Hex file code size

Yun Chia Hsieh · ‎2016-12-12

Posted on December 13, 2016 at 04:35

Hi,

I'm using IAR to create a hex file which size is 233KB.

However, when I look into the .map file, it told below:

183 710 bytes of readonly code memory

4 265 bytes of readonly data memory

62 327 bytes of readwrite data memory.

The ROM size is 183710+4265=187975.

This is not the same with hex file size.

Which one is correct?

Thanks.

Andrei Chichak · ‎2016-12-12

Posted on December 13, 2016 at 04:59

My guess would be all of them are correct.

Your .hex file is a representation of your program's machine code binaries. Each byte is represented by two displayable ASCII values with a value of 0-F. Then the file has the addresses of where the values should go, byte counts, record types, checksums, and a whole whack of colons.

Take a look at the wikipedia entry for Intel Hex Format and all will be revealed.

https://en.wikipedia.org/wiki/Intel_HEX

Andrei from The Great White North