Hi all,
as stated here (http://arduino.cc/en/pmwiki.php?n=Tutorial/Memory) adruinos usually do not have much SRAM and it is easy to use it all up by using many constant strings
> Notice that there's not much SRAM> available in the Uno. It's easy to use> it all up by having lots of strings in> your program.<sarcasm warning> The nice feature of the arduino IDE in this cases is that it does not fail to compile or upload but only the arduino programm will run 'strangely' </sarcasm warning>> If you run out of SRAM, your program> may fail in unexpected ways; it will> appear to upload successfully, but not> run, or run strangely. To check if> this is happening, you can try> commenting out or shortening the> strings or other data structures in> your sketch (without changing the> code). If it then runs successfully,> you're probably running out of SRAM.
I have observed this behaviour with my arduino code that uses ros_lib. One of the causes is that ros_lib stores for each topic (publish/subscribe) 3 strings ( md5sum, message type name and topic name ). Particularly if I use topics with namespaces if have observed the problem on arduino uno after setting up only 3 or 4 topics.
How the question: Has anyone considered modifying the message generator for Ardunio such that it uses PROGMEM for storing md5sum, topic and stuff? (Or is it even possible?)
http://www.arduino.cc/en/Reference/PROGMEM
The data is static and I think this would significantly reduce the SRAM usage....
Thank you!
Edit 22.09.: anyone?
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