From 58b9b22670c2c36e8502826349d8f752d8b3ab37 Mon Sep 17 00:00:00 2001 From: Luca Date: Sun, 23 Sep 2018 22:49:17 +0200 Subject: [PATCH] Circuitry sample for PS/2 Mouse (#3959) Added a sample circuitry for handling the connection of a PS/2 Mouse. Even if it's written that a circuitry is needed, there're a lot of other things and the information gets lost really fast. A really simple sample helps to remember who wants to implement the functionality about the circuitry. --- docs/feature_ps2_mouse.md | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/docs/feature_ps2_mouse.md b/docs/feature_ps2_mouse.md index 909406e7d..01e2cc63d 100644 --- a/docs/feature_ps2_mouse.md +++ b/docs/feature_ps2_mouse.md @@ -6,6 +6,24 @@ To hook up a Trackpoint, you need to obtain a Trackpoint module (i.e. harvest fr There are three available modes for hooking up PS/2 devices: USART (best), interrupts (better) or busywait (not recommended). +### The Cirtuitry between Trackpoint and Controller + +To get the things working, a 4.7K drag is needed between the two lines DATA and CLK and the line 5+. + +``` + + DATA ----------+--------- PIN + | + 4.7K + | +MODULE 5+ --------+--+--------- PWR CONTROLLER + | + 4.7K + | + CLK ------+------------ PIN +``` + + ### Busywait Version Note: This is not recommended, you may encounter jerky movement or unsent inputs. Please use interrupt or USART version if possible.