Symbols

Files

Summary Syntax Arguments References Call Tree Data Use

SourceVuESP-IDF Framework and ExamplesESP-IDFledc_set_freq()

ledc_set_freq() function

LEDC set channel frequency (Hz)

Syntax

Show:

Summary

Declaration

Definition

from ledc.h:229

esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz);

Implemented in ledc.c:1095

Arguments

Argument

Description

speed_mode

Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.

timer_num

LEDC timer index (0-3), select from ledc_timer_t

freq_hz

Set the LEDC frequency

Return value

- ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current duty_resolution.

References

Code

Location

esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz)

ledc.c:1095

esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz);

ledc.h:229

Call Tree

ledc_set_freq() calls 5 functions:

ledc_set_freq()

esp_log_timestamp()

esp_log_write()

ledc_ll_get_duty_resolution()

ledc_set_timer_div()

ledc_hal_get_clk_cfg()

Data Use

ledc_set_freq() reads 14 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

soc_periph_ledc_clk_src_legacy_t::LEDC_AUTO_CLK

ledc_timer_t::LEDC_TIMER_MAX

ledc_mode_t::LEDC_SPEED_MODE_MAX

ledc_hal_context_t::dev

ledc_hal_context_t::speed_mode

ledc_set_freq()

Class Tree

All items filtered out

Override Tree

All items filtered out

Implementations

All items filtered out

Instances

Lifecycle

All items filtered out