Hacking Hardware Picofly - a HWFLY switch modchip

[QuiTim]

Most of the times the problem is with dat0 line so that is the main one to have 100ohm but sometimes (not so often) you need 100 on cmd as well.

For the moment I put 100ohms only on DAT0, why CMD need it too ?

 

[LogicalMadness]

https://hackaday.io/project/192519-rpdot

 

[abal1000x]

https://hackaday.io/project/192519-rpdot

View attachment 390276

It says he used 4layer pcb, which is quite pricy

 

[Dee87]

https://hackaday.io/project/192519-rpdot

View attachment 390276

your still gonna have to install resistors, no led and the firmware needs to be changed.

i mean sure is cool but there is absolutly no reason for we have the tinys what else do u need it fits perfect so :-)

 

[lightninjay]

https://hackaday.io/project/192519-rpdot

View attachment 390276

I too saw this article on hackaday this morning, but my immediate thought was the same as the complaints in the hackaday comments: he got it this small by doing like the rp2040-zero; he placed components on both the front and back, ultimately making the board thicker than offerings like the rp2040-tiny.

Pretty cool project regardless, especially if only considering the "how small can we actually make this?" notion.

 

[MonkeyJumper]

Hi, i have question. My v2 console has a toshiba emmc and it takes up to 40 sec to boot with a pico zero. Are there still issues with toshiba or how could i improve the timing to glitch? v2 flex and awg34 cables were used

 

[abal1000x]

Hi, i have question. My v2 console has a toshiba emmc and it takes up 40 sec to boot with a pico zero. Are there still issues with toshiba or how could i improve the timing to glitch? v2 flex and awg34 cables were used

If its first time its okay.

Reboot again and again to fill the characteristics data.
Any success 'glitch point' will be saved, and the next reboot will use these data.

 

[MonkeyJumper]

If its first time its okay.

Reboot again and again to fill the characteristics data.
Any success 'glitch point' will be saved, and the next reboot will use these data.

thx, will try to reboot some times

Post automatically merged: Aug 25, 2023

If its first time its okay.

Reboot again and again to fill the characteristics data.
Any success 'glitch point' will be saved, and the next reboot will use these data.

i've rebooted 4 times and one time it glitched after 2 min. I dont get it. What affects glitching the most?

 

[jkyoho]

thx, will try to reboot some times

Post automatically merged: Aug 25, 2023

i've rebooted 4 times and one time it glitched after 2 min. I dont get it. What affects glitching the most?

mosfet and SOC.
What Pfly fw and what mosfet do you use?

 

[MonkeyJumper]

mosfet and SOC.
What Pfly fw and what mosfet do you use?

i've redone the soldering on the soc and it is a bit better, but still takes quite long >30sec. it was a v2 flex cable, probably the common mosfets

 

[jkyoho]

i've redone the soldering on the soc and it is a bit better, but still takes quite long >30sec. it was a v2 flex cable, probably the common mosfets

try the SDA, SCL undervoltage method if you are on v2.7+ picofly fw

https://gbatemp.net/threads/picofly-a-hwfly-switch-modchip.622701/post-10090767

 

[MonkeyJumper]

try the SDA, SCL undervoltage method if you are on v2.7+ picofly fw

i've added them, and they seem to improved it. Still sometimes it boots instantly, somestimes takes still longer. Maybe have to be observed and boot many times. thx still sometimes even 2min, wtf :x

 

[naldo29]

Did my average 4p2040 zero install, thought everything went well, until i turned it on and got a cmd not connected error, so i just redid my cmd, anyways i got it to boot to hakete and tried to go into sysnand (got that message) then i tried to just boot into OFW and got a purple screen, did i corrupt my nand while trying to do the Dat0? (the multimeter reading seemed fine) also i tried to look around here to see what it could be and i heard it could also have to do something with the CMD resistor, anyways any help would be appreciated thanks!

 

[Dee87]

For purple screen check if ur cmd resistor has 4.7k if not replace make sure the resistor has a proper connection to the pads on the board.

For init emmc I would try to add another 47ohm on dat0 and cmd on the pico or replace them to with 100ohm resistors

 

[naldo29]

For purple screen check if ur cmd resistor has 4.7k if not replace make sure the resistor has a proper connection to the pads on the board.

For init emmc I would try to add another 47ohm on dat0 and cmd on the pico or replace them to with 100ohm resistors

wait so purple screen

For purple screen check if ur cmd resistor has 4.7k if not replace make sure the resistor has a proper connection to the pads on the board.

For init emmc I would try to add another 47ohm on dat0 and cmd on the pico or replace them to with 100ohm resistors

well im not getting any readings on that resistor, nor on the resistor next to it, could they both be damaged? i only messed with the one I needed to mess with for the install so I don't know how the other one could've gotten damaged, anyways, where could I get a replacement 4.7k resistor anyway? would I have to go buy them online? or is there somewhere I could grab them off

Post automatically merged: Aug 26, 2023

For purple screen check if ur cmd resistor has 4.7k if not replace make sure the resistor has a proper connection to the pads on the board.

For init emmc I would try to add another 47ohm on dat0 and cmd on the pico or replace them to with 100ohm resistors

actually i just realized, i have a library of resistors that I bought for the 47 resistors for the rp2070 zero and I have like 20 0805 4.7k resistors. its a bit big but I think I can make it work. just worried about the one beside the cmd one not giving me a reading.

 

[jkyoho]

wait so purple screen

well im not getting any readings on that resistor, nor on the resistor next to it, could they both be damaged? i only messed with the one I needed to mess with for the install so I don't know how the other one could've gotten damaged, anyways, where could I get a replacement 4.7k resistor anyway? would I have to go buy them online? or is there somewhere I could grab them off

Post automatically merged: Aug 26, 2023

actually i just realized, i have a library of resistors that I bought for the 47 resistors for the rp2070 zero and I have like 20 0805 4.7k resistors. its a bit big but I think I can make it work. just worried about the one beside the cmd one not giving me a reading.

what and how do you measure reading on those resistors?

 

[naldo29]

what and how do you measure reading on those resistors?

i go to the ohms section on my multimeter, select 2k and put each prone on each side, lmk if Im royally fucking it up lol ( I get nothing when I do that.

 

[jkyoho]

i go to the ohms section on my multimeter, select 2k and put each prone on each side, lmk if Im royally fucking it up lol ( I get nothing when I do that.

set 20K or 200k then since they both above 2k reading

 

[naldo29]

set 20K or 200k then since they both above 2k reading

got it removed but the other one is still giving me 0 reading, is it also supposed to be 4.7k? should I remove it too?

 

[Dee87]

got it removed but the other one is still giving me 0 reading, is it also supposed to be 4.7k? should I remove it too?

The other one is supposed to be 470 ohm I think not sure though