board.c

// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
//
// SPDX-License-Identifier: MIT

#include "supervisor/board.h"
#include "mpconfigboard.h"

#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/fourwire/FourWire.h"
#include "shared-module/displayio/__init__.h"
#include "shared-module/displayio/mipi_constants.h"


#define DELAY 0x80

uint8_t display_init_sequence[] = {
    0x01, 0 | DELAY, 150, // SWRESET
    0x11, 0 | DELAY, 255, // SLPOUT
    0x36, 1, 0b10100000,  // _MADCTL for rotation 0
    0x3a, 1, 0x55, // COLMOD - 16bit color
    0x21, 0 | DELAY, 10,  // _INVON
    0x13, 0 | DELAY, 10,  // _NORON
    0x29, 0 | DELAY, 255, // _DISPON
};

void board_init(void) {
    fourwire_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
    busio_spi_obj_t *spi = &bus->inline_bus;
    common_hal_busio_spi_construct(spi, &pin_P0_07, &pin_P1_08, NULL, false); // SCK, MOSI, MISO, not half-duplex
    common_hal_busio_spi_never_reset(spi);

    bus->base.type = &fourwire_fourwire_type;
    common_hal_fourwire_fourwire_construct(bus,
        spi,
        &pin_P0_27, // TFT_DC Command or data
        &pin_P0_05, // TFT_CS Chip select
        NULL, // no  TFT_RST Reset
        // &pin_P1_14, // TFT_RST Reset
        60000000, // Baudrate
        0, // Polarity
        0); // Phase

    busdisplay_busdisplay_obj_t *display = &allocate_display()->display;
    display->base.type = &busdisplay_busdisplay_type;
    common_hal_busdisplay_busdisplay_construct(display,
        bus,
        240, // Width (after rotation)
        240, // Height (after rotation)
        80, // column start
        0, // row start
        180, // rotation
        16, // Color depth
        false, // Grayscale
        false, // Pixels in a byte share a row. Only used for depth < 8
        1, // bytes per cell. Only valid for depths < 8
        false, // reverse_pixels_in_byte. Only valid for depths < 8
        true, // reverse_pixels_in_word
        MIPI_COMMAND_SET_COLUMN_ADDRESS, // Set column command
        MIPI_COMMAND_SET_PAGE_ADDRESS, // Set row command
        MIPI_COMMAND_WRITE_MEMORY_START, // Write memory command
        display_init_sequence,
        sizeof(display_init_sequence),
        &pin_P1_13,  // backlight pin
        NO_BRIGHTNESS_COMMAND,
        1.0f, // brightness
        false, // single_byte_bounds
        false, // data_as_commands
        true, // auto_refresh
        60, // native_frames_per_second
        true, // backlight_on_high
        false, // SH1107_addressing
        50000); // backlight pwm frequency
}