Hello,
I am working with ESP32 devices and wanting to use both the Arduino and the esp-idf frameworks. I haven’t had any problems in setting up projects for one or the other, however I am facing an issue when trying to use both within the same project.
Details
I have a project whose purpose is mainly to run a series of Unit tests and I wanted to run tests in both Arduino and esp-idf frameworks. For this purpose, my platformio.ini file looks something like this (Simplified to omit irrelevant bits):
; Common options for all the environments
[env]
monitor_speed = 115200
monitor_echo = true
monitor_eol = LF
; Common options for all the esp32 arduino environments
[esp32_arduino_common]
platform = espressif32@5.0.0
board = m5stack-core2
framework = arduino
build_flags =
-DARDUINO_LOOP_STACK_SIZE=32768
-DACTIVE_FRAMEWORK=ARDUINO
test_framework = custom
lib_deps =
; here are some libs that I omitted
[env:arduino_esp32_blue]
extends = esp32_arduino_common
build_flags =
${esp32_arduino_common.build_flags}
-DCOLOUR=BLUE
; Common for all the esp-idf environments
[esp32_espidf_common]
platform = espressif32 @6.4.0 # Make sure it uses esp-idf = 5.1.0
board = m5stack-core2
framework = espidf
test_framework = custom
build_flags =
-DACTIVE_FRAMEWORK=ESPIDF
[env:espidf_blue]
extends = esp32_espidf_common
build_flags =
${esp32_espidf_common.build_flags}
-DCOLOUR=BLUE
Then within the test directory, I have a series of test_xyz.h files and a test_main.cpp that takes care of running the tests. The latter looks like this:
#include "test_functions.h"
#if (ACTIVE_FRAMEWORK == ARDUINO)
void setup() {
delay(2000);
run_test_functions();
}
void loop() {
}
#elif (ACTIVE_FRAMEWORK == ESPIDF)
void app_main() {
run_test_functions();
}
#endif
Where run_test_functions() takes care of calling unity begin/end.
Issue
If I run my tests with this configuration, arduino_esp32_blue works fine, espidf_blue fails to compile.
If I run my tests by renaming test_main.cpp to test_main.c, espidf_blue works fine, arduino_esp32_blue fails to compile.
It is clear that when using arduino as framework, a C++ compiler must be used (unsurprisingly I’d add), whereas when using esp-idf, a C compiler is preferable (in this specific situation).
The issue seems to be that both configurations can only be compiled for either C or C++.
I want to avoid adapting my C code, that runs perfectly for esp-idf, to C++ for the sake of the compiler.
Attempted solutions
I tried to define two different main files, one for each framework (test_main.cpp, test_main_c.c) and filter the files by adding either of the following options in the platformio.ini file:
-
build_src_filter = -<test/test_main.cpp> -
test_ignore = test_main.cpp
With no success.
Question
Simply put, is there a way to tell platformio to “compile this env for C++, compile this other env for C”? Or alternatively “Use this main.cpp for this env and this other main.c for this other env”?