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SourceVuESP-IDF Framework and ExamplesESP-IDFesp_clk_tree_lp_slow_get_freq_hz()

esp_clk_tree_lp_slow_get_freq_hz() function

Get frequency of LP_SLOW_CLK (i.e. RTC_SLOW_CLK)

Syntax

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Summary

Declaration

Definition

from esp_clk_tree_common.h:67

uint32_t esp_clk_tree_lp_slow_get_freq_hz(esp_clk_tree_src_freq_precision_t precision);

Implemented in esp_clk_tree_common.c:137

Arguments

Argument

Description

precision

Degree of precision of the returned frequency value, one of esp_clk_tree_src_freq_precision_t values

Return value

LP_SLOW clock frequency, in Hz. Returns 0 if degree of precision is invalid or calibration failed.

References

Code

Location

Referrer

uint32_t esp_clk_tree_lp_slow_get_freq_hz(esp_clk_tree_src_freq_precision_t precision)

esp_clk_tree_common.c:137

uint32_t esp_clk_tree_lp_slow_get_freq_hz(esp_clk_tree_src_freq_precision_t precision);

esp_clk_tree_common.h:67

clk_src_freq = esp_clk_tree_lp_slow_get_freq_hz(precision);

esp_clk_tree.c:43

esp_clk_tree_src_get_freq_hz()

Call Tree

esp_clk_tree_lp_slow_get_freq_hz() is called by 1 function and calls 4 functions:

esp_clk_tree_src_get_freq_hz()

esp_clk_tree_lp_slow_get_freq_hz()

rtc_clk_freq_cal()

clk_ll_rtc_slow_load_cal()

clk_hal_lp_slow_get_freq_hz()

clk_tree_rtc_slow_calibration()

Data Use

esp_clk_tree_lp_slow_get_freq_hz() reads 3 variables:

esp_clk_tree_src_freq_precision_t::ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED

esp_clk_tree_src_freq_precision_t::ESP_CLK_TREE_SRC_FREQ_PRECISION_APPROX

esp_clk_tree_src_freq_precision_t::ESP_CLK_TREE_SRC_FREQ_PRECISION_EXACT

esp_clk_tree_lp_slow_get_freq_hz()

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