89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <inttypes.h>
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#include "esp_log.h"
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#include "esp_check.h"
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#include "driver/gpio.h"
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#include "button_matrix.h"
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#include "button_interface.h"
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static const char *TAG = "matrix_button";
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typedef struct {
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button_driver_t base; /**< base button driver */
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int32_t row_gpio_num; /**< row gpio */
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int32_t col_gpio_num; /**< col gpio */
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} button_matrix_obj;
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static esp_err_t button_matrix_gpio_init(int32_t gpio_num, gpio_mode_t mode)
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{
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ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(gpio_num), ESP_ERR_INVALID_ARG, TAG, "gpio_num error");
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gpio_config_t gpio_conf = {0};
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gpio_conf.intr_type = GPIO_INTR_DISABLE;
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gpio_conf.pull_down_en = GPIO_PULLDOWN_ENABLE;
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gpio_conf.pin_bit_mask = (1ULL << gpio_num);
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gpio_conf.mode = mode;
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gpio_config(&gpio_conf);
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return ESP_OK;
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}
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esp_err_t button_matrix_del(button_driver_t *button_driver)
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{
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button_matrix_obj *matrix_btn = __containerof(button_driver, button_matrix_obj, base);
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//Reset an gpio to default state (select gpio function, enable pullup and disable input and output).
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gpio_reset_pin(matrix_btn->row_gpio_num);
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gpio_reset_pin(matrix_btn->col_gpio_num);
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free(matrix_btn);
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return ESP_OK;
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}
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uint8_t button_matrix_get_key_level(button_driver_t *button_driver)
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{
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button_matrix_obj *matrix_btn = __containerof(button_driver, button_matrix_obj, base);
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gpio_set_level(matrix_btn->row_gpio_num, 1);
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uint8_t level = gpio_get_level(matrix_btn->col_gpio_num);
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gpio_set_level(matrix_btn->row_gpio_num, 0);
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return level;
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}
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esp_err_t iot_button_new_matrix_device(const button_config_t *button_config, const button_matrix_config_t *matrix_config, button_handle_t *ret_button, size_t *size)
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{
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esp_err_t ret = ESP_OK;
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ESP_RETURN_ON_FALSE(button_config && matrix_config && ret_button, ESP_ERR_INVALID_ARG, TAG, "Invalid argument");
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ESP_RETURN_ON_FALSE(matrix_config->col_gpios && matrix_config->row_gpios, ESP_ERR_INVALID_ARG, TAG, "Invalid matrix config");
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ESP_RETURN_ON_FALSE(matrix_config->col_gpio_num > 0 && matrix_config->row_gpio_num > 0, ESP_ERR_INVALID_ARG, TAG, "Invalid matrix config");
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ESP_RETURN_ON_FALSE(*size == matrix_config->row_gpio_num * matrix_config->col_gpio_num, ESP_ERR_INVALID_ARG, TAG, "Invalid size");
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button_matrix_obj *matrix_btn = calloc(*size, sizeof(button_matrix_obj));
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for (int i = 0; i < matrix_config->row_gpio_num; i++) {
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button_matrix_gpio_init(matrix_config->row_gpios[i], GPIO_MODE_OUTPUT);
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}
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for (int i = 0; i < matrix_config->col_gpio_num; i++) {
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button_matrix_gpio_init(matrix_config->col_gpios[i], GPIO_MODE_INPUT);
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}
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for (int i = 0; i < *size; i++) {
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matrix_btn[i].base.get_key_level = button_matrix_get_key_level;
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matrix_btn[i].base.del = button_matrix_del;
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matrix_btn[i].row_gpio_num = matrix_config->row_gpios[i / matrix_config->col_gpio_num];
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matrix_btn[i].col_gpio_num = matrix_config->col_gpios[i % matrix_config->col_gpio_num];
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ESP_LOGD(TAG, "row_gpio_num: %"PRId32", col_gpio_num: %"PRId32"", matrix_btn[i].row_gpio_num, matrix_btn[i].col_gpio_num);
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ret = iot_button_create(button_config, &matrix_btn[i].base, &ret_button[i]);
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ESP_GOTO_ON_FALSE(ret == ESP_OK, ESP_FAIL, err, TAG, "Create button failed");
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}
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*size = matrix_config->row_gpio_num * matrix_config->col_gpio_num;
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return ESP_OK;
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err:
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if (matrix_btn) {
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free(matrix_btn);
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}
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return ret;
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}
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