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
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2019-4-2 20:49 上传
- dwc2 50000000.usb: suspending usb gadget g_serial
- dwc2 50000000.usb: s3c_hsotg_ep_disable: called for ep0
- dwc2 50000000.usb: s3c_hsotg_ep_disable: called for ep0
- PM: suspend of devices complete after 5.553 msecs
- PM: late suspend of devices complete after 4.632 msecs
- PM: noirq suspend of devices complete after 2.482 msecs
- PM: noirq resume of devices complete after 1.748 msecs
- PM: early resume of devices complete after 2.316 msecs
- dwc2 50000000.usb: resuming usb gadget g_serial
- PM: resume of devices complete after 111.242 msecs
- Restarting tasks ... done.
- / #
复制代码此时系统电流重新回到210mA左右。
工作中用不到,再加上没啥资料。。确实是难以进步。。
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