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Initial board declarations for Thumby
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‎ports/raspberrypi/boards/tinycircuits_thumby/board.c‎

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// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2025 Cooper Dalrymple
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//
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// SPDX-License-Identifier: MIT
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#include "supervisor/board.h"
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#include "mpconfigboard.h"
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#include "shared-bindings/busio/SPI.h"
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#include "shared-bindings/fourwire/FourWire.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-module/displayio/__init__.h"
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#include "shared-module/displayio/mipi_constants.h"
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#include "shared-bindings/board/__init__.h"
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uint8_t display_init_sequence[] = {
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/*
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0, 0xae, // display off
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0xd5, 0, 0x80, // set display clock div
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0, 0xd3, 0, 0x00, // set display offset
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0, 0x40, // set start line
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0, 0xa4, // display all on, resume
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0, 0xa6, // normal display
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0, 0x8d, 0, 0x14, // charge pump
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0, 0x20, 0, 0x00, // memory mode
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0, 0xa0, // segremap
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0, 0xc0, // com scan increment
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0, 0x81, 0, 0xff, // set contrast
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0, 0xd9, 0, 0xf1, // set precharge
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0, 0xd8, 0, 0x20, // set v com detect
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0, 0xa8, 0, 40-1, // set multiplex
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0, 0xda, 0, 0x12, // set com pins
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0, 0xad, 0, 0x30,
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0, 0xaf, // on
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*/
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0xae, 0, // sleep
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0xd5, 1, 0x80, // fOsc divide by 2
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0xd3, 1, 0x00, // set display offset
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0x40, 1, 0x00, // set start line
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0xa4, 0, // display all on, resume
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0xa6, 0, // normal display
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0x8d, 1, 0x14, // charge pump
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0x20, 1, 0x00, // memory mode
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0xa0, 0, // segremap
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0xc0, 0, // com scan increment
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0x81, 1, 0xff, // set contrast
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0xd9, 1, 0xf1, // set precharge
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0xd8, 1, 0x20, // set v com detect
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0xa8, 1, 40-1, // set multiplex
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0xda, 1, 0x12, // set com pins
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0xad, 1, 0x30,
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0xaf, 0, // on
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};
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void board_init(void) {
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busio_spi_obj_t *spi = common_hal_board_create_spi(0);
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fourwire_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
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bus->base.type = &fourwire_fourwire_type;
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common_hal_fourwire_fourwire_construct(bus,
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spi,
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CIRCUITPY_BOARD_OLED_DC, // Command or data
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CIRCUITPY_BOARD_OLED_CS, // Chip select
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CIRCUITPY_BOARD_OLED_RESET, // Reset
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10000000, // Baudrate
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0, // Polarity
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0); // Phase
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busdisplay_busdisplay_obj_t *display = &allocate_display()->display;
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display->base.type = &busdisplay_busdisplay_type;
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common_hal_busdisplay_busdisplay_construct(
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display,
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bus,
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72, // Width (after rotation)
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40, // Height (after rotation)
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28, // column start
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0, // row start
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0, // rotation
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1, // Color depth
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true, // grayscale
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false, // pixels in byte share row. only used for depth < 8
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1, // bytes per cell. Only valid for depths < 8
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false, // reverse_pixels_in_byte. Only valid for depths < 8
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true, // reverse_pixels_in_word
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0, // Set column command
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0, // Set row command
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0, // Write memory command
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display_init_sequence,
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sizeof(display_init_sequence),
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NULL, // backlight pin
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0x81,
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1.0f, // brightness
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true, // single_byte_bounds
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true, // data_as_commands
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true, // auto_refresh
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60, // native_frames_per_second
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true, // backlight_on_high
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true, // SH1107_addressing
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50000); // backlight pwm frequency
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}
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void reset_board(void) {
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}

‎ports/raspberrypi/boards/tinycircuits_thumby/mpconfigboard.h‎

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// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2025 Cooper Dalrymple
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//
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// SPDX-License-Identifier: MIT
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#pragma once
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#define MICROPY_HW_BOARD_NAME "TinyCircuits Thumby"
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#define MICROPY_HW_MCU_NAME "rp2040"
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#define DEFAULT_SPI_BUS_SCK (&pin_GPIO18)
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#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO19)
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#define CIRCUITPY_BOARD_OLED_DC (&pin_GPIO17)
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#define CIRCUITPY_BOARD_OLED_CS (&pin_GPIO16)
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#define CIRCUITPY_BOARD_OLED_RESET (&pin_GPIO20)
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#define CIRCUITPY_BOARD_SPI (1)
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#define CIRCUITPY_BOARD_SPI_PIN {{.clock = DEFAULT_SPI_BUS_SCK, .mosi = DEFAULT_SPI_BUS_MOSI, .miso = NULL }}

‎ports/raspberrypi/boards/tinycircuits_thumby/mpconfigboard.mk‎

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USB_VID = 0x1D6B
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USB_PID = 0x0003
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USB_PRODUCT = "Thumby"
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USB_MANUFACTURER = "TinyCircuits"
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CHIP_VARIANT = RP2040
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CHIP_FAMILY = rp2
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EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
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CIRCUITPY_STAGE = 1
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CIRCUITPY_AUDIOIO = 1
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CIRCUITPY_AUDIOPWMIO = 1
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CIRCUITPY_KEYPAD = 1
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FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_framebuf
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FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_SSD1306
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FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_DisplayIO_SSD1306

‎ports/raspberrypi/boards/tinycircuits_thumby/pico-sdk-configboard.h‎

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// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#pragma once
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// Put board-specific pico-sdk definitions here. This file must exist.
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// Allow extra time for xosc to start.
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#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64

‎ports/raspberrypi/boards/tinycircuits_thumby/pins.c‎

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// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2025 Cooper Dalrymple
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//
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// SPDX-License-Identifier: MIT
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#include "shared-bindings/board/__init__.h"
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#include "shared-module/displayio/__init__.h"
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static const mp_rom_map_elem_t board_module_globals_table[] = {
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CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
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// Link Cable (ASR00074)
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{ MP_ROM_QSTR(MP_QSTR_EXT_TX), MP_ROM_PTR(&pin_GPIO0) },
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{ MP_ROM_QSTR(MP_QSTR_EXT), MP_ROM_PTR(&pin_GPIO1) },
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{ MP_ROM_QSTR(MP_QSTR_EXT_PU), MP_ROM_PTR(&pin_GPIO1) },
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// 0.42 inch OLED AST1042
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{ MP_ROM_QSTR(MP_QSTR_OLED_CS), MP_ROM_PTR(&pin_GPIO16) },
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{ MP_ROM_QSTR(MP_QSTR_OLED_DC), MP_ROM_PTR(&pin_GPIO17) },
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{ MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_GPIO18) },
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{ MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_GPIO19) },
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{ MP_ROM_QSTR(MP_QSTR_OLED_RESET), MP_ROM_PTR(&pin_GPIO20) },
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{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
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{ MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].display)},
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// Buttons
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_LEFT), MP_ROM_PTR(&pin_GPIO3) },
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_UP), MP_ROM_PTR(&pin_GPIO4) },
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_RIGHT), MP_ROM_PTR(&pin_GPIO5) },
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_DOWN), MP_ROM_PTR(&pin_GPIO6) },
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_1), MP_ROM_PTR(&pin_GPIO24) },
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{ MP_ROM_QSTR(MP_QSTR_BUTTON_2), MP_ROM_PTR(&pin_GPIO27) },
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// Mono PWM Speaker
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{ MP_ROM_QSTR(MP_QSTR_SPEAKER), MP_ROM_PTR(&pin_GPIO28) },
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// Hardware revision ID pins
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{ MP_OBJ_NEW_QSTR(MP_QSTR_ID3), MP_ROM_PTR(&pin_GPIO12) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_ID2), MP_ROM_PTR(&pin_GPIO13) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_ID1), MP_ROM_PTR(&pin_GPIO14) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_ID0), MP_ROM_PTR(&pin_GPIO15) },
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// Power pins
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{ MP_ROM_QSTR(MP_QSTR_VBUS_SENSE), MP_ROM_PTR(&pin_GPIO26) }
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};
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MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);

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