Hacking Hardware Picofly - a HWFLY switch modchip

Spore2

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In my case it was accidentally physically damaged during the modchip installation.

Since it boots into the IPL, the basic things like eMMC and CPU should be working. Looks like the power circuit is damaged somewhere
Oh, you mean power issues that prevent the sd card from being read?
In my case it was accidentally physically damaged during the modchip installation.

Since it boots into the IPL, the basic things like eMMC and CPU should be working. Looks like the power circuit is damaged somewhere
measured 1.8 vs on one of the test points. My guess is no 3.2 v. Any way I could rig this by feeding it 3.2v from elsewhere?
 

vittorio

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Just installed the rp2040 custom board on my lite and it works great except for a few hiccups.
I managed to fix these issues in case someone runs into:
The boot and rst buttons are a bit high on the lite, they can be removed.
The LDO (the chip in the red box in the picture) has to be removed or it would break and cause problems, after a day of playing the console suddenly gets stuck and the CPU buzzed and it wouldn't power on, I thought the CPU was dead, but everything went back to normal after removing the LDO, looks like reverse current killed it.
what firmware did you put?
 

rehius

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Oh, you mean power issues that prevent the sd card from being read?
no, I mean your power IC might not be able to feed CPU enough so the hardware cannot be completely inited. it is hard to measure such issues, so I suggested just to analyze the power IC and capacitors visually
 
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Kiuxn

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In my case it was accidentally physically damaged during the modchip installation.

Since it boots into the IPL, the basic things like eMMC and CPU should be working. Looks like the power circuit is damaged somewhere
lite. It can start IPL, hecate, but emmc cannot be read (with slow error) and cannot start CFW and OFW. Is this the same problem?
 

rehius

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lite. It can start IPL, hecate, but emmc cannot be read (with slow error) and cannot start CFW and OFW. Is this the same problem?
No. "slow eMMC mode" = eMMC lines interference.

might be caused by not cleaned flux, bad soldering, lack of resistors, too long wires
 

NooBziN

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there is a small range that works

47ohm - 51 ohm shouldn't have any issues
I see many people with slow emmc when this happens, you can put 2 Dat0 470+470 = 94 ohms that doesn't even give a problem solves slow emmc
 

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JackFrostSMT

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I see the diagram for the xiao, but the other thread says bridge pins 1 and 2, however the diagram indicates bridging pins 7 and 8 according to the label on the xiao
Edit: nvm ignore my dumbass, i see on an online pinout that the D numbers are whats printed and the P numbers are actual pins
 

sq_mys

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I am interested in reading through the source code. I have tried decompiling the fw_2.65.uf2 by using uf2conv to create a bin file and then decompiling it with objdump. This did not work. I have also tried loading the uf2 files using the online editors but those have failed to work aswell. Anyone have any other ideas?
 

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