samples: subsys: Fix ESP32 SoCs support

Fix ESP32 and ESP32-S3 support:

* Add Espressif overlays for default and remote target.
* Add remote targets for Espressif boards.
* Fix remote runtime by increasing the stack size in case of ESP32.
* Make the test cycle config option.
* Make the test stacks config options.

Signed-off-by: Marek Matej <[email protected]>

Author: Marek Matej

samples/subsys/ipc/rpmsg_service/CMakeLists.txt

@@ -15,9 +15,4 @@ message(STATUS "${BOARD} compile as Master in this sample")
 
 enable_language(C ASM)
 
-if("${BOARD}" STREQUAL "esp32_devkitc" OR "${BOARD}" STREQUAL "esp32s3_devkitm")
-  set_source_files_properties(${REMOTE_ZEPHYR_DIR}/esp32_net_firmware.c PROPERTIES GENERATED TRUE)
-  target_sources(app PRIVATE src/main.c ${REMOTE_ZEPHYR_DIR}/esp32_net_firmware.c)
-else()
-  target_sources(app PRIVATE src/main.c)
-endif()
+target_sources(app PRIVATE src/main.c)

samples/subsys/ipc/rpmsg_service/Kconfig

@@ -0,0 +1,13 @@
+# Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+source "Kconfig.zephyr"
+
+config RPMSG_SERVICE_DEMO_CYCLES
+	int "Number of demo message cycles"
+	default 1000
+	range 10 10000
+
+config MAIN_APP_TASK_STACK_SIZE
+	int "Main application task size"
+	default 1024

samples/subsys/ipc/rpmsg_service/Kconfig.sysbuild

@@ -9,3 +9,5 @@ config RPMSG_REMOTE_BOARD
 	default "mps2/an521/cpu1" if $(BOARD) = "mps2"
 	default "v2m_musca_b1/musca_b1/ns" if $(BOARD) = "v2m_musca_b1"
 	default "stm32h747i_disco/stm32h747xx/m4" if $(BOARD) = "stm32h747i_disco"
+	default "esp32_devkitc/esp32/appcpu" if $(BOARD) = "esp32_devkitc"
+	default "esp32s3_devkitc/esp32s3/appcpu" if $(BOARD) = "esp32s3_devkitc"

samples/subsys/ipc/rpmsg_service/remote/Kconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+source "samples/subsys/ipc/rpmsg_service/Kconfig"
+
+config APP_REMOTE_TASK_STACK_SIZE
+	int "Remote application task size"
+	default 2048 if SOC_SERIES_ESP32
+	default 1024

samples/subsys/ipc/rpmsg_service/remote/socs/esp32_procpu.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,ipc_shm = &shm0;
+		zephyr,ipc = &ipm0;
+	};
+};
+
+&ipm0 {
+	status = "okay";
+};

samples/subsys/ipc/rpmsg_service/remote/socs/esp32s3_procpu.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,ipc_shm = &shm0;
+		zephyr,ipc = &ipm0;
+	};
+};
+
+&ipm0 {
+	status = "okay";
+};

samples/subsys/ipc/rpmsg_service/remote/src/main.c

@@ -17,19 +17,17 @@
 
 #include <zephyr/ipc/rpmsg_service.h>
 
-#define APP_TASK_STACK_SIZE (1024)
-K_THREAD_STACK_DEFINE(thread_stack, APP_TASK_STACK_SIZE);
+K_THREAD_STACK_DEFINE(thread_stack, CONFIG_APP_REMOTE_TASK_STACK_SIZE);
 static struct k_thread thread_data;
 
 static volatile unsigned int received_data;
 
 static K_SEM_DEFINE(data_sem, 0, 1);
 static K_SEM_DEFINE(data_rx_sem, 0, 1);
 
-int endpoint_cb(struct rpmsg_endpoint *ept, void *data,
-		size_t len, uint32_t src, void *priv)
+int endpoint_cb(struct rpmsg_endpoint *ept, void *data, size_t len, uint32_t src, void *priv)
 {
-	received_data = *((unsigned int *) data);
+	received_data = *((unsigned int *)data);
 
 	k_sem_give(&data_rx_sem);
 
@@ -60,15 +58,14 @@ void app_task(void *arg1, void *arg2, void *arg3)
 
 	printk("\r\nRPMsg Service [remote] demo started\r\n");
 
-	while (message < 99) {
+	while (message < (CONFIG_RPMSG_SERVICE_DEMO_CYCLES - 1)) {
 		message = receive_message();
 		printk("Remote core received a message: %d\n", message);
 
 		message++;
 		status = send_message(message);
 		if (status < 0) {
-			printk("send_message(%d) failed with status %d\n",
-			       message, status);
+			printk("send_message(%d) failed with status %d\n", message, status);
 			break;
 		}
 	}
@@ -79,8 +76,7 @@ void app_task(void *arg1, void *arg2, void *arg3)
 int main(void)
 {
 	printk("Starting application thread!\n");
-	k_thread_create(&thread_data, thread_stack, APP_TASK_STACK_SIZE,
-			app_task,
+	k_thread_create(&thread_data, thread_stack, CONFIG_APP_REMOTE_TASK_STACK_SIZE, app_task,
 			NULL, NULL, NULL, K_PRIO_COOP(7), 0, K_NO_WAIT);
 	return 0;
 }

samples/subsys/ipc/rpmsg_service/sample.yaml

@@ -5,6 +5,8 @@ tests:
     platform_allow:
       - mps2/an521/cpu0
       - v2m_musca_b1/musca_b1
+      - esp32_devkitc/esp32/procpu
+      - esp32s3_devkitc/esp32s3/procpu
     integration_platforms:
       - mps2/an521/cpu0
       - v2m_musca_b1/musca_b1

samples/subsys/ipc/rpmsg_service/socs/esp32_procpu.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,ipc_shm = &shm0;
+		zephyr,ipc = &ipm0;
+	};
+};
+
+&ipm0 {
+	status = "okay";
+};

samples/subsys/ipc/rpmsg_service/socs/esp32s3_procpu.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,ipc_shm = &shm0;
+		zephyr,ipc = &ipm0;
+	};
+};
+
+&ipm0 {
+	status = "okay";
+};