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esp_timer: add support for frequency scaling

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Ivan Grokhotkov
2017-10-09 15:24:51 +08:00
parent 3f818f4862
commit eb0c34e5c9
3 changed files with 80 additions and 0 deletions
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13
components/esp32/Kconfig
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@@ -970,6 +970,19 @@ config PM_DFS_INIT_AUTO
If disabled, DFS will not be active until the application
configures it using esp_pm_configure function.
config PM_USE_RTC_TIMER_REF
bool "Use RTC timer to prevent time drift (EXPERIMENTAL)"
depends on PM_ENABLE && (ESP32_TIME_SYSCALL_USE_RTC || ESP32_TIME_SYSCALL_USE_RTC_FRC1)
default n
help
When APB clock frequency changes, high-resolution timer (esp_timer)
scale and base value need to be adjusted. Each adjustment may cause
small error, and over time such small errors may cause time drift.
If this option is enabled, RTC timer will be used as a reference to
compensate for the drift.
It is recommended that this option is only used if 32k XTAL is selected
as RTC clock source.
config PM_PROFILING
bool "Enable profiling counters for PM locks"
depends on PM_ENABLE