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deep sleep: keep RTC_SLOW_MEM powered on if data is placed into RTC slow memory

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Ivan Grokhotkov
2017-01-11 17:23:23 +08:00
parent e4811216ff
commit 9aa0e29079
4 changed files with 17 additions and 7 deletions
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18
components/esp32/deep_sleep.c
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@@ -302,12 +302,18 @@ static uint32_t get_power_down_flags()
{
// Where needed, convert AUTO options to ON. Later interpret AUTO as OFF.
// RTC_SLOW_MEM is needed only for the ULP.
// If RTC_SLOW_MEM is Auto, and ULP wakeup isn't enabled, power down RTC_SLOW_MEM.
if (s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] == ESP_PD_OPTION_AUTO) {
if (s_config.wakeup_triggers & RTC_SAR_TRIG_EN) {
s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] = ESP_PD_OPTION_ON;
}
// RTC_SLOW_MEM is needed for the ULP, so keep RTC_SLOW_MEM powered up if ULP
// is used and RTC_SLOW_MEM is Auto.
// If there is any data placed into .rtc.data or .rtc.bss segments, and
// RTC_SLOW_MEM is Auto, keep it powered up as well.
// These labels are defined in the linker script:
extern int _rtc_data_start, _rtc_data_end, _rtc_bss_start, _rtc_bss_end;
if (s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] == ESP_PD_OPTION_AUTO ||
&_rtc_data_end > &_rtc_data_start ||
&_rtc_bss_end > &_rtc_bss_start) {
s_config.pd_options[ESP_PD_DOMAIN_RTC_SLOW_MEM] = ESP_PD_OPTION_ON;
}
// RTC_FAST_MEM is needed for deep sleep stub.