ESP8266 non-os SDK problems

1

I’m trying to call os_delay_us from the esp8266 sdk. However, I’m getting the following error:

lib/PCA9685Lib/PCA9685Lib.cpp: In member function 'uint8_t PCA9685::setSleep(bool)':
lib/PCA9685Lib/PCA9685Lib.cpp:39:24: error: 'ets_delay_us' was not declared in this scope
os_delay_us(600);
^
*** [.pioenvs/esp12e/lib/PCA9685Lib/PCA9685Lib.o] Error 1

It apparently is finding the header file “osapi.h” fine, because that is there os_delay_us is defined as ets_delay_us. However, it is missing the .ld file that has the location of that system call.

How do I fix this?

2

More information!

I’ve figured out that you need to explicitly pass a -T<ld script filename> flag to the linker, however, I don’t know how to do that for private libraries…

3

You need to create library.json file i nthe root of fodler and specify custom flags. See Redirecting...

4

Thanks!

For those that come before me, unfortunately this didn’t fix the problem. The problem was fixed by making sure that the esp headers were wrapped in extern "C" context.