Out of RAM error; more possible solutions

[EmbdFreak]

hi all,

Ive had those good ol' "out of RAM" and "out of ROM" errors that i resolved by adding the #device thingi and splitting into functions( # separate didnt work) but im still lacking ROM. Anybody having ideas to free some more ROM; Plz share !!

[Mark]

1. Use a chip that has more ROM space
2. Try to combine like routines into a single function
3. If using write_eeprom() in multiple places, place this function in a wrapper function. CCS puts this function inline so the code is repeated on each call.
4. Remove an printf's that aren't really needed.

[ckielstra]

And in addition:
5) Don't use float variables (replace them by integer arithmetic).
6) Check the list file (*.lst) for large functions and think of ways to make them smaller.
7) Check the symbol file (*.sym) for variable sizes.
8) Check the call tree file (*.tre) for RAM used in every function (call).


For example I discovered the CCS supplied atoi() function to be huge, taking over 800 bytes of ROM because it is capable of converting every counting system in the universe to binary. I only need to convert HEX to bin and wrote my own function in about 50 bytes.