adding xteink x4 board

ports/espressif/boards/xteink_x4/board.c

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+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+// SPDX-FileCopyrightText: Copyright (c) 2021 skieast/Bruce Segal
+//
+// 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-bindings/microcontroller/Pin.h"
+#include "shared-module/displayio/__init__.h"
+#include "supervisor/shared/board.h"
+
+#define DELAY 0x80
+
+// SSD1677 controller driving a GDEQ0426T82 4.26" 800x480 E-Ink display.
+
+const uint8_t ssd1677_display_start_sequence[] = {
+    // Software Reset
+    0x12, DELAY, 0x00, 0x14,
+
+    // Temperature Sensor Control (use internal sensor)
+    0x18, 0x00, 0x01, 0x80,
+
+    // Booster Soft Start
+    0x0C, 0x00, 0x05, 0xAE, 0xC7, 0xC3, 0xC0, 0x40,
+
+    // Driver Output Control: 480 gates, GD=0, SM=1, TB=0 = 0x02
+    0x01, 0x00, 0x03, 0xDF, 0x01, 0x02,
+
+    // Data Entry Mode: X increment, Y decrement = 0x01
+    0x11, 0x00, 0x01, 0x01,
+
+    // Border Waveform Control
+    0x3C, 0x00, 0x01, 0x01,
+
+    // Set RAM X Address Start/End: 0 to 799
+    0x44, 0x00, 0x04, 0x00, 0x00, 0x1F, 0x03,
+
+    // Set RAM Y Address Start/End: 479 down to 0
+    0x45, 0x00, 0x04, 0xDF, 0x01, 0x00, 0x00,
+
+    // Set RAM X Counter to 0
+    0x4E, 0x00, 0x02, 0x00, 0x00,
+
+    // Set RAM Y Counter to 479
+    0x4F, 0x00, 0x02, 0xDF, 0x01,
+
+    // Auto Write BW RAM (clear to white)
+    0x46, DELAY, 0x01, 0xF7, 0xFF,
+
+    // Display Update Control 1: bypass RED
+    0x21, 0x00, 0x02, 0x40, 0x00,
+
+    // Display Update Control 2: full refresh with OTP LUT
+    0x22, 0x00, 0x01, 0xF7,
+};
+
+const uint8_t ssd1677_display_stop_sequence[] = {
+    0x22, 0x00, 0x01, 0x83,
+    0x20, 0x00, 0x00,
+    0x10, 0x00, 0x01, 0x01,
+};
+
+const uint8_t ssd1677_display_refresh_sequence[] = {
+    0x20, 0x00, 0x00,
+};
+
+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_GPIO8, &pin_GPIO10, NULL, false);
+    common_hal_busio_spi_never_reset(spi);
+
+    bus->base.type = &fourwire_fourwire_type;
+    common_hal_fourwire_fourwire_construct(bus,
+        spi,
+        MP_OBJ_FROM_PTR(&pin_GPIO4),
+        MP_OBJ_FROM_PTR(&pin_GPIO21),
+        MP_OBJ_FROM_PTR(&pin_GPIO5),
+        40000000,
+        0,
+        0);
+
+    epaperdisplay_epaperdisplay_obj_t *display = &allocate_display()->epaper_display;
+    display->base.type = &epaperdisplay_epaperdisplay_type;
+
+    epaperdisplay_construct_args_t args = EPAPERDISPLAY_CONSTRUCT_ARGS_DEFAULTS;
+    args.bus = bus;
+    args.start_sequence = ssd1677_display_start_sequence;
+    args.start_sequence_len = sizeof(ssd1677_display_start_sequence);
+    args.stop_sequence = ssd1677_display_stop_sequence;
+    args.stop_sequence_len = sizeof(ssd1677_display_stop_sequence);
+    args.width = 800;
+    args.height = 480;
+    args.ram_width = 800;
+    args.ram_height = 480;
+    args.rotation = 0;
+    args.write_black_ram_command = 0x24;
+    args.black_bits_inverted = false;
+    args.refresh_sequence = ssd1677_display_refresh_sequence;
+    args.refresh_sequence_len = sizeof(ssd1677_display_refresh_sequence);
+    args.refresh_time = 1.6;
+    args.busy_pin = &pin_GPIO6;
+    args.busy_state = true;
+    args.seconds_per_frame = 5.0;
+    args.grayscale = false;
+    args.two_byte_sequence_length = true;
+    args.address_little_endian = true;
+    common_hal_epaperdisplay_epaperdisplay_construct(display, &args);
+}
+
+bool espressif_board_reset_pin_number(gpio_num_t pin_number) {
+    return false;
+}
+
+void board_deinit(void) {
+    epaperdisplay_epaperdisplay_obj_t *display = &displays[0].epaper_display;
+    if (display->base.type == &epaperdisplay_epaperdisplay_type) {
+        while (common_hal_epaperdisplay_epaperdisplay_get_busy(display)) {
+            RUN_BACKGROUND_TASKS;
+        }
+    }
+    common_hal_displayio_release_displays();
+}
+
+// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.

ports/espressif/boards/xteink_x4/mpconfigboard.h

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+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+// SPDX-FileCopyrightText: Copyright (c) 2021 skieast/Bruce Segal
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+// Board setup
+#define MICROPY_HW_BOARD_NAME       "Xteink X4"
+#define MICROPY_HW_MCU_NAME         "ESP32-C3"
+
+#define CIRCUITPY_BOARD_SPI         (1)
+#define CIRCUITPY_BOARD_SPI_PIN     {{.clock = &pin_GPIO8, .mosi = &pin_GPIO10, .miso = &pin_GPIO7}}
+
+// For entering safe mode
+#define CIRCUITPY_BOOT_BUTTON       (&pin_GPIO3)

ports/espressif/boards/xteink_x4/mpconfigboard.mk

@@ -0,0 +1,29 @@
+CIRCUITPY_CREATOR_ID =  0x0000303A
+CIRCUITPY_CREATION_ID = 0x00001001
+
+IDF_TARGET = esp32c3
+
+CIRCUITPY_ESP_FLASH_MODE = dio
+CIRCUITPY_ESP_FLASH_FREQ = 40m
+CIRCUITPY_ESP_FLASH_SIZE = 16MB
+
+CIRCUITPY_ESP_USB_SERIAL_JTAG = 1
+
+CIRCUITPY_PARALLELDISPLAYBUS = 0
+CIRCUITPY_RGBMATRIX = 0
+CIRCUITPY_AUDIOBUSIO = 0
+CIRCUITPY_AUDIOCORE = 0
+CIRCUITPY_AUDIOMIXER = 0
+CIRCUITPY_AUDIOMP3 = 0
+CIRCUITPY_CAMERA = 0
+CIRCUITPY_CANIO = 0
+CIRCUITPY_DOTCLOCKFRAMEBUFFER = 0
+CIRCUITPY_KEYPAD = 0
+CIRCUITPY_ROTARYIO = 0
+CIRCUITPY_USB_HID = 0
+CIRCUITPY_USB_MIDI = 0
+CIRCUITPY_ULAB = 0
+CIRCUITPY_PULSEIO = 0
+CIRCUITPY_PWMIO = 0
+CIRCUITPY_RAINBOWIO = 0
+CIRCUITPY_SYNTHIO = 0

ports/espressif/boards/xteink_x4/pins.c

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+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+// SPDX-FileCopyrightText: Copyright (c) 2021 skieast/Bruce Segal
+//
+// SPDX-License-Identifier: MIT
+
+#include "shared-bindings/board/__init__.h"
+
+#include "shared-module/displayio/__init__.h"
+
+static const mp_rom_map_elem_t board_module_globals_table[] = {
+    CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
+
+    { MP_ROM_QSTR(MP_QSTR_BUTTON), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_BOOT0), MP_ROM_PTR(&pin_GPIO3) },
+
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO0) },
+
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON_ADC_1), MP_ROM_PTR(&pin_GPIO1) },
+
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON_ADC_2), MP_ROM_PTR(&pin_GPIO2) },
+
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_D20), MP_ROM_PTR(&pin_GPIO20) },
+
+    { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_EPD_MOSI), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_GPIO10) },
+
+    { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_EPD_SCK), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_GPIO8) },
+
+    { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_SD_MISO), MP_ROM_PTR(&pin_GPIO7) },
+
+    { MP_ROM_QSTR(MP_QSTR_SD_CS), MP_ROM_PTR(&pin_GPIO12) },
+
+    { MP_ROM_QSTR(MP_QSTR_EPD_BUSY), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_EPD_RESET), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_EPD_DC), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_EPD_CS), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+
+    { MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].epaper_display)},
+
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);

ports/espressif/boards/xteink_x4/sdkconfig

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+#
+# Espressif IoT Development Framework Configuration
+#
+#
+# Component config
+#
+#
+# LWIP
+#
+# end of LWIP
+
+# end of Component config
+
+# end of Espressif IoT Development Framework Configuration