571864e8ae
There used to be dummy phase before out phase in common command transactions. This corrupts the data. The code before never actually operate (clear) the QE bit, once it finds the QE bit is set. It's hard to check whether the QE set/disable functions work well. This commit: 1. Cancel the dummy phase 2. Set and clear the QE bit according to chip settings, allowing tests for QE bits. However for some chips (Winbond for example), it's not forced to clear the QE bit if not able to. 3. Also refactor to allow chip_generic and other chips to share the same code to read and write qe bit; let common command and read command share configure_host_io_mode. 4. Rename read mode to io mode since maybe we will write data with quad mode one day.
56 lines
2 KiB
C
56 lines
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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/// 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_id; ///< CS pin (signal) 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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} 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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