Initial commit

Config.in

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+source "$BR2_EXTERNAL_ATOY_PATH/package/lora-gateway/Config.in"
+source "$BR2_EXTERNAL_ATOY_PATH/package/packet-forwarder/Config.in"

README.md

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+# a|toy Buildroot 2 external tree
+
+## TheThingsNetwork gateway
+
+This projet create an image for a raspberrypi board running the TTN packet forwarder. You need a SX1301 extension board.
+
+* Clone buildroot2
+* Clone this repository
+
+Then, generate the sdcard image :
+
+```bash
+cd /into/buildroot2
+make BR2_EXTERNAL=/this/repository ttngw_defconfig && make
+```
+
+You'll find the generated image into output/images/sdcard.img. Just "dd" it on your sdcard (or use etcher on OSX).

board/ttngw/genimage-ttngw.cfg

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+image boot.vfat {
+  vfat {
+    files = {
+      "bcm2710-rpi-3-b.dtb",
+      "bcm2710-rpi-3-b-plus.dtb",
+      "bcm2710-rpi-cm3.dtb",
+      "rpi-firmware/bootcode.bin",
+      "rpi-firmware/cmdline.txt",
+      "rpi-firmware/config.txt",
+      "rpi-firmware/fixup.dat",
+      "rpi-firmware/start.elf",
+      "rpi-firmware/overlays",
+      "zImage"
+    }
+  }
+  size = 32M
+}
+
+image sdcard.img {
+  hdimage {
+  }
+
+  partition boot {
+    partition-type = 0xC
+    bootable = "true"
+    image = "boot.vfat"
+  }
+
+  partition rootfs {
+    partition-type = 0x83
+    image = "rootfs.ext4"
+  }
+}

board/ttngw/post-build.sh

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+#!/bin/sh
+
+set -u
+set -e
+
+# Mount first partition to access config files
+if [ -e ${TARGET_DIR}/etc/fstab ]; then
+    if ! grep -qE '^\/dev\/mmcblk0p1' "${TARGET_DIR}/etc/fstab"; then
+        cat << __EOF__ >> "${TARGET_DIR}/etc/fstab"
+/dev/mmcblk0p1	/mnt		vfat	defaults,ro	0	0
+__EOF__
+    fi
+fi

board/ttngw/post-image.sh

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+#!/bin/bash
+
+set -e
+
+# Enable SPI
+if ! grep -qE '^dtparam=spi=on' "${BINARIES_DIR}/rpi-firmware/config.txt"; then
+	cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/config.txt"
+
+# enable SPI
+dtparam=spi=on
+__EOF__
+fi

board/ttngw/rootfs-overlay/etc/init.d/S10spi

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+#!/bin/sh
+#
+# Load SPI modules
+#
+
+start() {
+	printf "Load SPI kernel modules: "
+
+	modprobe spi-bcm2835
+	modprobe spidev
+}
+stop() {
+}
+
+restart() {
+	stop
+	start
+}
+
+case "$1" in
+  start)
+  	start
+	;;
+  stop)
+  	stop
+	;;
+  restart|reload)
+  	restart
+	;;
+  *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac
+
+exit $?

configs/ttngw_defconfig

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+BR2_arm=y
+BR2_cortex_a53=y
+BR2_ARM_FPU_NEON_VFPV4=y
+
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+
+BR2_SYSTEM_DHCP="eth0"
+
+# Linux headers same as kernel, a 4.14 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_14=y
+
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,c117a8bccf37bfba323065b566cf999ed4629a4a)/linux-c117a8bccf37bfba323065b566cf999ed4629a4a.tar.gz"
+BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
+
+# Build the DTB from the kernel sources
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2710-rpi-3-b bcm2710-rpi-3-b-plus bcm2710-rpi-cm3"
+
+BR2_PACKAGE_RPI_FIRMWARE=y
+
+# Required tools to create the SD image
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
+
+# Filesystem / image
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="128M"
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3/post-build.sh $(BR2_EXTERNAL_BAR_42_PATH)/board/ttngw/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL_BAR_42_PATH)/board/ttngw/post-image.sh board/raspberrypi3/post-image.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay"
+
+# TTNGW specific options and packages
+BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_BAR_42_PATH)/board/ttngw/rootfs-overlay"
+BR2_TARGET_GENERIC_ROOT_PASSWD="azerty"
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_DROPBEAR_DISABLE_REVERSEDNS=y
+BR2_PACKAGE_PACKET_FORWARDER=y

external.desc

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+name: ATOY
+desc: Custom projects using BR2

external.mk

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+include $(sort $(wildcard $(BR2_EXTERNAL_ATOY_PATH)/package/*/*.mk))

package/lora-gateway/Config.in

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+config BR2_PACKAGE_LORA_GATEWAY
+	bool "lora-gateway"
+	help
+	  This is the lora gateway package from The Things Network

package/lora-gateway/lora-gateway.mk

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+LORA_GATEWAY_VERSION = legacy
+LORA_GATEWAY_SITE = https://github.com/TheThingsNetwork/lora_gateway.git
+LORA_GATEWAY_INSTALL_STAGING = YES
+LORA_GATEWAY_SITE_METHOD = git
+
+define LORA_GATEWAY_CONFIGURE_CMDS
+    sed -i -e 's/PLATFORM= kerlink/PLATFORM= imst_rpi/g' $(@D)/libloragw/library.cfg
+endef
+
+define LORA_GATEWAY_BUILD_CMDS
+    CROSS_COMPILE=arm-buildroot-linux-uclibcgnueabihf- LD=$(TARGET_LD) $(TARGET_MAKE_ENV) $(MAKE) -C $(@D) all
+endef
+
+define LORA_GATEWAY_INSTALL_STAGING_CMDS
+   $(INSTALL) -d -m 0755 $(STAGING_DIR)/opt/ttn/libloragw
+   $(INSTALL) -D -m 0755 $(@D)/libloragw/library.cfg $(STAGING_DIR)/opt/ttn/libloragw/library.cfg
+   $(INSTALL) -D -m 0755 $(@D)/libloragw/libloragw.a $(STAGING_DIR)/opt/ttn/libloragw/libloragw.a
+   $(INSTALL) -d -m 0755 $(STAGING_DIR)/opt/ttn/libloragw/inc
+   $(INSTALL) -D -m 0755 $(@D)/libloragw/inc/*.h $(STAGING_DIR)/opt/ttn/libloragw/inc/
+endef
+
+define LORA_GATEWAY_INSTALL_TARGET_CMDS
+endef
+
+$(eval $(generic-package))

package/packet-forwarder/Config.in

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+config BR2_PACKAGE_PACKET_FORWARDER
+	bool "packet-forwarder"
+	select BR2_PACKAGE_LORA_GATEWAY
+	help
+	  This is the lora packet forwarder package from The Things Network

package/packet-forwarder/S52packetforwarder

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+#!/bin/sh
+#
+# Starts Lora packet forwarder
+#
+
+# Allow a few customizations from a config file
+test -r /etc/default/packet-forwarder && . /etc/default/packet-forwarder
+
+reset_sx1301() {
+	echo "$SX1301_RESET_BCM_PIN"  > /sys/class/gpio/export
+	echo "out" > /sys/class/gpio/gpio$SX1301_RESET_BCM_PIN/direction
+	echo "0"   > /sys/class/gpio/gpio$SX1301_RESET_BCM_PIN/value
+	sleep 0.1
+	echo "1"   > /sys/class/gpio/gpio$SX1301_RESET_BCM_PIN/value
+	sleep 0.1
+	echo "0"   > /sys/class/gpio/gpio$SX1301_RESET_BCM_PIN/value
+	sleep 0.1
+	echo "$SX1301_RESET_BCM_PIN"  > /sys/class/gpio/unexport
+}
+
+start() {
+	printf "Starting LoRa packet forwarder: "
+	umask 077
+
+	reset_sx1301
+
+	cd /etc/ttn
+	start-stop-daemon -S -b -q -p /var/run/packet-forwarder.pid \
+		--exec /usr/bin/poly_pkt_fwd -- $PACKETFORWARDER_ARGS
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+stop() {
+	printf "Stopping LoRa packet forwarder: "
+	start-stop-daemon -K -q -p /var/run/packet-forwarder.pid
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+restart() {
+	stop
+	start
+}
+
+case "$1" in
+  start)
+  	start
+	;;
+  stop)
+  	stop
+	;;
+  restart|reload)
+  	restart
+	;;
+  *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac
+
+exit $?

package/packet-forwarder/packet-forwarder

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+# GPIO connected to SW1301 reset pin
+SX1301_RESET_BCM_PIN=17

package/packet-forwarder/packet-forwarder.mk

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+PACKET_FORWARDER_VERSION = legacy
+PACKET_FORWARDER_SITE = https://github.com/TheThingsNetwork/packet_forwarder.git
+PACKET_FORWARDER_SITE_METHOD = git
+PACKET_FORWARDER_DEPENDENCIES = lora-gateway
+
+define PACKET_FORWARDER_CONFIGURE_CMDS
+endef
+
+define PACKET_FORWARDER_BUILD_CMDS
+    LGW_PATH=$(STAGING_DIR)/opt/ttn/libloragw CROSS_COMPILE=$(TARGET_CROSS) LD=$(TARGET_LD) $(TARGET_MAKE_ENV) $(MAKE) -C $(@D) all
+endef
+
+define PACKET_FORWARDER_INSTALL_TARGET_CMDS
+    $(INSTALL) -D -m 0755 $(@D)/poly_pkt_fwd/poly_pkt_fwd $(TARGET_DIR)/usr/bin/poly_pkt_fwd
+    $(INSTALL) -D -m 0644 $(@D)/poly_pkt_fwd/global_conf.json $(TARGET_DIR)/etc/ttn/global_conf.json
+    $(INSTALL) -D -m 0644 package/thethingsnetwork/packet-forwarder/packet-forwarder $(TARGET_DIR)/etc/default/packet-forwarder
+endef
+
+define PACKET_FORWARDER_INSTALL_INIT_SYSV
+        $(INSTALL) -D -m 755 package/thethingsnetwork/packet-forwarder/S52packetforwarder \
+                $(TARGET_DIR)/etc/init.d/S52packetforwarder
+endef
+
+$(eval $(generic-package))