MIGRATED

this repo has been combined into asottile/nintendo-microcontrollers

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3ds-microcontroller

setup

on ubuntu I needed the following packages:

sudo apt install arduino-core-avr avr-libc avrdude gcc-avr

configure

set AVRDIR in the makefile if yours is different

set VARIANT in the makefile if yours is different. hint:

ls /usr/share/arduino/hardware/arduino/avr/variants/

build

make -j5

flashing

you have to be quick with this!

• connect the pro micro to your computer
• short rst to gnd twice in quick succession

sudo avrdude -v -patmega32u4 -cavr109 -P/dev/ttyACM0 -Uflash:w:main.hex

use the appropriate MCU and serial port for your board, the pro micro uses atmega32u4 and /dev/ttyACM0

parts

for disassembly I followed this guide for 3ds disassembly carefull with:

• JIS screwdrivers (don't use phillips!)
• precision tweezers
• [spudgers and opening tools]

for my assembly I used:

• pro micro
• 74LVC245 level shifter (I had 0 luck with the TXS0108E)
• 32 AWG magnet wire

3ds testpoints

these are the ones I soldered to

TP1   GND
TP5   +1.8V
TP89  A
TP92  B
TP86  X
TP88  Y
TP85  up
TP87  left
TP91  down
TP90  right
TP83  L
TP82  R
TP80  start
TP81  select
TP55  home  # for next time

wiring diagram

it's quite difficult to see all of the wiring from the photo but here are the connections:

• +1.8V from the 3ds connects to DIR, Vcc on the 74LVC245
• GND from the 3ds is tied to GND from the microcontroller. this is also tied to GND and OE on the 74LVC245
• digital output pins from the microcontroller are connected to A# pins on the 74LVC245
• leads to the corresponding testpoints are connected to the B# pins
• the datasheet recommends connecting unused 74LVC245 pins to GND