topic Re: MCF51 - CodeSourcery - Filling Used Memory in ColdFire/68K Microcontrollers and Processors

MCF51 - CodeSourcery - Filling Used Memory

SoJulien — Thu, 11 Feb 2010 16:43:02 GMT

Dear all,

I am using MCF51AC256, and I need to fill unsused memory (Flash, and maybie also RAM) as described in AN3305.

I need a simple method that does not interfer when compiling a new software release.

All yours ideas are welcome, thanks.

Julien

Re: MCF51 - CodeSourcery - Filling Used Memory

scifi — Thu, 11 Feb 2010 19:59:11 GMT

Hi Julien,

Have a look at Srecord: http://srecord.sourceforge.net

You can use this program (more specifically, srec_cat) to manipulate .s19 files in all sorts of ways, including filling unused memory with a specific pattern.

Regards,

- mike

Re: MCF51 - CodeSourcery - Filling Used Memory

SoJulien — Thu, 11 Feb 2010 20:50:38 GMT

Thanks you Mike,

It seems pretty good, I will try it for both item I have post.

Re: MCF51 - CodeSourcery - Filling Used Memory

egoodii — Wed, 07 Apr 2010 01:18:15 GMT

If I can assume you are using CodeWarrior, then the linker FILL parameter:

ROM = READ_ONLY 0xF000 TO 0xFFAB FILL 0x83;

does a fine job of filling out the s19 file. As an adjunct, adding the paramater section:

CHECKSUM

CHECKSUM_ENTRY METHOD_CRC_CCITT

OF READ_ONLY 0xF000 TO 0xFFAB

INTO READ_ONLY 0xFFAC SIZE 2

UNDEFINED 0x83

END

will insert a CCITT checksum.