STM32F750 uClinux的低功耗模式测试

2020-01-04 19:01发布

Linux是有低功耗模式的(Low Power Mode),emcraft的STM32F7也实现了这个功能,它支持suspend to RAM模式。也就是电脑上常说的挂起到内存。
在STM32F750开发板上可以通过命令行使系统挂起,使用SW3 button唤醒系统(wake up)。
1. 系统正常启动,测量5V输入端电流,大约210mA
wake up pin.png (702.38 KB, 下载次数: 0) 下载附件 2019-4-2 20:49 上传

  1. dwc2 50000000.usb: suspending usb gadget g_serial
  2. dwc2 50000000.usb: s3c_hsotg_ep_disable: called for ep0
  3. dwc2 50000000.usb: s3c_hsotg_ep_disable: called for ep0
  4. PM: suspend of devices complete after 5.553 msecs
  5. PM: late suspend of devices complete after 4.632 msecs
  6. PM: noirq suspend of devices complete after 2.482 msecs
  7. PM: noirq resume of devices complete after 1.748 msecs
  8. PM: early resume of devices complete after 2.316 msecs
  9. dwc2 50000000.usb: resuming usb gadget g_serial
  10. PM: resume of devices complete after 111.242 msecs
  11. Restarting tasks ... done.
  12. / #
复制代码此时系统电流重新回到210mA左右。
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