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SourceVuESP-IDF Framework and ExamplesESP-IDFi2c_get_period()

i2c_get_period() function

Get I2C master clock period

Syntax

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Summary

Declaration

Definition

from i2c.h:476

esp_err_t i2c_get_period(i2c_port_t i2c_num, int *high_period, int *low_period);

Implemented in i2c.c:852

Arguments

Argument

Description

i2c_num

I2C port number

high_period

pointer to get clock cycle number during SCL is high level, will get a 14 bit value

low_period

pointer to get clock cycle number during SCL is low level, will get a 14 bit value

Return value

- ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error

References

Code

Location

esp_err_t i2c_get_period(i2c_port_t i2c_num, int *high_period, int *low_period)

i2c.c:852

esp_err_t i2c_get_period(i2c_port_t i2c_num, int *high_period, int *low_period);

i2c.h:476

Call Tree

i2c_get_period() calls 5 functions:

i2c_get_period()

i2c_ll_get_scl_timing()

Data Use

i2c_get_period() reads 11 variables:

esp_log_level_t::ESP_LOG_ERROR

esp_log_level_t::ESP_LOG_WARN

esp_log_level_t::ESP_LOG_INFO

esp_log_level_t::ESP_LOG_DEBUG

esp_log_level_t::ESP_LOG_VERBOSE

i2c_port_t::I2C_NUM_MAX

i2c_hal_context_t::dev

I2C_TAG

i2c_context_t::hal

i2c_context_t::spinlock

i2c_context

i2c_get_period()

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