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SourceVuESP-IDF Framework and ExamplesESP-IDFadc_lock_try_acquire()

adc_lock_try_acquire() function

Try to acquire ADC lock by unit The lock acquiring sequence will be: ADC1, ADC2, ...

Syntax

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Summary

Declaration

Definition

from adc_share_hw_ctrl.h:122

esp_err_t adc_lock_try_acquire(adc_unit_t adc_unit);

Implemented in adc_share_hw_ctrl.c:159

Arguments

Argument

Description

adc_unit

ADC unit ID

Return value

- ESP_OK: On success - ESP_ERR_TIMEOUT: Lock(s) is taken already

Notes

If any of the locks are taken, this API will return immediately with an error `ESP_ERR_TIMEOUT`

References

Code

Location

Referrer

esp_err_t adc_lock_try_acquire(adc_unit_t adc_unit)

adc_share_hw_ctrl.c:159

esp_err_t adc_lock_try_acquire(adc_unit_t adc_unit);

adc_share_hw_ctrl.h:122

if (adc_lock_try_acquire(ADC_UNIT_2) != ESP_OK) {

adc_legacy.c:452

adc2_config_channel_atten()

if (adc_lock_try_acquire(ADC_UNIT_2) != ESP_OK) {

adc_legacy.c:555

adc2_get_raw()

if (adc_lock_try_acquire(handle->unit_id) != ESP_OK) {

adc_oneshot.c:187

adc_oneshot_read()

Call Tree

adc_lock_try_acquire() is called by 3 functions and calls 1 function:

adc2_config_channel_atten()

adc2_get_raw()

adc_oneshot_read()

adc_lock_try_acquire()

_lock_try_acquire()

Data Use

adc_lock_try_acquire() reads 2 variables:

adc_unit_t::ADC_UNIT_1

adc_unit_t::ADC_UNIT_2

adc_lock_try_acquire()

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