1 // Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include "driver/adc.h" 18 19 /**@{*/ 20 /** 21 * Tie the ADC channel input to the middle (1.4V) by connecting both internal pullup and pulldown. 22 * 23 * `tie_middle`: 1.4v; 24 * `tie_high` : 3.3v; 25 * `tie_low` : 0v; 26 * 27 * @param adc_unit_t ADC unit. 28 * @param adc_channel_t ADC channel. 29 */ 30 void adc_fake_tie_middle(adc_unit_t adc_unit, adc_channel_t channel); 31 void adc_fake_tie_high(adc_unit_t adc_unit, adc_channel_t channel); 32 void adc_fake_tie_low(adc_unit_t adc_unit, adc_channel_t channel); 33 void adc_io_normal(adc_unit_t adc_unit, adc_channel_t channel); 34 /**@}*/ 35
