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docs: Add explanation of hello_world folder contents (v4.2)
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Krzysztof Budzynski
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@ -50,11 +50,16 @@ Hardware:
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Software:
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* **Toolchain** to compile code for {IDF_TARGET_NAME}
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* **Build tools** - CMake and Ninja to build a full **Application** for {IDF_TARGET_NAME}
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* **ESP-IDF** that essentially contains API (software libraries and source code) for {IDF_TARGET_NAME} and scripts to operate the **Toolchain**
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* **Text editor** to write programs (**Projects**) in C, e.g., `Eclipse <https://www.eclipse.org/>`_
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You have a choice to either download and install the following software manually
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* **Toolchain** to compile code for {IDF_TARGET_NAME}
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* **Build tools** - CMake and Ninja to build a full **Application** for {IDF_TARGET_NAME}
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* **ESP-IDF** that essentially contains API (software libraries and source code) for {IDF_TARGET_NAME} and scripts to operate the **Toolchain**
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**or** get through the onboarding process using the following official plugins for integrated development environments (IDE) described in separate documents
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* `Eclipse Plugin <https://github.com/espressif/idf-eclipse-plugin>`_ (`installation link <https://github.com/espressif/idf-eclipse-plugin#installing-idf-plugin-using-update-site-url>`_)
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* `VS Code Extension <https://github.com/espressif/vscode-esp-idf-extension>`_ (`onboarding <https://github.com/espressif/vscode-esp-idf-extension/blob/master/docs/ONBOARDING.md>`_)
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.. figure:: ../../_static/what-you-need.png
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:align: center
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@ -272,7 +277,7 @@ Step 5. Start a Project
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Now you are ready to prepare your application for {IDF_TARGET_NAME}. You can start with :example:`get-started/hello_world` project from :idf:`examples` directory in IDF.
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Copy :example:`get-started/hello_world` to ``~/esp`` directory:
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Copy the project :example:`get-started/hello_world` to ``~/esp`` directory:
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Linux and macOS
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~~~~~~~~~~~~~~~
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@ -400,7 +405,7 @@ This command will compile the application and all ESP-IDF components, then it wi
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../../../components/esptool_py/esptool/esptool.py -p (PORT) -b 921600 write_flash --flash_mode dio --flash_size detect --flash_freq 40m 0x10000 build/hello-world.bin build 0x1000 build/bootloader/bootloader.bin 0x8000 build/partition_table/partition-table.bin
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or run 'idf.py -p PORT flash'
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If there are no errors, the build will finish by generating the firmware binary .bin file.
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If there are no errors, the build will finish by generating the firmware binary .bin files.
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.. _get-started-flash:
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@ -408,7 +413,7 @@ If there are no errors, the build will finish by generating the firmware binary
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Step 9. Flash onto the Device
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=============================
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Flash the binaries that you just built onto your {IDF_TARGET_NAME} board by running:
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Flash the binaries that you just built (bootloader.bin, partition-table.bin and hello-world.bin) onto your {IDF_TARGET_NAME} board by running:
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.. code-block:: bash
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@ -531,7 +536,7 @@ When flashing, you will see the output log similar to the following:
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If there are no issues by the end of the flash process, the board will reboot and start up the “hello_world” application.
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If you'd like to use the Eclipse IDE instead of running ``idf.py``, check out the :doc:`Eclipse guide <eclipse-setup>`.
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If you'd like to use the Eclipse or VS Code IDE instead of running ``idf.py``, check out the :doc:`Eclipse guide <eclipse-setup>`, :doc:`VS Code guide <vscode-setup>`.
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.. _get-started-build-monitor:
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@ -395,7 +395,7 @@ Windows 操作系统
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第九步：烧录到设备
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=============================
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请使用以下命令，将刚刚生成的二进制文件烧录至您的 {IDF_TARGET_NAME} 开发板：
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请使用以下命令，将刚刚生成的二进制文件烧录 (bootloader.bin, partition-table.bin 和 hello-world.bin) 至您的 {IDF_TARGET_NAME} 开发板：
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``idf.py -p PORT [-b BAUD] flash``
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@ -1,5 +1,52 @@
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# Hello World Example
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Starts a FreeRTOS task to print "Hello World"
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Starts a FreeRTOS task to print "Hello World".
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See the README.md file in the upper level 'examples' directory for more information about examples.
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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## How to use example
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Follow detailed instructions provided specifically for this example.
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Select the instructions depending on Espressif chip installed on your development board:
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- [ESP32 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/index.html)
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- [ESP32-S2 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html)
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## Example folder contents
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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).
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ESP-IDF projects are build 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).
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Below is short explanation of remaining files in the project folder.
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```
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├── CMakeLists.txt
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├── example_test.py Python script used for automated example testing
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├── main
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│ ├── CMakeLists.txt
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│ ├── component.mk Component make file
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│ └── hello_world_main.c
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├── Makefile Makefile used by legacy GNU Make
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└── README.md This is the file you are currently reading
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```
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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.
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## Troubleshooting
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* Program upload failure
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* Hardware connection is not correct: run `idf.py -p PORT monitor`, and reboot your board to see if there are any output logs.
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* The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
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## Technical support and feedback
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Please use the following feedback channels:
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* For technical queries, go to the [esp32.com](https://esp32.com/) forum
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* For a feature request or bug report, create a [GitHub issue](https://github.com/espressif/esp-idf/issues)
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We will get back to you as soon as possible.
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