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newlib: use RTC_STORE registers to keep boot time instead of RTC_SLOW_MEM

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This allows RTC_SLOW_MEM to be powered down in deep sleep if no other variables are placed into RTC_SLOW_MEM.
This commit is contained in:
Ivan Grokhotkov
2017-01-11 17:28:09 +08:00
parent 9aa0e29079
commit b24ac487cb
3 changed files with 41 additions and 19 deletions
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14
components/esp32/include/rom/rtc.h
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@@ -53,16 +53,18 @@ extern "C" {
* Rtc store registers usage
* RTC_CNTL_STORE0_REG
* RTC_CNTL_STORE1_REG
* RTC_CNTL_STORE2_REG
* RTC_CNTL_STORE3_REG
* RTC_CNTL_STORE4_REG Reserved
* RTC_CNTL_STORE5_REG External Xtal Frequency
* RTC_CNTL_STORE2_REG Boot time, low word
* RTC_CNTL_STORE3_REG Boot time, high word
* RTC_CNTL_STORE4_REG External XTAL frequency
* RTC_CNTL_STORE5_REG APB bus frequency
* RTC_CNTL_STORE6_REG FAST_RTC_MEMORY_ENTRY
* RTC_CNTL_STORE7_REG FAST_RTC_MEMORY_CRC
*************************************************************************************
*/
#define RTC_ENTRY_ADDR_REG RTC_CNTL_STORE6_REG
#define RTC_MEMORY_CRC_REG RTC_CNTL_STORE7_REG
#define RTC_BOOT_TIME_LOW_REG RTC_CNTL_STORE2_REG
#define RTC_BOOT_TIME_HIGH_REG RTC_CNTL_STORE3_REG
#define RTC_ENTRY_ADDR_REG RTC_CNTL_STORE6_REG
#define RTC_MEMORY_CRC_REG RTC_CNTL_STORE7_REG
typedef enum {