olivilik / stm32f103 Goto Github PK

I have followed your tutorial an got it to work with simple GPIO and loop-delays.

Then I tried using ISRs and it simply did not work.
Everything compiles without a glitch and loads into the target board (BluePill) and runs fine - except no ISRs get invoked. I do get interrupt(s) but they get stuck in blocking handlers.

Looking deeper I found that the whole vector table is filled with only blocking handlers. Here is a disassembly screenshot showing vector table:

It is as though linker simply ignores my nicely defined interrupt handler function(s), e.g.

void sys_tick_handler(void)
{
...
}

void tim1_up_isr(void)
{
...
}

I have checked the function names n-fold and have tried several online examples including those from the libopencm3-examples project to no avail.
This looks as a linker issue but I cannot figure it out (probably because I'm new to gcc).

I have also this one:

http://www.zoobab.com/arm-cortex-m3-stm32f103c8t6-stm32-core-board-development-boa

It is missing from your listing, maybe I can add some infos about it if you want.