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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.
This commit is contained in:
Luca 2018-09-23 22:49:17 +02:00 committed by Drashna Jaelre
parent 57ec309d3e
commit 58b9b22670
1 changed files with 18 additions and 0 deletions
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18
docs/feature_ps2_mouse.md
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@ -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). 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 ### Busywait Version
Note: This is not recommended, you may encounter jerky movement or unsent inputs. Please use interrupt or USART version if possible. Note: This is not recommended, you may encounter jerky movement or unsent inputs. Please use interrupt or USART version if possible.