Power Efficient Software Coding

Question

In a typical handheld/portable embedded system device Battery life is a major concern in design of H/W, S/W and the features the device can support. From the Software progra

Answer 1

Don't poll, sleep

Avoid using power hungry areas of the chip when possible. For example multipliers are power hungry, if you can shift and add you can save some Joules (as long as you don't do so much shifting and adding that actually the multiplier is a win!)

If you are really serious,l get a power-aware debugger, which can correlate power usage with your source code. Like this