circuitpython/ports/espressif/boards/m5stack_atoms3/board.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "supervisor/board.h"
#include "mpconfigboard.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/displayio/FourWire.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-module/displayio/__init__.h"
#include "shared-module/displayio/mipi_constants.h"
#include "shared-bindings/board/__init__.h"

displayio_fourwire_obj_t board_display_obj;

#define DELAY 0x80

// display init sequence according to LilyGO example app
uint8_t display_init_sequence[] = {
    // sw reset
    0x01, 0 | DELAY, 0x96,
    // sleep out
    0x11, 0 | DELAY, 0xff,
    // normal display mode on
    // 0x13, 0,
    // display and color format settings
    // 0x36, 1, 0x68,
    // 0xB6, 2, 0x0A, 0x82,
    0x3A, 1 | DELAY,  0x55, 0x0a,
    0x36, 0x01, 0x08, // _MADCTL
    0x21, 0x80, 0x0A, // _INVON Hack and Delay 10ms
    0x13, 0x80, 0x0A, // _NORON and Delay 10ms
    0x36, 0x01, 0xC0, // _MADCTL
    // ST7789V frame rate setting
    // 0xB2, 5, 0x0C, 0x0C, 0x00, 0x33, 0x33,
    // voltages: VGH / VGL
    // 0xB7, 1, 0x35,
    // ST7789V power setting
    // 0xBB, 1, 0x28,
    // 0xC0, 1, 0x0C,
    // 0xC2, 2, 0x01, 0xFF,
    // 0xC3, 1, 0x10,
    // 0xC4, 1, 0x20,
    // 0xC6, 1, 0x0F,
    // 0xD0, 2, 0xA4, 0xA1,
    // ST7789V gamma setting
    // 0xE0, 14, 0xD0, 0x00, 0x02, 0x07, 0x0A, 0x28, 0x32, 0x44, 0x42, 0x06, 0x0E, 0x12, 0x14, 0x17,
    // 0xE1, 14, 0xD0, 0x00, 0x02, 0x07, 0x0A, 0x28, 0x31, 0x54, 0x47, 0x0E, 0x1C, 0x17, 0x1B, 0x1E,
    // 0x21, 0,
    // display on
    0x29, 0 | DELAY, 0xff
};


void board_init(void) {
    displayio_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
    // busio_spi_obj_t *spi = common_hal_board_create_spi(0);
    busio_spi_obj_t *spi = &bus->inline_bus;
    common_hal_busio_spi_construct(spi, &pin_GPIO17, &pin_GPIO21, NULL, false);
    common_hal_busio_spi_never_reset(spi);
    bus->base.type = &displayio_fourwire_type;

    common_hal_displayio_fourwire_construct(
        bus,
        spi,
        &pin_GPIO33,    // DC
        &pin_GPIO15,    // CS
        &pin_GPIO34,    // RST
        40000000,       // baudrate
        0,              // polarity
        0               // phase
        );
    displayio_display_obj_t *display = &allocate_display()->display;
    display->base.type = &displayio_display_type;

    common_hal_displayio_display_construct(
        display,
        bus,
        128,            // width (after rotation)
        128,            // height (after rotation)
        2,             // column start
        1,             // row start
        0,              // rotation
        16,             // color depth
        false,          // grayscale
        false,          // pixels in a byte share a row. Only valid for depths < 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_GPIO16,    // 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
        );
}

// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.