This is from GPT, anyone knows if that is true?

ULP code cannot call functions from the main app unless you provide ULP-specific copies and include them in the ULP build step.

On the CMAKE file I see that the CMAKE_FLAGS get ULP_S_SOURCES flag, which might indicate on Assembly sources.
Does anyone knows if C files also supported?

https://github.com/espressif/esp-idf/bl ... .cmake#L61

So I tried both:

set(ulp_sources "../ulp/ulp_main.c bpw34/bpw34.c")
and
set(ulp_sources "../ulp/ulp_main.c" "bpw34/bpw34.c")
While the following is:
ulp_embed_binary(${ulp_app_name} "${ulp_sources}" "${ulp_exp_dep_srcs}")


And it seems to keep the error:
/Users/xxx/.platformio/packages ...

Of course(?), when specifying the C source files to be built for the ULP, you have to specify all the source files you want to be compiled and linked into the ULP code.

What do you mean by specifying the C source files? isn't my src/CMakeLists.txt looks fine?
idf_component_register(SRCS
"lora ...

Hi all,

I’m working with ESP32-S3 and using ULP RISC-V. I'm using PlatformIO (which uses idf.py). I've encountered a couple of issues in the linker stage, which I cannot find any documentation on.

ulp_main.h Not Generated Unless ULP Source is Outside src/ :
My project layout uses a src/ folder ...

It will be fixed in the next framework-espressif update, I am opening a PR for platformio to have v5.4.2 soon.

Thanks

After tons of debugging, I found the issue.
The issue lies in the initialization of the new ADC Unit code. The default is LP and not RISC-V.
This bug has been fixed in this PR: https://github.com/espressif/esp-idf/commit/6858b37f5108608fac59e8220e9fd6a54297e272

Platformio is still pulling an older ...

I am calling to `esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);` of course

Thanks @MicroController , I used the same example to build my program. Do you see anything I am missing on my end by any chance?

Hi all,
I am trying to write a simple program for reading ADC1CH6 while in deep sleep using ULP RISC-V.
For some reason, the "adc read" function is hanging. Removing it, I can verify that everything works well (going to sleep, setting variable on ULP and waking the main CPU, accessing the variable ...