59 lines
2 KiB
C
59 lines
2 KiB
C
/*
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* SPDX-FileCopyrightText: 2023-2024 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 "esp_log.h"
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#include "driver/gpio.h"
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#include "button_matrix.h"
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static const char *TAG = "matrix button";
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#define MATRIX_BTN_CHECK(a, str, ret_val) \
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if (!(a)) \
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{ \
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ESP_LOGE(TAG, "%s(%d): %s", __FUNCTION__, __LINE__, str); \
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return (ret_val); \
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}
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esp_err_t button_matrix_init(const button_matrix_config_t *config)
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{
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MATRIX_BTN_CHECK(NULL != config, "Pointer of config is invalid", ESP_ERR_INVALID_ARG);
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MATRIX_BTN_CHECK(GPIO_IS_VALID_GPIO(config->row_gpio_num), "row GPIO number error", ESP_ERR_INVALID_ARG);
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MATRIX_BTN_CHECK(GPIO_IS_VALID_GPIO(config->col_gpio_num), "col GPIO number error", ESP_ERR_INVALID_ARG);
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// set row gpio as output
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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.mode = GPIO_MODE_OUTPUT;
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gpio_conf.pull_down_en = GPIO_PULLDOWN_ENABLE;
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gpio_conf.pin_bit_mask = (1ULL << config->row_gpio_num);
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gpio_config(&gpio_conf);
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// set col gpio as input
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gpio_conf.mode = GPIO_MODE_INPUT;
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gpio_conf.pin_bit_mask = (1ULL << config->col_gpio_num);
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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_deinit(int row_gpio_num, int col_gpio_num)
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{
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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(row_gpio_num);
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gpio_reset_pin(col_gpio_num);
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return ESP_OK;
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}
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uint8_t button_matrix_get_key_level(void *hardware_data)
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{
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uint32_t row = MATRIX_BUTTON_SPLIT_ROW(hardware_data);
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uint32_t col = MATRIX_BUTTON_SPLIT_COL(hardware_data);
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gpio_set_level(row, 1);
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uint8_t level = gpio_get_level(col);
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gpio_set_level(row, 0);
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return level;
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}
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