mirror of
https://github.com/espressif/esp-idf
synced 2025-04-14 10:40:10 -04:00
07ff47f103
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.