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dpgeorgedpgeorge
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stm32/boards/STM32L476DISC: Provide SPI-flash bdev config.
This board shows how to configure external SPI flash as the main storage medium. It uses software SPI.
1 parent 626d6c9 commit bb3359f

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‎ports/stm32/boards/STM32L476DISC/bdev.c‎

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#include "storage.h"
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#include "genhdr/pins.h"
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// External SPI flash uses standard SPI interface
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const mp_soft_spi_obj_t soft_spi_bus = {
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.delay_half = MICROPY_HW_SOFTSPI_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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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*)&soft_spi_bus,
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.bus.u_spi.proto = &mp_soft_spi_proto,
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};
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spi_bdev_t spi_bdev;

‎ports/stm32/boards/STM32L476DISC/mpconfigboard.h‎

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@@ -4,6 +4,7 @@ void STM32L476DISC_board_early_init(void);
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#define MICROPY_HW_BOARD_NAME "L476-DISCO"
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#define MICROPY_HW_MCU_NAME "STM32L476"
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#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (0)
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#define MICROPY_HW_HAS_SWITCH (1)
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#define MICROPY_HW_HAS_FLASH (1)
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#define MICROPY_HW_ENABLE_RNG (1)
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#define MICROPY_HW_SPIFLASH_MOSI (pin_E12)
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#define MICROPY_HW_SPIFLASH_MISO (pin_E13)
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// block device config for SPI flash
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extern const struct _mp_spiflash_config_t spiflash_config;
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extern struct _spi_bdev_t spi_bdev;
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#define MICROPY_HW_BDEV_IOCTL(op, arg) ( \
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(op) == BDEV_IOCTL_NUM_BLOCKS ? (MICROPY_HW_SPIFLASH_SIZE_BITS / 8 / FLASH_BLOCK_SIZE) : \
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(op) == BDEV_IOCTL_INIT ? spi_bdev_ioctl(&spi_bdev, (op), (uint32_t)&spiflash_config) : \
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spi_bdev_ioctl(&spi_bdev, (op), (arg)) \
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)
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#define MICROPY_HW_BDEV_READBLOCKS(dest, bl, n) spi_bdev_readblocks(&spi_bdev, (dest), (bl), (n))
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#define MICROPY_HW_BDEV_WRITEBLOCKS(src, bl, n) spi_bdev_writeblocks(&spi_bdev, (src), (bl), (n))
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// MSI is used and is 4MHz
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#define MICROPY_HW_CLK_PLLM (1)
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#define MICROPY_HW_CLK_PLLN (40)

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