Added Gopher Badge support

Makefile

@@ -638,6 +638,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=trinkey-qt2040      examples/temp
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=gopher-badge      examples/blinky1
+	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
 	@$(MD5SUM) test.hex

src/machine/board_gopher-badge.go

@@ -0,0 +1,108 @@
+//go:build gopher_badge
+
+// This contains the pin mappings for the Gopher Badge.
+//
+// For more information, see: https://gopherbadge.com/
+package machine
+
+import (
+	"device/rp"
+	"runtime/interrupt"
+)
+
+const (
+	/*ADC0 Pin = GPIO26
+	ADC1 Pin = GPIO27
+	ADC2 Pin = GPIO28
+	GPIO4 Pin = GPIO4
+	GPIO5 Pin = GPIO5
+	GPIO6 Pin = GPIO6
+	GPIO7 Pin = GPIO7
+	GPIO8 Pin = GPIO8
+	GPIO9 Pin = GPIO9*/
+
+	PENIRQ Pin = GPIO13
+
+	LED       Pin = GPIO2
+	NEOPIXELS Pin = GPIO15
+	WS2812    Pin = GPIO15
+
+	BUTTON_A     Pin = GPIO10
+	BUTTON_B     Pin = GPIO11
+	BUTTON_LEFT  Pin = GPIO25
+	BUTTON_UP    Pin = GPIO24
+	BUTTON_RIGHT Pin = GPIO22
+	BUTTON_DOWN  Pin = GPIO23
+
+	TFT_RST       Pin = GPIO21
+	TFT_SDI       Pin = GPIO19
+	TFT_SDO       Pin = GPIO16
+	TFT_CS        Pin = GPIO17
+	TFT_SCL       Pin = GPIO18
+	TFT_WRX       Pin = GPIO20
+	TFT_BACKLIGHT Pin = GPIO12
+
+	SPEAKER        Pin = GPIO14
+	SPEAKER_ENABLE Pin = GPIO3
+)
+
+// I2C pins
+const (
+	I2C0_SDA_PIN Pin = GPIO0
+	I2C0_SCL_PIN Pin = GPIO1
+
+	I2C1_SDA_PIN Pin = NoPin
+	I2C1_SCL_PIN Pin = NoPin
+)
+
+// SPI pins.
+const (
+	SPI0_SCK_PIN Pin = GPIO18
+	SPI0_SDO_PIN Pin = GPIO19
+	SPI0_SDI_PIN Pin = GPIO16
+
+	SPI1_SCK_PIN Pin = NoPin
+	SPI1_SDO_PIN Pin = NoPin
+	SPI1_SDI_PIN Pin = NoPin
+)
+
+// Onboard crystal oscillator frequency, in MHz.
+const (
+	xoscFreq = 12 // MHz
+)
+
+// USB CDC identifiers
+const (
+	usb_STRING_PRODUCT      = "Gopher Badger"
+	usb_STRING_MANUFACTURER = "TinyGo"
+)
+
+var (
+	usb_VID uint16 = 0x2e8a
+	usb_PID uint16 = 0x0003
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = GPIO0
+	UART0_RX_PIN = GPIO1
+	UART1_TX_PIN = GPIO4
+	UART1_RX_PIN = GPIO5
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+// UART on the RP2040
+var (
+	UART1  = &_UART1
+	_UART1 = UART{
+		Buffer: NewRingBuffer(),
+		Bus:    rp.UART1,
+	}
+)
+
+var DefaultUART = UART1
+
+func init() {
+	UART1.Interrupt = interrupt.New(rp.IRQ_UART1_IRQ, _UART1.handleInterrupt)
+}

targets/gopher-badge.json

@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2040"
+    ],
+    "serial-port": ["2e8a:0003"],
+    "build-tags": ["gopher_badge"],
+    "linkerscript": "targets/gopher-badge.ld",
+    "extra-files": [
+        "targets/pico-boot-stage2.S"
+    ]
+}

targets/gopher-badge.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    /* Reserve exactly 256 bytes at start of flash for second stage bootloader */
+    BOOT2_TEXT (rx) : ORIGIN = 0x10000000, LENGTH = 256
+    FLASH_TEXT (rx) : ORIGIN = 0x10000000 + 256, LENGTH = 1020K - 256
+    RAM (rwx)       : ORIGIN = 0x20000000, LENGTH = 256k
+}
+
+INCLUDE "targets/rp2040.ld"