From c5f301aa879bc52add50d8d5f917ee551fe1673e Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Wed, 26 Mar 2025 21:27:32 +0100
Subject: fw: app: Build as CMake External Project

This adopts this pattern from the bootloader build. It adds more
flexibility. It is assumed that in this way multiple builds for
different boards can easily be achieved.
---
 fw/CMakeLists.txt     | 41 +++++++++++++++++++++++++++++------------
 fw/app/CMakeLists.txt |  2 +-
 fw/nucleo.sh          | 17 ++++-------------
 imgtool.py            |  2 +-
 4 files changed, 35 insertions(+), 27 deletions(-)

diff --git a/fw/CMakeLists.txt b/fw/CMakeLists.txt
index 5b1e42b..aa5af1c 100644
--- a/fw/CMakeLists.txt
+++ b/fw/CMakeLists.txt
@@ -4,28 +4,45 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
+include(ExternalProject)
+
 set(KEY_DEFAULT "$ENV{HOME}/mcuboot/key.pem")
 set(KEY ${KEY_DEFAULT} CACHE STRING "Firmware signing key path")
 message(STATUS "Firmware signing key path: ${KEY}")
 
-set(BOARD "native_sim/native/64")
-add_subdirectory(rtos)
+set(BOARD_DEFAULT "native_sim/native/64")
+set(BOARD ${BOARD_DEFAULT} CACHE STRING "Zephyr board identifier")
+message(STATUS "Selected board: ${BOARD}")
 
+add_subdirectory(rtos)
 string(REPLACE ";" "," ZEPHYR_MODULES_COMMA "${ZEPHYR_MODULES}")
-include(ExternalProject)
+
+if(BOARD STREQUAL "nucleo_f767zi")
+	ExternalProject_Add(
+		btl
+		PREFIX btl
+		SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/rtos/modules/mcuboot/boot/zephyr"
+		BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/btl"
+		INSTALL_COMMAND ""
+		LIST_SEPARATOR ","
+		CMAKE_ARGS
+			"-DBOARD=${BOARD}"
+			"-DZEPHYR_BASE=${ZEPHYR_BASE}"
+			"-DZEPHYR_MODULES=${ZEPHYR_MODULES_COMMA}"
+			"-DEXTRA_CONF_FILE=${CMAKE_CURRENT_SOURCE_DIR}/btl/bootloader.conf"
+			-DCONFIG_BOOT_SIGNATURE_KEY_FILE="${KEY}"
+	)
+endif()
+
 ExternalProject_Add(
-	btl
-	PREFIX btl
-	SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/rtos/modules/mcuboot/boot/zephyr"
-	BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/btl"
+	app
+	PREFIX app
+	SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/app"
+	BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/app"
 	INSTALL_COMMAND ""
 	LIST_SEPARATOR ","
 	CMAKE_ARGS
-		"-DBOARD=nucleo_f767zi"
+		"-DBOARD=${BOARD}"
 		"-DZEPHYR_BASE=${ZEPHYR_BASE}"
 		"-DZEPHYR_MODULES=${ZEPHYR_MODULES_COMMA}"
-		"-DEXTRA_CONF_FILE=${CMAKE_CURRENT_SOURCE_DIR}/btl/bootloader.conf"
-		-DCONFIG_BOOT_SIGNATURE_KEY_FILE="${KEY}"
 )
-
-add_subdirectory(app)
diff --git a/fw/app/CMakeLists.txt b/fw/app/CMakeLists.txt
index ce10104..47f75f6 100644
--- a/fw/app/CMakeLists.txt
+++ b/fw/app/CMakeLists.txt
@@ -10,7 +10,7 @@ find_package(Zephyr
 		"${ZEPHYR_BASE}"
 )
 
-project(iot-contact-fw)
+project(iot-contact-app)
 
 target_sources(app
 	PRIVATE
diff --git a/fw/nucleo.sh b/fw/nucleo.sh
index b48b759..e89ff07 100755
--- a/fw/nucleo.sh
+++ b/fw/nucleo.sh
@@ -24,30 +24,21 @@ FW="$(dirname "$SCRIPT")"
 ROOT="$(dirname "$FW")"
 BUILD="${ROOT}/nucleo"
 BOOTLOADER_FIRMWARE="${BUILD}/fw/btl/zephyr/zephyr.bin"
-APPLICATION_FIRMWARE="${BUILD}/fw/zephyr/zephyr.bin"
-APPLICATION_FIRMWARE_SIGNED="${BUILD}/fw/zephyr/zephyr.signed.bin"
+APPLICATION_FIRMWARE="${BUILD}/fw/app/zephyr/zephyr.bin"
+APPLICATION_FIRMWARE_SIGNED="${BUILD}/fw/app/zephyr/zephyr.signed.bin"
 BOOTLOADER_FLASH_ADDRESS='0x8000000'
 APPLICATION_FLASH_ADDRESS='0x8040000'
-MCUBOOT="${ROOT}/fw/btl/mcuboot"
-IMGTOOL="${MCUBOOT}/scripts/imgtool.py"
+IMGTOOL="${ROOT}/imgtool.py"
 KEY="${HOME}/mcuboot/key.pem"
 BOARD='nucleo_f767zi'
-EXTRA_CONFIGS=''
 BAUDRATE='115200'
 SERIAL_PORT='/dev/ttyACM0'
-CONFIG_OVERLAY="${FW}/my.conf"
 
 
-if test -f "$CONFIG_OVERLAY"
-then
-	EXTRA_CONFIGS="${EXTRA_CONFIGS} ${CONFIG_OVERLAY}"
-fi
-
 set -x
 
 rm -rf "$BUILD"
-cmake "-B${BUILD}" -GNinja -DBOARD="$BOARD" \
-	-DEXTRA_CONF_FILE="${EXTRA_CONFIGS}" -DKEY="$KEY"
+cmake "-B${BUILD}" -GNinja -DBOARD="$BOARD"
 ninja -C "$BUILD"
 python "$IMGTOOL" sign \
 	--version 0.0.0 \
diff --git a/imgtool.py b/imgtool.py
index 32cacb4..bec4f37 120000
--- a/imgtool.py
+++ b/imgtool.py
@@ -1 +1 @@
-fw/zephyrproject/bootloader/mcuboot/scripts/imgtool.py
\ No newline at end of file
+fw/rtos/modules/mcuboot/scripts/imgtool.py
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2