Initial commit

.gitignore

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+root.tar.gz
+boot.tar.gz
+*.img
+build/*.tar
+build/*.img

Containerfile

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+FROM scratch
+ADD root.tar.gz /
+Add boot.tar.gz /boot
+USER root
+
+# # Import our image
+# COPY rpi.img /root/rpi.img
+# # Mount image
+# # @see https://www.boulderes.com/resource-library/building-raspberry-pi-disk-images-with-docker-a-case-study-in-software-automation
+# RUN losetup -Pf /root/rpi.img
+# RUN export RPILOOP=$(losetup -j /root/rpi.img | cut -d ':' -f 1)
+# RUN mount "/dev/${RPILOOP}p2" /mnt
+# RUN mount "/dev/${RPILOOP}p1" /mnt/boot
+# RUN mount -o bind /dev /mnt/dev
+# RUN mount -o bind /proc /mnt/proc
+# RUN mount -o bind /sys /mnt/sys
+# RUN chroot /mnt
+# Do stuff inside the chroot
+RUN hostname -f
+RUN cat /etc/shadow | grep pi
+# Configure dwc2
+RUN echo 'dwc2' >> /etc/modules
+RUN echo 'dtoverlay=dwc2' >> /boot/config.txt
+RUN sed -i 's/rootwait/rootwait modules-load=dwc2/' /boot/cmdline.txt
+RUN echo 'g_mass_storage' >> /etc/modules
+RUN echo 'options g_mass_storage file=/piusb.bin stall=0 ro=1' > /etc/modprobe.d/piusb.conf
+RUN dd if=/dev/zero of=/piusb.bin bs=1M count=2048
+RUN mkdosfs /piusb.bin -F 32 -I
+RUN mkdir /mnt/usb_share
+RUN echo '/piusb.bin /mnt/usb_share vfat users,gid=mariner,umask=002 0 2' >> /etc/fstab
+
+# Configure serial port comm to control the printer
+RUN echo 'enable_uart=1' >> /boot/config.txt
+# RUN systemctl stop serial-getty@ttyS0
+RUN systemctl disable serial-getty@ttyS0
+RUN sed -i 's/console=serial0,115200//' /boot/cmdline.txt
+
+# Install mariner
+RUN curl -sL gpg.l9o.dev | sudo apt-key add -
+RUN echo "deb https://ppa.l9o.dev/raspbian ./" | sudo tee /etc/apt/sources.list.d/l9o.list
+RUN apt-get update
+RUN apt-get install -y mariner3d
+
+# Clean-up
+RUN apt-get clean
+
+# Create output files
+#RUN tar -C / -czf /root/root.tar.gz --exclude='/boot/*' --exclude='/sys/*' \
+#  --exclude='/proc/*' --exclude='/run/*' --exclude='/dev/*' \
+#  --exclude=/root/root.tar.gz /
+#RUN tar -C /boot -czf /root/boot.tar.gz
+# # Leave the chroot and cleanup
+# RUN exit
+# RUN umount /mnt/dev
+# RUN umount /mnt/proc
+# RUN umount /mnt/sys
+# RUN sync
+# RUN umount /mnt/boot
+# RUN unmount /mnt
+# RUN losetup -d /dev/"${RPILOOP}"

README.md

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+# Pileagoo
+
+An image for having a Raspberry Pi control an Elegoo saturn.
+
+This is based off of https://l9o.dev/posts/controlling-an-elegoo-mars-pro-remotely/
+
+This particular image is principally aimed at the Raspberry Pi (512M original Rev) with a wifi dongle.
+
+## Building
+
+1. Download the raspberry image and link rpi.img to that file
+2. Run the following commands
+
+```
+# Creates root.tar.gz and boot.tar.gz
+sudo ./scripts/extract_root.sh
+# Run the build
+podman build --rm=false --platform linux/armv/v7 -t localhost/pileogoo .
+CONTAINERID=$(podman create localhost/pileogoo /bin/bash)
+podman export -o build/root.tar.gz "${CONTAINERID}"
+# Creates a new image from the exported copy
+sudo ./scripts/extra_build.sh
+rm ./build/all.tar
+```
+
+### Errors
+
+standard_init_linux.go:228: exec user process caused: exec format error
+
+ * this is caused by the image not matching the architecture: make sure you
+ can run non-native archiectures by checking the Installation steps.
+
+## Installation
+
+Install `qemu-system-arm`, `qemu-user-static`, and `qemu-user-binfmt` to provide
+arm architectures.
+
+Note that not all versions of the Raspberry Pi are supported in qemu. For eg.
+
+```
+$ qemu-system-arm -M help | grep rasp
+raspi0               Raspberry Pi Zero (revision 1.2)
+raspi1ap             Raspberry Pi A+ (revision 1.1)
+raspi2               Raspberry Pi 2B (revision 1.1) (alias of raspi2b)
+raspi2b              Raspberry Pi 2B (revision 1.1)
+```
+

scripts/extract_build.sh

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+#!/bin/bash +ex
+
+dd if=/dev/zero of=build/rpi.img bs=1M count=4096
+# Copy the first 8k from the original rpi.img, which seems to have
+# non-zeroed content
+#dd if=rpi.img of=build/rpi.img bs=8192 count=1 conv=notrunc
+sudo losetup -Pf build/rpi.img
+# Partition:
+# start: 8192, size 256M typ  W95 FAT32
+DEVICE=$(losetup -j build/rpi.img | cut -d ':' -f 1)
+mkfs.msdos "${DEVICE}"
+sfdisk "${DEVICE}" <<EOF
+8192,256M,c
+,3.5G,83
+EOF
+mkfs.vfat "${DEVICE}p1"
+mkfs.ext4 "${DEVICE}p2"
+TMP=$(mktemp -d)
+mount "${DEVICE}p1" "$TMP"
+tar -C "$TMP" -xf build/all.tar --strip=1 boot/
+umount "$TMP"
+mount "${DEVICE}p2" "$TMP"
+tar -C "$TMP" -xf build/all.tar --exclude='boot/*'
+umount "$TMP"
+losetup -D "${DEVICE}"
+rm -rf "$TMP"

scripts/extract_root.sh

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+#!/bin/bash
+
+TMPDIR=$(mktemp -d)
+losetup -Pf rpi.img
+LODEVICE=$(losetup -j rpi.img | cut -d ':' -f 1)
+mount "${LODEVICE}p2" "${TMPDIR}"
+tar -C "${TMPDIR}" -czf root.tar.gz .
+mount "${LODEVICE}p1" "${TMPDIR}/boot"
+tar -C "${TMPDIR}/boot" -czf boot.tar.gz .
+umount "${TMPDIR}/boot"
+umount "${TMPDIR}"
+rm -rf "${TMPDIR}"
+losetup -D "${LODEVICE}"