Initial commit

.gitignore

+build/

.gitmodules

+[submodule "buildroot"]
+	path = buildroot
+	url = https://gitlab.com/buildroot.org/buildroot.git

COPYING

+With the exceptions below, Buildroot is distributed under the terms of
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+Some files in Buildroot contain a different license statement. Those
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+Buildroot also bundles patch files, which are applied to the sources
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+Public License instead of this License.

Config.in

+source "$BR2_EXTERNAL_RGBMATRIX_PATH/package/rpi-rgbmatrix/Config.in"
+source "$BR2_EXTERNAL_RGBMATRIX_PATH/package/python-rgbmatrix/Config.in"
+source "$BR2_EXTERNAL_RGBMATRIX_PATH/package/busdisplay/Config.in"

README.md

+# RGB-Matrix/Bahnanzeige auf Buildroot
+
+Dies hier ist ein Versuch, unsere Bahnanzeige ([Code], [wiki-intern]) ohne Sauerteiglinux[^1] zu bauen.
+
+[Code]: https://git.ccc.ac/clonejo/busdisplay/
+[wiki-intern]: https://wiki-intern.aachen.ccc.de/doku.php?id=rgbmatrix
+
+[^1]: _Sauerteiglinux_: Man hat eine Installation die man über lange Zeit
+    pflegt, aber nicht ohne weiteres neu bauen kann. Wann man eine zweite
+    braucht, kopiert man die SD-Karte.
+
+
+## Bauen
+
+- `./setup.sh`
+- `./make -j5`
+- in `buildroot/output/images` schauen
+
+## Optionen ändern
+
+- `./make nconfig` (oder `menuconfig`/`xconfig`/...)
+- `./make savedefconfig`
+
+## Installation
+
+- TODO
+
+
+## TODO
+
+- config
+  - [ ] kernel (mainline)
+  - [ ] rpi-firmware
+  - [ ] python3
+  - [ ] C++ toolchain
+  - [ ] DHCP mit Gerätenamen (rgbmatrix)
+  - [ ] NTP: das ding bekommt eine korrekte Uhrzeit
+  - [ ] SSH-Login
+  - [ ] MOTD mit einigen Hinweisen
+  - [ ] auto-start things
+- packages
+  - [ ] rgbmatrix library
+  - [ ] fonts
+  - [ ] busdisplay
+  - [ ] demos
+- [ ] CI

buildroot @ 0155095c

+Subproject commit 0155095c558e915d6c5261a4d8cb4ec9ee9953a7

configs/rgbmatrix_defconfig

+BR2_arm=y
+BR2_cortex_a7=y
+BR2_ARM_FPU_NEON_VFPV4=y
+BR2_ARM_INSTRUCTIONS_THUMB2=y
+BR2_TOOLCHAIN_BUILDROOT_MUSL=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_CCACHE=y
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
+BR2_PER_PACKAGE_DIRECTORIES=y
+BR2_ROOTFS_MERGED_USR=y
+BR2_SYSTEM_DHCP="eth0"
+BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_DEFCONFIG="bcm2835"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2836-rpi-2-b"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_PACKAGE_RPI_FIRMWARE=y
+BR2_PACKAGE_RPI_FIRMWARE_BOOTCODE_BIN=y
+BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI=y
+BR2_PACKAGE_RPI_FIRMWARE_CONFIG_FILE="board/raspberrypi/config_default.txt"
+# BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
+BR2_PACKAGE_PYTHON3=y
+BR2_PACKAGE_PYTHON_DATEUTIL=y
+BR2_PACKAGE_PYTHON_REQUESTS=y
+BR2_PACKAGE_DROPBEAR=y
+# BR2_PACKAGE_DROPBEAR_CLIENT is not set
+# BR2_PACKAGE_DROPBEAR_SMALL is not set
+BR2_PACKAGE_NTP=y
+BR2_PACKAGE_NTP_NTPDC=y
+BR2_TARGET_ROOTFS_CPIO=y
+BR2_TARGET_ROOTFS_CPIO_ZSTD=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_PACKAGE_RPI_RGBMATRIX_INSTALL_FONTS="5x8.bdf 6x9.bdf"
+BR2_PACKAGE_PYTHON_RGBMATRIX=y

external.desc

+name: RGBMATRIX
+desc: CCCAC RGB Matrix

external.mk

+include $(sort $(wildcard $(BR2_EXTERNAL_RGBMATRIX_PATH)/package/*/*.mk))

make

+#!/bin/sh
+exec make -C buildroot "$@"

package/busdisplay/Config.in

+config BR2_PACKAGE_BUSDISPLAY
+	bool "busdisplay"
+	select BR2_PACKAGE_PYTHON_RGBMATRIX
+	select BR2_PACKAGE_PYTHON_DATEUTIL
+	select BR2_PACKAGE_PYTHON_REQUESTS
+	help
+	  The CCCAC busdisplay package shows departing trains from Aachen Hbf.
+
+	  https://git.ccc.ac/clonejo/busdisplay

package/busdisplay/busdisplay.mk

+################################################################################
+#
+# busdisplay
+#
+################################################################################
+
+BUSDISPLAY_VERSION = a13602fd7f6988784f945d0c090dd84a044b7d2f  # 2023-12-20
+BUSDISPLAY_SITE = https://git.ccc.ac/clonejo/busdisplay/-/archive/${BUSDISPLAY_VERSION}
+BUSDISPLAY_LICENSE = MIT
+BUSDISPLAY_LICENSE_FILES = LICENSES/MIT.txt
+
+define BUSDISPLAY_BUILD_CMDS
+	cp $(@D)/busdisplay.py $(@D)/busdisplay
+endef
+
+define BUSDISPLAY_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/busdisplay $(TARGET_DIR)/usr/bin
+endef
+
+$(eval $(generic-package))

package/python-rgbmatrix/Config.in

+config BR2_PACKAGE_PYTHON_RGBMATRIX
+	bool "python-rgbmatrix"
+	select BR2_PACKAGE_HOST_PYTHON_CYTHON
+	select BR2_PACKAGE_RPI_RGBMATRIX

package/python-rgbmatrix/python-rgbmatrix.mk

+################################################################################
+#
+# python-rgbmatrix
+# TODO: use upstream buildroot package for rpi-rgb-led-matrix
+# TODO: try a newer library version
+#
+################################################################################
+
+PYTHON_RGBMATRIX_VERSION = a56338db0f003d5236f2ce98c73a591d64a70852 # 2022-01-03
+PYTHON_RGBMATRIX_SITE = $(call github,hzeller,rpi-rgb-led-matrix,$(PYTHON_RGBMATRIX_VERSION))
+PYTHON_RGBMATRIX_LICENSE = GPL-2.0
+PYTHON_RGBMATRIX_LICENSE_FILES = COPYING
+PYTHON_RGBMATRIX_INSTALL_STAGING = YES
+PYTHON_RGBMATRIX_SETUP_TYPE = setuptools
+PYTHON_RGBMATRIX_SUBDIR = bindings/python
+PYTHON_RGBMATRIX_DEPENDENCIES = host-python-cython rpi-rgbmatrix
+
+# Re-generate cython-generated files
+define PYTHON_RGBMATRIX_CYTHON
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D)/bindings/python/rgbmatrix \
+		CYTHON=$(HOST_DIR)/bin/cython -B all
+endef
+PYTHON_RGBMATRIX_PRE_BUILD_HOOKS += PYTHON_RGBMATRIX_CYTHON
+
+$(eval $(python-package))

package/rpi-rgbmatrix/Config.in

+config BR2_PACKAGE_RPI_RGBMATRIX
+	bool "rpi-rgbmatrix"
+	depends on BR2_aarch64 || BR2_arm
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_STATIC_LIBS
+	help
+	  A library to control commonly available 64x64, 32x32 or 16x32
+	  RGB LED panels with the Raspberry Pi. Can support PWM up to
+	  11Bit per channel, providing true 24bpp color with CIE1931
+	  profile.
+
+	  https://github.com/hzeller/rpi-rgb-led-matrix
+
+if BR2_PACKAGE_RPI_RGBMATRIX
+
+config BR2_PACKAGE_RPI_RGBMATRIX_INSTALL_FONTS
+	string "Install fonts"
+	help
+	  Space separated list of font files to install to the target, e.g. "6x10.bdf".
+
+config BR2_PACKAGE_RPI_RGBMATRIX_IMAGE_VIEWER
+	bool "Build led-image-viewer"
+	select BR2_PACKAGE_GRAPHICSMAGICK
+	help
+	  The image viewer reads all kinds of image formats,
+	  including animated gifs.
+
+config BR2_PACKAGE_RPI_RGBMATRIX_TEXT_SCROLLER
+	bool "Build text-scroller"
+	help
+	  The text scroller allows to show some scrolling text.
+
+config BR2_PACKAGE_RPI_RGBMATRIX_VIDEO_VIEWER
+	bool "Build video-viewer"
+	select BR2_PACKAGE_FFMPEG
+	select BR2_PACKAGE_FFMPEG_SWSCALE
+	help
+	  The video viewer allows to play common video formats
+	  on the RGB matrix (just the picture, no sound).
+
+endif
+
+comment "rpi-rgb-led-matrix needs a toolchain w/ C++, threads, dynamic library"
+	depends on BR2_aarch64 || BR2_arm
+	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_HAS_THREADS || \
+		BR2_STATIC_LIBS

package/rpi-rgbmatrix/rpi-rgbmatrix.mk

+################################################################################
+#
+# rpi-rgb-led-matrix (copy)
+# TODO: use upstream buildroot package
+# TODO: try a newer library version
+#
+################################################################################
+
+#RPI_RGBMATRIX_VERSION = a56338db0f003d5236f2ce98c73a591d64a70852
+RPI_RGBMATRIX_VERSION = 067eb9594c0c24d7be80ffb96b6bdb6c6be00875  # 2018-05-02
+RPI_RGBMATRIX_SITE = $(call github,hzeller,rpi-rgb-led-matrix,$(RPI_RGBMATRIX_VERSION))
+RPI_RGBMATRIX_LICENSE = GPL-2.0
+RPI_RGBMATRIX_LICENSE_FILES = COPYING
+RPI_RGBMATRIX_INSTALL_STAGING = YES
+
+RPI_RGBMATRIX_MAKE_OPTS = \
+	$(TARGET_CONFIGURE_OPTS) \
+	CXXFLAGS="$(TARGET_CXXFLAGS) -fPIC -std=c++11"
+
+define RPI_RGBMATRIX_BUILD_CMDS
+	$(MAKE) $(RPI_RGBMATRIX_MAKE_OPTS) -C $(@D)/lib all
+endef
+
+define RPI_RGBMATRIX_INSTALL_STAGING_CMDS
+	$(INSTALL) -d -m 0755 $(STAGING_DIR)/usr/include/rpi-rgb-led-matrix/
+	$(INSTALL) -m 0644 $(@D)/include/*.h $(STAGING_DIR)/usr/include/rpi-rgb-led-matrix/
+	$(INSTALL) -D -m 0644 $(@D)/lib/librgbmatrix.a $(STAGING_DIR)/usr/lib/librgbmatrix.a
+	$(INSTALL) -D -m 0755 $(@D)/lib/librgbmatrix.so.1 $(STAGING_DIR)/usr/lib/librgbmatrix.so.1
+	ln -sf librgbmatrix.so.1 $(STAGING_DIR)/usr/lib/librgbmatrix.so
+endef
+
+define RPI_RGBMATRIX_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/lib/librgbmatrix.so.1 $(TARGET_DIR)/usr/lib/librgbmatrix.so.1
+	ln -sf librgbmatrix.so.1 $(TARGET_DIR)/usr/lib/librgbmatrix.so
+	for font in $(call qstrip,$(BR2_PACKAGE_RPI_RGBMATRIX_INSTALL_FONTS)); do \
+		$(INSTALL) -D -m644 $(@D)/fonts/$$font $(TARGET_DIR)/usr/share/fonts/bdf; \
+	done
+endef
+
+ifeq ($(BR2_PACKAGE_RPI_RGBMATRIX_IMAGE_VIEWER),y)
+RPI_RGBMATRIX_DEPENDENCIES += graphicsmagick
+
+define RPI_RGBMATRIX_BUILD_IMAGE_VIEWER_CMDS
+	$(MAKE) $(RPI_RGBMATRIX_MAKE_OPTS) \
+		MAGICK_CXXFLAGS="-I$(STAGING_DIR)/usr/include/GraphicsMagick $(shell $(STAGING_DIR)/usr/bin/GraphicsMagick++-config --cxxflags)" \
+		MAGICK_LDFLAGS="-L$(STAGING_DIR)/usr/lib $(shell $(STAGING_DIR)/usr/bin/GraphicsMagick++-config --libs)" \
+		-C $(@D)/utils led-image-viewer
+endef
+RPI_RGBMATRIX_POST_BUILD_HOOKS += RPI_RGBMATRIX_BUILD_IMAGE_VIEWER_CMDS
+
+define RPI_RGBMATRIX_INSTALL_IMAGE_VIEWER_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/utils/led-image-viewer $(TARGET_DIR)/usr/bin/led-image-viewer
+endef
+RPI_RGBMATRIX_POST_INSTALL_TARGET_HOOKS += RPI_RGBMATRIX_INSTALL_IMAGE_VIEWER_CMDS
+endif
+
+ifeq ($(BR2_PACKAGE_RPI_RGBMATRIX_TEXT_SCROLLER),y)
+define RPI_RGBMATRIX_BUILD_TEXT_SCROLLER_CMDS
+	$(MAKE) $(RPI_RGBMATRIX_MAKE_OPTS) -C $(@D)/utils text-scroller
+endef
+RPI_RGBMATRIX_POST_BUILD_HOOKS += RPI_RGBMATRIX_BUILD_TEXT_SCROLLER_CMDS
+
+define RPI_RGBMATRIX_INSTALL_TEXT_SCROLLER_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/utils/text-scroller $(TARGET_DIR)/usr/bin/text-scroller
+	$(INSTALL) -d -m 0755 $(TARGET_DIR)/usr/share/rpi-rgb-led-matrix/fonts/
+	$(INSTALL) -m 0644 $(@D)/fonts/*.bdf $(TARGET_DIR)/usr/share/rpi-rgb-led-matrix/fonts/
+endef
+RPI_RGBMATRIX_POST_INSTALL_TARGET_HOOKS += RPI_RGBMATRIX_INSTALL_TEXT_SCROLLER_CMDS
+endif
+
+ifeq ($(BR2_PACKAGE_RPI_RGBMATRIX_VIDEO_VIEWER),y)
+RPI_RGBMATRIX_DEPENDENCIES += ffmpeg
+
+define RPI_RGBMATRIX_BUILD_VIDEO_VIEWER_CMDS
+	$(MAKE) $(RPI_RGBMATRIX_MAKE_OPTS) \
+		AV_CXXFLAGS="$(shell $(HOST_DIR)/bin/pkg-config --cflags libavcodec libavformat libswscale libavutil)" \
+		AV_LDFLAGS="$(shell $(HOST_DIR)/bin/pkg-config --libs libavcodec libavformat libswscale libavutil)" \
+		-C $(@D)/utils video-viewer
+endef
+RPI_RGBMATRIX_POST_BUILD_HOOKS += RPI_RGBMATRIX_BUILD_VIDEO_VIEWER_CMDS
+
+define RPI_RGBMATRIX_INSTALL_VIDEO_VIEWER_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/utils/video-viewer $(TARGET_DIR)/usr/bin/video-viewer
+endef
+RPI_RGBMATRIX_POST_INSTALL_TARGET_HOOKS += RPI_RGBMATRIX_INSTALL_VIDEO_VIEWER_CMDS
+endif
+
+$(eval $(generic-package))

setup.sh

+#!/bin/sh
+set -e
+
+git submodule update --init
+./make BR2_EXTERNAL=$PWD rgbmatrix_defconfig