Commit graph

14 commits

Author SHA1 Message Date
Ivan Grokhotkov
6353bc40d7 Add support for 32k XTAL as RTC_SLOW_CLK source
- RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz
  function can be used instead to get an approximate RTC_SLOW_CLK
  frequency

- Clock calibration is performed at startup. The value is saved and used
  for timekeeping and when entering deep sleep.

- When using the 32k XTAL, startup code will wait for the oscillator to
  start up. This can be possibly optimized by starting a separate task
  to wait for oscillator startup, and performing clock switch in that
  task.

- Fix a bug that 32k XTAL would be disabled in rtc_clk_init.

- Fix a rounding error in rtc_clk_cal, which caused systematic frequency
  error.

- Fix an overflow bug which caused rtc_clk_cal to timeout early if the
  slow_clk_cycles argument would exceed certain value

- Improve 32k XTAL oscillator startup time by introducing bootstrapping
  code, which uses internal pullup/pulldown resistors on 32K_N/32K_P
  pins to set better initial conditions for the oscillator.
2017-04-26 12:43:22 +08:00
Ivan Grokhotkov
7ee8ee8b7e soc: add source code of rtc_clk, rtc_pm 2017-04-11 15:45:54 +08:00
Ivan Grokhotkov
6ad0a157e3 driver/rtc: add APIs to enable/disable hold function 2017-03-24 10:11:13 +08:00
Ivan Grokhotkov
e96d653c9e ulp: make sure I_WAKE instruction works with ULP timer disabled
Setting ULP_CP_WAKEUP_FORCE_EN forces ULP wakeup to work even if the
ULP timer has already been disabled.
2017-02-22 17:10:52 +08:00
Ivan Grokhotkov
a64181f14f deep sleep: add functions to check wakeup cause
This change adds esp_deep_sleep_get_wakeup_cause, which returns the
source which has caused wakeup from deep sleep.

Similar to esp_deep_sleep_get_ext1_wakeup_status, a function is added
to check touch pad wakeup status: esp_deep_sleep_get_touchpad_wakeup_status.
This function returns the touch pad which has caused wakeup.
2017-02-22 14:40:36 +08:00
Ivan Grokhotkov
07ff47f103 deep sleep: clarify compatibility issues between wakeup sources
ULP and touch FSMs in ESP32 revisions 0 and 1 do not operate correctly
if RTC_PERIPH power domain is force powered on (ESP_PD_OPTION_ON).

Both ULP and touch still work, but clock frequency of the ULP may be
incorrect and touch values may be off by considerable amount. As such,
when these wakeup modes are used, RTC_PERIPH power domain has to be set
to ESP_PD_OPTION_AUTO (or, in the current implementation,
ESP_PD_OPTION_OFF — though this will change in the future when _OFF will
actually *force* the power domain to be powered off).

Because EXT0 wakeup source requires RTC_PERIPH to be powered ON, mark
ULP and touch wakeup sources as incompatible with EXT0. Workaround for
this is to use EXT1 wakeup source instead, which offers similar or
better functions without having to keep RTC_PERIPH powered on.
2017-02-22 14:40:36 +08:00
Wangjialin
fb261c0bd5 1. deal with conflicting wakeup triggers
2. modify deep_sleep.rst, add description of touch wakeup.
2017-02-22 14:40:36 +08:00
Wangjialin
cc13b0ea05 deep sleep: allow wakeup from touch sensor interrupt 2017-02-22 14:40:36 +08:00
Ivan Grokhotkov
d3fde5188e deep sleep: bring some registers into known state
In case WiFi/BT stack has been enabled but wasn’t disabled, some RTC
bits may be left enabled, causing increased current consumption.
This change returns some of the bits back to their default values.
2017-02-21 17:07:15 +08:00
Ivan Grokhotkov
9aa0e29079 deep sleep: keep RTC_SLOW_MEM powered on if data is placed into RTC slow memory 2017-01-12 14:15:30 +08:00
Ivan Grokhotkov
e4811216ff deep sleep: fix regression due to moving ets_update_cpu_frequency into IRAM
Deep sleep stub may call ets_update_cpu_frequency, which has been moved from ROM to IRAM.
Restore the ROM version in the linker script, call it ets_update_cpu_frequency_rom, use it in the deep sleep stub.
2017-01-12 14:15:25 +08:00
Ivan Grokhotkov
370f4b8556 deep sleep: set pin configuration right before entering deep sleep
This change allows setting pin configuration for EXT1 wakeup depending on the state of RTC_PERIPH power domain:
- if peripherals are enabled (due to another wakeup mode, or due to esp_deep_sleep_pd_config call), we can keep internal pullups/pulldowns enabled
- if peripherals are disabled, pullups and pulldowns need to be disabled as well

Also add comments about the purpose of registers being configured.
2016-12-16 14:30:27 +08:00
Ivan Grokhotkov
609d852834 deep sleep: power down RTC peripherals in EXT1 sleep 2016-12-16 14:30:27 +08:00
Ivan Grokhotkov
35115885c5 deep sleep: add API to control power down 2016-12-16 14:30:27 +08:00
Renamed from components/esp32/deepsleep.c (Browse further)