Hacking Hardware Picofly - a HWFLY switch modchip

[rehius]

What is the reason why the LED does not flash after Zero brushes the 2.6 firmware?

board detection failed. you can try soldering into console (it is safe), if still no LED light, you can set RGB jumper - this forces rp2040-zero board, but colors might be reversed.

I am still working on a safe board detection method. don't want to make many .uf2 for different boards

 

[Kiuxn]

NOT tested, so NOT putting into the main post (will be updated once I test everything).

no guarantees, use at your own risk.
for those who can't wait

!!!!PINOUT!!!! (resistors / mosfets are still required)

Common GPIO for all boards:
CMD => 28
CLK => 27
RST => 26

Waveshare 2040-zero / 2040-one (default, floating pins 29, 11, 16):
DAT => 29
CPU => 15

Raspberry Pi Pico (detected by thermal sensor on pin 29):
DAT => 22
CPU => 21

XIAO2040 (detected by LED power on pin 11):
DAT => 29
CPU => 6

Adafruit ItsyBitsy (detected by LED power on pin 16):
DAT => 29
CPU => 24

ChangeLog:
- fixed regulator setup
- firmware update feature (+ rollback to backup in case of non-working fw update)
- multiple boards support (no idea if that works, magic, ensure LED blinks after write! that means detection worked fine!!)
- extended OFW support, should not break BOOT0 anymore, OFW BCT is copied into the unused space

P.S. I need some rest.

The LED light does not flash after zero brushing 2.6, including starting switch

Post automatically merged: Apr 5, 2023

board detection failed. you can try soldering into console (it is safe), if still no LED light, you can set RGB jumper - this forces rp2040-zero board, but colors might be reversed.

I am still working on a safe board detection method. don't want to make many .uf2 for different boards

Thank you

 

[rehius]

I'll try other ways to detect xiao2040 / itsybitsy later today. Pi Pico detection should be already OK

for now if you don't see LED on WS board, set RGB jumper.

 

[Dee87]

Well guys
i set the permanant dat0 yesterday night
View attachment 2022_0213_083124_009.JPG

after i woke up and got a coffe i decided to reball the oled emmc
View attachment 2022_0213_084351_011.JPG

View attachment 2022_0213_191834_003.JPG

then it came to the part where i was a little bit afraid of :-( reflowing the emmc

well after i but everything back together it i had to take the chance and guess what

everything worked out fine
right now im making a buckup of everything :-)

thanks for the tipps with the reballing :-)
@rehius

@LogicalMadness

@deeps

@Donnie-Burger

and Everybody Else :-)

 

[froggestspirit]

Are 51 ohm resistors fine to use in place of 47?

 

[doom95]

yes

 

[Verity]

Hello, I was able to successfully mod a V2 switch with picofly, I used irlhs6242 mosfet as it was the only one I had on hand close enough to 8342, works perfectly.

 

[Kiuxn]

Is there a stable way to use a mosfet?

 

[Adran_Marit]

Is there a stable way to use a mosfet?

Get the flex

 

[FlowerFire]

Are WS RP2040 and AliExpress RP2040 to be treated as the same, with the last firmware?

 

[Phantomas77]

Well guys
i set the permanant dat0 yesterday night
View attachment 363148

after i woke up and got a coffe i decided to reball the oled emmc
View attachment 363149

View attachment 363150

then it came to the part where i was a little bit afraid of :-( reflowing the emmc
View attachment 363151

well after i but everything back together it i had to take the chance and guess what

View attachment 363153

everything worked out fine
right now im making a buckup of everything :-)

thanks for the tipps with the reballing :-)
@rehius

@LogicalMadness

@deeps

@Donnie-Burger

and Everybody Else :-)

Great work!
I'm having the idea to try to reball the eMMC as well, didn't get the courage yet
Did you have trouble while detaching the chip from the stencil after reflowing the solder paste? And what were the temperatures used in all the steps?
Thanks!

 

[MinatoMuh]

now that we have seeed xiao support, has anybody tried if it fits somewhere on the board without removing the type-c port? i have seen someone in this topic fitting rp2040 zero underside of the trigger with cutting some part. would xiao fit there without cutting?

 

[infopcgood]

guys i discovered this today and ordered these parts, should I order something else?

• 0805 SMD 47R
• Waveshare RP2040-One
• Hwfly Lite curved cable

 

[R-Couto]

Good afternoon everyone, my switch is in V 16.0 can I put the RP2040 on it?

 

[Hayato213]

@R-Couto English please.

 

[FlowerFire]

guys i discovered this today and ordered these parts, should I order something else?

• 0805 SMD 47R
• Waveshare RP2040-One
• Hwfly Lite curved cable

You're gonna need:
- Of course some wire, usually 0.2 enameled wire is the suggested type
- Thermal paste to replace the one you'll have to take off
- Kapton tape to keep the RP2040 in place and avoid shorts

I think you already have a soldering iron and solder

 

[infopcgood]

You're gonna need:
- Of course some wire, usually 0.2 enameled wire is the suggested type
- Thermal paste to replace the one you'll have to take off
- Kapton tape to keep the RP2040 in place and avoid shorts

I think you already have a soldering iron and solder

yeah I have all of those

 

[detilmalala]

hi, i will try today my first switch, just a question, does fw 2.6 still needs the unlock?

 

[rehius]

hi, i will try today my first switch, just a question, does fw 2.6 still needs the unlock?

no. the protection is removed. just bare firmware

 

[jkyoho]

just a quick FYI here, I had my rp2040-ONE successful boots to new logo V2.6 bl and I switched back to rp2040-zero which was on v2.5, BUT when It boots, the zero board also shows me v2.6 new logo surprisingly. I then bridge PIN0 & PIN1 reset zero board and it rolls back to v2.5 "NO SD" screen as promised.
Wondering if v2.6 somehow remains on sysnand at temp or not