Hacking COMPLETED BASIC MODCHIP / DONGLE UF2 SD BOOT FILES. Trinket / Rebug / RCMX86 / Others

mattytrog · Dec 9, 2018

snam11 said:
Actually if i can find a led (and if you can tell me where to fit it) from a spare pcb, i'm happy to help.
Any prticular specs on the led Or any kind is good?

Any 20mW LED. Most are.

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@MeteK
Especially for you lol

2-mode, 2 payload version.

Payload 1 - Atmosphere 0.8.2
Payload 2 - Hekate 4.5 customized (makes a 0 folder with all payload entries ready there.

Mode 1 - Stays on payload no matter what
Mode 2 - Alternates between payloads on every failed "push" for example, if you are booted into Horizon.
Set on mode 1, payload 1 (Atmosphere) at the moment.

Not tested it, but should be all good.Trinket / Rebug...

MeteK · Dec 9, 2018

Amazing, you're the man ! Thank you !

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Got this error, everything is ok my SD

[EDIT] Ok, secondary.bin must be inside the Atmo folder, not @ SD root anymore... works great !

Javan · Dec 11, 2018

Hello. The UF2 files fail to flash on my R4S dongle, the led flashing red. May I ask for some help?

mattytrog · Dec 11, 2018

Javan said:
Hello. The UF2 files fail to flash on my R4S dongle, the led flashing red. May I ask for some help?

Certainly. Are you getting your UF2 drive up?

Javan · Dec 11, 2018

mattytrog said:
Certainly. Are you getting your UF2 drive up?

I'm sorry, I didn't understand the question.

mattytrog · Dec 11, 2018

Javan said:
I'm sorry, I didn't understand the question.

OK... Plug your dongle into PC. Double-press reset. Does a drive open?

Javan · Dec 11, 2018

mattytrog said:
OK... Plug your dongle into PC. Double-press reset. Does a drive open?

Ah, that's what you meant. Yes, it's opening as normal.
I can confirm that it also flashes the original payload from the R4S without any trouble, just in case that's relevant.

mattytrog · Dec 11, 2018

Javan said:
Ah, that's what you meant. Yes, it's opening as normal.
I can confirm that it also flashes the original payload from the R4S without any trouble, just in case that's relevant.

Just tried it. Goes on fine this end. How are you flashing it?

Drag and dropping the UF2 to the drive? You do have a CURRENT.UF2 in there don`t you?

Javan · Dec 11, 2018

mattytrog said:
Just tried it. Goes on fine this end. How are you flashing it?

Drag and dropping the UF2 to the drive? You do have a CURRENT.UF2 in there don`t you?

Yes, it has a CURRENT.UF2. It also has a INDEX.HTM that redirects to the R4S site and a INFO_UF2.TXT with the following contents:

Code:

UF2 Bootloader v2.0.0-adafruit.5-dirty SFHWRO
Model: RCM_DONGLE
Board-ID: SAMD21E18A-RCMD-v0

mattytrog · Dec 11, 2018

Javan said:
Yes, it has a CURRENT.UF2. It also has a INDEX.HTM that redirects to the R4S site and a INFO_UF2.TXT with the following contents:

Code:

UF2 Bootloader v2.0.0-adafruit.5-dirty SFHWRO Model: RCM_DONGLE Board-ID: SAMD21E18A-RCMD-v0

Which file are you trying to put on?

Javan · Dec 11, 2018

mattytrog said:
Which file are you trying to put on?

4918_R4S_mode1.UF2 from the UF2/R4S folder from the github.
I tried the mode2 UF2 as well, just in case it did anything else. Failed.

mattytrog · Dec 11, 2018

What errors are you getting?

Do you have any software interefering with USB? ie VMware / virtualbox?

It should drag and flash itself.

Javan · Dec 11, 2018

Drag and flash works perfectly with the UF2 files from the official R4S site.
About software interfering with flashing, I am running on Linux, but that shouldn't be interfering with anything. Specially considering I can flash the official files without a problem.
But for the sake of thoroughness, I am going to do a cold boot into a kernel with virtualization opts off and try again.

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Sorry for the double-post, but the result from the cold boot is the same. Drag, flash, blinking red led.

mattytrog · Dec 11, 2018

ok. this requires investigation. Leave it with me.

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where are you getting your files from? The working ones?

I`m thinking your dongles flash size is different.

Javan · Dec 11, 2018

I am getting those from the official site for the R4S dongle, r4i-sdhc dot com.
And at least for the size of the UF2 files, yours and the official ones are the same size: 524.3 kB (524,288 bytes).

mattytrog · Dec 11, 2018

Javan said:
I am getting those from the official site for the R4S dongle, r4i-sdhc dot com.
And at least for the size of the UF2 files, yours and the official ones are the same size: 524.3 kB (524,288 bytes).

Ok. Thanks for letting me know. Working on it as we speak.

mattytrog · Dec 12, 2018

OK... If someone wants to try this...

https://github.com/mattytrog/Basic-Modchip-UF2/blob/master/UF2/Trinket_Rebug.UF2?raw=true

This is my new "basic UF2" for people who want no pissing around.

Other boards updated tomorrow pending feedback. Trinket & Rebug only at the minute. Source on my git.

With this UF2:

Your Trinket / Rebug will look for "payload.bin" OR "start.bin" in SD root and launch automagically.
0 folder not needed
nx files not needed
No folders will be made
If "payload.bin" or "start.bin" is not found, Hekate 4.5 will launch.
This is meant for people who don`t want to be pissing around with folders / nx files / etc etc

Gismor · Dec 12, 2018

okay bad news

have flash this single file on my rebug.
have try without any file to boot with volume + and power and hektate is not coming the switch boot into normal horizon os.
have try with start.bin in the root directory of the sd card and boot with volume + and power and same result boot into horizon

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but i dont understand why works only the older chainloader files and not the newer chainloader files on my switch?
must i update the bootloader? or it dosent matter which version is installed from the bootloader?

mattytrog · Dec 12, 2018

Gismor said:
okay bad news
have flash this single file on my rebug.
have try without any file to boot with volume + and power and hektate is not coming the switch boot into normal horizon os.
have try with start.bin in the root directory of the sd card and boot with volume + and power and same result boot into horizon

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but i dont understand why works only the older chainloader files and not the newer chainloader files on my switch?
must i update the bootloader? or it dosent matter which version is installed from the bootloader?

There shouldn't be a reason.

Every switch I have done, I test with both version 1 (joycon) and version 2 (both straps). I've tested with trinkets, Gemmas, itsys and I cannot find a problem.

I think we need to go to the top and start again.

Gismor · Dec 12, 2018

mattytrog said:
There shouldn't be a reason.

Every switch I have done, I test with both version 1 (joycon) and version 2 (both straps). I've tested with trinkets, Gemmas, itsys and I cannot find a problem.

I think we need to go to the top and start again.

Okay what can i do xD
i can all try

Hacking COMPLETED BASIC MODCHIP / DONGLE UF2 SD BOOT FILES. Trinket / Rebug / RCMX86 / Others

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