Naguissa
STM32F103 freezing after a short while - worked fine before.
I set a timer for 50ms The failed function does not need to do anything - it usually just set a variable.
After a short while, the uC will freeze.
This worked fine half a year ago, when I last compiled this program. now it fails after a while.
(I omitted the use of this library to solve it.)
May marking the variable used inside interrupt as "volatile" solve the issue?
If you share a failing code would be useful; still I'll try to recreate.
I also tried replacing the variable with just delayMicroseconds(1)
The program is big with some custom libraries and dependencies, but the gist is: stm32_core is used. MAVLink library is used (not uC specific) two HW serial ports are used, one in one-wire bidirectional mode. CDC serial is used. a few other libraries that I could disable also proved to be invariant to this issue.
All I needed/used was:
TimerLib.setInterval_us(timer20hzEvent, 50000);
void timer20hzEvent() { timer20hz = true; }
This had worked for years. The main loop checked variable timer20hz. As mentioned, I also tried to replace setting the variable with just a small delay. The main loop runs for a short while (I did not time it - but I doubt it was as much as one sec) - then everything stopped.
It is years since I changed the essential parts of this code.
This could very well be some super-odd case of some incompatibility between updated libraries/compiler...
If you check the code, it has been 3 years since last change: https://github.com/Naguissa/uTimerLib/tree/master/src/hardware
Using delay inside interrupts is a no-go.
timer20hz variable should be declared as volatile.
As stmt2_core I understand official ST core, right? It's not Roger Clark one.
As implementation has not changed I suspect something changed on ST core; I'll try to recreate when I have some spare time.
Yes, official ST core I also tried older Arduino IDE 2.3.2, and older ST-code, and failed to make it work. ST Core had more releases recently, but if up/downgrade system works as intended - that's not it. Thank you.
I've overhauled STM32 implementation using volatile static variables and static methods. I've tested on both cores (ST and Roger one) and seems to work like a charm.
Could you test it? It should be available in one or two hours at Arduino IDE or you can download it from releases page, it's version 1.7.4
Cheers!