Re: Accessing 20-bit memory range - issues with indirect addressing mode

2014-05-04 22:14 GMT+02:00 Tomek Lorek <[email protected]>:
> Just checked the flashdump diff right before and after executing the
> program - "movx #0, @%0"::"r"(flash))" variant messed up the flash
> bank A from where I was running the code and it erased 0xc400 instead
> of 0x1c400.
> Do you have any idea why?

Ok, got it! I have misplaced the input and output operands:
Correct: __asm__ __volatile__ ("movx.b #0, @%0":"=r"(flash):);
Incorrect: __asm__ __volatile__ ("movx.b #0, @%0"::"=r"(flash));

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