Prepares target for Piromoni Blinky 2350

src/machine/board_blinky2350.go

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+//go:build blinky2350
+
+// Pin mapping verified against pimoroni/blinky2350 board/pins.csv.
+// Chip: RP2350A (QFN-60, 30 GPIO) -> target inherits from "rp2350".
+// Pin source: https://github.com/pimoroni/blinky2350/blob/main/board/pins.csv
+//
+// NOTES (verify before first flash):
+//   - POWER_EN (GPIO27) likely switches peripheral power.
+//     Verify polarity against the schematic; pull HIGH early if needed,
+//     otherwise the display will remain blank.
+//   - CHARGE_STAT is connected to EXT_GPIO2 (I2C IO expander) according to pins.csv,
+//     NOT the RP2350 -> intentionally not defined as a pin here.
+//   - The dot matrix is NOT driven via SPI (Latch/Blank/
+//     Row-Clock are not SPI signals) -> use PIO or bit-banging.
+//     SPI0 and SPI1 are therefore set to NoPin (required by the machine package).
+
+package machine
+
+// Crystal oscillator frequency.
+const xoscFreq = 12 // MHz
+
+// User buttons.
+const (
+	BUTTON_A    Pin = GPIO7
+	BUTTON_B    Pin = GPIO9
+	BUTTON_C    Pin = GPIO10
+	BUTTON_UP   Pin = GPIO11
+	BUTTON_DOWN Pin = GPIO6
+	BUTTON_HOME Pin = GPIO22
+	BUTTON_BOOT Pin = BUTTON_HOME
+
+	BUTTON_RESET Pin = GPIO14
+	BUTTON_INT   Pin = GPIO15
+)
+
+// Case LEDs (4-zone mono illumination), named CL0..CL3 in the docs.
+const (
+	CL0 Pin = GPIO0
+	CL1 Pin = GPIO1
+	CL2 Pin = GPIO2
+	CL3 Pin = GPIO3
+
+	LED = CL0
+)
+
+// LED dot matrix: column shift register + row driver.
+// NOT SPI -> drive via PIO or bit-banging.
+const (
+	DISPLAY_COL_SCLK  Pin = GPIO16
+	DISPLAY_COL_DATA  Pin = GPIO17
+	DISPLAY_COL_LATCH Pin = GPIO18
+	DISPLAY_COL_BLANK Pin = GPIO19
+	DISPLAY_ROW_DATA  Pin = GPIO20
+	DISPLAY_ROW_CLK   Pin = GPIO21
+)
+
+// I2C0 (Qwiic/STEMMA QT + RTC).
+const (
+	I2C0_SDA_PIN = GPIO4
+	I2C0_SCL_PIN = GPIO5
+)
+
+// I2C1 is not routed to any header; NoPin satisfies the machine package.
+const (
+	I2C1_SDA_PIN Pin = NoPin
+	I2C1_SCL_PIN Pin = NoPin
+)
+
+// SPI pins - the LED matrix is driven via PIO/bit-banging, not SPI.
+// NoPin satisfies the machine package requirements.
+const (
+	SPI0_SCK_PIN Pin = NoPin
+	SPI0_SDO_PIN Pin = NoPin
+	SPI0_SDI_PIN Pin = NoPin
+
+	SPI1_SCK_PIN Pin = NoPin
+	SPI1_SDO_PIN Pin = NoPin
+	SPI1_SDI_PIN Pin = NoPin
+)
+
+// UART pins - default RP2350 UART0 mapping.
+// Note: GPIO0/GPIO1 are also CL0/CL1 (case LEDs)
+// Do not use UART0 and LEDs simultaneously.
+const (
+	UART0_TX_PIN = GPIO0
+	UART0_RX_PIN = GPIO1
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+// Power / sensing.
+const (
+	VBUS_DETECT Pin = GPIO12
+	RTC_ALARM   Pin = GPIO13
+	VBAT_SENSE  Pin = GPIO26
+	POWER_EN    Pin = GPIO27
+	SENSE_1V1   Pin = GPIO28
+
+	BATTERY = VBAT_SENSE
+)
+
+var DefaultUART = UART0
+
+// USB identifiers
+const (
+	usb_STRING_PRODUCT      = "Blinky 2350"
+	usb_STRING_MANUFACTURER = "Pimoroni"
+)
+
+var (
+	usb_VID uint16 = 0x2E8A
+	usb_PID uint16 = 0x0005
+)

targets/blinky2350.json

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+{
+    "inherits": ["rp2350"],
+    "build-tags": ["blinky2350"],
+    "serial-port": ["2e8a:0005"],
+    "default-stack-size": 8192,
+    "ldflags": [
+        "--defsym=__flash_size=16M"
+    ]
+}