How to use GPIO14 of ESP-WROOM-32 with ESP-IDF

[hiruma]

It will be first post.
I can't use GPIO14 of ESP-WROOM-32 with ESP-IDF.

I can use GPIO14 with arduino IDE as shown in the example below.

Code: [Select all] [Expand/Collapse]

1. void setup() {
2.   pinMode(14, OUTPUT);
3.   pinMode(25, OUTPUT);
4.   pinMode(26, OUTPUT);
5.   pinMode(27, OUTPUT);
6. }
7.  
8. void loop() {
9.   digitalWrite(14, HIGH);
10.   digitalWrite(25, LOW);
11.   digitalWrite(26, HIGH);
12.   digitalWrite(27, LOW);
13. }

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But I can't use GPIO14 with ESP-IDF.
The program was downloaded from the URL:https://github.com/espressif/esp-idf-template.git ,and I changed "GPIO_NUM_4" to "GPIO_NUM_14".
The result is that a LED of GPIO 14 is lit dark,but GPIO25 is used normally.

Code: [Select all] [Expand/Collapse]

1. #include "freertos/FreeRTOS.h"
2. #include "esp_wifi.h"
3. #include "esp_system.h"
4. #include "esp_event.h"
5. #include "esp_event_loop.h"
6. #include "nvs_flash.h"
7. #include "driver/gpio.h"
8.  
9. esp_err_t event_handler(void *ctx, system_event_t *event)
10. {
11.     return ESP_OK;
12. }
13.  
14. void app_main(void)
15. {
16.  
17.     nvs_flash_init();
18.     tcpip_adapter_init();
19.     ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
20.     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
21.     ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
22.     ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
23.     ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
24.     wifi_config_t sta_config = {
25.         .sta = {
26.             .ssid = CONFIG_ESP_WIFI_SSID,
27.             .password = CONFIG_ESP_WIFI_PASSWORD,
28.             .bssid_set = false
29.         }
30.     };
31.     ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &sta_config) );
32.     ESP_ERROR_CHECK( esp_wifi_start() );
33.     ESP_ERROR_CHECK( esp_wifi_connect() );
34.  
35.     gpio_set_direction(GPIO_NUM_14, GPIO_MODE_OUTPUT);
36.     gpio_set_direction(GPIO_NUM_25, GPIO_MODE_OUTPUT);
37.     gpio_set_direction(GPIO_NUM_26, GPIO_MODE_OUTPUT);
38.     gpio_set_direction(GPIO_NUM_27, GPIO_MODE_OUTPUT);
39.     gpio_set_level(GPIO_NUM_14, 1);
40.     gpio_set_level(GPIO_NUM_26, 1);
41.     gpio_set_level(GPIO_NUM_27, 1);
42.     int level = 0;
43.     while (true) {
44.         gpio_set_level(GPIO_NUM_25, level);
45.         level = !level;
46.         vTaskDelay(300 / portTICK_PERIOD_MS);
47.     }
48. }

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Who knows the reason for this phenomenon and solutions?

[WiFive]

Code: Select all

gpio_reset_pin(14);

[hiruma]

Thank you very much, Mr./Ms. WiFive.
I can use GPIO14.