mirror of
https://github.com/kakopappa/how-to-make-a-precompiled-arduino-library-for-esp8266-esp32.git
synced 2025-06-08 06:00:14 +03:00
53 lines
1.3 KiB
Markdown
53 lines
1.3 KiB
Markdown
Step 1:
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Create hello.cpp and hello.h and add the implementation.
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Example files are in lib folder.
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Step 2:
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Make the archive file (.a) using xtensa-esp32-elf-gcc.exe for ESP32 and use xtensa-lx106-elf-gcc for ESP8266
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xtensa-esp32-elf-gcc.exe -c hello.cpp -o libhello.o
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xtensa-esp32-elf-ar.exe crf libhello.a libhello.o
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Note: xtensa-esp32-elf-gcc.exe is located here if you have installed ESP32 in your arduino IDE.
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You may want to add this path to system env for easy access.
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C:\Users\<USERNAME>\AppData\Local\Arduino15\packages\esp32\tools\xtensa-esp32s2-elf-gcc\gcc8_4_0-esp-2021r2-patch3\bin\
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Now you should have a libhello.a in the path.
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Step 3:
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1. Make the library for Ardunio (arduino-helloworld-lib) and copy the header files (lib\hello.h) to library src folder (arduino-helloworld-lib\src).
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2. Copy the libhello.a to arduino-helloworld-lib\src\esp32 or arduino-helloworld-lib\src\esp8266 depending on which gcc you use to create the archive file.
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Step 4:
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Invoke the function from Ardunio sketch. example.ino
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#include <hello.h> // hello.h header from our library (arduino-helloworld-lib)
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#define BAUD_RATE 9600
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void setup() {
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Serial.begin(BAUD_RATE);
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}
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void loop() {
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// put your main code here, to run repeatedly:
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int result = add(1, 1); // Invokes the add function in libhello.a
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Serial.println(result);
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delay(1000);
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}
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