RIOT-OS/thirdparty_cpu — pull request #3 by southernbear (2013-08-19 09:47:13+00:00)
Title: stm32f4discovery long-term deep sleep

Use deep sleep to save power consumption.

* Enter Stop Mode when long-term sleeping(more than 1s) and wake up by RTC.
* Provide automatic RTC calibration synchronized with TIM2.