circuitpython/ports/stm32/boards/LEGO_HUB_NO6/bdev.c

65 lines
2.2 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/obj.h"
#include "storage.h"
#include "spi.h"
#define CMD_EXIT_4_BYTE_ADDRESS_MODE (0xE9)
STATIC const spi_proto_cfg_t spi_bus = {
.spi = &spi_obj[1], // SPI2 hardware peripheral
.baudrate = 25000000,
.polarity = 0,
.phase = 0,
.bits = 8,
.firstbit = SPI_FIRSTBIT_MSB,
};
STATIC mp_spiflash_cache_t spi_bdev_cache;
const mp_spiflash_config_t spiflash_config = {
.bus_kind = MP_SPIFLASH_BUS_SPI,
.bus.u_spi.cs = MICROPY_HW_SPIFLASH_CS,
.bus.u_spi.data = (void *)&spi_bus,
.bus.u_spi.proto = &spi_proto,
.cache = &spi_bdev_cache,
};
spi_bdev_t spi_bdev;
int32_t board_bdev_ioctl(void) {
int32_t ret = spi_bdev_ioctl(&spi_bdev, BDEV_IOCTL_INIT, (uint32_t)&spiflash_config);
// Exit 4-byte address mode
uint8_t cmd = CMD_EXIT_4_BYTE_ADDRESS_MODE;
mp_hal_pin_write(MICROPY_HW_SPIFLASH_CS, 0);
spi_proto.transfer(MP_OBJ_FROM_PTR(&spi_bus), 1, &cmd, NULL);
mp_hal_pin_write(MICROPY_HW_SPIFLASH_CS, 1);
return ret;
}