copy from @erongd

https://github.com/erongd/circuitpython/blob/lilygo_t_display_rp2040/ports/raspberrypi/boards/lilygo_t_display_rp2040/board.c

Author: kreier

ports/raspberrypi/boards/lilygo_t_display_rp2040/board.c

@@ -0,0 +1,153 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 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/microcontroller/Pin.h"
+#include "shared-module/displayio/__init__.h"
+#include "shared-module/displayio/mipi_constants.h"
+
+displayio_fourwire_obj_t board_display_obj;
+
+#define DELAY 0x80
+#define LCD_POWER 22
+
+// display init sequence according to LilyGO example app
+uint8_t display_init_sequence[] = {
+    // sw reset
+    0x01, 0 | DELAY, 150,
+    // sleep out
+    0x11, 0 | DELAY, 255,
+    // normal display mode on
+    0x13, 0,
+    // display and color format settings
+    0x36, 1, 0x08,
+    0xB6, 2, 0x0A, 0x82,
+    0x3A, 1 | DELAY,  0x55, 10,
+    // 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, 255,
+};
+
+static void display_init(void) {
+    busio_spi_obj_t *spi = &displays[0].fourwire_bus.inline_bus;
+
+    common_hal_busio_spi_construct(
+        spi,
+        &pin_GPIO2,     // CLK
+        &pin_GPIO3,     // MOSI
+        NULL,           // MISO not connected
+        false);         // Not half-duplex
+
+    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_GPIO1,     // DC
+        &pin_GPIO5,     // CS
+        NULL,           // RST (Reset pin tie to 0, do not set here)
+        40000000,       // baudrate
+        1,              // polarity
+        0               // phase
+        );
+
+    displayio_display_obj_t *display = &displays[0].display;
+    display->base.type = &displayio_display_type;
+
+    common_hal_displayio_display_construct(
+        display,
+        bus,
+        240,            // width (after rotation)
+        135,            // height (after rotation)
+        52,             // column start
+        40,             // row start
+        90,             // 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_GPIO4,     // backlight pin
+        NO_BRIGHTNESS_COMMAND,
+        1.0f,           // brightness (ignored)
+        false,          // auto_brightness
+        false,          // single_byte_bounds
+        false,          // data_as_commands
+        true,           // auto_refresh
+        60,             // native_frames_per_second
+        true,           // backlight_on_high
+        false           // SH1107_addressing
+        );
+
+    common_hal_never_reset_pin(&pin_GPIO4); // backlight pin
+}
+
+void board_init(void) {
+    // Pin 22 has to be pulled high to turn on the LCD
+    const uint PWR_PIN = LCD_POWER;
+    gpio_init(PWR_PIN);
+    gpio_set_dir(PWR_PIN, GPIO_OUT);
+    gpio_put(PWR_PIN, 1);
+    common_hal_never_reset_pin(&pin_GPIO22);
+
+    // Display
+    display_init();
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+void reset_board(void) {
+}
+
+void board_deinit(void) {
+}