circuitpython/ports/espressif/boards/m5stack_dinmeter/board.c at 3de2c639fd9070bf49f09f4f8af0da6148af7817 · juergenpabel/circuitpython · GitHub

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// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
//
// SPDX-License-Identifier: MIT

#include "mpconfigboard.h"
#include "supervisor/board.h"
#include "supervisor/shared/serial.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/fourwire/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"
#include "py/runtime.h"
#include "py/ringbuf.h"
#include "shared/runtime/interrupt_char.h"


uint8_t display_init_sequence[] = {
    0x01, 0x80, 0x96,             // SWRESET and Delay 150ms
    0x11, 0x80, 0xff,             // SLPOUT and Delay
    0xb1, 0x03, 0x01, 0x2C, 0x2D,   // _FRMCTR1
    0xb2, 0x03, 0x01, 0x2C, 0x2D,   // _FRMCTR2
    0xb3, 0x06, 0x01, 0x2C, 0x2D, 0x01, 0x2C, 0x2D, // _FRMCTR3
    0xb4, 0x01, 0x07,             // _INVCTR line inversion
    0xc0, 0x03, 0xa2, 0x02, 0x84,   // _PWCTR1 GVDD = 4.7V, 1.0uA
    0xc1, 0x01, 0xc5,             // _PWCTR2 VGH=14.7V, VGL=-7.35V
    0xc2, 0x02, 0x0a, 0x00,        // _PWCTR3 Opamp current small, Boost frequency
    0xc3, 0x02, 0x8a, 0x2a,
    0xc4, 0x02, 0x8a, 0xee,
    0xc5, 0x01, 0x0e,             // _VMCTR1 VCOMH = 4V, VOML = -1.1V
    0x36, 0x01, 0xc8,             // MADCTL Rotate display
    0x21, 0x00,                  // _INVON
    0x3a, 0x01, 0x05,             // COLMOD - 16bit color
    0xe0, 0x10, 0x02, 0x1c, 0x07, 0x12, 0x37, 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2B, 0x39, 0x00, 0x01, 0x03, 0x10, // _GMCTRP1 Gamma
    0xe1, 0x10, 0x03, 0x1d, 0x07, 0x06, 0x2E, 0x2C, 0x29, 0x2D, 0x2E, 0x2E, 0x37, 0x3F, 0x00, 0x00, 0x02, 0x10, // _GMCTRN1
    0x13, 0x80, 0x0a,             // _NORON
    0x29, 0x80, 0x64              // _DISPON
};


// Overrides the weakly linked function from supervisor/shared/board.c
void board_init(void) {
    busio_spi_obj_t *spi = common_hal_board_create_spi(0);
    fourwire_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
    bus->base.type = &fourwire_fourwire_type;

    // see here for inspiration: https://github.com/m5stack/M5GFX/blob/33d7d3135e816a86a008fae8ab3757938cee95d2/src/M5GFX.cpp#L1350
    common_hal_fourwire_fourwire_construct(
        bus,
        spi,
        &pin_GPIO4,     // DC
        &pin_GPIO7,     // CS
        &pin_GPIO8,     // RST
        40000000,       // 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)
        135,            // height (after rotation)
        40,             // column start
        52,             // 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_GPIO9,    // backlight pin
        NO_BRIGHTNESS_COMMAND,
        1.0f,           // brightness
        false,          // single_byte_bounds
        false,          // data_as_commands
        true,           // auto_refresh
        80,             // native_frames_per_second
        true,           // backlight_on_high
        false,          // SH1107_addressing
        50000           // backlight pwm frequency
        );
}


bool espressif_board_reset_pin_number(gpio_num_t pin_number) {
    // Hold pin must be set high to avoid a power off when battery powered
    if (pin_number == 46) {
        // Turn on hold output
        config_pin_as_output_with_level(pin_number, true);
        return true;
    }
    return false;
}

// TODO: Should we turn off the display when asleep, in board_deinit() ?