circuitpython/ports/atmel-samd/boards/pewpew_m4/board.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries, 2020 Radomir
 * Dopieralski
 *
 * 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 "boards/board.h"
#include "mpconfigboard.h"
#include "hal/include/hal_gpio.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/displayio/FourWire.h"
#include "shared-module/displayio/__init__.h"
#include "shared-module/displayio/mipi_constants.h"

displayio_fourwire_obj_t board_display_obj;

typedef struct {
    const uint32_t *config_data;
    void *handoverHID;
    void *handoverMSC;
    const char *info_uf2;
} UF2_BInfo;

#define APP_START_ADDRESS 0x00004000
#define UF2_BINFO ((UF2_BInfo *)(APP_START_ADDRESS - sizeof(UF2_BInfo)))

#define CFG_DISPLAY_CFG0 39
#define CFG_MAGIC0 0x1e9e10f1

#define DELAY 0x80

uint32_t lookupCfg(uint32_t key, uint32_t defl) {
    const uint32_t *ptr = UF2_BINFO->config_data;
    if (!ptr || (((uint32_t)ptr) & 3) || *ptr != CFG_MAGIC0) {
        // no config data!
    } else {
        ptr += 4;
        while (*ptr) {
            if (*ptr == key)
                return ptr[1];
            ptr += 2;
        }
    }
    return defl;
}

uint8_t display_init_sequence[] = {
    0x01, 0 | DELAY, 150, // SWRESET
    0x11, 0 | DELAY, 255, // SLPOUT
    0xb1, 3, 0x01, 0x2C, 0x2D, // _FRMCTR1
    0xb2, 3, 0x01, 0x2C, 0x2D, //
    0xb3, 6, 0x01, 0x2C, 0x2D, 0x01, 0x2C, 0x2D,
    0xb4, 1, 0x07, // _INVCTR line inversion
    0xc0, 3, 0xa2, 0x02, 0x84, // _PWCTR1 GVDD = 4.7V, 1.0uA
    0xc1, 1, 0xc5, // _PWCTR2 VGH=14.7V, VGL=-7.35V
    0xc2, 2, 0x0a, 0x00, // _PWCTR3 Opamp current small, Boost frequency
    0xc3, 2, 0x8a, 0x2a,
    0xc4, 2, 0x8a, 0xee,
    0xc5, 1, 0x0e, // _VMCTR1 VCOMH = 4V, VOML = -1.1V
    0x2a, 0, // _INVOFF
    0x36, 1, 0xa0, // _MADCTL
    // 1 clk cycle nonoverlap, 2 cycle gate rise, 3 cycle osc equalie,
    // fix on VTL
    0x3a, 1, 0x05, // COLMOD - 16bit color
    0xe0, 16, 0x02, 0x1c, 0x07, 0x12, // _GMCTRP1 Gamma
              0x37, 0x32, 0x29, 0x2d,
              0x29, 0x25, 0x2B, 0x39,
              0x00, 0x01, 0x03, 0x10,
    0xe1, 16, 0x03, 0x1d, 0x07, 0x06, // _GMCTRN1
              0x2E, 0x2C, 0x29, 0x2D,
              0x2E, 0x2E, 0x37, 0x3F,
              0x00, 0x00, 0x02, 0x10,
    0x13, 0 | DELAY, 10, // _NORON
    0x29, 0 | DELAY, 100, // _DISPON
};

void board_init(void) {
    busio_spi_obj_t* spi = &displays[0].fourwire_bus.inline_bus;
    common_hal_busio_spi_construct(spi, &pin_PA13, &pin_PA15, NULL);
    common_hal_busio_spi_never_reset(spi);

    displayio_fourwire_obj_t* bus = &displays[0].fourwire_bus;
    bus->base.type = &displayio_fourwire_type;
    common_hal_displayio_fourwire_construct(bus,
        spi,
        &pin_PA16, // TFT_DC Command or data
        &pin_PA11, // TFT_CS Chip select
        &pin_PA17, // TFT_RST Reset
        60000000, // Baudrate
        0, // Polarity
        0); // Phase

    uint32_t cfg0 = lookupCfg(CFG_DISPLAY_CFG0, 0x000000);
    uint32_t offX = (cfg0 >> 8) & 0xff;
    uint32_t offY = (cfg0 >> 16) & 0xff;
    displayio_display_obj_t* display = &displays[0].display;
    display->base.type = &displayio_display_type;
    common_hal_displayio_display_construct(display,
        bus,
        160, // Width (after rotation)
        128, // Height (after rotation)
        offX, // column start
        offY, // row start
        0, // rotation
        16, // Color depth
        false, // grayscale
        false, // pixels in byte share 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
        0x37, // set vertical scroll command
        display_init_sequence,
        sizeof(display_init_sequence),
        NULL,  // backlight pin
        NO_BRIGHTNESS_COMMAND,
        1.0f, // brightness (ignored)
        true, // auto_brightness
        false, // single_byte_bounds
        false, // data_as_commands
        false, // auto_refresh
        20, // native_frames_per_second
        true); // backlight_on_high
}

bool board_requests_safe_mode(void) {
    return false;
}

void reset_board(void) {
}