targets: Add Shrike Lite board

GNUmakefile

@@ -814,6 +814,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=waveshare-rp2040-tiny examples/echo
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=vicharak_shrike-lite examples/echo
+	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
 	@$(MD5SUM) test.hex

src/machine/board_vicharak_shrike-lite.go

@@ -0,0 +1,118 @@
+//go:build vicharak_shrike_lite
+
+// Pin mappings for Vicharak Shrike-Lite.
+//
+// Reference: https://vicharak-in.github.io/shrike/shrike_pinouts.html
+
+package machine
+
+// Digital
+const (
+	IO0  Pin = GPIO0
+	IO1  Pin = GPIO1
+	IO2  Pin = GPIO2
+	IO3  Pin = GPIO3
+	IO4  Pin = GPIO4
+	IO5  Pin = GPIO5
+	IO6  Pin = GPIO6
+	IO7  Pin = GPIO7
+	IO8  Pin = GPIO8
+	IO9  Pin = GPIO9
+	IO10 Pin = GPIO10
+	IO11 Pin = GPIO11
+	IO12 Pin = GPIO12
+	IO13 Pin = GPIO13
+	IO14 Pin = GPIO14
+	IO15 Pin = GPIO15
+	IO16 Pin = GPIO16
+	IO17 Pin = GPIO17
+	IO18 Pin = GPIO18
+	IO19 Pin = GPIO19
+	IO20 Pin = GPIO20
+	IO21 Pin = GPIO21
+	IO22 Pin = GPIO22
+	IO23 Pin = GPIO23
+	IO24 Pin = GPIO24
+	IO25 Pin = GPIO25
+	IO26 Pin = GPIO26
+	IO27 Pin = GPIO27
+	IO28 Pin = GPIO28
+	IO29 Pin = GPIO29
+)
+
+// FPGA Pins
+const (
+	FPGA_EN  Pin = IO13
+	FPGA_PWR Pin = IO12
+	// SPI_SCLK
+	F3 Pin = IO2
+	// SPI_SS
+	F4 Pin = IO1
+	// SPI_SI (MOSI)
+	F5 Pin = IO3
+	// SPI_SO (MISO) / CONFIG
+	F6  Pin = IO0
+	F18 Pin = IO14
+	F17 Pin = IO15
+)
+
+// Analog pins
+const (
+	A0 Pin = IO26
+	A1 Pin = IO27
+	A2 Pin = IO28
+	A3 Pin = IO29
+)
+
+// LED
+const (
+	LED = IO4
+)
+
+// I2C pins
+const (
+	I2C0_SDA_PIN Pin = IO24
+	I2C0_SCL_PIN Pin = IO25
+
+	I2C1_SDA_PIN Pin = IO6
+	I2C1_SCL_PIN Pin = IO7
+)
+
+// SPI pins
+const (
+	SPI0_SCK_PIN Pin = IO18
+	SPI0_SDO_PIN Pin = IO19
+	SPI0_SDI_PIN Pin = IO20
+
+	SPI1_SCK_PIN Pin = IO10
+	SPI1_SDO_PIN Pin = IO11
+	SPI1_SDI_PIN Pin = IO8
+)
+
+// Onboard crystal oscillator frequency, in MHz.
+const (
+	xoscFreq = 12 // MHz
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = IO28
+	UART0_RX_PIN = IO29
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+	UART1_TX_PIN = IO24
+	UART1_RX_PIN = IO25
+)
+
+var DefaultUART = UART0
+
+// USB CDC identifiers
+const (
+	usb_STRING_PRODUCT      = "Shrike-Lite"
+	usb_STRING_MANUFACTURER = "Vicharak"
+)
+
+var (
+	usb_VID uint16 = 0x2e8a
+	usb_PID uint16 = 0x0003
+)

targets/vicharak_shrike-lite.json

@@ -0,0 +1,14 @@
+{
+    "inherits": [
+        "rp2040"
+    ],
+    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
+    "build-tags": ["vicharak_shrike_lite"],
+    "ldflags": [
+        "--defsym=__flash_size=4M"
+    ],
+    "extra-files": [
+        "targets/pico-boot-stage2.S"
+    ]
+}