esp-idf/components/spi_flash/include/esp_flash_spi_init.h

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// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include "hal/spi_types.h"
#include "esp_flash.h"
#ifdef __cplusplus
extern "C" {
#endif
/// Configurations for the SPI Flash to init
typedef struct {
spi_host_device_t host_id; ///< Bus to use
int cs_io_num; ///< GPIO pin to output the CS signal
esp_flash_io_mode_t io_mode; ///< IO mode to read from the Flash
esp_flash_speed_t speed; ///< Speed of the Flash clock
int input_delay_ns; ///< Input delay of the data pins, in ns. Set to 0 if unknown.
/**
* CS line ID, ignored when not `host_id` is not SPI1_HOST, or
* `CONFIG_SPI_FLASH_SHARE_SPI1_BUS` is enabled. In this case, the CS line used is
* automatically assigned by the SPI bus lock.
*/
int cs_id;
} esp_flash_spi_device_config_t;
/**
* Add a SPI Flash device onto the SPI bus.
*
* The bus should be already initialized by ``spi_bus_initialization``.
*
* @param out_chip Pointer to hold the initialized chip.
* @param config Configuration of the chips to initialize.
*
* @return
* - ESP_ERR_INVALID_ARG: out_chip is NULL, or some field in the config is invalid.
* - ESP_ERR_NO_MEM: failed to allocate memory for the chip structures.
* - ESP_OK: success.
*/
esp_err_t spi_bus_add_flash_device(esp_flash_t **out_chip, const esp_flash_spi_device_config_t *config);
/**
* Remove a SPI Flash device from the SPI bus.
*
* @param chip The flash device to remove.
*
* @return
* - ESP_ERR_INVALID_ARG: The chip is invalid.
* - ESP_OK: success.
*/
esp_err_t spi_bus_remove_flash_device(esp_flash_t *chip);
#ifdef __cplusplus
}
#endif