8-bit - Cosmic C memory usage report

 Projects / Misc 8-bit uC projects  Original post date: 02/09/2017

I have been trying to figure out the overall memory usage of my C program, but for whatever reason Cosmic C doesn't seem to provide a summary. Did a bit of googling and found a program call MapInfo from a Chinese website.

The Chinese BBS is here (with download) : http://www.amobbs.com/forum.php?mod=viewthread&action=printable&tid=4069099
The English description is here (missing download): http://prog3.com/sbdm/blog/chuangwu2009/article/details/25879643

There is a bug fixed version somewhere down the comments. This one also comes with C source code.
MapInfo for Cosmic ourdev_593473S9G527.ziphttp://cache.amobbs.com/bbs_upload782111/files_34/ourdev_593473S9G527.zip (File Size: 19K) (the original file name: mapinfo.zip)

I used virustotal which uses 55 anti-virus scanners for testing the file. Someone might alter the files, so do the test yourself.

MapInfo uses the .map file from the compiler. To enable the .map file, right click on the project and go to the Linker tab: Output and select the "Generate Map file" option.

I copy the executable into the compiler directory.
"C:\Program Files (x86)\COSMIC\FSE_Compilers\CXSTM8"

The next step is to add MapInfo command in the Post-Build tab by copy the following line into the command field.

MapInfo $(OutputPath) $(TargetSName).Map

Here is the output:

So what is it reporting for my program?

It seems to add up the ones circled in Red for the flash size and green for the eeprom. (Additional fields are used - see source code).

The updated version seem to pick up the stack usage:

It looks like the stack size is the largest of the first column 17 added to the largest of the second column (6). I am guessing first column is the call stack and second column is the local variable on the stack.

Stack size: 17+6 = 23.

If you rather not trust some Chinese BBS boards, you could write one yourself using this info.  It is a matter of parsing the text in the map file.  It is about 1st year computer science difficulty level.