the dive computer appears (600ms).
// The original suunto interface does not have this problem, because it
// does not send an echo and the RTS switching makes it impossible to
// receive the reply too early here.
// The original suunto interface does not have this problem, because it
// does not send an echo and the RTS switching makes it impossible to
// receive the reply before RTS is cleared. We have to wait some time
// before clearing RTS (around 30ms). But if we wait too long (> 500ms),
// the reply disappears again.
serial_sleep (200);
serial_flush (device->port, SERIAL_QUEUE_INPUT);