Virtualbox?

[PartisanEntity]

Hi there,

Do you guys think it would be possible to get Crankshaft running on Virtualbox (on a Windows PC Host)? The idea is to set up an Android Auto test station as easily as possible (obviously as an alternative to installing Crankshaft on dedicated hardware such as a Raspberry Pi).

[matt2005]

It should be possible in qemu but I've never tried it

[parkerlreed]

If you just need to test Android Auto functionality for your phone, there's a desktop head unit emulator from Google.

https://developer.android.com/training/cars/testing#install

[h3krn]

I'm currently attempting to run crankshaft on qemu (as I currently dont have a rpi to play with). Based on documentation I found here. https://azeria-labs.com/emulate-raspberry-pi-with-qemu/ and https://github.com/dhruvvyas90/qemu-rpi-kernel.

I've already figured out I need to modify hardcoded references from /dev/mmcblk0p2 to /dev/sda2. After that it is booting.

• On first boot it will resize the virtual disk.
• On second boot dkms is broken because the kernel does not match the headers available in the image, but it will continue anyway.
• On third boot it sort of makes it until openauto, but because there is no wifi hardware it dies there.

I'm going to try using usb passthough to provide it with one. But according to https://bugs.launchpad.net/qemu/+bug/1772165 this is only avaible since qemu 5.1 So I'll need to upgrade my Linux Mint 20 for that somehow. Alternatively maybe there is an option to run this without any wifi?

apt install git qemu-system-arm kpartx
git clone https://github.com/dhruvvyas90/qemu-rpi-kernel.git
cd qemu-rpi-kernel
wget https://github.com/opencardev/crankshaft/releases/download/csng-alpha7/2020-10-26-crankshaft-ng-f8d7ba3.zip
unzip 2020-10-26-crankshaft-ng-f8d7ba3.zip
losetup -f 2020-10-26-crankshaft-ng-f8d7ba3.img 
kpartx -av /dev/loop0 
mount /dev/mapper/loop0p2 /mnt/
sed -i 's/mmcblk0p/sda/g' /mnt/etc/fstab
sed -i 's/mmcblk0p/sda/g' /mnt/usr/local/bin/crankshaft
sed -i 's/mmcblk0/sda/g' /mnt/usr/local/bin/crankshaft
sed -i 's/mmcblk0p/sda/g' /mnt/etc/initramfs-tools/scripts/local-top/local.sh
umount /mnt
qemu-system-arm -kernel kernel-qemu-4.19.50-buster -dtb versatile-pb-buster.dtb -cpu arm1176 -m 256 -M versatilepb -serial stdio -append "root=/dev/sda2 rootfstype=ext4 rw" --drive format=raw,file=2020-10-26-crankshaft-ng-f8d7ba3.img -no-reboot

I'll try to update if I make any progress on this.

[h3krn]

Scratch my previous post (most of it). I've learned the proper kernel and dtb can be easily extracted from the first partition of the image and qemu can emulate the mmcblk0 device.

apt install git qemu-system-arm kpartx
wget https://github.com/opencardev/crankshaft/releases/download/csng-alpha7/2020-10-26-crankshaft-ng-f8d7ba3.zip
unzip 2020-10-26-crankshaft-ng-f8d7ba3.zip
losetup -f 2020-10-26-crankshaft-ng-f8d7ba3.img 
kpartx -av /dev/loop0 
mount /dev/mapper/loop0p1 /mnt
cp /mnt/kernel7.img .
cp /mnt/bcm2709-rpi-2-b.dtb .
umount /mnt
qemu-system-arm -kernel kernel7.img -dtb bcm2709-rpi-2-b.dtb -M raspi2 -serial stdio -append "root=/dev/mmcblk0p2 rootwait console=ttyAMA0" --drive format=raw,file=2020-10-26-crankshaft-ng-f8d7ba3.img

No solution yet for openauto crashing or missing wifi hardware though.

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