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circuitpython/ports/samd/boards/ADAFRUIT_FEATHER_M4_EXPRESS/mpconfigboard.h

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samd/boards: Add ADAFRUIT_FEATHER_M4_EXPRESS and _ITSYBITSY_M0_EXPRESS. These two boards are used for testing, so it is favorable to have them added early. The full test set is: - ADAFRUIT_FEATHER_M4_EXPRESS: SAMD51 with 32kHz crystal. - ADAFRUIT_ITSYBITSY_M0_EXPRESS: SAMD21 without crystal. - ADAFRUIT_ITSYBITSY_M4_EXPRESS: SAMD51 without crystal. - SEEED_XIAO: SAM21 with 32kHz crystal.
2022-06-04 09:42:56 -04:00
#define MICROPY_HW_BOARD_NAME "Feather M4 Express"
#define MICROPY_HW_MCU_NAME "SAMD51J19A"
samd/boards: Add missing/lost board config and pin definitions. Fixes are: - Pin definitions for ADAFRUIT_FEATHER_Mx_EXPRESS and ADAFRUIT_ITSYBITSY_M4_EXPRESS. - For ADAFRUIT_ITSYBITSY_M0_EXPRESS, change the MISO/MOSI name. - For MINISAM_M4, add the default SPI pins. - For boards with 32k crystal, add the XOSC32K setting.
2022-06-06 15:06:09 -04:00
samd/clock_config: Add HW_DFLL_USB_SYNC and HW_MCU_OSC32KULP extensions. Two new compile flags are: MICROPY_HW_DFLL_USB_SYNC: Effective only if DFLL48 does not run from the crystal. It will synchronize the DFLL48M clock with the USB's SOF pulse. If no USB is connected, it will fall back to open loop mode. The DFLL48M clock is then pretty precise, but with a higher clock jitter at SAMD51 devices. MICROPY_HW_MCU_OSC32KULP: Effective only if the devics uses a crystal as clock source. Run the MCU clock from the ULP 32kHz oszillator instead of the crystal. This flag was added to cater for a interference problem of the crystal and Neopixel/Debug pins at Adafruit FEATHER Mx boards, which causes the board to crash. Drawback: ticks_ms() and time.time() vs. than ticks_us() and the peripherals like PWM run at not synchronous clocks.
2022-06-15 12:58:02 -04:00
#define MICROPY_HW_XOSC32K (1)
#define MICROPY_HW_MCU_OSC32KULP (1)