79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
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/*
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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) 2017-2018 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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#include "py/obj.h"
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#include "storage.h"
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#if defined(MICROPY_HW_SPIFLASH_SIZE_BITS)
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#include "drivers/memory/spiflash.h"
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#include "genhdr/pins.h"
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STATIC const mp_machine_soft_spi_obj_t spiflash_spi_bus = {
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.base = {&mp_machine_soft_spi_type},
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.delay_half = MICROPY_PY_MACHINE_SPI_MIN_DELAY,
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.polarity = 0,
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.phase = 0,
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.sck = &MICROPY_HW_SPIFLASH_SCK,
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.mosi = &MICROPY_HW_SPIFLASH_MOSI,
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.miso = &MICROPY_HW_SPIFLASH_MISO,
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};
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STATIC const mp_spiflash_t spiflash = {
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.cs = &MICROPY_HW_SPIFLASH_CS,
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.spi = (mp_obj_base_t*)&spiflash_spi_bus.base,
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};
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void spi_bdev_init(void) {
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mp_spiflash_init((mp_spiflash_t*)&spiflash);
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}
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bool spi_bdev_readblock(uint8_t *dest, uint32_t block) {
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// we must disable USB irqs to prevent MSC contention with SPI flash
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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mp_spiflash_read((mp_spiflash_t*)&spiflash,
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block * FLASH_BLOCK_SIZE, FLASH_BLOCK_SIZE, dest);
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restore_irq_pri(basepri);
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return true;
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}
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bool spi_bdev_writeblock(const uint8_t *src, uint32_t block) {
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// we must disable USB irqs to prevent MSC contention with SPI flash
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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int ret = mp_spiflash_write((mp_spiflash_t*)&spiflash,
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block * FLASH_BLOCK_SIZE, FLASH_BLOCK_SIZE, src);
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restore_irq_pri(basepri);
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return ret == 0;
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}
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#endif // defined(MICROPY_HW_SPIFLASH_SIZE_BITS)
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