How can I get the PC register value in STM32? Help me please.

[S.Ma]

In debug mode, place a breakpoint or stop the code, and view the disassembly window which will show you which address the PC value is. Or view the SFR core registers.... why do you need this?

[NGUYEN-VAN NHI]

I want to read PC value to use it for program and not for observation purpose. Is there any way sir?

[Tesla DeLorean]

Explain better what it is you're attempting to do.

I​n assembler you can move the value to other registers or do math directly with the PC. You could perhaps create a subroutine which moves LR to R0 and see where it was called from.

P​erhaps learn MCU registers, instructions and assembler?

[NGUYEN-VAN NHI]

Yes, I have some programs running on flash, I want to save some values from register r0 to r15 and the value of register pc, so that I can go back and continue doing my old work.

[Tesla DeLorean · Accepted solution]

R14 == LR

R15 == PC

calledfromwhere ; subroutine returns address from whence it came
  movs r0, lr
  bx lr
 
Usage
   bl calledfromwhere ; assembler
 
  printf("%p\n", calledfromwhere() ); // C

[NGUYEN-VAN NHI]

I will try it, thank you very much.

[Pavel A.]

GCC has intrinsic function __builtin_return_address() exactly for this