56F8013, debugger access to peripheral registers

rmerwin — Wed, 04 Jul 2007 03:35:56 GMT

I'm using CodeWarrior 56800E 8.1 (CodeWarrior 56800/E Hybrid Controllers version 7.1).   I'm trying to use the debugger's "Register" window to access peripheral registers in a 58F8013.

My code writes 16-bit values to the following registers:

    GPIOA_PEREN = 0xFFFF;
    GPIOA_DDIR = 0xFFFF;
    GPIOA_DATA = 0xFFFF;

But in the Debugger's Register window, I see:

    GPIOA_PER    0x00FF
    GPIOA_DDR   0x00FF
    GPIOA_DR      0x00FF

When I click on the values in the Register window and set them manually to any 16-bit value, the value always has the top 8 bits masked off.

Does the debugger have a bug, or is there a configuration option somewhere that I've missed?

Ralph

Re: 56F8013, debugger access to peripheral registers

rmerwin — Mon, 09 Jul 2007 23:35:53 GMT

Replying to my own message, after reviewing the data sheet I had one of those 'duh' moments when I realized that the GPIO registers are only 8-bits... So the debugger is working as expected.

Ralph

topic Re: 56F8013, debugger access to peripheral registers in Classic/Legacy CodeWarrior

56F8013, debugger access to peripheral registers

Re: 56F8013, debugger access to peripheral registers