circuitpython/ports/stm32/boards/ADAFRUIT_F405_EXPRESS/mpconfigboard.h

#define MICROPY_HW_BOARD_NAME       "Adafruit Feather STM32F405"
#define MICROPY_HW_MCU_NAME         "STM32F405RG"

#define MICROPY_HW_HAS_SWITCH       (0)
#define MICROPY_HW_HAS_FLASH        (1)
#define MICROPY_HW_HAS_MMA7660      (0)
#define MICROPY_HW_HAS_LCD          (0)
#define MICROPY_HW_ENABLE_RNG       (1)
#define MICROPY_HW_ENABLE_RTC       (1)
#define MICROPY_HW_ENABLE_SERVO     (1)
#define MICROPY_HW_ENABLE_DAC       (1)
#define MICROPY_HW_ENABLE_USB       (1)
#define MICROPY_HW_ENABLE_SDCARD    (1)
#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (0)

// HSE is 12MHz
#define MICROPY_HW_CLK_PLLM (12)
#define MICROPY_HW_CLK_PLLN (336)
#define MICROPY_HW_CLK_PLLP (RCC_PLLP_DIV2)
#define MICROPY_HW_CLK_PLLQ (7)
#define MICROPY_HW_CLK_LAST_FREQ (1)

// The Feather has a 32kHz crystal for the RTC
#define MICROPY_HW_RTC_USE_LSE      (1)
#define MICROPY_HW_RTC_USE_US       (0)
#define MICROPY_HW_RTC_USE_CALOUT   (1)

// External SPI Flash config
#if !MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE

#define MICROPY_HW_SPIFLASH_SIZE_BITS (16 * 1024 * 1024) // 16 Mbit (2 MByte)

#define MICROPY_HW_SPIFLASH_CS      (MICROPY_HW_SPI1_NSS)
#define MICROPY_HW_SPIFLASH_SCK     (MICROPY_HW_SPI1_SCK)
#define MICROPY_HW_SPIFLASH_MISO    (MICROPY_HW_SPI1_MISO)
#define MICROPY_HW_SPIFLASH_MOSI    (MICROPY_HW_SPI1_MOSI)

extern const struct _mp_spiflash_config_t spiflash_config;
extern struct _spi_bdev_t spi_bdev;
#define MICROPY_HW_SPIFLASH_ENABLE_CACHE (1)
#define MICROPY_HW_BDEV_IOCTL(op, arg) ( \
    (op) == BDEV_IOCTL_NUM_BLOCKS ? (MICROPY_HW_SPIFLASH_SIZE_BITS / 8 / FLASH_BLOCK_SIZE) : \
    (op) == BDEV_IOCTL_INIT ? spi_bdev_ioctl(&spi_bdev, (op), (uint32_t)&spiflash_config) : \
    spi_bdev_ioctl(&spi_bdev, (op), (arg)) \
)
#define MICROPY_HW_BDEV_READBLOCKS(dest, bl, n) spi_bdev_readblocks(&spi_bdev, (dest), (bl), (n))
#define MICROPY_HW_BDEV_WRITEBLOCKS(src, bl, n) spi_bdev_writeblocks(&spi_bdev, (src), (bl), (n))
#define MICROPY_HW_BDEV_SPIFLASH_EXTENDED (&spi_bdev) // for extended block protocol

#endif // !MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE

// UART config
#define MICROPY_HW_UART3_NAME   "UART3"    // on RX / TX
#define MICROPY_HW_UART3_TX     (pin_B10)  // TX
#define MICROPY_HW_UART3_RX     (pin_B11)  // RX
#define MICROPY_HW_UART3_RTS    (pin_B14)  // MISO
#define MICROPY_HW_UART3_CTS    (pin_B13)  // SCK

#define MICROPY_HW_UART2_NAME   "UART2"   // on SDA/SCL
#define MICROPY_HW_UART2_TX     (pin_B6)  // SCL
#define MICROPY_HW_UART2_RX     (pin_B7)  // SDA

#define MICROPY_HW_UART6_NAME   "UART6"   // on D5/D6
#define MICROPY_HW_UART6_TX     (pin_C6)  // D6
#define MICROPY_HW_UART6_RX     (pin_C7)  // D5

// I2C buses
#define MICROPY_HW_I2C1_NAME "I2C1"
#define MICROPY_HW_I2C1_SCL (pin_B6)  // SCL
#define MICROPY_HW_I2C1_SDA (pin_B7)  // SDA
#define MICROPY_HW_I2C2_NAME "I2C2"
#define MICROPY_HW_I2C2_SCL (pin_B10)  // TX
#define MICROPY_HW_I2C2_SDA (pin_B11)  // RX

// SPI buses
#define MICROPY_HW_SPI1_NAME "SPIFLASH"
#define MICROPY_HW_SPI1_NSS  (pin_A15) // FLASH CS
#define MICROPY_HW_SPI1_SCK  (pin_B3)  // FLASH CLK
#define MICROPY_HW_SPI1_MISO (pin_B4)  // FLASH MISO
#define MICROPY_HW_SPI1_MOSI (pin_B5)  // FLASH MOSI
#define MICROPY_HW_SPI2_NAME "SPI1"
#define MICROPY_HW_SPI2_NSS  (pin_B12) // SD DETECT
#define MICROPY_HW_SPI2_SCK  (pin_B13) // SCK
#define MICROPY_HW_SPI2_MISO (pin_B14) // MISO
#define MICROPY_HW_SPI2_MOSI (pin_B15) // MOSI

// CAN buses
#define MICROPY_HW_CAN1_NAME "CAN1"
#define MICROPY_HW_CAN1_TX   (pin_B9) // D10
#define MICROPY_HW_CAN1_RX   (pin_B8) // D9

// The Feather has 1 LED
#define MICROPY_HW_LED1             (pin_C1) // red
#define MICROPY_HW_LED_ON(pin)      (mp_hal_pin_high(pin))
#define MICROPY_HW_LED_OFF(pin)     (mp_hal_pin_low(pin))

// SD card detect switch
#define MICROPY_HW_SDCARD_DETECT_PIN        (pin_B12)
#define MICROPY_HW_SDCARD_DETECT_PULL       (GPIO_PULLUP)
#define MICROPY_HW_SDCARD_DETECT_PRESENT    (GPIO_PIN_RESET)

// USB config
#define MICROPY_HW_USB_FS              (1)
#define MICROPY_HW_USB_VBUS_DETECT_PIN (pin_A9)
#define MICROPY_HW_USB_OTG_ID_PIN      (pin_A10)

// Bootloader configuration (only needed if Mboot is used)
#define MBOOT_I2C_PERIPH_ID 1
#define MBOOT_I2C_SCL (pin_B8)
#define MBOOT_I2C_SDA (pin_B9)
#define MBOOT_I2C_ALTFUNC (4)