90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016-2018 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_DRIVERS_MEMORY_SPIFLASH_H
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#define MICROPY_INCLUDED_DRIVERS_MEMORY_SPIFLASH_H
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#include "drivers/bus/spi.h"
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#include "drivers/bus/qspi.h"
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#define MP_SPIFLASH_ERASE_BLOCK_SIZE (4096) // must be a power of 2
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enum {
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MP_SPIFLASH_BUS_SPI,
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MP_SPIFLASH_BUS_QSPI,
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};
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struct _mp_spiflash_t;
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#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
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// A cache must be provided by the user in the config struct. The same cache
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// struct can be shared by multiple SPI flash instances.
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typedef struct _mp_spiflash_cache_t {
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uint8_t buf[MP_SPIFLASH_ERASE_BLOCK_SIZE] __attribute__((aligned(4)));
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struct _mp_spiflash_t *user; // current user of buf, for shared use
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uint32_t block; // current block stored in buf; 0xffffffff if invalid
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} mp_spiflash_cache_t;
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#endif
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typedef struct _mp_spiflash_config_t {
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uint32_t bus_kind;
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union {
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struct {
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mp_hal_pin_obj_t cs;
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void *data;
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const mp_spi_proto_t *proto;
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} u_spi;
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struct {
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void *data;
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const mp_qspi_proto_t *proto;
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} u_qspi;
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} bus;
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#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
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mp_spiflash_cache_t *cache; // can be NULL if cache functions not used
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#endif
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} mp_spiflash_config_t;
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typedef struct _mp_spiflash_t {
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const mp_spiflash_config_t *config;
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volatile uint32_t flags;
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} mp_spiflash_t;
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void mp_spiflash_init(mp_spiflash_t *self);
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void mp_spiflash_deepsleep(mp_spiflash_t *self, int value);
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// These functions go direct to the SPI flash device
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int mp_spiflash_erase_block(mp_spiflash_t *self, uint32_t addr);
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int mp_spiflash_read(mp_spiflash_t *self, uint32_t addr, size_t len, uint8_t *dest);
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int mp_spiflash_write(mp_spiflash_t *self, uint32_t addr, size_t len, const uint8_t *src);
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#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
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// These functions use the cache (which must already be configured)
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int mp_spiflash_cache_flush(mp_spiflash_t *self);
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int mp_spiflash_cached_read(mp_spiflash_t *self, uint32_t addr, size_t len, uint8_t *dest);
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int mp_spiflash_cached_write(mp_spiflash_t *self, uint32_t addr, size_t len, const uint8_t *src);
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#endif
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#endif // MICROPY_INCLUDED_DRIVERS_MEMORY_SPIFLASH_H
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