Tips and Tricks

[+SpiceWare]

I thought I'd start a collection of useful tidbits. If you know of something please post it and I'll add it to this list.

 

• Hardware Division via Multiplication - the ARM doesn't support division via hardware, but we can use this trick to quickly divide by a fixed value.
• Speed boost - run code in RAM - if you have some RAM to spare, running time critical ARM code in RAM can be faster than running it in ROM.
• using long long (64 bit integers)? - using 64-bit values for bitwise operations
• Speed up your memset and memcpy with loop unrolling - rewrite memset and memcpy loops for better performance
• Reallocate ARM RAM - out of RAM for C but have unused RAM in Display Data? This shows how to adjust the amount allocated to each.