VMµ Project Log

Forum thread for discussion: https://sudomod.com/forum/viewtopic.php?f=13&t=5073

A couple things I forgot to mention this in the video:

The way the screen-flipping works is GPIO number 17 on the Pi is connected to one of the VMU connector pins. The corresponding pin in the controller is connected to ground. When the VMU turns on, a Python script runs that checks to see whether or not it’s plugged in. If it is, it updates the screen configuration to rotate the image. It increases the boot time a little if it needs to rotate it, but it’s nice and simple and works great. 🙂

The base RetroPie image I used is from the mintyPi, so it has HoolyHoo’s shortcut scripts (which I modified a bit for my this project) included for adjusting the volume/brightness (the the “Sleep”/Start button on the VMU is also the function button).

Here’s the RetroPie image: http://www.mediafire.com/file/nw8fggfvxvxmf1s/vmu.img.zip

Here is the Arduino code used in the controller (a modified version of the code I helped write for Helder’s AIO board): http://www.mediafire.com/file/uul8gd66w2v1hql/DC_Controller.zip

Here’s the STL file for the bracket I made: http://www.mediafire.com/file/0zc9cv2ejh9kvmi/vmu_bracket_microlipo.stl.zip

Parts list:

Screen pinout (pin number 1 is on bottom as shown above):

Screen	Label	Pi
1	VCC	3.3V
2	VCC	3.3V
3	SDA	10
4	AO	24
5	CS	8
6	SCK	11
8	RST	25
9	LED	13
10	GND	GND

VMU PCB pins (from left to right as shown above, starting with the 4th from the left)

Label	Pi
Sleep	26
Mode	15
B	16
A	20
Right	22
Left	14
Down	5
Up	4
GND (rightmost pin)	GND
L (tactile switch)	12
R (tactile switch)	6

DC Controller (“Potato Chip”)

Label	Potato Chip	Arduino
Up	48	6
Down	49	2
Left	50	3
Right	51	4
A	52	5
B	44	8
X	36	10
Y	35	9
L	64	A2
R	1	A3
Start	47	7
Stick-X	62	A0
Stick-Y	63	A1
5V	34	VCC
GND	2,3,4	GND
Select (tactile switch)	N/A	15