1 /* Matrix Keyboard (based on dedicated GPIO) 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 "esp_log.h"
11 #include "matrix_keyboard.h"
12
13 const static char *TAG = "example";
14
15 /**
16 * @brief Matrix keyboard event handler
17 * @note This function is run under OS timer task context
18 */
example_matrix_kbd_event_handler(matrix_kbd_handle_t mkbd_handle,matrix_kbd_event_id_t event,void * event_data,void * handler_args)19 esp_err_t example_matrix_kbd_event_handler(matrix_kbd_handle_t mkbd_handle, matrix_kbd_event_id_t event, void *event_data, void *handler_args)
20 {
21 uint32_t key_code = (uint32_t)event_data;
22 switch (event) {
23 case MATRIX_KBD_EVENT_DOWN:
24 ESP_LOGI(TAG, "press event, key code = %04x", key_code);
25 break;
26 case MATRIX_KBD_EVENT_UP:
27 ESP_LOGI(TAG, "release event, key code = %04x", key_code);
28 break;
29 }
30 return ESP_OK;
31 }
32
app_main(void)33 void app_main(void)
34 {
35 matrix_kbd_handle_t kbd = NULL;
36 // Apply default matrix keyboard configuration
37 matrix_kbd_config_t config = MATRIX_KEYBOARD_DEFAULT_CONFIG();
38 // Set GPIOs used by row and column line
39 config.col_gpios = (int[]) {
40 10, 11, 12, 13
41 };
42 config.nr_col_gpios = 4;
43 config.row_gpios = (int[]) {
44 14, 15, 16, 17
45 };
46 config.nr_row_gpios = 4;
47 // Install matrix keyboard driver
48 matrix_kbd_install(&config, &kbd);
49 // Register keyboard input event handler
50 matrix_kbd_register_event_handler(kbd, example_matrix_kbd_event_handler, NULL);
51 // Keyboard start to work
52 matrix_kbd_start(kbd);
53 }
54
