No EEPROM/flash device found.

Hello everybody

Thank you for your hard work.
I have a MBA A1466, RsbPi Model B and a Easy Flash Hirose 30 from Chipmunk.
When I try the flashrom command it gives me
"No EEPROM/flash device found."
Can you tell what is going wrong??

Have you successfully used this setup before? If not:
How many amps is your rbp power supply?
How long are your wires?
Have you experimented with the various power states?

A1466 covers a wide range of hardware. Which year and spec is it?

Also have you double checked your connections?

Thank you for your answer. I will reply at Friday since Im not at home these days

Babis

Hello again

This is the pastebin text
paste.debian.net/901539/

The answer of your questions:
It's the first time i try this.
- Raspberry Pi power supply is 2000mA
- length of the wires, about 12 cm
- "Power States"? You mean with/without battery. With/without power cable? If yes, i did and I'm having same results
- MacBook Air (13-inch Mid 2013) IP get this from Serial Number dl.dropboxusercontent.com/1/view/zwh1at0wwaabkx6/Apps/Shutter/Selection_016.jpg
- Connection is doublechecked

Any ideas???

please share a photo of how the adapter is connected to the MacBook air.
please share a photo of the wiring at your rbp and your adapter.
please share your flashrom command.

This is the adapter
dl.dropboxusercontent.com/1/view/2z7cg9ahkz3ub3z/Apps/Shutter/Selection_017.jpg

This is the adapter connected
dl.dropboxusercontent.com/1/view/c1sgdd3ny23tp60/Apps/Shutter/Selection_018.jpg

This is the connection with the Pi model B
dl.dropboxusercontent.com/1/view/e2kuiokbgh305z6/Apps/Shutter/Selection_019.jpg

Flashrom command:

i cannot follow the wires from your chipmunk to your pi.
can you be sure you've connected the wires to the pi in this order:

Yes is exactly like this. I have checked the cables many times

ok. i haven't got a lot of experience with the chipmunk easyflash. does your activity light ever come on?

also, did you follow the tutorial on this website for flashrom setup on your pi?

The activity light blinks exactly two times when I give the command

I followed this tutorial yes. I think is the best I can find

please take a multimeter and test continuity between your chipmunk harness and these points on the adapter.

please note there are LOTS of grounds to choose from (-;



from the pics i can find online, you appear to have connected the chipmunk correctly to the mac.

this is the logic board side. you can confirm the correct orientation by locating the ground connections.

I will try that and let you know. Thank you

your multimeter should have a continuity setting, denoted by the ->|- symbol. if it has an audible, there may be a sound pictogram as well.



after selecting the correct mode, touch your probe leads together. this will ensure this function is working, as well as show you what to expect when testing the chipmunk.



using a helping hand (if available), locate 3v3 on the chipmunk on place a probe lead on it.



now locate the VCC wire at the raspberry pi, and place the other probe lead there.



your multimeter should confirm continuity by beeping or the display. please confirm all SPI connections on the chipmunk per the first pinout i sent.

the second (identical looking, but reversed horizontally) pinout is the logic board connector. you can determine where the grounds are and this will confirm the orientation of the chipmunk board.

Hello

(sorry for my ignorance)
The Pi should be plugged in?
Also, is this the right choice (mode and cable connection)?

The pi should not be plugged in for testing continuity.

If you touch the black and red leads together and it beeps, that setting will work. If not, click two left and select 2K. That arrow symbol indicates continuity test, which is basically zero ohms resistance.

OK
I connected the black probe with 3x3V wire and the red probe with chipmunk. At the top right side I was able to hear the sound from polymeter. When I touched other pins of the chipmunk sometimes the red light was turning on. Now I have some questions:

1. Why are we doing this?
2. Should I do it to the MacBook Air logic board too?
3. Should I do it with other wires and chipmunk pins?

Thank you very much (first time I use a polymeter! )

Great! A multimeter is a very valuable tool.

The purpose of this is to make sure that all of the signals are making it from the raspberry pi to the MacBook logic board.

Please also check continuity on CS, GND, DI, DO, and CLK

If all of those show continuity, we can probably rule out the chipmunk as the problem.

I have never used one of those, so it's a bit of a variable when troubleshooting your connection.

Edit:

You COULD test between the debug header and the EFI chip, however you would have to use the resistance setting as there are several resistors and the like between the header and the chip.

I would venture to say that the macbook's internal connections are probably ok if there are no signs of spill or short circuit.

I have them working if you want info contact me

Chipmunk and A1419 efi remove

You have to power up the EFI ROM seperately, since the chipmunk adapter is not able to power it up.