Sansa E200 button interface v0.2

by MrH 2006


Buttons are connected to GPIOs like this


button		port	pin	active
------------------------------------------
up (play)	F	5	0
down		F	1	0
left		F	3	0
right		F	2	0
center		F	4	0

rec		F	0	0
power		F	6	1
hold		F	7	1


The scrollwheel is connected to GPIO port H
pins 7 and 6 (set as input).

Rotating clockwise		01 -> 00 -> 10 -> 11
Rotating counter-clockwise	11 -> 10 -> 00 -> 01