4 Commits

Author	SHA1	Message	Date
Ivan Grokhotkov	a99483a727	docs: add information about execution time of ULP instructions	2017-12-11 14:05:41 +08:00
Ivan Grokhotkov	9317cb3434	soc/rtc: add tests for CPU frequency switching ... These tests switch between PLL and XTAL frequencies for 10 seconds.	2017-10-26 19:53:53 +08:00
Ivan Grokhotkov	3323f31cfb	soc: implement XTAL frequency detection ... ROM code already implements XTAL frequency detection, but it uses the 8M clock before the clock tuning parameters are initialized. With the zero clock tuning parameter, 8M clock has significant frequency deviation at high temperatures, which can lead to erroneous detection of 40 MHz crystal as a 26 MHz one. This change adds XTAL frequency detection code to rtc_clk_init routine, and detection is performed after the 8M clock tuning parameter as been initialized.	2017-04-24 15:29:30 +08:00
Ivan Grokhotkov	7ee8ee8b7e	soc: add source code of rtc_clk, rtc_pm	2017-04-11 15:45:54 +08:00