topic Re: How can I understand the FLASH occupation? in S12 / MagniV Microcontrollers

How can I understand the FLASH occupation?

fabrizioimpinna — Mon, 16 Nov 2015 13:09:52 GMT

Good afternoon,

I am trying to understand how much FLASH memory is occupied by the code.

I have found some informations in the .map file but they are not in agreement with the .sx size.

.sx size: 9,616 bytes

.map informations:

Summary of section sizes per section type:

READ_ONLY (R): F05 (dec: 3845)

READ_WRITE (R/W): 142 (dec: 322)

NO_INIT (N/I): 161 (dec: 353)

Total size of all blocks to be downloaded: 3845

Which is the right FLASH occupation? Which is the size of the downloaded code?

Thanks

Fabrizio

Re: How can I understand the FLASH occupation?

kef2 — Tue, 17 Nov 2015 08:03:30 GMT

Hi Fabrizio,

3845 is your used flash size. Size of S19 (SX) file is more than 2x bigger:

https://en.wikipedia.org/wiki/SREC_(file_format)

Regards,

Edward

Re: How can I understand the FLASH occupation?

RadekS — Thu, 19 Nov 2015 15:44:36 GMT

Hi Ed, you are right.

Hi Fabrizio,

Just explanation of “Size of S19 (SX) file is more than 2x bigger”

In SREC file, every byte is interpreted as hexadecimal number – by two chars. For example 0b11111111=255=0xFF (in file it is just FF)

Additionally, SREC lines always contain type of record, number of bytes, address and CRC checksum.

SREC files may contain also quite unimportant header and debugger records…

Therefore size of SREC file does not fit with occupied flash.

I hope it helps you.

Have a great day,
RadekS

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Re: How can I understand the FLASH occupation?

fabrizioimpinna — Thu, 19 Nov 2015 16:13:15 GMT

Thank you for the information.

Have a nice evening

Fabrizio