Kenji, I tried your suggestion already and my files look essentially like yours. I did update my files to yours just in case, but the example "Nucleo_rtos" does not run. It compiles, but when I run it, it freezes.

The problem is Thread - when I remove the threading, I can alternately flash the LED and print out statements. Just as a sanity check.

Do you have a simple Threading example that you have successfully run on the L152RE?

I believe the "main" thread runs fine, but no other threads are created. The program blocks when an attempt is made to create a different thread.

Thanks, John

Hi John,

I have locally tested the code from Arai-san and worked fine.

mbed RTOS example
During the last 6 seconds, the Button was pressed 5 times
During the last 6 seconds, the Button was pressed 1 times
During the last 6 seconds, the Button was pressed 7 times
During the last 6 seconds, the Button was pressed 41 times

Then, I made a pull request for this change.

https://github.com/mbedmicro/mbed/pull/1106

Watarai-san,
Thank you for your big support!

John,
I will make a simple sample program this weekend.
Please wait.

Hi John,
As I mentioned above, I made a sample program.
/users/kenjiArai/code/Nucleo_rtos_sample/rev/587b8f1bab9d
Before using the program, please read following my note and modify the program if you want.
/users/kenjiArai/notebook/necleo-l152re-rtos-sample-also-for-f401re--f411re-/
Sample program shows several example like;
osThreadDef
osThreadCreate
Thread::wait
Thread::yield
mail_box
Mutex
osDelay
void mbed_die(void)

Watarai-san,
Thanks again for pull request action and rev. 77 was released with based on the request.
Unfortunately, I don't inform you the System Clock issue before official release.
I have recognize it yesterday using logic analizer.
I hope mbed team will update remained parts ASAP.

Hi Kenji, Thank you for taking the time on this issue and writing such a thorough answer. I've tried again and it seems to work with online compilation, which is really great, but when exported to gcc (arm embedded), the same program compiles but freezes when run on the L152 board. I was originally working with it off line and I have been having problems with the exports lately. Could this be another issue? I have found (as others have) that the exports are often corrupted.

Hi Toyomasa,

I have tried updating all the mbed libraries, so I have the very latest. Then I replace the modified files from Kenji. But still the Nucleo_rtos code does not work properly. The first printf statement runs and outputs "mbed RTOS example", but nothing else happens.

Thanks anyway for your suggestions.

Can anyone from ST shed some light no this?

Thanks, John