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

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#define MICROPY_HW_BOARD_NAME "keithp.com snekboard"
#define MICROPY_HW_MCU_NAME "samd21g18"
#define MICROPY_HW_LED_STATUS (&pin_PA02)
#define MICROPY_HW_NEOPIXEL (&pin_PB11)
#define SPI_FLASH_MOSI_PIN &pin_PB22
#define SPI_FLASH_MISO_PIN &pin_PB03
#define SPI_FLASH_SCK_PIN &pin_PB23
#define SPI_FLASH_CS_PIN &pin_PA27
// These are pins not to reset.
#define MICROPY_PORT_A (PORT_PB11)
#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 BOARD_HAS_CRYSTAL 0
#define DEFAULT_I2C_BUS_SCL (&pin_PA08) /* ANALOG 5 */
#define DEFAULT_I2C_BUS_SDA (&pin_PA09) /* ANALOG 6 */
#define DEFAULT_UART_BUS_RX (&pin_PB08) /* ANALOG 1 */
#define DEFAULT_UART_BUS_TX (&pin_PB09) /* ANALOG 2 */
// USB is always used internally so skip the pin objects for it.
#define IGNORE_PIN_PA24 1
#define IGNORE_PIN_PA25 1