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Hello. I am trying to find new and exciting ways to optimize (read: shrink down) my current code and want to include an eeprom autorefresh option to cut down on variables. Basically, when I have the AutoRefreshCompile option set, I want it to create the variable "randomvariable". My code is pretty simple:
#define AutoRefreshCompile 1 #if(AutoRefreshCompile==1) { // line x extern signed short randomvariable; } // line y #endif
I am getting errors that read as follows:
VARS.H(x) error C141: syntax error near '{' VARS.H(y) error C141: syntax error near '}'
I'm guessing it is not possible to do this (if I remember correctly, variables have to be declared at the beginning and can't be in the middle of functions/code segments but maybe it's some really simple fix.
I realize this might not work but I figure it's worth a shot. Any suggestions? Thanks!
And what, exactly, do you mean by that?
Remember that optimisation happens at compile time - you can't retrospectively optimise at run time!
"I'm guessing..."
Don't guess!!
If you want to out-smart the compiler, then you're going to need a really thorough understanding of not just the 'C' language, but also compiler technology.
Here are some 'C' references for you to study: blog.antronics.co.uk/.../12
Well, I guess you could use some sort of compression; but it seems rather unlikely that the overhead of the compression & decompression software would leave any net benefit - especially on an 8051.
Plus there'd be the speed penalty.
going by the number and frequency of posts it look like work is light for a certain regular poster at the moment.