Hardware: SD845 development kit.
Software: Hexagon SDK 3.3.3, nnlib.
Only the printf in android_release binary (the source code is in nnib/test/) works properly.
Those log command (alsl printf in the bottom level) in the hexogon so file (source code in nnlib/hexagon/src/ )doesn't print anything to the screen.
There is a hhexagon_nn_set_debug_level function, but I cannot find any instruction about what value means what?
I set it to several different values, 5, 16, 1024, 32767, but none of them works.
I also meet the question, did you slove it now ?