Hacking Hardware Picofly - a HWFLY switch modchip

[lightautodark]

is the rp2040-zero thin enough to go underneath the shield without cutting the shield?

 

[deeps]

is the rp2040-zero thin enough to go underneath the shield without cutting the shield?

on oled yes, on lite/v1/v2 no

 

[lightautodark]

on oled yes, on lite/v1/v2 no

thanks for the quick reply! I'll continue with tiny then.

 

[linkref]

Hi,

I am very lost, it's the first time I see this issue. On switch lite, i have 1 of 10 times the *== (short long long) error....
I am used to this on OLEDS ==> i fix this by switching to an instinct-nx...

On the lite i've tried two rp2040, and now with a tiny the problem is still there.

Here are my readings and some pictures of the installation.

3v3 : 7,75
d0 (c) : 5.25
cmd (a) : 6,62
clk (d) : 6,68
rst (b) : 12,14
cpu : 5.59

 

[lightautodark]

Hi,

I am very lost, it's the first time I see this issue. On switch lite, i have 1 of 10 times the *== (short long long) error....
I am used to this on OLEDS ==> i fix this by switching to an instinct-nx...

On the lite i've tried two rp2040, and now with a tiny the problem is still there.

Here are my readings and some pictures of the installation.

3v3 : 7,75
d0 (c) : 5.25
cmd (a) : 6,62
clk (d) : 6,68
rst (b) : 12,14
cpu : 5.59

I replied to you previously. It is the dat0 connection. Even if the value is correct please just redo it. I had the exact same problem previously.

 

[linkref]

I replied to you previously. It is the dat0 connection. Even if the value is correct please just redo it. I had the exact same problem previously.

It's a switch LITE not OLED, d0 is easy to solder so how could I may missed it ?
I will try and leave feadback

 

[jkyoho]

Hi,

I am very lost, it's the first time I see this issue. On switch lite, i have 1 of 10 times the *== (short long long) error....
I am used to this on OLEDS ==> i fix this by switching to an instinct-nx...

On the lite i've tried two rp2040, and now with a tiny the problem is still there.

Here are my readings and some pictures of the installation.

3v3 : 7,75
d0 (c) : 5.25
cmd (a) : 6,62
clk (d) : 6,68
rst (b) : 12,14
cpu : 5.59

original 3x 47 ohm resistor on rp2040-tiny sets? replace the dat0 one with 100 ohm and try again

 

[linkref]

original 3x 47 ohm resistor on rp2040-tiny sets? replace the dat0 one with 100 ohm and try again

yeah, arffff i do not have thoses in stock :/ you think it's related to this ?

 

[jkyoho]

yeah, arffff i do not have thoses in stock :/ you think it's related to this ?

its been proved many times from many people. 3x 47 ohm in some case would not be enough, and people recommend 100(DAT0), 100(CMD) and 47(CLK) resistor setup.


You could put extra 47 ohm or up resistor on the pot29(dat0) to increase the resistance like old days if you dont have/confident to replace to on-board 47 ohm resistor

 

[lightautodark]

It's a switch LITE not OLED, d0 is easy to solder so how could I may missed it ?
I will try and leave feadback

There's really no harm trying..

 

[bvang913]

Or add another 47 to dat0 and cmd. That's what I usually do by default just so I don't have any issues.

 

[linkref]

its been proved many times from many people. 3x 47 ohm in some case would not be enough, and people recommend 100(DAT0), 100(CMD) and 47(CLK) resistor setup

ok thanks, when you said "would not be enough", what happends when it's not enough ?

 

[Nephiel]

Also, it looks like there's no protection? Put some kapton tape, or it's a short waiting to happen.

Maybe use thicker wire for 3.3 and GND too.

 

[lightautodark]

Make sure you don't ground any of the connection. Especially the tiny touching the shield can cause issue as well.

I once had *= then =* when the tiny is sitting on top of the shield without anything covering the back of the chip. Causing it to short.

 

[jkyoho]

ok thanks, when you said "would not be enough", what happends when it's not enough ?

"when not enough", the glitch progress would get interference by other datalines or noises so glitch failed and you would see error code *== ( or maybe other error code)

 

[linkref]

"when not enough", the glitch progress would get interference by other datalines or noises so glitch failed and you would see error code *== ( or maybe other error code)

Do you have a link or a ref to buy 100ohm resistor i will replace it directly on the board

 

[lightautodark]

Do you have a link or a ref to buy 100ohm resistor i will replace it directly on the board

Amazon if you don't want to wait. Or AliExpress if you don't mind waiting. China national day holiday now it might be a long wait

 

[linkref]

Amazon if you don't want to wait. Or AliExpress if you don't mind waiting. China national day holiday now it might be a long wait

Do you have any ref, (i do not want to mess with size)

 

[lightautodark]

Think Amazon listing varies by country. Size 0201

 

[linkref]

Think Amazon listing varies by country. Size 0201

I found this, do you think it's okay ?