#include "mbed.h"

DigitalOut led1(LED1);
Serial ser(PA_2, PA_3, 115200);

// main() runs in its own thread in the OS
int main() {
    while (true) {
        led1 = !led1;
        wait(1);
     printf("Hello NUCLEO_L452RE \r\n");
	    uint32_t someuint = 0;
	    someuint++;
    }
}

++ MbedOS Error Info ++
Error Status: 0x80010133 Code: 307 Module: 1
Error Message: Mutex: 0x20000EEC, Unknown
Location: 0x80047BB
Error Value: 0x20000EEC
Current Thread: Id: 0x0 Entry: 0x8004871 StackSize: 0x0 StackMem: 0x8005C3D SP: 0x2001FE58
For more info, visit: https://armmbed.github.io/mbedos-error/?error=0x80010133
-- MbedOS Error Info --

I tried to create new target for STM NUCLEO L452RE board. After few hours and days, I can build first program without errors, but no program works. Fo example, simple code: <<code title=my code>> #include "mbed.h" DigitalOut led1(LED1); Serial ser(PA_2, PA_3, 115200); // main() runs in its own thread in the OS int main() { while (true) { led1 = !led1; wait(1); printf("Hello NUCLEO_L452RE \r\n"); uint32_t someuint = 0; someuint++; } } <</code>> And this is what I see on serial console after running program: <<code title=my console>> ++ MbedOS Error Info ++ Error Status: 0x80010133 Code: 307 Module: 1 Error Message: Mutex: 0x20000EEC, Unknown Location: 0x80047BB Error Value: 0x20000EEC Current Thread: Id: 0x0 Entry: 0x8004871 StackSize: 0x0 StackMem: 0x8005C3D SP: 0x2001FE58 For more info, visit: https://armmbed.github.io/mbedos-error/?error=0x80010133 -- MbedOS Error Info -- <</code>> Today I think that I will give up already, but maybe someone will tell me where to look for the problem. Or maybe someone has a ready target for L452RE and could share? By the way, I noticed that the hall controllers in STM libraries are different from the newest, which can be found in the CubeMX repositories. However, I do not know if this has any meaning for my problem, although I lost my evening yesterday because of the changed name of one of the variables. Are these drivers updated at all in the MBED OS sources? And if so, how often?