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docs: updated timer related documents

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Wang Fang
2022-04-28 10:41:15 +08:00
parent 8cb780ffcd
commit e6230c4143
3 changed files with 8 additions and 5 deletions
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7
docs/en/api-reference/system/esp_timer.rst
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@@ -3,6 +3,9 @@ High Resolution Timer
{IDF_TARGET_HR_TIMER:default = "SYSTIMER", esp32 = "LAC timer"}
{IDF_TARGET_HR_TIMER_Resolution:default = "Not updated", esp32 = "64", esp32s2 = "64", esp32c3 = "52", esp32s3 = "52", esp32c2 = "52"}
Overview
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@@ -15,9 +18,9 @@ Hardware timers are free from both of the limitations, but often they are less c
An interrupt level of the handler depends on the :ref:`CONFIG_ESP_TIMER_INTERRUPT_LEVEL` option. It allows to set this: 1, 2 or 3 level (by default 1). Raising the level, the interrupt handler can reduce the timer processing delay.
``esp_timer`` set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range.
``esp_timer`` set of APIs provides one-shot and periodic timers, microsecond time resolution, and {IDF_TARGET_HR_TIMER_Resolution}-bit range.
Internally, ``esp_timer`` uses a 64-bit hardware timer, where the implementation depends on the target. {IDF_TARGET_HR_TIMER} is used for {IDF_TARGET_NAME}.
Internally, ``esp_timer`` uses a {IDF_TARGET_HR_TIMER_Resolution}-bit hardware timer, where the implementation depends on the target. {IDF_TARGET_HR_TIMER} is used for {IDF_TARGET_NAME}.
Timer callbacks can be dispatched by two methods: