circuitpython/ports/atmel-samd/boards/robohatmm1_m0/mpconfigboard.h

#define MICROPY_HW_BOARD_NAME "Robo HAT MM1 M0"
#define MICROPY_HW_MCU_NAME "samd21g18"

#define MICROPY_HW_LED_STATUS   (&pin_PB22)

// Salae reads 12mhz which is the limit even though we set it to the safer 8mhz.
#define SPI_FLASH_BAUDRATE  (8000000)

// On-board flash
#define SPI_FLASH_MOSI_PIN          &pin_PA12
#define SPI_FLASH_MISO_PIN          &pin_PA14
#define SPI_FLASH_SCK_PIN           &pin_PA13
#define SPI_FLASH_CS_PIN            &pin_PA15

// These are pins not to reset.
#define MICROPY_PORT_A        ( 0 ) //PORT_PA06
#define MICROPY_PORT_B        ( 0 )
#define MICROPY_PORT_C        ( 0 )


// If you change this, then make sure to update the linker scripts as well to
// make sure you don't overwrite code.
#define CIRCUITPY_INTERNAL_NVM_SIZE 256

#define BOARD_FLASH_SIZE (0x00040000 - 0x2000 - CIRCUITPY_INTERNAL_NVM_SIZE)

#define CALIBRATE_CRYSTALLESS 1

#define DEFAULT_I2C_BUS_SCL (&pin_PA23)
#define DEFAULT_I2C_BUS_SDA (&pin_PA22)

#define DEFAULT_SPI_BUS_SCK (&pin_PB09)
#define DEFAULT_SPI_BUS_MOSI (&pin_PB08)
#define DEFAULT_SPI_BUS_MISO (&pin_PB11)

//#define DEFAULT_UART_BUS_RX (&pin_PB03)
//#define DEFAULT_UART_BUS_TX (&pin_PB02)

// USB is always used internally so skip the pin objects for it.
#define IGNORE_PIN_PA24     1
#define IGNORE_PIN_PA25     1