I need some help :)


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7 years 4 months ago #5512 by Akz
I need some help :) was created by Akz
Hello everybody !

Today I received the Easy Flash Adapter v4.0.3.

So I decided to prepare for the flashing. 1st I plug the cables in the good ones to each pin Raspeberry Pi 3 to the flash adapter following this : pi4j.com/images/gpio-listener-example.png


After, I installed all the prerequisite on the RPI followin this thread : www.ghostlyhaks.com/blog/apple-efi/31-efi-removal-step-by-step?showall=&start=2

All works but when I put this line : sudo flashrom -r ~/efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0
It says that No EEPROM/flash device found. Note: flashrom can never write if the flash chip isn't found automatically.
So my question is, what's now ? where am I wrong ?

If it may help, the EMC is : 2925 and model : A1466

Thank you for your help ! :)
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7 years 3 months ago #5517 by reverendalc
Replied by reverendalc on topic I need some help :)
Please share a close-up of the wiring at the pi and the 4.0.3.

Also, did you remove the SPI blacklist on the rbp?

Please run "ls /dev/" on the pi and share the results.
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7 years 3 months ago - 7 years 3 months ago #5529 by Akz
Replied by Akz on topic I need some help :)
Hello, thank you for your reply !

Here are the screenshots :







For the SPI blacklist, I had nothing in !

and here the result for the ls /dev/



Hope you see something wrong :)
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Last edit: 7 years 3 months ago by Akz.
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7 years 3 months ago #5530 by reverendalc
Replied by reverendalc on topic I need some help :)
you have your GPIO pins on the left side wrong.. they're shifted down one...

they're on 21,23,25 and should be on 19,21,23



also, you have two spidev entries in /dev/
try addressing spidev0.1
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7 years 3 months ago #5531 by Akz
Replied by Akz on topic I need some help :)
Hello,

I'm feel so stupid about this shift...Now it's correct.

So I tried both sudo flashrom -r /home/pi/efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.1 & sudo flashrom -r /home/pi/efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0 and I've the same message that say nothing found...:(
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7 years 3 months ago #5537 by reverendalc
Replied by reverendalc on topic I need some help :)
Please post the output of addressing both spidev devices.

If you read the output you first shared, no programmer was initialized. We need to make sure flashrom can initialize the programmer before we troubleshoot chip connectivity
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7 years 3 months ago #5538 by reverendalc
Replied by reverendalc on topic I need some help :)
Please post the output of addressing both spidev devices.

If you read the output you first shared, no programmer was initialized. We need to make sure flashrom can initialize the programmer before we troubleshoot chip connectivity
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7 years 3 months ago #5540 by Akz
Replied by Akz on topic I need some help :)
The output for spidev0.1 : pastebin.com/tZHb7Z8S
The output for spidev0.0 : pastebin.com/35cJewUK
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7 years 3 months ago #5560 by reverendalc
Replied by reverendalc on topic I need some help :)
apparently both spidev are your rbp. fun. i suppose either or will work.

which model is your MacBook?
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7 years 3 months ago #5566 by Akz
Replied by Akz on topic I need some help :)
Hello,

The model of my Mac is A1466
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7 years 3 months ago #5569 by reverendalc
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7 years 3 months ago #5572 by Akz
Replied by Akz on topic I need some help :)
EMC : 2925 AND Year : 2015
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7 years 3 months ago - 7 years 3 months ago #5573 by reverendalc
Replied by reverendalc on topic I need some help :)
Try powering the Mac on to the EFI lock screen, closing the lid, and connecting to the chip then.

Try booting to iCloud lock screen, closing and connecting.

Or, try removing ssd, powering on to (?) screen, closing lid and connecting.

Also experiment with removing the vcc pin
Last edit: 7 years 3 months ago by reverendalc.
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7 years 3 months ago #5595 by Akz
Replied by Akz on topic I need some help :)
Hello,

Try powering the Mac on to the EFI lock screen, closing the lid, and connecting to the chip then.

Nothing change :/

Try booting to iCloud lock screen, closing and connecting.

I've this, how can I do this ?

It says that the Macbook is locked for x minutes

Or, try removing ssd, powering on to (?) screen, closing lid and connecting.

Is it the top connector ? (Sorry I'm a noob with Mac)

Also experiment with removing the vcc pin

Nothing change
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7 years 3 months ago #5611 by reverendalc
Replied by reverendalc on topic I need some help :)
you have the clip correctly connected.

ensure your battery is fully charged, and connected to the mac along with the magsafe charger.
remove the VCC pin from your easy flash clip, but leave the rest of the wires (including ground) connected.

power on mac with ALT key until you reach the padlock screen
close the lid, flip it over, and connect to the chip

or

power on mac and let boot to the "this computer is disabled" screen
close the lid, flip it over, and connect to the chip

or

remove the SSD, power on the mac and boot to the [?] screen
close the lid, flip it over, and connect to the chip

one of these configurations should work
i have just done so recently
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7 years 3 months ago - 7 years 3 months ago #5619 by Akz
Replied by Akz on topic I need some help :)

ensure your battery is fully charged, and connected to the mac along with the magsafe charger.
remove the VCC pin from your easy flash clip, but leave the rest of the wires (including ground) connected.

power on mac with ALT key until you reach the padlock screen
close the lid, flip it over, and connect to the chip


Doesn't work :dry:

power on mac and let boot to the "this computer is disabled" screen
close the lid, flip it over, and connect to the chip

Sadly no

remove the SSD, power on the mac and boot to the [?] screen
close the lid, flip it over, and connect to the chip


I've not the pentalobe, but I'll try when I'll reveive it. Any other step ? :/

PS : I tried to do this with both Rpi2 and Rpi3 and the results are exactly the same.
Last edit: 7 years 3 months ago by Akz.
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7 years 3 months ago #5620 by reverendalc
Replied by reverendalc on topic I need some help :)
i'm very confused. it should be working. double-check that all of your wires are firmly connected.. perhaps reseat them? looking at your pictures, it seems correct, but here's another simplified GPIO pinout to follow:



try connecting the VCC, powering the mac off, leaving battery and magsafe connected, and attempting a read.

please share your flashrom command and the output.

also, here is a link to instructions for an SPI self-test. it only tests MISO/MOSI, but since you tried two different rbps, i doubt that's the issue
www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md#troubleshooting
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7 years 3 months ago - 7 years 3 months ago #5646 by Akz
Replied by Akz on topic I need some help :)

try connecting the VCC, powering the mac off, leaving battery and magsafe connected, and attempting a read.

Hello, I tried with this but it didn't work BUT I tried something else (YES SOMETHING NEW).

When I pull out the battery from the MAC and connect the Magsafe and do flashrom -r /home/pi/efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.1
I've a new result : pastebin.com/KwfnTupr

EDIT : I tried to pin/unpin the flash adapter, and it says again that he detect nothing...so the issue is probably a pin issue.

EDIT 2 : Ok on the pin on the motherboard broke by a miracle...youhou me and my luck...
Last edit: 7 years 3 months ago by Akz.
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7 years 3 months ago #5657 by reverendalc
Replied by reverendalc on topic I need some help :)
wait i'm super confused. flashrom identified a winbond chip and read it?

what's broken?

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