Merge e92ca9ec2b into 5114f2c1ea

ports/rp2/boards/WAVESHARE_RP2040_PLUS/README.md

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+# Waveshare RP2040-Plus
+
+The Waveshare RP2040-Plus Board is based on the Raspberry Pi RP2040 and can be
+purchased with 4/16 MiB of flash.
+
+These boards are available from a number of resellers 
+Waveshare maintain the [Wiki:RP2040-Plus](https://www.waveshare.com/wiki/RP2040-Plus)
+Wiki containing information on the board.
+
+## Build notes
+
+Builds can be configured with the `BOARD_VARIANT` parameter. Valid variants
+can be displayed with the `query-variant` target. An example:
+
+```bash
+> cd ports/rp2
+> make BOARD=WAVESHARE_RP2040_PLUS query-variants
+VARIANTS: flash_4mb flash_16mb
+> make BOARD=WAVESHARE_RP2040_PLUS BOARD_VARIANT=flash_16mb submodules all  # Build the 16 MiB variant
+```
+
+`flash_4mb` is the default if `BOARD_VARIANT` is not supplied.

ports/rp2/boards/WAVESHARE_RP2040_PLUS/board.json

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+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [
+        "Breadboard Friendly",
+        "Castellated Pads",
+        "SPI Flash",
+        "USB-C"
+    ],
+    "id": "rp2-waveshare-rp2040-plus",
+    "images": [
+        "rp2040-plus-1_5.jpg"
+    ],
+    "mcu": "rp2040",
+    "product": "RP2040 Plus",
+    "thumbnail": "",
+    "url": "https://www.waveshare.com/rp2040-plus.htm",
+    "variants": {
+        "flash_4mb": "4 MiB Flash",
+        "flash_16mb": "16 MiB Flash"
+    },
+    "vendor": "Waveshare"
+}

ports/rp2/boards/WAVESHARE_RP2040_PLUS/mpconfigboard.cmake

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+# CMake file for Waveshare RP2040-Plus boards
+
+# Provide different variants for the downloads page
+set(BOARD_VARIANTS "flash_4mb flash_16mb")
+
+# Select the 4MB variant as the default
+set(PICO_BOARD "waveshare_rp2040_plus_4mb")
+
+if("${BOARD_VARIANT}" STREQUAL "flash_16mb")
+set(PICO_BOARD "waveshare_rp2040_plus_16mb")
+endif()

ports/rp2/boards/WAVESHARE_RP2040_PLUS/mpconfigboard.h

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+#define MICROPY_HW_BOARD_NAME "Waveshare RP2040-Plus"
+
+// Allow 1MB for the firmware image itself, allocate the remainder to the filesystem
+#define MICROPY_HW_FLASH_STORAGE_BYTES (PICO_FLASH_SIZE_BYTES - (640 * 1024))