FreeRTOS

ESP32-IDF_FreeRTOS/I2C_MultiDevice/.devcontainer/Dockerfile

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+ARG DOCKER_TAG=latest
+FROM espressif/idf:${DOCKER_TAG}
+
+ENV LC_ALL=C.UTF-8
+ENV LANG=C.UTF-8
+
+RUN apt-get update -y && apt-get install udev -y
+
+RUN echo "source /opt/esp/idf/export.sh > /dev/null 2>&1" >> ~/.bashrc
+
+ENTRYPOINT [ "/opt/esp/entrypoint.sh" ]
+
+CMD ["/bin/bash", "-c"]

ESP32-IDF_FreeRTOS/I2C_MultiDevice/.devcontainer/devcontainer.json

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+{
+	"name": "ESP-IDF QEMU",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"terminal.integrated.defaultProfile.linux": "bash",
+				"idf.espIdfPath": "/opt/esp/idf",
+				"idf.toolsPath": "/opt/esp",
+				"idf.gitPath": "/usr/bin/git"
+			},
+			"extensions": [
+				"espressif.esp-idf-extension",
+				"espressif.esp-idf-web"
+			]
+		}
+	},
+	"runArgs": ["--privileged"]
+}

ESP32-IDF_FreeRTOS/I2C_MultiDevice/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(I2C_MultiDevice)

ESP32-IDF_FreeRTOS/I2C_MultiDevice/README.md

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+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 | Linux |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- | ----- |
+
+# Hello World Example
+
+Starts a FreeRTOS task to print "Hello World".
+
+(See the README.md file in the upper level 'examples' directory for more information about examples.)
+
+## How to use example
+
+Follow detailed instructions provided specifically for this example.
+
+Select the instructions depending on Espressif chip installed on your development board:
+
+- [ESP32 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/index.html)
+- [ESP32-S2 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html)
+
+
+## Example folder contents
+
+The project **hello_world** contains one source file in C language [hello_world_main.c](main/hello_world_main.c). The file is located in folder [main](main).
+
+ESP-IDF projects are built using CMake. The project build configuration is contained in `CMakeLists.txt` files that provide set of directives and instructions describing the project's source files and targets (executable, library, or both).
+
+Below is short explanation of remaining files in the project folder.
+
+```
+├── CMakeLists.txt
+├── pytest_hello_world.py      Python script used for automated testing
+├── main
+│   ├── CMakeLists.txt
+│   └── hello_world_main.c
+└── README.md                  This is the file you are currently reading
+```
+
+For more information on structure and contents of ESP-IDF projects, please refer to Section [Build System](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html) of the ESP-IDF Programming Guide.
+
+## Troubleshooting
+
+* Program upload failure
+
+    * Hardware connection is not correct: run `idf.py -p PORT monitor`, and reboot your board to see if there are any output logs.
+    * The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
+
+## Technical support and feedback
+
+Please use the following feedback channels:
+
+* For technical queries, go to the [esp32.com](https://esp32.com/) forum
+* For a feature request or bug report, create a [GitHub issue](https://github.com/espressif/esp-idf/issues)
+
+We will get back to you as soon as possible.

ESP32-IDF_FreeRTOS/I2C_MultiDevice/main/CMakeLists.txt

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+idf_component_register(SRCS "hello_world_main.c"
+                    PRIV_REQUIRES spi_flash
+                    INCLUDE_DIRS "")

ESP32-IDF_FreeRTOS/I2C_MultiDevice/main/hello_world_main.c

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+/*
+ * SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include "sdkconfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_chip_info.h"
+#include "esp_flash.h"
+#include "esp_system.h"
+
+void app_main(void)
+{
+    printf("Hello world!\n");
+
+    /* Print chip information */
+    esp_chip_info_t chip_info;
+    uint32_t flash_size;
+    esp_chip_info(&chip_info);
+    printf("This is %s chip with %d CPU core(s), %s%s%s%s, ",
+           CONFIG_IDF_TARGET,
+           chip_info.cores,
+           (chip_info.features & CHIP_FEATURE_WIFI_BGN) ? "WiFi/" : "",
+           (chip_info.features & CHIP_FEATURE_BT) ? "BT" : "",
+           (chip_info.features & CHIP_FEATURE_BLE) ? "BLE" : "",
+           (chip_info.features & CHIP_FEATURE_IEEE802154) ? ", 802.15.4 (Zigbee/Thread)" : "");
+
+    unsigned major_rev = chip_info.revision / 100;
+    unsigned minor_rev = chip_info.revision % 100;
+    printf("silicon revision v%d.%d, ", major_rev, minor_rev);
+    if(esp_flash_get_size(NULL, &flash_size) != ESP_OK) {
+        printf("Get flash size failed");
+        return;
+    }
+
+    printf("%" PRIu32 "MB %s flash\n", flash_size / (uint32_t)(1024 * 1024),
+           (chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded" : "external");
+
+    printf("Minimum free heap size: %" PRIu32 " bytes\n", esp_get_minimum_free_heap_size());
+
+    for (int i = 10; i >= 0; i--) {
+        printf("Restarting in %d seconds...\n", i);
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+    printf("Restarting now.\n");
+    fflush(stdout);
+    esp_restart();
+}

ESP32-IDF_FreeRTOS/I2C_MultiDevice/pytest_hello_world.py

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+# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import hashlib
+import logging
+from typing import Callable
+
+import pytest
+from pytest_embedded_idf.dut import IdfDut
+from pytest_embedded_qemu.app import QemuApp
+from pytest_embedded_qemu.dut import QemuDut
+
+
+@pytest.mark.supported_targets
+@pytest.mark.preview_targets
+@pytest.mark.generic
+def test_hello_world(
+    dut: IdfDut, log_minimum_free_heap_size: Callable[..., None]
+) -> None:
+    dut.expect('Hello world!')
+    log_minimum_free_heap_size()
+
+
+@pytest.mark.linux
+@pytest.mark.host_test
+def test_hello_world_linux(dut: IdfDut) -> None:
+    dut.expect('Hello world!')
+
+
+@pytest.mark.linux
+@pytest.mark.host_test
+@pytest.mark.macos_shell
+def test_hello_world_macos(dut: IdfDut) -> None:
+    dut.expect('Hello world!')
+
+
+def verify_elf_sha256_embedding(app: QemuApp, sha256_reported: str) -> None:
+    sha256 = hashlib.sha256()
+    with open(app.elf_file, 'rb') as f:
+        sha256.update(f.read())
+    sha256_expected = sha256.hexdigest()
+
+    logging.info(f'ELF file SHA256: {sha256_expected}')
+    logging.info(f'ELF file SHA256 (reported by the app): {sha256_reported}')
+
+    # the app reports only the first several hex characters of the SHA256, check that they match
+    if not sha256_expected.startswith(sha256_reported):
+        raise ValueError('ELF file SHA256 mismatch')
+
+
+@pytest.mark.esp32  # we only support qemu on esp32 for now
+@pytest.mark.host_test
+@pytest.mark.qemu
+def test_hello_world_host(app: QemuApp, dut: QemuDut) -> None:
+    sha256_reported = (
+        dut.expect(r'ELF file SHA256:\s+([a-f0-9]+)').group(1).decode('utf-8')
+    )
+    verify_elf_sha256_embedding(app, sha256_reported)
+
+    dut.expect('Hello world!')