Adds target for Piromoni Badger 2350

src/machine/board_badger2350.go

@@ -0,0 +1,114 @@
+//go:build badger2350
+
+// Pin mapping verified against pimoroni/badger2350 board/pins.csv.
+// Chip: RP2350A (QFN-60, 30 GPIO) -> target inherits from "rp2350".
+// Pin source: https://github.com/pimoroni/badger2350/blob/main/board/pins.csv
+//
+// NOTES (verify before first flash):
+//   - POWER_EN (GPIO27) likely switches peripheral/display 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.
+
+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
+
+	// System / RTC-related buttons.
+	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
+
+	// Convention: first zone as default LED.
+	LED = CL0
+)
+
+// E-ink display (Inky), on SPI0.
+const (
+	INKY_BUSY Pin = GPIO16
+	INKY_CS   Pin = GPIO17
+	INKY_SCLK Pin = GPIO18
+	INKY_MOSI Pin = GPIO19
+	INKY_DC   Pin = GPIO20
+	INKY_RES  Pin = GPIO21
+)
+
+// SPI0 default pins == Inky bus. SDI is unused by the EPD,
+// but GPIO16 is a valid SPI0 RX line on the RP2350.
+const (
+	SPI0_SCK_PIN = GPIO18 // INKY_SCLK
+	SPI0_SDO_PIN = GPIO19 // INKY_MOSI
+	SPI0_SDI_PIN = GPIO16 // (unused by the EPD)
+)
+
+// SPI1 is not routed to any header; NoPin satisfies the machine package.
+const (
+	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
+)
+
+// I2C0 (Qwiic/STEMMA QT + RTC PCF85063A).
+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
+)
+
+// 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      = "Badger 2350"
+	usb_STRING_MANUFACTURER = "Pimoroni"
+)
+
+var (
+	usb_VID uint16 = 0x2E8A
+	usb_PID uint16 = 0x0005
+)

targets/badger2350.json

@@ -0,0 +1,9 @@
+{
+    "inherits": ["rp2350"],
+    "build-tags": ["badger2350"],
+    "serial-port": ["2e8a:0005"],
+    "default-stack-size": 8192,
+    "ldflags": [
+        "--defsym=__flash_size=16M"
+    ]
+}