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Hi everyone,
I am debugging an application on a STM32F4 in flash with a ULINK. I read one of the features for the ULINK should be 8 breakpoints, but after the 6th breakpoint I get an error message. Isn't it possible to use all 8 breakpoints? Maybe can I use 8 breakpoints with another device?
Can you help me with this?
Warden
What error message, exactly, do you get?
The error I get is: 'Cannot set breakpoint. All hardware breakpoints in use.'
So I cannot use 8, but only 6 breakpoints?
If I understand the Cortex-M4 Technical Reference Manual correctly, you should expect a maximum of 6 breakpoints.
About the Flash Patch and Breakpoint Unit (FPB) ... A full FPB unit contains: ... - Six instruction comparators for matching against instruction fetches from Code space, and remapping to a corresponding area in System space. Alternatively, you can configure the comparators individually to return a Breakpoint Instruction (BKPT) to the processor core on a match, to provide hardware breakpoint capability.
Other debugging facilities in the Cortex-M4 may provide a hardware breakpoint capability as well, but I didn't look into that.