samples: zbus: ipc_forwarder: Add support for nrf5340bsim target

Adds support for running the Zbus IPC forwarder sample on the nrf5340bsim
simulation platform to enable development and CI without physical hardware.

Signed-off-by: Trond F. Christiansen <[email protected]>

Author: Trond-F-Christiansen

samples/subsys/zbus/ipc_forwarder/Kconfig.sysbuild

@@ -10,6 +10,7 @@ choice
 	prompt "Remote board target"
 	default REMOTE_BOARD_NRF54H20_CPURAD if BOARD = "nrf54h20dk"
 	default REMOTE_BOARD_NRF5340_CPUNET if BOARD = "nrf5340dk"
+	default REMOTE_BOARD_NRF5340_CPUNET_SIM if BOARD = "nrf5340bsim"
 
 config REMOTE_BOARD_NRF54H20_CPURAD
 	bool "nrf54h20dk/nrf54h20/cpurad"
@@ -28,6 +29,12 @@ config REMOTE_BOARD_NRF54H20_CPUFLPR_XIP
 config REMOTE_BOARD_NRF5340_CPUNET
 	bool "nrf5340dk/nrf5340/cpunet"
 
+config REMOTE_BOARD_NRF5340_CPUNET_SIM
+	bool "nrf5340bsim/nrf5340/cpunet"
+	help
+	  Use this option to run the sample on nRF5340 CPU network simulator target.
+	  This option is useful for development and testing without requiring physical hardware.
+
 endchoice
 
 config REMOTE_BOARD
@@ -36,4 +43,5 @@ config REMOTE_BOARD
 	default "nrf54h20dk/nrf54h20/cpuppr" if REMOTE_BOARD_NRF54H20_CPUPPR
 	default "nrf54h20dk/nrf54h20/cpuppr/xip" if REMOTE_BOARD_NRF54H20_CPUPPR_XIP
 	default "nrf54h20dk/nrf54h20/cpuflpr/xip" if REMOTE_BOARD_NRF54H20_CPUFLPR_XIP
-	default "nrf5340dk/nrf5340/cpunet" if REMOTE_BOARD_NRF5340_CPUNET
+	default "nrf5340dk/nrf5340/cpunet" if REMOTE_BOARD_NRF5340_CPUNET
+	default "nrf5340bsim/nrf5340/cpunet" if REMOTE_BOARD_NRF5340_CPUNET_SIM

samples/subsys/zbus/ipc_forwarder/boards/nrf5340bsim_nrf5340_cpuapp.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_SOC_NRF53_CPUNET_ENABLE=y

samples/subsys/zbus/ipc_forwarder/sysbuild.cmake

@@ -36,6 +36,12 @@ ExternalZephyrProject_Add(
 	BOARD_REVISION ${BOARD_REVISION}
 )
 
+# Configure BabbleSim multi-core setup for nrf5340bsim targets
+if("${SB_CONFIG_REMOTE_BOARD}" MATCHES "nrf5340bsim")
+  native_simulator_set_child_images(${DEFAULT_IMAGE} remote_app)
+  native_simulator_set_final_executable(${DEFAULT_IMAGE})
+endif()
+
 # Setup PM partitioning for remote
 set_property(GLOBAL APPEND PROPERTY PM_DOMAINS REMOTE)
 set_property(GLOBAL APPEND PROPERTY PM_REMOTE_IMAGES remote_app)