Hacking Hardware Picofly - a HWFLY switch modchip

[A-Hacked-Soul]

About at my limit of patience, I get the blue light then a yellowish orange light which should be Dat0 but everything seems to check out. Unsolder everything and it boots fine still.

 

[SQc04]

Great work. Can I ask, are you using P mosfets on these?
Is there any reason/benefit in doing so?
Thanks

no no no, the mosfet is n mosfet,model is GSMDC3908Z

Post automatically merged: May 4, 2023

No problem.
To be honest I don't know. It seems that sometimes (for reasons unknown to me) one mosfet does not work.
I've only done 2 switches (both V2) with pico, and both of them worked with one mosfet (1st one with irf8714 the other one with irfsh8342).
Use good wire, keep the length of the wire to minimum and solder good joints and I'm 99% sure it will work with one.

There is not enough current, and the MOSFET needs to handle a large current,

 

[BlownUpTurtle]

LOL what?

looks like Waveshare made a new "dev board" with detachable USB, resistors (47 ohm?) on pins 27, 28, 29, and "custom jumpers" on pins 24, 25.
https://www.waveshare.net/shop/RP2040-Tiny-Kit.htm

Hopefully these won’t take too long to show up on AliExpress

 

[SQc04]

no no no, the mosfet is n mosfet,model is GSMDC3908Z
View attachment 368793

Post automatically merged: May 4, 2023

There is not enough current, and the MOSFET needs to handle a large current,

 

[abal1000x]

.

 

[leerz]

Yes, but its more difficult to solder 2smd series, rather than just use one smd.

I think D0 is not relevant on purple error color code.

PURPLE = eMMC boot failure, check CMD / CLK
PINK = NS eMMC init fails, inoperative eMMC ?
WHITE = eMMC write
YELLOW = eMMC write failure, check D0 / unsupported eMMC

I assume CMD line used to give command to the emmc chip when initialization, and CLK is used to sync the signal.

Maybe the flowchart is NS boot (by rst line), but theres no signal on CMD (initialization) throw Purple. After initialization through the CMD, If the initialization failed (no response) throw Pink. If success it will write to the emmc through D0 line (the payload loader?) indicate by White color. If failed (no response) then throw Yellow color code.

rehius can answer this

 

[Modi]

View attachment 368794

Nice One

 

[QuiTim]

no no no, the mosfet is n mosfet,model is GSMDC3908Z
View attachment 368793

Post automatically merged: May 4, 2023

There is not enough current, and the MOSFET needs to handle a large current,

Thank you for the clarification, I appreciate it

 

[nico77]

Yes, but its more difficult to solder 2smd series, rather than just use one smd.

I think D0 is not relevant on purple error color code.

PURPLE = eMMC boot failure, check CMD / CLK
PINK = NS eMMC init fails, inoperative eMMC ?
WHITE = eMMC write
YELLOW = eMMC write failure, check D0 / unsupported eMMC

I assume CMD line used to give command to the emmc chip when initialization, and CLK is used to sync the signal.

Maybe the flowchart is NS boot (by rst line), but theres no signal on CMD (initialization) throw Purple. After initialization through the CMD, If the initialization failed (no response) throw Pink. If success it will write to the emmc through D0 line (the payload loader?) indicate by White color. If failed (no response) then throw Yellow color code.

for example
i want to resolder the point, i need clean old lead.
is it safe to use solder wick

im afraid it will broke the pad point

 

[Modi]

for example
i want to resolder the point, i need clean old lead.
is it safe to use solder wick

im afraid it will broke the pad point

Just mix it new solder and flux

 

[nico77]

Just mix it new solder and flux

cuz i wanted to close other point with uv mask
so i can solder easily the important point

i bought uv lamp
ill close those point

*for example
im planning to clean older solder lead(excess solder*i google it lol)

any tips to grab/ remove the older lead ?
the only thing i know is solder wick.
but im afraid killing those point

 

[NetYaroze]

Good morning everyone! Can er tell me a good soldering iron, the solder wire, the correct wires for soldering on the right points and the flux, suitable for installing picofly? I have a person who would do the picofly install but doesn't have everything needed (except the technique). I tried to install myself picofly but with bad results because I used tools that didn't help me and I would like to provide everything I need.

Thanks!

 

[jacopo99]

View attachment 368616
View attachment 368651
View attachment 368617
PICOFLY ИX module (verified)

Use easyeda PRO

The CPU cable will be released later
The resistor uses 0402 and is not recommended for novice welding
The circuit board is 0.8mm thick

V0.8.1+ supports jumpers, V1 V2 LITE OLED universal

I'm very interested in the cables. Can you pm me ASA they have been published for OLED?

 

[nqtal]

I apologize for posting this here again. I took my switch from workshop, but they couldn't fix it. Now Nintendo logo appears, then black screen and backlight continues to work. There is no reaction to charging and don't start recovery mode. Is that problem on APU or nand?

 

[Adran_Marit]

I apologize for posting this here again. I took my switch from workshop, but they couldn't fix it. Now Nintendo logo appears, then black screen and backlight continues to work. There is no reaction to charging and don't start recovery mode. Is that problem on APU or nand?

If its stuck at nintendo screen I'm guessing a nand issue.

About at my limit of patience, I get the blue light then a yellowish orange light which should be Dat0 but everything seems to check out. Unsolder everything and it boots fine still.

tried a different pi yet?

Post automatically merged: May 4, 2023

@rehius does the picofly toolbox just run off a modded version of the hwfly toolbox?

 

[Lightboubou]

I found this chip on aliexpress, do I also need to buy resistor with it or is it already soldered with the board ?

 

[A-Hacked-Soul]

If its stuck at nintendo screen I'm guessing a nand issue.


tried a different pi yet?

Post automatically merged: May 4, 2023

@rehius does the picofly toolbox just run off a modded version of the hwfly toolbox?

I have a spare but gotta find it.

 

[leerz]

I apologize for posting this here again. I took my switch from workshop, but they couldn't fix it. Now Nintendo logo appears, then black screen and backlight continues to work. There is no reaction to charging and don't start recovery mode. Is that problem on APU or nand?

does hekate work? run an emmc benchark, slow mode switches will often fail on OFW boot.
if you attempt to boot OFW continuously whilst a chip is installed and it's reporting slow mode emmc, it could brick the sysnand.
backup your prodkeys, rebuild nand, (follow sthetix level 2 unbrick), and try to boot again without any chip.

 

[iolo57]

I found this chip on aliexpress, do I also need to buy resistor with it or is it already soldered with the board ?
View attachment 368827They are on the board (aligned at the bottom right)

 

[Adran_Marit]

I found this chip on aliexpress, do I also need to buy resistor with it or is it already soldered with the board ?
View attachment 368827

resistors already soldered *bottom right*