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Based on low-power embedded Linux system design and implementation of the program

Author: YangXiaoFeng
Tutor: DuXu
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Embedded Linux Low power consumption
CLC: TP368.1
Type: Master's thesis
Year: 2011
Downloads: 46
Quote: 0
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Abstract


With the rapid development of embedded technology , embedded products already on the functional requirements can well meet the needs of customers , but power consumption has become a urgent problem . Low-power technology requires electrical characteristics of the hardware devices and software control two considerations. This paper describes the system software to control system power consumption , low-power solutions . First analysis of the current low-power technology development, according to the actual hardware platform , a set can effectively control the system energy consumption solutions. Actual system platform is based on ARM9 processor and Linux operating systems. To achieve the purpose of the system is able to intelligently determine the system load or accept outside trigger for system sleep , into lower power states , and in the increase in load or external trigger to wake into the normal operating state. And according to the actual needs of different depths sleep , sleep in a different state, the hardware equipment condition will be different , and ultimately makes the system power consumption reduced to varying degrees . Specific implementation is divided into two parts, the system control and hardware control . System control is achieved by analyzing the operational status of the system , determine the need for switching between different power states , including user processes running kernel threading processor takes time and other system operations . Hardware control involves various peripheral devices and processors. Simultaneously by adding modules for system startup code fast wake-up . According to this solution, test the power consumption when the system goes to sleep the sleep depth can reach different power requirements can be reduced to the lowest power system during normal operation within 15% . Although this design based on a specific hardware platform, but involves thinking can be a good use of other hardware platforms for embedded Linux systems.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Micro-computer > A variety of micro-computer > Microprocessor
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