esp32/boards/LOLIN_S2_PICO: Add LOLIN_S2_PICO board definition files.

ports/esp32/boards/LOLIN_S2_PICO/board.json

@@ -0,0 +1,18 @@
+{
+    "deploy": [
+        "../deploy_s2.md"
+    ],
+    "docs": "",
+    "features": [
+        "WiFi",
+        "USB-C"
+    ],
+    "images": [
+        "lolin_s2_pico.jpg"
+    ],
+    "mcu": "esp32s2",
+    "product": "S2 pico",
+    "thumbnail": "",
+    "url": "https://www.wemos.cc/en/latest/s2/s2_pico.html",
+    "vendor": "Wemos"
+}

ports/esp32/boards/LOLIN_S2_PICO/manifest.py

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+include("$(PORT_DIR)/boards/manifest.py")
+freeze("./modules")
+
+freeze("$(MPY_DIR)/drivers/display", "ssd1306.py")

ports/esp32/boards/LOLIN_S2_PICO/modules/s2pico.py

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+# LOLIN S2 PICO MicroPython Helper Library
+
+from micropython import const
+from machine import Pin, I2C, Signal
+from s2pico_oled import OLED
+
+# Pin Assignments
+
+# SPI
+SPI_MOSI = const(35)
+SPI_MISO = const(36)
+SPI_CLK = const(37)
+
+# I2C
+I2C_SDA = const(8)
+I2C_SCL = const(9)
+
+# DAC
+DAC1 = const(17)
+DAC2 = const(18)
+
+# LED
+LED = const(10)
+
+# OLED
+OLED_RST = const(18)
+
+# BUTTON
+BUTTON = const(0)
+
+# Helper methods for built in sensors
+
+led = Signal(LED, Pin.OUT, value=0, invert=True)
+
+button = Pin(BUTTON, Pin.IN, Pin.PULL_UP)
+
+i2c = I2C(0)
+oled = OLED(i2c, Pin(OLED_RST))

ports/esp32/boards/LOLIN_S2_PICO/modules/s2pico_oled.py

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+from time import sleep_ms
+from ssd1306 import SSD1306_I2C
+import network
+
+
+class OLED(SSD1306_I2C):
+    def __init__(self, i2c, reset):
+        reset.init(reset.OUT, value=1)
+        self._reset = reset
+        self.reset(False)
+        super().__init__(128, 32, i2c)
+
+    def reset(self, reinit=True):
+        self._reset(1)
+        sleep_ms(1)
+        self._reset(0)
+        sleep_ms(10)
+        self._reset(1)
+        if reinit:
+            self.init_display()
+
+    def test(self):
+        self.fill(0)
+        self.fill_rect(0, 0, 32, 32, 1)
+        self.fill_rect(2, 2, 28, 28, 0)
+        self.vline(9, 8, 22, 1)
+        self.vline(16, 2, 22, 1)
+        self.vline(23, 8, 22, 1)
+        self.fill_rect(26, 24, 2, 4, 1)
+        self.text("MicroPython", 40, 0, 1)
+        self.text("SSD1306", 40, 12, 1)
+        self.text("OLED 128x32", 40, 24, 1)
+        self.show()
+
+    def display_wifi(self):
+        self.fill(0)
+        self.text("Scan...", 0, 0, 1)
+        self.show()
+
+        sta_if = network.WLAN(network.STA_IF)
+        sta_if.active(True)
+        _wifi = sta_if.scan()
+
+        self.fill(0)
+        self.text(str(len(_wifi)) + " Networks", 0, 0, 1)
+        self.text(str(_wifi[0][3]) + " " + (_wifi[0][0]).decode("utf-8"), 0, 12, 1)
+        self.text(str(_wifi[1][3]) + " " + (_wifi[1][0]).decode("utf-8"), 0, 24, 1)
+        self.show()

ports/esp32/boards/LOLIN_S2_PICO/mpconfigboard.cmake

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+set(IDF_TARGET esp32s2)
+
+set(SDKCONFIG_DEFAULTS
+    boards/sdkconfig.base
+    boards/sdkconfig.spiram_sx
+    boards/sdkconfig.usb
+)
+
+if(NOT MICROPY_FROZEN_MANIFEST)
+    set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/manifest.py)
+endif()

ports/esp32/boards/LOLIN_S2_PICO/mpconfigboard.h

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+#define MICROPY_HW_BOARD_NAME    "LOLIN_S2_PICO"
+#define MICROPY_HW_MCU_NAME      "ESP32-S2FN4R2"
+
+#define MICROPY_PY_BLUETOOTH     (0)
+#define MICROPY_HW_ENABLE_SDCARD (0)
+
+#define MICROPY_HW_I2C0_SCL      (9)
+#define MICROPY_HW_I2C0_SDA      (8)
+
+#define MICROPY_HW_SPI1_MOSI     (35)
+#define MICROPY_HW_SPI1_MISO     (36)
+#define MICROPY_HW_SPI1_SCK      (37)

ports/esp32/boards/LOLIN_S2_PICO/sdkconfig.board

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+CONFIG_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHFREQ_80M=y
+CONFIG_USB_AND_UART=y
+# LWIP
+CONFIG_LWIP_LOCAL_HOSTNAME="LOLIN_S2_PICO"
+# end of LWIP