kopia lustrzana https://github.com/micropython/micropython
65 wiersze
2.2 KiB
C
65 wiersze
2.2 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) 2021 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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#include "spi.h"
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#define CMD_EXIT_4_BYTE_ADDRESS_MODE (0xE9)
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STATIC const spi_proto_cfg_t spi_bus = {
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.spi = &spi_obj[1], // SPI2 hardware peripheral
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.baudrate = 25000000,
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.polarity = 0,
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.phase = 0,
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.bits = 8,
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.firstbit = SPI_FIRSTBIT_MSB,
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};
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STATIC mp_spiflash_cache_t spi_bdev_cache;
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const mp_spiflash_config_t spiflash_config = {
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.bus_kind = MP_SPIFLASH_BUS_SPI,
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.bus.u_spi.cs = MICROPY_HW_SPIFLASH_CS,
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.bus.u_spi.data = (void *)&spi_bus,
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.bus.u_spi.proto = &spi_proto,
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.cache = &spi_bdev_cache,
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};
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spi_bdev_t spi_bdev;
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int32_t board_bdev_ioctl(void) {
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int32_t ret = spi_bdev_ioctl(&spi_bdev, BDEV_IOCTL_INIT, (uint32_t)&spiflash_config);
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// Exit 4-byte address mode
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uint8_t cmd = CMD_EXIT_4_BYTE_ADDRESS_MODE;
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mp_hal_pin_write(MICROPY_HW_SPIFLASH_CS, 0);
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spi_proto.transfer(MP_OBJ_FROM_PTR(&spi_bus), 1, &cmd, NULL);
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mp_hal_pin_write(MICROPY_HW_SPIFLASH_CS, 1);
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return ret;
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}
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