SPI flash read command appear to be crash

General
1

I am trying to read an oncurcit chip using buspirate 5 i can probe the chip and manually read the chip but if i use flash read command it just print start of the progress and exit.

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2

Thank you for the bug report.

What is the command you use to dump the chip? I will try to replicate.

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3

flash read -f test.bin

4

okay i found the problem, by adding debug print, it seem the file is failed to write on the disk. may i know how to solve it.
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5

solve it by formatting the storage flash

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6

now i am getting no storaged mounted

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7

There is an ongoing discussion on this topic:

8

I would suggest to try to read the chip using binmode added by @Dreg and flashrom program on your Kali:

Read here. Its already merged in main

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9

I am also trying to read it via flashrom as well, i have read it before but right now, i am getting only 0xff read via flash rom but if i read it from SPI i am getting data.

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10

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11

Make sure to enter binmode before running flashrom command. Binmode is separate from being in SPI to note

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12

yeah the first picture is binmode with debugging enabled, second is in spi mode, i am just showing the spi mode can detect the chip, but flashrom is not detecting the chip and getting only 0xff data.
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13

Try with this version of firmware:

When it was introduced. If it works then there is some regression. I tested it just after adding but lots of stuff changed since then

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14

I’m looking into this now, thank you @AreYouLoco for making the connection with the disk IO errors. Sorry for the delay, I’d like to get this fully sorted this week.

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15

flash read -f test.bin

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I was able to run a chip dump to file and chip verify without issues. Latest firmware, windows, Teraterm.

Will start a new post to gather all the treads on this.

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16

May I ask how you formatted the flash storage? Using your OS or using the format command in the terminal?

17

i used OS, that was my bad i didn’t notice the format command in the buspirate until it become corrupted.

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18

Does using the format command in the Bus Pirate fix the storage issue?

19

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i did try it after i see the command as well but same result as now, i think the file system is corrupted.

20

Thanks for the follow up. I will send you a personal message to get your order number and we’ll send you a replacement.

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