Integer percentage & asm, no fp 2013-01-05

This is a further discussion in the vein of 3v0's scaling article posted earlier.

Percentage calculations become necessary reasonably frequently, as a correction factor for sensors or for scaling numbers to fit on a limited digit display or any number of applications.

Recently, I had reason to scale variable 8 bit numbers by a variable percentage in ASM. I also had a limitation of running the microcontroller at a low clock speed to be power efficient as a solar application.

The key in...

Click to expand...