Nintendo Switch Brew

Changes

Joy-Con (view source)

Revision as of 21:30, 29 August 2018

231 bytes added ,  21:30, 29 August 2018
Copy JC pinout information from https://reswitched.tech/hardware/joycon
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==Firmware==
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==Joy-Con Connector Pinout==
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''See also: [[Joy-Con Firmware]]''
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The firmware of the Joy-Cons seems to be generic across all instances. Details such as the handedness of the controller and the color is just indicated in a configuration part of the flash. Judging by quick glance at the firmware, it's probably identical to that used on the Pro Controller as well.
   
{| class="wikitable"
 
{| class="wikitable"
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! Controller || 1.0.0
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! Logic analyzer channel || Joy-Con Connector Pin || Function || Remark
 
|-
 
|-
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| Joy-Con Left (Blue) || [[:File:pad.L.bin|flash dump]]
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| - || 1 || GND || -
 
|-
 
|-
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| Joy-Con Right (Red) || [[:File:pad.R.bin|flash dump]]
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| - || 2 || GND || -
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|-
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| 0 || 3 || BT status? || Only high when connected to console via Bluetooth, low when unpaired, sleeping, or attached to the console directly
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|-
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| 1 || 4 || 5V || Joy-Con power and charging
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|-
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| 2 || 5 || Serial data, console to Joy-Con || Inverted level (idle at GND)
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|-
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| 3 || 6 || Attach status? || GND only when directly attached to console and not sleeping, 1.8V.
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|-
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| - || 7 || GND || -
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|-
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| 4 || 8 || Serial data, Joy-Con to console || Standard level (idle at 1.8V)
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|-
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| 5 || 9 || ? || Always at GND
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|-
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| 6 || 10 || Flow control || Looks like RTS line, Joy-Con will only send data when this line is high.
 
|}
 
|}
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The flash is in a patch-ram format. Tools for dealing with it are available [https://github.com/shuffle2/nxpad].
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A dump of the ROM region (taken while firmware was running) can be found [[:File:bcm20734_rom.bin|here]]. Note this is the same SoC used on the other controller models, as well.
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When first connected the baud rate is at 1000000bps(!), after the initial handshake the speed is then switched to 3125000bps(!!). The handshake probably exchanges information about the side of the Joy-Con, the color, and Bluetooth address etc.
    
== Left & Right Separate Joy-con ==
 
== Left & Right Separate Joy-con ==
Retrieved from "https://switchbrew.org/wiki/Special:MobileDiff/4945"