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

taxco · Dec 24, 2022

binkinator said:
I was going to say no, but then I read this!

https://github.com/mattytrog/FUSEE_SUITE#glossary-of-terms-used-in-this-document

thx, failsafe is better.

i tried all 3 boot priority setting, but non works.
see my settings.

Post automatically merged: Dec 24, 2022

taxco said:
thx, failsafe is better.

i tried all 3 boot priority setting, but non works.
see my settings.

Another few hours later, messing with it.
I think you always need VOL+ strap.
The priority setting is what trinket should first load when power btn is pressen ( vol+ strap connected )

Post automatically merged: Dec 24, 2022

binkinator said:
E: I might be wrong about the Vol(+) and ability to autoboot CFW.

…from the README:

~~Vol(+) is not absolutely required to do this~~. not sure about this after reading the above statement

The latest V9 software is only supported via the docs @mattytrog has kindly provided on GitHub. Most folks here will not likely have installed it as the earlier versions just work. Of that subset of people, even fewer will have done it without the Vol(+) button.

latest software, limited user base, limited support and without the configure strap = you are doing this one on hard mod.

Since you are not installing Vol(+) you will need to pre-load all you settings in advance.

I’ve done extensive research into how to do this with V6/7 but have not looked into the new V9 series. It does look similar but there are some new terms I’ve not played with.

Fortunately the instructions on how to do this for V9 are located here:

https://github.com/mattytrog/FUSEE_SUITE/tree/master/Fusee-Suite/SETTINGS_UF2

Did you write this, about the V9 and extensive research into how to do this with V6/7.
If you know how i can do it using V7, permanent CFW with out the VOL+. plz tell me.

Update!
Got tired of searching and i installed the strap Vol+, now its boots to cff with the power btn.
Strap VOL+ is needed for permanent cfw.

taxco · Dec 25, 2022

One thing.
The standard TRINKET.UF2 is FailRCM set default.?

binkinator · Dec 25, 2022

taxco said:
thx, failsafe is better.

i tried all 3 boot priority setting, but non works.
see my settings.

Post automatically merged: Dec 24, 2022

Another few hours later, messing with it.
I think you always need VOL+ strap.
The priority setting is what trinket should first load when power btn is pressen ( vol+ strap connected )

Post automatically merged: Dec 24, 2022

Did you write this, about the V9 and extensive research into how to do this with V6/7.
If you know how i can do it using V7, permanent CFW with out the VOL+. plz tell me.

Update!
Got tired of searching and i installed the strap Vol+, now its boots to cff with the power btn.
Strap VOL+ is needed for permanent cfw.

So VERY glad you soldered the Vol(+) strap in. It’s not required in general but for what you wanted to do specifically, it is required.

taxco said:
One thing.
The standard TRINKET.UF2 is FailRCM set default.?

Unfortunately @mattytrog is not here to tell us what he did so you’ll have to reverse engineer it to find out. You might be able to compare the default trinket.uf2 and a blank.uf2 using a hex editor. There will most likely be a section that matches the pattern of settings style hex digits in the trinket.uf2 file.

taxco · Dec 26, 2022

binkinator said:
So VERY glad you soldered the Vol(+) strap in. It’s not required in general but for what you wanted to do specifically, it is required.

Unfortunately @mattytrog is not here to tell us what he did so you’ll have to reverse engineer it to find out. You might be able to compare the default trinket.uf2 and a blank.uf2 using a hex editor. There will most likely be a section that matches the pattern of settings style hex digits in the trinket.uf2 file.

Oke thx

Deleted member 627909 · Jan 9, 2023

Has anyone installed the seedstudio Xiao samd21? I put one in last night but noticed the green and amber LEDs stay on and no real activity was shown as far as injection on any led. I have removed them for now so I do not vampire the battery. I lost 3% of battery over 6 hours in sleep mode as a test. I believe this is considered normal.

poughstings · Jan 10, 2023

Is following thia guide/diagram okay for this version of the rcm x86 I got

Hayato213 · Jan 10, 2023

poughstings said:
Is following thia guide/diagram okay for this version of the rcm x86 I gotView attachment 346878

Should work fine, as it is a RCM X86

c3swotex · Jan 12, 2023

after i installed trinket m0 my console gets hot near joy con near cpu/gpu any idea and how to fix it would be great

Hayato213 · Jan 12, 2023

c3swotex said:
after i installed trinket m0 my console gets hot near joy con near cpu/gpu any idea and how to fix it would be great

Did you put thermal paste around the heatsink, is the fan working?

Anomaly_XB-6783746 · Feb 6, 2023

I did the trinket install with mostly the alternate points on the back but now my switch won't turn on. Whenever I press the power button, the RGB led on the trinket just quickly blinks green one time and then nothing happens, the screen just stays black.. I paid attention to not bridge anything etc so I am really clueless what went wrong.

Does any of you have some tips on how to start troubleshooting?

Hayato213 · Feb 6, 2023

Anomaly_XB-6783746 said:
I did the trinket install with mostly the alternate points on the back but now my switch won't turn on. Whenever I press the power button, the RGB led on the trinket just quickly blinks green one time and then nothing happens, the screen just stays black.. I paid attention to not bridge anything etc so I am really clueless what went wrong.

Does any of you have some tips on how to start troubleshooting?

Post pictures of your soldering.

Anomaly_XB-6783746 · Feb 6, 2023

Currently only possible to take a picture of the front as I have to remove the PCB again.. Will post it later once I had the time for it.

What I also noticed is after I turn on the console and the screen stays black, the LED of the trinket blinks red whenever I press the VOL+ button

binkinator · Feb 6, 2023

Anomaly_XB-6783746 said:
Currently only possible to take a picture of the front as I have to remove the PCB again.. Will post it later once I had the time for it.

View attachment 351486

What I also noticed is after I turn on the console and the screen stays black, the LED of the trinket blinks red whenever I press the VOL+ button

Something is shorted. Visually inspect (again), especially around the (Vol +) wire area. Look for splatter that you might have missed outside just the one joint.

I would start by removing the wires from the trinket side one at a time until you can get it to power back on by itself. I would start with the (Vol +) wire then power (+) and then (gnd). Hopefully it’s one of these three and you won’t have to undo everything. Be sure to test after each wire removal so you know which one “fixes” things.

Anomaly_XB-6783746 · Feb 6, 2023

binkinator said:
Something is shorted. Visually inspect (again), especially around the (Vol +) wire area. Look for splatter that you might have missed outside just the one joint.

I would start by removing the wires from the trinket side one at a time until you can get it to power back on by itself. I would start with the (Vol +) wire then power (+) and then (gnd). Hopefully it’s one of these three and you won’t have to undo everything. Be sure to test after each wire removal so you know which one “fixes” things.

Ok thank you, I will try that and report back

binkinator · Feb 6, 2023

Anomaly_XB-6783746 said:
Ok thank you, I will try that and report back

Oh…also look for components you might have singed with your iron just to the side of where you were working. I fried a chip resting my iron on it while I worked.

…also look for components you might have completely knocked off. It happens! Shit’s tiny yo!

Anomaly_XB-6783746 · Feb 6, 2023

binkinator said:
Something is shorted. Visually inspect (again), especially around the (Vol +) wire area. Look for splatter that you might have missed outside just the one joint.

I would start by removing the wires from the trinket side one at a time until you can get it to power back on by itself. I would start with the (Vol +) wire then power (+) and then (gnd). Hopefully it’s one of these three and you won’t have to undo everything. Be sure to test after each wire removal so you know which one “fixes” things.

Okay so I did now check for shortings but was not able to find one. But what I found was the ground connection being loose. With this fixed, the only thing which improved is that there now is backlight (see picture one) but the screen stills stays black..
Also does not look like there is some fried component.

On picture two you can see a ribbon cable which does not fit 100% in the connector because of two wires, but it looks like all the contacts still are connected, so I am also not sure if this is related.

binkinator · Feb 6, 2023

Anomaly_XB-6783746 said:
Okay so I did now check for shortings but was not able to find one. But what I found was the ground connection being loose. With this fixed, the only thing which improved is that there now is backlight (see picture one) but the screen stills stays black..
Also does not look like there is some fried component.

Great. One less thing to hunt down in the future.

Anomaly_XB-6783746 said:
On picture two you can see a ribbon cable which does not fit 100% in the connector because of two wires, but it looks like all the contacts still are connected, so I am also not sure if this is related.

I pulled mine through on that space closer to the fan. See the gap over to the right?

At some point you’re going to have to undo;dee somethings, hopefully on just the Trinket, but maybe on the mobo side as well?

Hayato213 · Feb 6, 2023

Anomaly_XB-6783746 said:
Okay so I did now check for shortings but was not able to find one. But what I found was the ground connection being loose. With this fixed, the only thing which improved is that there now is backlight (see picture one) but the screen stills stays black..
Also does not look like there is some fried component.

On picture two you can see a ribbon cable which does not fit 100% in the connector because of two wires, but it looks like all the contacts still are connected, so I am also not sure if this is related.

Most people don't do alternate point for the trinket, it work better the shorter the wires, also reseat your ribbon cable.

Anomaly_XB-6783746 · Feb 6, 2023

binkinator said:
Great. One less thing to hunt down in the future.

I pulled mine through on that space closer to the fan. See the ga- over to the right?

At some point you’re going to have to undo;dee somethings, hopefully on just the Trinket, but maybe on the mobo side as well?

I think I will start with rerouting 3v and usb disconnect (red,yellow) to the gap you mentioned so the ribbon cable perfectly fits again. Maybe I should also use thinner wires

binkinator · Feb 6, 2023

Anomaly_XB-6783746 said:
I think I will start with rerouting 3v and usb disconnect (red,yellow) to the gap you mentioned so the ribbon cable perfectly fits again. Maybe I should also use thinner wires

Make sure you test booting in between every wire you remove. We don’t know which one might be causing the issues. Leave them disconnected and keep trying to reboot. Don’t start wiring back up until it boots cleanly.

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