Managing Power in Embedded Applications Using Dual Operating Systems
Publication: EE Times Embedded
June 28, 2011 -- Many of today's operating systems, like Linux, come with power-management support. The features have been available on the mainstream kernel since Linux made headway to lower power portable devices like smart phones, tablets and ebook readers. So even though your design is a plugged-in appliance, you can embrace the "go green" initiative from the ground up by taking advantage of the power-management features that are already in place and incorporate them.
In this article I will first review power-savings techniques available with today's powered (i.e., plugged-in) system-on-chip (SOC)-based embedded systems and quickly move on to the discussion of how two operating systems (OSes), each with its own power methodologies, can cooperate at the system level to provide power management services.
By Loc Truong. (Truong is a technologist and a senior member of Texas Instruments, Inc.'s C6000 digital signal processor (DSP) technical staff.)
Reprinted from SOCcentral.com, your first stop for ASIC, FPGA, EDA, and IP news and design information.