[BTC-dev] Presenting... Build your own Pogotron.

Sun Mar 29 02:36:25 UTC 2015

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Read POGOTRON.TXT.
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asciilifeform's pogotron!
-------------------------

-- or, how to bake a reasonable linux for pogov4. --

First things first, the manifest:

SHA512
a10c2d205f30925540907b30276f8459582bc52b79113e87a7bd86491b9639d947e81bfae18ec528fa1f52c5b8f6561bcadf9ea2e67f90298e641bde033bf483  buildroot-asciilifeform-pogov4.patch
f9f2d0a7511e71b9fb9dde15de7004268930aded27278c29d0a8675d5089df7444e9177e4aaef32faa5debb793ec0ff2013abdf2ce038a2374394fbcfee97528  buildroot-asciilifeform-pogov4.patch.sig

Get these from http://buildroot.uclibc.org/download.html :

974451cc4d1a5721ef151d226e878b1383e04fcbf2ae89bf146c2859a16fe3854ecc812800e34cafa62bf1a7287ba18ac35a1dec467d1656c53c59031fa092e5  buildroot-2015.02.tar.gz
7cb26d2a8377268bf483dc1b7cbda4a2b647f64c28d5c593261380bfd9ba04e3336d52fa17bea518f0cf286688c993f073ae4d09c1a6dda9f5079c87c144050c  buildroot-2015.02.tar.gz.sign

1) Check my pgp sig.
2) Check his pgp sig.
3) Put on a kettle of tea
4) tar xvfz buildroot-2015.02.tar.gz
5) copy buildroot-asciilifeform-pogov4.patch to buildroot-2015.02
6) cd buildroot-2015.02
7) patch -p1 < buildroot-asciilifeform-pogov4.patch
8) make pogoplug_defconfig
9) tea should be ready, pour a cup
10) make all
....
.... gcc, toolchain, etc. will LOAD FROM THE NET!
.... TODO: we need to freeze all of it in time. and sign.

11) continue drinking tea
12) YOUR KERNEL IS AT
    buildroot-2015.02/output/images/uImage

    If you have a tftp server set up (see http://therealbitcoin.org/ml/btc-dev/2015-February/000050.html)
    you might want to point it at, e.g., /home/lamer/tftp/kernel and

    ln -s /home/lamer/buildroot-2015.02/output/images/uImage /home/lamer/tftp/kernel

    ... then every time you rebuild, all you need to do is cycle power to the Pogo (you -did- configure the u-boot to tftp by default, aha?)

-- Quick Guide to the Patch --

Notice that when you applied it, you got:

-----------------------------------------------------------------------
patching file board/pogo/pogo/busybox.config
patching file board/pogo/pogo/fs-overlay/etc/dhcpcd.conf
patching file board/pogo/pogo/fs-overlay/etc/hostname
patching file board/pogo/pogo/fs-overlay/etc/hosts
patching file board/pogo/pogo/fs-overlay/etc/inittab
patching file board/pogo/pogo/fs-overlay/etc/network/interfaces
patching file board/pogo/pogo/linux.config
patching file configs/pogoplug_defconfig
-----------------------------------------------------------------------

Or else something went terribly wrong.

Let's go through these:

board/pogo/pogo/busybox.config
--- Determines what programs end up in the userland snapshot, as well as the overall behaviour (e.g., what arch, how to package, whether to make rootfs [1] and what kind)

board/pogo/pogo/fs-overlay/etc/dhcpcd.conf
--- If want to customize this

board/pogo/pogo/fs-overlay/etc/hostname
--- Same as above

board/pogo/pogo/fs-overlay/etc/hosts
--- Hostname

board/pogo/pogo/fs-overlay/etc/inittab
--- READ THIS ONE - anything that fires at boot-up will live here. Currently, a suicidal (pw-less root) telnetd.

board/pogo/pogo/fs-overlay/etc/network/interfaces
--- Configures ethernet and starts DHCP

board/pogo/pogo/linux.config
--- Our kernel config! Snipped as much crud as could think of

configs/pogoplug_defconfig
--- This is the config which 'brings them all and in the darkness binds them.'

///////////////////////
What's missing?
///////////////////////

Plenty of things.
bitcoind. (eventually we want this as a buildroot package! so no one has to fuck with crossdev tool building, etc.)
LED lamp.
GPIO toggle button (telnetd should only start if it is held, ideally)
Probably more.
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