From c7692623986b55266b1d96dfb8008dc11b6d83d4 Mon Sep 17 00:00:00 2001
From: Michael Smith <2015782+mikesmitty@users.noreply.github.com>
Date: Sun, 10 Aug 2025 03:32:16 -0400
Subject: [PATCH] feat: add metro-rp2350 board definition (#4989)

* feat: add metro-rp2350 board definition
* chore: add smoke test
---
 GNUmakefile                       |   2 +
 src/machine/board_metro_rp2350.go | 183 ++++++++++++++++++++++++++++++
 targets/metro-rp2350.json         |  11 ++
 3 files changed, 196 insertions(+)
 create mode 100644 src/machine/board_metro_rp2350.go
 create mode 100644 targets/metro-rp2350.json

diff --git a/GNUmakefile b/GNUmakefile
index 61174600e..99dc3913b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -785,6 +785,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pico-plus2          examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=metro-rp2350        examples/blinky1
+	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=waveshare-rp2040-tiny examples/echo
 	@$(MD5SUM) test.hex
 	# test pwm
diff --git a/src/machine/board_metro_rp2350.go b/src/machine/board_metro_rp2350.go
new file mode 100644
index 000000000..3bffe30d6
--- /dev/null
+++ b/src/machine/board_metro_rp2350.go
@@ -0,0 +1,183 @@
+//go:build metro_rp2350
+
+package machine
+
+// GPIO pins
+const (
+	GP0  Pin = GPIO0
+	GP1  Pin = GPIO1
+	GP2  Pin = GPIO2
+	GP3  Pin = GPIO3
+	GP4  Pin = GPIO4
+	GP5  Pin = GPIO5
+	GP6  Pin = GPIO6
+	GP7  Pin = GPIO7
+	GP8  Pin = GPIO8
+	GP9  Pin = GPIO9
+	GP10 Pin = GPIO10
+	GP11 Pin = GPIO11
+	GP12 Pin = GPIO12
+	GP13 Pin = GPIO13
+	GP14 Pin = GPIO14
+	GP15 Pin = GPIO15
+	GP16 Pin = GPIO16
+	GP17 Pin = GPIO17
+	GP18 Pin = GPIO18
+	GP19 Pin = GPIO19
+	GP20 Pin = GPIO20
+	GP21 Pin = GPIO21
+	GP22 Pin = GPIO22
+	GP23 Pin = GPIO23
+	GP24 Pin = GPIO24
+	GP25 Pin = GPIO25
+	GP26 Pin = GPIO26
+	GP27 Pin = GPIO27
+	GP28 Pin = GPIO28
+	GP29 Pin = GPIO29
+	GP30 Pin = GPIO30
+	GP31 Pin = GPIO31
+	GP32 Pin = GPIO32
+	GP33 Pin = GPIO33
+	GP34 Pin = GPIO34
+	GP35 Pin = GPIO35
+	GP36 Pin = GPIO36
+	GP37 Pin = GPIO37
+	GP38 Pin = GPIO38
+	GP39 Pin = GPIO39
+	GP40 Pin = GPIO40
+	GP41 Pin = GPIO41
+	GP42 Pin = GPIO42
+	GP43 Pin = GPIO43
+	GP44 Pin = GPIO44
+	GP45 Pin = GPIO45
+	GP46 Pin = GPIO46
+
+	// Boot button
+	BUTTON Pin = GPIO24
+
+	// Onboard LED
+	LED Pin = GPIO23
+
+	// Onboard NeoPixel
+	NEOPIXEL Pin = GPIO25
+	WS2812   Pin = GPIO25
+
+	// Onboard crystal oscillator frequency, in MHz.
+	xoscFreq = 12 // MHz
+)
+
+// Arduino-header digital pins
+const (
+	RX  Pin = GPIO1
+	TX  Pin = GPIO0
+	D2  Pin = GPIO2
+	D3  Pin = GPIO3
+	D4  Pin = GPIO4
+	D5  Pin = GPIO5
+	D6  Pin = GPIO6
+	D7  Pin = GPIO7
+	D8  Pin = GPIO8
+	D9  Pin = GPIO9
+	D10 Pin = GPIO10
+	D11 Pin = GPIO11
+	D22 Pin = GPIO22
+	D23 Pin = GPIO23
+)
+
+// Arduino-header analog pins
+const (
+	A0 Pin = GPIO41
+	A1 Pin = GPIO42
+	A2 Pin = GPIO43
+	A3 Pin = GPIO44
+	A4 Pin = GPIO45
+	A5 Pin = GPIO46
+)
+
+// I2C Default pins on Raspberry Pico.
+const (
+	I2C0_SDA_PIN = GP20
+	I2C0_SCL_PIN = GP21
+
+	I2C1_SDA_PIN = GP2
+	I2C1_SCL_PIN = GP3
+)
+
+// SPI default pins
+const (
+	// Default Serial Clock Bus 0 for SPI communications
+	SPI0_SCK_PIN = GPIO18
+	// Default Serial Out Bus 0 for SPI communications
+	SPI0_SDO_PIN = GPIO19 // Tx
+	// Default Serial In Bus 0 for SPI communications
+	SPI0_SDI_PIN = GPIO16 // Rx
+
+	// Default Serial Clock Bus 1 for SPI communications
+	SPI1_SCK_PIN = GPIO30
+	// Default Serial Out Bus 1 for SPI communications
+	SPI1_SDO_PIN = GPIO31 // Tx
+	// Default Serial In Bus 1 for SPI communications
+	SPI1_SDI_PIN = GPIO28 // Rx
+
+	// SPI header pins
+	MOSI Pin = SPI1_SDO_PIN
+	MISO Pin = SPI1_SDI_PIN
+	SCK  Pin = SPI1_SCK_PIN
+)
+
+// SD card reader pins
+const (
+	SD_SCK         = GPIO34
+	SD_MOSI        = GPIO35
+	SD_MISO        = GPIO36
+	SDIO_DATA1     = GPIO37
+	SDIO_DATA2     = GPIO38
+	SD_CS          = GPIO39
+	SD_CARD_DETECT = GPIO40
+)
+
+// HSTX pins
+const (
+	CKN Pin = GPIO15
+	CKP Pin = GPIO14
+	D0N Pin = GPIO19
+	D0P Pin = GPIO18
+	D1N Pin = GPIO17
+	D1P Pin = GPIO16
+	D2N Pin = GPIO13
+	D2P Pin = GPIO12
+	D26 Pin = GPIO26
+	D27 Pin = GPIO27
+	SCL Pin = GPIO21
+	SDA Pin = GPIO20
+)
+
+// USB host header pins
+const (
+	USB_HOST_DATA_PLUS  Pin = GPIO32
+	USB_HOST_DATA_MINUS Pin = GPIO33
+	USB_HOST_5V_POWER   Pin = GPIO29
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = GPIO0
+	UART0_RX_PIN = GPIO1
+	UART1_TX_PIN = GPIO8
+	UART1_RX_PIN = GPIO9
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+var DefaultUART = UART0
+
+// USB identifiers
+const (
+	usb_STRING_PRODUCT      = "Metro RP2350"
+	usb_STRING_MANUFACTURER = "Adafruit"
+)
+
+var (
+	usb_VID uint16 = 0x239A
+	usb_PID uint16 = 0x814E
+)
diff --git a/targets/metro-rp2350.json b/targets/metro-rp2350.json
new file mode 100644
index 000000000..8a13ab245
--- /dev/null
+++ b/targets/metro-rp2350.json
@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2350b"
+    ],
+    "build-tags": ["metro_rp2350"],
+    "serial-port": ["239a:814e"],
+    "default-stack-size": 8192,
+    "ldflags": [
+        "--defsym=__flash_size=16M"
+    ]
+}