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Some docs improvements for a mac #56

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Some docs improvements for a mac #56

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cc1ebb4
Some docs improvements for a mac
zmanian Apr 1, 2020
84ef8ca
More mac improvements
zmanian Apr 1, 2020
b4dd3da
README: document how to get a pre-compiled u-boot
japaric Apr 1, 2020
7847243
Merge pull request #58 from iqlusioninc/pre-compiled-u-boot
zmanian Apr 2, 2020
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20 changes: 20 additions & 0 deletions firmware/usbarmory/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -371,13 +371,23 @@ repository.
Run `make usbarmory-mark-two_config` to use the default USB Armory
configuration.

You will also the arm7 toolchain from the Linux packagemer or [ARM](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads).


Then run `make`, as shown below, to build U-Boot:

Linux
``` console
$ # NOTE this depends on arm-none-eabi-gcc and other C build tools
$ ARCH=arm CROSS_COMPILE=arm-none-eabi- make
```

On Mac, you need to work around two things.
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Should we also consider writing a small Dockerfile for building U-Boot as well?

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Another option is extracting the u-boot image from a pre-compiled Debian image. I'm checking if that works right now; if it works I'll send a PR to this branch to document that as a simpler alternative.


1. You need to make the compiler and linker aware of OpenSSL. These [instructions](https://medium.com/@timmykko/using-openssl-library-with-macos-sierra-7807cfd47892) worked.

2. Need to work around MacOS variant of `sed`. [This](https://gist.github.com/andre3k1/e3a1a7133fded5de5a9ee99c87c6fa0d) is one option.

This should result in a `u-boot-dtb.imx` file, which contains the built U-Boot
binary.

Expand Down Expand Up @@ -452,11 +462,21 @@ also means that you can keep a partition table in those first 1024 bytes (e.g.
MBR). You can partition the uSD before running the `dd` command -- ensure any
partition you create doesn't collide with the image you are about to flash.

Linux

``` console
$ sudo dd if=blinky.bin of=/dev/sda bs=512 seek=2 conv=fsync
$ sync
```

MacOS

``` console
$ sudo dd if=blinky.bin of=/dev/rdisk2 bs=512 seek=2 conv=sync
$ sync
```


Now terminate the USB Mass Store Device emulation by pressing Ctrl-C in the
`minicom` terminal / u-boot console. You can now disconnect the Armory.

Expand Down