rp2/boards/PICO_W: Add new Pico W board, an RP2040 with WiFi.

Work done in collaboration with Graham Sanderson and Peter Harper.

Signed-off-by: Damien George <damien@micropython.org>

ports/rp2/boards/PICO_W/board.json

@@ -0,0 +1,21 @@
+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [
+        "Breadboard friendly",
+        "Castellated Pads",
+        "Micro USB",
+        "WiFi"
+    ],
+    "id": "rp2-pico-w",
+    "images": [
+        "rp2-pico-w.jpg"
+    ],
+    "mcu": "rp2040",
+    "product": "Pico W",
+    "thumbnail": "",
+    "url": "https://www.raspberrypi.com/products/raspberry-pi-pico/",
+    "vendor": "Raspberry Pi"
+}

ports/rp2/boards/PICO_W/manifest.py

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+include("../manifest.py")
+
+freeze("$(MPY_DIR)/tools", "upip.py")
+freeze("$(MPY_DIR)/tools", "upip_utarfile.py")
+
+if os.path.isdir(convert_path("$(MPY_LIB_DIR)")):
+    freeze("$(MPY_LIB_DIR)/python-ecosys/urequests", "urequests.py")

ports/rp2/boards/PICO_W/mpconfigboard.cmake

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+# cmake file for Raspberry Pi Pico W
+set(MICROPY_BOARD PICO_W)
+
+set(MICROPY_PY_LWIP ON)
+set(MICROPY_PY_NETWORK_CYW43 ON)
+
+# Board specific version of the frozen manifest
+set(MICROPY_FROZEN_MANIFEST ${CMAKE_SOURCE_DIR}/boards/PICO_W/manifest.py)

ports/rp2/boards/PICO_W/mpconfigboard.h

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+// Board and hardware specific configuration
+#define MICROPY_HW_BOARD_NAME                   "Raspberry Pi Pico W"
+
+// todo: We need something to check our binary size
+#define MICROPY_HW_FLASH_STORAGE_BYTES          (848 * 1024)
+
+#define MICROPY_PY_NETWORK 1
+#define MICROPY_PY_USOCKET 1
+#define MICROPY_PY_USSL 1
+
+// CYW43 driver configuration.
+#define CYW43_USE_SPI (1)
+#define CYW43_LWIP (1)
+#define CYW43_GPIO (1)
+#define CYW43_SPI_PIO (1)
+
+// For debugging mbedtls - also set
+// Debug level (0-4) 1=warning, 2=info, 3=debug, 4=verbose
+// #define MODUSSL_MBEDTLS_DEBUG_LEVEL 1
+
+#define MICROPY_HW_PIN_CYW43_COUNT CYW43_WL_GPIO_COUNT
+#ifdef CYW43_WL_GPIO_LED_PIN
+#define MICROPY_HW_PIN_CYW43_LED_PIN_NUM CYW43_WL_GPIO_LED_PIN
+#endif
+
+#define MICROPY_HW_PIN_RESERVED(i) ((i) == CYW43_PIN_WL_HOST_WAKE || (i) == CYW43_PIN_WL_REG_ON)