rp2/boards/WAVESHARE_RP2350B_CORE: Add Waveshare RP2350B Core board.

Signed-off-by: Ned Konz <ned@metamagix.tech>

ports/rp2/boards/WAVESHARE_RP2350B_CORE/board.json

@@ -0,0 +1,23 @@
+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [
+        "Dual-core",
+        "External Flash",
+        "External RAM",
+        "USB-C"
+    ],
+    "images": [
+        "waveshare_rp2350b_core.png"
+    ],
+    "mcu": "rp2350",
+    "product": "RP2350B Core",
+    "thumbnail": "",
+    "url": "https://www.waveshare.com/core2350b.htm",
+    "variants": {
+        "RISCV": "RISC V"
+    },
+    "vendor": "Waveshare"
+}

ports/rp2/boards/WAVESHARE_RP2350B_CORE/mpconfigboard.cmake

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+# CMake file for Waveshare RP2350B Core
+
+# The Core is powered by an RP2350B with 48 GPIOs
+set(PICO_NUM_GPIOS 48)
+
+# The Waveshare boards don't have official pico-sdk support.
+# So, add this board directory to the header search path and define PICO_BOARD
+# which will instruct pico-sdk to look for waveshare_rp2350b_core.h
+list(APPEND PICO_BOARD_HEADER_DIRS ${MICROPY_BOARD_DIR})
+set(PICO_BOARD "waveshare_rp2350b_core")

ports/rp2/boards/WAVESHARE_RP2350B_CORE/mpconfigboard.h

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+// Board and hardware specific configuration
+#define MICROPY_HW_BOARD_NAME "Waveshare RP2350B Core"
+#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
+#define MICROPY_HW_FLASH_STORAGE_BYTES (14 * 1024 * 1024)
+
+#define MICROPY_HW_PSRAM_CS_PIN (47)
+#define MICROPY_HW_ENABLE_PSRAM (1)
+
+// Override machine_uart.c definitions.
+// See waveshare_rp2350b.h and note that the PICO_DEFAULT_UART configuration
+// is not currently referenced in machine_uart.c.
+#define MICROPY_HW_UART0_TX     (0)
+#define MICROPY_HW_UART0_RX     (1)
+#define MICROPY_HW_UART0_CTS    (-1)
+#define MICROPY_HW_UART0_RTS    (-1)

ports/rp2/boards/WAVESHARE_RP2350B_CORE/mpconfigvariant.cmake

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+# Set the ARM-based RP2350 platform
+set(PICO_PLATFORM "rp2350")

ports/rp2/boards/WAVESHARE_RP2350B_CORE/mpconfigvariant_RISCV.cmake

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+# Set the RISC-V-based RP2350 platform
+set(PICO_PLATFORM "rp2350-riscv")

ports/rp2/boards/WAVESHARE_RP2350B_CORE/pins.csv

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+LED,GPIO39

ports/rp2/boards/WAVESHARE_RP2350B_CORE/waveshare_rp2350b_core.h

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+#ifndef _BOARDS_WAVESHARE_RP2350B_CORE_COMMON_H
+#define _BOARDS_WAVESHARE_RP2350B_CORE_COMMON_H
+
+// --- LED ---
+#ifndef PICO_DEFAULT_LED_PIN
+#define PICO_DEFAULT_LED_PIN 39
+#endif
+
+// Note: Avoid using Pin 47 for any default peripheral since it can be used for
+// extra PSRAM/flash
+// NOTE that the PICO_DEFAULT_UART configuration
+// is not currently referenced in machine_uart.c.
+
+// --- UART ---
+#ifndef PICO_DEFAULT_UART
+#define PICO_DEFAULT_UART 0
+#endif
+#ifndef PICO_DEFAULT_UART_TX_PIN
+#define PICO_DEFAULT_UART_TX_PIN 0
+#endif
+#ifndef PICO_DEFAULT_UART_RX_PIN
+#define PICO_DEFAULT_UART_RX_PIN 1
+#endif
+
+// --- I2C ---
+#ifndef PICO_DEFAULT_I2C
+#define PICO_DEFAULT_I2C 0
+#endif
+#ifndef PICO_DEFAULT_I2C_SDA_PIN
+#define PICO_DEFAULT_I2C_SDA_PIN 8
+#endif
+#ifndef PICO_DEFAULT_I2C_SCL_PIN
+#define PICO_DEFAULT_I2C_SCL_PIN 9
+#endif
+
+// --- SPI ---
+#ifndef PICO_DEFAULT_SPI
+#define PICO_DEFAULT_SPI 0
+#endif
+#ifndef PICO_DEFAULT_SPI_SCK_PIN
+#define PICO_DEFAULT_SPI_SCK_PIN 18
+#endif
+#ifndef PICO_DEFAULT_SPI_TX_PIN
+#define PICO_DEFAULT_SPI_TX_PIN 19
+#endif
+#ifndef PICO_DEFAULT_SPI_RX_PIN
+#define PICO_DEFAULT_SPI_RX_PIN 16
+#endif
+#ifndef PICO_DEFAULT_SPI_CSN_PIN
+#define PICO_DEFAULT_SPI_CSN_PIN 17
+#endif
+
+// Flash configuration
+#define PICO_BOOT_STAGE2_CHOOSE_W25Q080 1
+
+#ifndef PICO_FLASH_SPI_CLKDIV
+#define PICO_FLASH_SPI_CLKDIV 2
+#endif
+
+#endif