Hacking Hardware Switch OLED SkHynix with Picofly long boot-time

[superfiege]

Hi there.
I installed a Picofly (Waveshare RP2040 tiny) on my Switch OLED with a SkHynix EMMC. Everthing works fine, but the startup procedure (payload-injection) sometimes is very long.
Im thinking about to swap to an Instinct-NX V6S but I like the Picofly more (because its open-source and a Raspberry).
What do you think, is it a good idea to change the chip or stay with the pico?

 

[baddass1979]

re-train the chip and see if that helps

 

[superfiege]

re-train the chip and see if that helps

yes, i retrained it several times but with the same result. sometimes it boots directly, sometimes it takes about 20 seconds.

 

[jkyoho]

whats your resistors setup and you use flex on APU or mosfet directly?

 

[superfiege]

whats your resistors setup and you use flex on APU or mosfet directly?

Ah yes...this is my setup:

APU Flex V2 with magnetic wire on bridget middle pins
36AWG 3.3v and gnd
magnetic wire on other points
kamikaze dat0 point (had a dat0 adapter before, was the same behaviour)
resistors are integrated in rp2040 tiny 47ohm on Dat0 CMD and CLK

 

[jkyoho]

Ah yes...this is my setup:

APU Flex V2 with magnetic wire on bridget middle pins
36AWG 3.3v and gnd
magnetic wire on other points
kamikaze dat0 point (had a dat0 adapter before, was the same behaviour)
resistors are integrated in rp2040 tiny 47ohm on Dat0 CMD and CLK

replace 47ohm on dat0 with 100 ohm and try again

 

[superfiege]

replace 47ohm on dat0 with 100 ohm and try again

Thank you. I will try and give feedback.

 

[Clydefrosch]

so is the longer startup time generally a problem for the console, i.e. it strains chips more than needed, or is it just purely a convenience thing? since once you're setup, you're not going to see the whole bootup sequence all that much anyways, right?

 

[superfiege]

so is the longer startup time generally a problem for the console, i.e. it strains chips more than needed, or is it just purely a convenience thing? since once you're setup, you're not going to see the whole bootup sequence all that much anyways, right?

yes, thats right. but its nice to know it would boot quickly
and Im allways looking for a bit of perfection, thats why i removed the dat0 adapter and made a kamikaze...

Post automatically merged: Mar 4, 2024

replace 47ohm on dat0 with 100 ohm and try again

I had no 100ohm so i soldered two 47ohm in series. Unfortunatelly its the same time to boot.
Any other ideas?

 

[leerz]

skhynix are a sht emmc,

you will need extra resistors, on cmd and dat0 line (yes just these two)
and a double mosftet is also ideal for this.

based on experience, most pcbs using skhynix emmcs are the dark green ones that had thicker pcb mask. this turns out to be ok for durability of the mb itself, but quite problematic with floating interference across the board

 

[dehydrated_lemur]

skhynix are a sht emmc,

you will need extra resistors, on cmd and dat0 line (yes just these two)
and a double mosftet is also ideal for this.

based on experience, most pcbs using skhynix emmcs are the dark green ones that had thicker pcb mask. this turns out to be ok for durability of the mb itself, but quite problematic with floating interference across the board

This makes me upset my OLED is skhynix. Hopefully they don't start failing like the Wii Us lol

 

[superfiege]

skhynix are a sht emmc,

you will need extra resistors, on cmd and dat0 line (yes just these two)
and a double mosftet is also ideal for this.

based on experience, most pcbs using skhynix emmcs are the dark green ones that had thicker pcb mask. this turns out to be ok for durability of the mb itself, but quite problematic with floating interference across the board

do you think it helps to connect the additional 2 i2c wires?

 

[dehydrated_lemur]

do you think it helps to connect the additional 2 i2c wires?

i don't think there's anything you can do. skhynix switchs just take longer dude.

 

[superfiege]

i don't think there's anything you can do. skhynix switchs just take longer dude.

this was what i feared. ok, payload-injection works without any problem, and i dont boot too much.....and i can look at the status led in my joy-con for a little longer

 

[leerz]

a solution if to buy a samsung emmc,flash your rawnand back to new emmc,

of course this assumes you know how to reball and use a rework

 

[superfiege]

a solution if to buy a samsung emmc,flash your rawnand back to new emmc,

of course this assumes you know how to reball and use a rework

Yeah, but I think this is a little bit too risky just to improve boot-time

 

[dehydrated_lemur]

Yeah, but I think this is a little bit too risky just to improve boot-time

skhynix chips fail on Wiiu. who's to say it won't happen on all the hynix switch.

 

[evil_santa]

Yeah, but I think this is a little bit too risky just to improve boot-time

Probably yes but it's a good time to add an 256gb Samsung emmc

 

[etnicor]

Probably yes but it's a good time to add an 256gb Samsung emmc

where do you buy the samsung emmc nands from?

 

[deeps]

In my experience, glitch time is mostly related to the mosfet setup. I've tried all combinations of everything (mosfet on front, back, double or single, different wire thickness, wire length etc) and the setup that I find performs the best (tested across many switches) is 0.2mm thick wires attached like in the picture.