93 lines
3.1 KiB
ReStructuredText
93 lines
3.1 KiB
ReStructuredText
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##############################
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Arduino as a ESP-IDF component
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##############################
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ESP32 Arduino lib-builder
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-------------------------
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For a simplified method, see `lib-builder <lib_builder>`_.
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Installation
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------------
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- Download and install `ESP-IDF <https://github.com/espressif/esp-idf>`_.
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- Create blank idf project (from one of the examples).
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- In the project folder, create a new folder called `components` and clone this repository inside the new created folder.
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.. code-block:: bash
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mkdir -p components && \
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cd components && \
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git clone https://github.com/espressif/arduino-esp32.git arduino && \
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cd arduino && \
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git submodule update --init --recursive && \
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cd ../.. && \
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idf.py menuconfig
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- The `idf.py menuconfig` has some Arduino options.
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- On `Autostart Arduino setup and loop on boot`.
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- If you enable these options, your main.cpp should be formated like any other sketch.
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.. code-block:: c
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//file: main.cpp
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#include "Arduino.h"
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void setup(){
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Serial.begin(115200);
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}
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void loop(){
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Serial.println("loop");
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delay(1000);
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}
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- Otherwise, you need to implement ```app_main()``` and call ```initArduino();``` in it.
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Keep in mind that setup() and loop() will not be called in this case.
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If you plan to base your code on examples provided in `examples <https://github.com/espressif/esp-idf/tree/master/examples>`_, please make sure to move the app_main() function in main.cpp from the files in the example.
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.. code-block:: cpp
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//file: main.cpp
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#include "Arduino.h"
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extern "C" void app_main()
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{
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initArduino();
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pinMode(4, OUTPUT);
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digitalWrite(4, HIGH);
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//do your own thing
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}
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- "Disable mutex locks for HAL"
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- If enabled, there will be no protection on the drivers from concurently accessing them from another thread/interrupt/core
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- "Autoconnect WiFi on boot"
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- If enabled, WiFi will start with the last known configuration
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- Otherwise it will wait for WiFi.begin
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- ```idf.py -p <your-board-serial-port> flash monitor``` will build, upload and open serial monitor to your board
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Logging To Serial
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-----------------
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If you are writing code that does not require Arduino to compile and you want your `ESP_LOGx` macros to work in Arduino IDE, you can enable the compatibility by adding the following lines after:
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.. code-block:: c
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#ifdef ARDUINO_ARCH_ESP32
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#include "esp32-hal-log.h"
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#endif
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FreeRTOS Tick Rate (Hz)
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-----------------------
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You might notice that Arduino-esp32's `delay()` function will only work in multiples of 10ms. That is because, by default, esp-idf handles task events 100 times per second.
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To fix that behavior, you need to set FreeRTOS tick rate to 1000Hz in `make menuconfig` -> `Component config` -> `FreeRTOS` -> `Tick rate`.
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Compilation Errors
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------------------
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As commits are made to esp-idf and submodules, the codebases can develop incompatibilities which cause compilation errors. If you have problems compiling, follow the instructions in `Issue #1142 <https://github.com/espressif/arduino-esp32/issues/1142>`_ to roll esp-idf back to a different version.
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