计算机工程 ›› 2010, Vol. 36 ›› Issue (1): 253-255.doi: 10.3969/j.issn.1000-3428.2010.01.088

• 开发研究与设计技术 • 上一篇    下一篇

基于嵌入式Linux系统的电源管理软件

邢向磊,周 余,都思丹   

  1. (南京大学电子科学与工程系,南京 210093)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-01-05 发布日期:2010-01-05

Power Management Software Based on Embedded Linux System

XING Xiang-lei, ZHOU Yu, DU Si-dan   

  1. (Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-01-05 Published:2010-01-05

摘要: 针对嵌入式系统的低功耗要求,提出高效的电源管理方案。在高级电源管理技术的基础上,增加启动加载程序对电源管理的支持,修改Linux内核代码以对S3C2440处理器和系统外设进行电源管理,建立用户空间电源管理守护进程。在YLP2440开发板上进行实验,实验结果表明,当系统处于空闲状态时,在2种典型的系统工作频率下,该电源管理软件系统可将系统功耗降低至未进行电源管理时的11.67%和12.96%。

关键词: 高级电源管理, 内存休眠, 低功耗设计, S3C2440处理器

Abstract: High efficient power management scheme is implemented to reduce the embedded system’s power consumption. An integrity power management software system is designed and implemented based on Advanced Power Management(APM) technology with adding the bootloader’s support for the power management, modifying the Linux kernel’s code to support the power management for the S3C2440 processor and system’s peripheral equipment, creating a user space daemon for power management. Experiment is done on the YLP2440 development board and the experimental results show that this power management system can reduce the power consumption to 11.67% and 12.96% respectively in two typical system frequency as that of the former in the idle state.

Key words: Advanced Power Management(APM), suspend to RAM, low-level power consumption design, S3C2440 processor

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