Tutorial  Updated

Internal modchip - SAMD21 (Trinket M0, Gemma M0, ItsyBitsy M0 Express) Guide, Files & Support

Notice: I am not receiving notifications for this thread. I didn`t realise people were still posting in it.

Please please accept my apologies if I haven`t replied to tags etc... I have no idea what is happening. I`m subscribed to this thread but I am not receiving notifications. Please inbox me if possible. Or tag me in another thread.

Its amazing that people are still checking all of this out. I thank you for all of the help and support I have received in this thread over this year.

Cheers. Matty.


A video showing a modchip in action. Thank you once again to @metaljay for providing this. This is what you can achieve by fitting a chip!



Section 1. Gather your software.

Get your chip software from THIS THREAD.
Follow the flashing instructions there...




Section 2. Removing USB port and unneeded LEDs. (Adafruit chips only)
  • Next, we need to remove the USB port from the modchip. I recommend a heatgun or a rework station. Heat up until the USB port just lifts off the modchip.
  • Do the same for the LED just to the right of the USB port.
See picture:
20181031_110415.jpg


You are now ready to fit your device. Proceed to Fitting section.





Section 3. Fitting modchip to your Switch.
New Universal Method. All SAMD-based internal chips. If your chip is not supported and you cannot work it out, PM me.

Trinket M0.
Solder as laid out in the following picture

trinketfinal.jpg

==================================================
Rebug SwitchME M0. Use Trinket files.
Solder as laid out in the following picture

rebugfinal.jpg

==================================================
RCMX86 - Internal modchip version.
Solder as laid out in the following picture

RCMX86-Internal-Final.jpg


==================================================
Gemma M0. Use Gemma files.
Solder as laid out in the following picture


gemma final.jpg

==================================================
ItsyBitsy M0 Express. Use ItsyBitsy files.
Solder as laid out in the following picture

itsybitsyfinal.jpg




==================================================
Feather M0 Express. Use Feather files.
Solder as laid out in the following picture

feather_final.jpg




BUILD YOUR OWN FROM A QFP ATSAMD21E18. Trinket equivalent pins.
Flash Trinket bootloader using OpenOCD via serial pins SWDIO / SWDCLK. Fit a reset switch somewhere... Or going to power / wake (aka method 2). If building for external use, it is good practice to fit a third capacitor between 3V & GND. This is deliberately vague and ambigious, as this needs research and you need to know what you are doing.

Link for setting the Pi up with OpenOCD: HERE
Raspberry Pi OpenOCD image in downloads section or HERE
SAMD pi connection.png



Alternative Solder Points

Credit to @consolex for original pic. I`ve added alternative points to solder to:
Alternatepoints.jpg


Credit to @pyorin for this much tidier version showing the same info as the above one!
Alternatepoints2.jpg

s-l1600.jpg

alternative3v.jpg




Replacement Parts List

Ok... So you have damaged your switch soldering your chip in. Not to worry.

First things first, DO NOT BRIDGE THE CONTACTS HOPING TO REVIVE YOUR SWITCH. With resistors, you may possibly get away with this, but with the capacitors listed below, if you jump these points, you will make a nice short-circuit to the PMIC and / or the M92T36, killing them instantly. Don`t do it.

OK... I`ll list these parts with METHOD 2 & 3 TRINKET PIN NUMBERS and the values of the components they solder to.

TRINKET 3V (POWER SUPPLY) - 2.2uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 2 (POWER ON RESET - goes to pin 5 on M92T36)- 4.7uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 0 (VOL+) - 150R (150 ohms) 0201 Thick Film resistor. 50mW
TRINKET RESET (SWITCH POWER BUTTON) - 150R (150 ohms) 0201 Thick Film resistor. 50mW


I recommend RS components.

FAQ

Q - How do I boot the switch into APX (RCM) mode?

A - You need to short out pin 10 on the right joycon rail to GND with a jig or modded joycon or paperclip (not recommended... Buy a jig you cheap-ass gyppo). Once shorted out, hold down vol+ and power. The switch screen should be off... Plug into your PC and it should recognise a APX device. Well done. You are in RCM.

Q - What glue should I use?
A - Only glue if necessary! Ideally if your soldering is of sufficient quality and your wire is thin enough, you don`t need glue. I use a bit because I am OCD. Anyway, use Epoxy. It`s what I use. Gives you some working time, is solid. Superglue makes a mess DO NOT USE SUPERGLUE. The only thing super about it is how it melts things. Epoxy won`t stick to the shield long-term, so bear that in mind. Pure Acetone will remove epoxy. Acetone tends to remove / melt anything to be warned. CHECK YOUR GLUE WON`T GO CONDUCTIVE OVER TIME - LOOKING AT YOU SCAMSUNG! The combination of heat cycles and absorbing of moisture can turn adhesive into a high-impedance connection!

Q - What size wire should I use?
A - I use AWG40 magnet wire or AWG30 Kynar. AWG40 goes onto components easier... And if you snap it, chances are the wire will snap and not the trace / component.
A2 - You can also use AWG30. I recommend Kynar wrapping wire but any will do. Looks nice, good resistance to elements, tidy. Nothing thicker than AWG30. You are just causing yourself more headaches. Trust me.

Q - Is AWG40 thick enough?
A - Yes. AWG40 is good for around 90mA.

Q - which methods do you recommend?
A - Connect all the straps...

Q - how do you recommend to set it up?
A - Fusee Suite. Search for Fusee Suite or go to link at top of this OP.

Q - My switch is flat and won't turn on.
A - Have you got the charger connected? Disconnect it or your switch won't boot! Boot to a payload (SX loader/Hekate), reconnect charger and leave on the payload menu and charge. Leave for 15 minutes and switch will start normally. It will continue charging one booted.

Disclaimer:
You have only yourself to blame. This voids warranty. This may or may not get you banned from online services. If it does, you got yourself banned. I`m not responsible if you kill your switch / your first-born with any of this in this post. I`m not infalliable. I`m partly senile. Do your own research. Kids, get bill payers permission before you attempt even using a screwdriver.
NUTSHELL: Don`t come having a go at me because you fooked your £300 console up. I`ll do my best to help you though if you do, Just don`t blame me.

Credits to Quantum-Cross, Atlas44, @Ninoh-FOX , @jcrorxp , @tecfreak, @mooglazer, @subcon959, @64Dp128k, @mikeleuskaldunak, @M-O-B, CTCaer, @evilsperm, @consolex and everyone else for valuable input.


IF YOU REQUIRE SUPPORT, IF YOUR CONSOLE ISN`T WORKING CORRECTLY... PLEASE POST A HIGH RESOLUTION PICTURE OF YOUR INSTALL. You might think it isn`t your soldering, but in all cases with the new methods, it is bad soldering. So, please post a picture.


A BRIEF WARNING - PLEASE READ
THIS MOD IS NOT FOR THE FEINT OF HEART. WE ARE SOLDERING TO TRACES AND COMPONENTS ON THE FRONT SIDE OF THE BOARD TO SAVE HAVING TO REMOVE THE BOARD AND SOLDER TO TESTPOINTS. IF YOU ARE STRUGGLING, OR THINK YOU ARE GOING TO STRUGGLE, PLEASE PLEASE SOLDER TO THE TEST POINTS NOTED IN THIS AND OTHER THREADS (YOU WILL NEED TO REMOVE THE MOTHERBOARD). DOUBLE - TRIPLE CHECK EVERYTHING. YOU HAVE BEEN WARNED!!!
Good soldering skills are needed!
A magnifying glass is needed!
Good soldering iron needed - ideally with a 0.3 conical tip. No more than 30w!
SECURE YOUR WIRES PRIOR TO SOLDERING. Stick them down with double-sided tape.
Only use glue if you need to and glue wires after soldering. Don`t glue the solder to the component!
Put the tiniest amount of glue on the PCB mask only. Never on components. Use a cocktail stick for more glue control!!!
Take a look at alternative solder points to get you out of the sh*t if you do rip something off the board
If you aren`t the best at soldering, then think very carefully about connecting to pin 6 capacitor (the one in these new methods). If you rip this pad, you WILL NEED TO REMOVE YOUR BOARD and run from a testpoint.
 

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ashrocks94

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Desoldered everything. Attached pics.
 

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krackpack

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can some one point me to were you can get info on burning a sam21 bootloader on a fresh chip on a diy rebug switchme. I ordered the boards and part soldered it all up and i cant for the life of me figure it out. i have read the adfruit guide for openocd and installed the image. But i only had a pi3 and didnt no if thats whats wrong but i cant get the samd to show up
 

mattytrog

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every one has a opinion, but to me this is so pointless vs what you get.
Indeed everyone is entitled to an opinion.

Some people like genuine cold-boot CFW without carrying a dildo and a jig around.

Oh well.. Can`t please everybody.

--------------------- MERGED ---------------------------

can some one point me to were you can get info on burning a sam21 bootloader on a fresh chip on a diy rebug switchme. I ordered the boards and part soldered it all up and i cant for the life of me figure it out. i have read the adfruit guide for openocd and installed the image. But i only had a pi3 and didnt no if thats whats wrong but i cant get the samd to show up
How are you connecting it?

Are you using the image from the OP?

--------------------- MERGED ---------------------------

Desoldered everything. Attached pics.
Think its time that came into clinic...
 
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krackpack

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Indeed everyone is entitled to an opinion.

Some people like genuine cold-boot CFW without carrying a dildo and a jig around.

Oh well.. Can`t please everybody.

--------------------- MERGED ---------------------------


How are you connecting it?

Are you using the image from the OP?

--------------------- MERGED ---------------------------


Think its time that came into clinic...

--------------------- MERGED ---------------------------

i got it hooked to the gpio pins i used the wiring diagrams from the same place as the openocd image from the same place i got the image and yes using the one from the op is there something i am missing do i need to hit the reset at a certain time. i go to the folder bootloader/openocdcfgs/trinket/ then run the openocd script ive even tried sudo running it and ive tryed different folders that got a openocd cfg but no luck
 
Last edited by krackpack,

krackpack

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so that was the issue i changed that but now its failed to erase i checked its soldered good i reflow stuff all the time so i know thats not the issue but if you got any ideas
IMG_0814.jpg
 

mattytrog

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Yes. Wires as short as poss... Hit reset just before you press enter on sudo openocd.

Can take multiple attempts. OpenOCD isnt perfect.
 

krackpack

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thanks it worked perfect but since i flashed the trinket bootloader on to the switchme do i use the switch boot 1 files for the trinket or still the rebug files im gonna do both straps and just cant find anywere thats says which one to use if i did the trinket bootloader
 

mattytrog

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thanks it worked perfect but since i flashed the trinket bootloader on to the switchme do i use the switch boot 1 files for the trinket or still the rebug files im gonna do both straps and just cant find anywere thats says which one to use if i did the trinket bootloader

Use the Rebug bootloader... Choose Both or joycon only... Once you have dragged the rebug uf2 over, SWITCHBOOT will open...

Inside a text file will be created. Look what it says... Should say Rebug SwitchME
 

krackpack

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ya it does now i just solder it in the switch i dont need to copy over anyfiles besides the rebug one i just dragged over that made it pop up switchboot
 

grozio

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hello and good day...during this week i will use my first trinketM0 (until now always rcmx86)...it's necessary dissoldering usb port? or can i solder wires also with usb port? thanks everyone...
 

mattytrog

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ya it does now i just solder it in the switch i dont need to copy over anyfiles besides the rebug one i just dragged over that made it pop up switchboot
Yes. You also need the main UF2...

You can use Switchboot Part 2. Drag that over as well to flash the main memory.

Flashing complete.
 

efxonly123

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@efxonly123 View attachment 165161

Still on test. Not everything tested yet. M92T36 area completely rebuilt with new passives 7 or 8 resistors & caps were damaged. Others I wasn`t too sure about.

Not plugged speakers in yet or anything... Just thought I`d show you it running.

Mattytrog, thank you so much. I never thought that Switch would work ever after the damage I did to it. You truly are amazing. I sent you a PM.
 
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ashrocks94

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Indeed everyone is entitled to an opinion.

Some people like genuine cold-boot CFW without carrying a dildo and a jig around.

Oh well.. Can`t please everybody.

--------------------- MERGED ---------------------------


How are you connecting it?

Are you using the image from the OP?

--------------------- MERGED ---------------------------


Think its time that came into clinic...


Yeah I think it's time too haha, so how do I go about sending this to you? Could I possibly just send you the mobo? I ordered a fresh mobo on ebay (patched unfortunately) so I can play some smash.
 

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