Cannot set breakpoint in FLASH

Altera_Forum · ‎09-02-2005

I'm trying to set a breakpoint in FLASH memory. When I do, execution pauses at PC, and the following error appears on the log:

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Cannot insert breakpoint 8.

Error accessing memory address 0x1033e4: (undocumented errno -1).[/b]

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Are memory writes needed for setting breakpoints? Breakpoints for internal ROM work OK, so it doesn't make apparent sense.

Altera_Forum · ‎09-02-2005

Looks like I have a workaround - insert a break instruction into the code:

asm ("break");

This also gets around the "set breakpoint at arbitrary address" problem as well http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

Altera_Forum · ‎09-02-2005

The internal ROM isn't really readonly, so it allows you to set a breakpoint. The best way to do what you want is to turn on the hardware breakpoints. You will get a limited number of hardware breakpoints, but it will allow you to change them without reflashing the code.

Regards,