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update pi section

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Torsten Ruger
2018-04-28 18:32:42 +03:00
parent e562a97028
commit f02304e457
2 changed files with 62 additions and 40 deletions
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52
app/views/pages/arm/qemu.html.haml
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@@ -2,7 +2,7 @@
%h1= title "How to configure Qemu"
%h2#target-pi-on-mac Target Pi on Mac
%h2 Target Pi on Mac
%p So even the idea is to run software on the Pi, not everyone has a Pi (yet :-)
%p Others, like me, prefer to develop on a laptop and not carry the Pi around.
%p For all those, this here explains how to emulate the Pi on a Mac.
@@ -10,30 +10,33 @@
Even if you have a Pi,
=link_to "this explains", "remote_pi.html"
a nice way to develop with it.
%h3#replace-the-buggy-llvm Replace the buggy llvm
%p Written April 2014: as of writing the latest and greatest llvm based gcc (5.1) on Maverick (10.9) has a bug that makes qemu hang.
%p So type gcc -v and if the output contains “LLVM version 5.1”, you must install gcc4.2. Easily done with homebrew:
%h3 Qemu
%p Get the Qemu. There may be other emulators out there, and i have read of armulator, but this is what i found discribed and it works and is “easy enough”.
%pre
%code
:preserve
brew install https://raw.github.com/Homebrew/homebrew-dupes/master/apple-gcc42.rb
%p This will not interfere with the systems compiler as the gcc4.2 has postfixed executables (ie gcc-4.2)
%h3#qemu Qemu
%p Then its time to get the Qemu. There may be other emulators out there, and i have read of armulator, but this is what i found discribed and it works and is “easy enough”.
%pre
%code
:preserve
brew install qemu --env=std --cc=gcc-4.2
%p For people not on Maverick it may work without the -cc option.
%h3#pi-images Pi images
brew install qemu
%h3 Pi images
%p Create a directory for the stuff on your mac, ie pi.
%p Get the latest Raspian image.
%p There seems to be some chicken and egg problem, so quemu needs the kernel seperately. There is one in the links.
%h3#configure Configure
%p
In the blog post there is some fun configuration, I did it and it works. Not sure what happens if you don’t.
The booting is described below (you may or may not need an extra init=/bin/bash in the root… quotes), so boot your Pi and then configure:
%p nano /etc/ld.so.preload
There seems to be some chicken and egg problem, so qemu needs the kernel separately.
There is one in the links.
%h3 Configure
%p
In the blog post there is some fun configuration, I did it and it works.
Not sure what happens if you don’t.
The booting is described below (you may or may not need an extra init=/bin/bash in the root… quotes),
so boot your Pi and then configure:
%p
%pre
%code
nano /etc/ld.so.preload
%p Put a # in front of the first to comment it out. Should just be one line there.
%p Press ctrl-x then y then enter to save and exit.
%p (Optional) Create a file /etc/udev/rules.d/90-qemu.rules with the following content:
@@ -53,8 +56,8 @@
:preserve
qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append 'root=/dev/sda2 panic=1 rootfstype=ext4 rw' -hda raspbian.img -redir tcp:2222::22
%ul
%li the cpu is what braodcom precifies, ok
%li memory is unfortuantely hardcoded in the versatilepb “machine”
%li the cpu is what broadcom specifies, ok
%li memory is unfortunately hardcoded in the versatilepb “machine”
%li the kernel is the file name of the kernel you downloaded (or extracted)
%li raspbian.img is the image you downloaded. Renamed as it probably had the datestamp on it
%li the redir redircts the port 2222 to let you log into the pi
@@ -92,11 +95,14 @@
resize2fs
%h2#links Links
%p
Blog post:
Blog post (i used):
=ext_link "http://xecdesign.com/qemu-emulating-raspberry-pi-the-easy-way/", "http://xecdesign.com/qemu-emulating-raspberry-pi-the-easy-way/"
%p
More Recent post (i googled):
=ext_link "https://blog.agchapman.com/using-qemu-to-emulate-a-raspberry-pi/", "https://blog.agchapman.com/using-qemu-to-emulate-a-raspberry-pi/"
%p
Kernel:
=ext_link "http://xecdesign.com/downloads/linux-qemu/kernel-qemu", "http://xecdesign.com/downloads/linux-qemu/kernel-qemu"
%p
Rasbian file system(preferably be torrent):
Rasbian file system(preferably by torrent):
=ext_link "http://www.raspberrypi.org/downloads/", "http://www.raspberrypi.org/downloads/"