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driver(adc): esp32s2 support API adc2_vref_to_gpio

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fuzhibo
2020-06-03 17:38:10 +08:00
parent 934fe37c48
commit 885f8ce484
9 changed files with 180 additions and 78 deletions
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16
components/driver/esp32/include/driver/adc.h
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@@ -46,22 +46,6 @@ esp_err_t adc_i2s_mode_init(adc_unit_t adc_unit, adc_channel_t channel);
RTC controller setting
---------------------------------------------------------------*/
/**
* @brief Output ADC2 reference voltage to GPIO 25 or 26 or 27
*
* This function utilizes the testing mux exclusive to ADC 2 to route the
* reference voltage one of ADC2's channels. Supported GPIOs are GPIOs
* 25, 26, and 27. This refernce voltage can be manually read from the pin
* and used in the esp_adc_cal component.
*
* @param[in] gpio GPIO number (GPIOs 25, 26 and 27 are supported)
*
* @return
* - ESP_OK: v_ref successfully routed to selected GPIO
* - ESP_ERR_INVALID_ARG: Unsupported GPIO
*/
esp_err_t adc2_vref_to_gpio(gpio_num_t gpio);
/**
* @brief Read Hall Sensor
*