alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-09-19 14:26:01 -04:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

improve flash power down logic

Browse Source
This commit is contained in:
jingli 2022-04-26 11:27:40 +08:00
parent 4851857573
commit 824e0ddca8
2 changed files with 34 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
components/esp_hw_support/Kconfig
View File

@ -32,6 +32,30 @@ menu "Hardware Settings"
possible to force a power domain to stay ON during light sleep by using esp_sleep_pd_config()
function.
config ESP_SLEEP_FORCE_POWER_DOWN_FLASH
bool "Relax the conditions for power down flash"
depends on ESP_SLEEP_POWER_DOWN_FLASH
default n
help
Currently in IDF, whether the flash can be powered down depends on whether the RTC timer wakeup source
is enabled or not. Only when RTC timer is the only wakeup source and sleep_duration is big enough, we
can power down flash. The reason for this logic is:
If the flash is powered up again(such as wakeup happens) during its power-down period, the flash may
not work properly. It means that if we are going to power down the flash, we must power down the flash
completely. The power-down process takes time. So, if we can't make sure the sleep time is long enough,
then we can't power down the flash.
Considering that the probability of flash not working properly when powered up again during power-down
period is very small(< 1%). And maybe some kind of flash do not have this problem. So provide this configuration
item to relax the conditions for power down flash.
If not enabled, The power-down conditions of flash are strict and absolute safe. If enabled, chip will
also power down flash when RTC timer wakeup source is not enabled or sleep_duration is big enough.
Enabling this configuration item can bring better power consumption performance. But users need to pay
attention to the potential risks.
config ESP_SLEEP_RTC_BUS_ISO_WORKAROUND
bool
default y if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3

11
components/esp_hw_support/sleep_modes.c
View File

@ -636,6 +636,15 @@ static esp_err_t esp_light_sleep_inner(uint32_t pd_flags,
return err;
}
static inline bool can_power_down_vddsdio(const uint32_t vddsdio_pd_sleep_duration)
{
return ((s_config.wakeup_triggers == RTC_TIMER_TRIG_EN) && (s_config.sleep_duration > vddsdio_pd_sleep_duration))
#if CONFIG_ESP_SLEEP_FORCE_POWER_DOWN_FLASH
|| (!(s_config.wakeup_triggers & RTC_TIMER_TRIG_EN) || (s_config.sleep_duration > vddsdio_pd_sleep_duration))
#endif
;
}
esp_err_t esp_light_sleep_start(void)
{
s_config.ccount_ticks_record = cpu_ll_get_cycle_count();
@ -711,7 +720,7 @@ esp_err_t esp_light_sleep_start(void)
flash_enable_time_us + LIGHT_SLEEP_MIN_TIME_US + s_config.sleep_time_adjustment
+ rtc_time_slowclk_to_us(RTC_MODULE_SLEEP_PREPARE_CYCLES, s_config.rtc_clk_cal_period));
if (s_config.sleep_duration > vddsdio_pd_sleep_duration) {
if (can_power_down_vddsdio(vddsdio_pd_sleep_duration)) {
if (s_config.sleep_time_overhead_out < flash_enable_time_us) {
s_config.sleep_time_adjustment += flash_enable_time_us;
}