1 /* ADC1 Example
 2 
 3    This example code is in the Public Domain (or CC0 licensed, at your option.)
 4 
 5    Unless required by applicable law or agreed to in writing, this
 6    software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 7    CONDITIONS OF ANY KIND, either express or implied.
 8 */
 9 #include <stdio.h>
10 #include <string.h>
11 #include <stdlib.h>
12 #include "freertos/FreeRTOS.h"
13 #include "freertos/task.h"
14 #include "freertos/queue.h"
15 #include "driver/gpio.h"
16 #include "driver/adc.h"
17 
18 #define ADC1_TEST_CHANNEL (4)
19 
20 void adc1task(void* arg)
21 {
22     // initialize ADC
23     adc1_config_width(ADC_WIDTH_12Bit);
24     adc1_config_channel_atten(ADC1_TEST_CHANNEL,ADC_ATTEN_11db);
25     while(1){
26         printf("The adc1 value:%d\n",adc1_get_voltage(ADC1_TEST_CHANNEL));
27         vTaskDelay(1000/portTICK_PERIOD_MS);
28     }
29 }
30 
31 void app_main()
32 {
33     xTaskCreate(adc1task, "adc1task", 1024*3, NULL, 10, NULL);
34 }