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