boards: Add XIAO ESP32C3 board

src/machine/board_xiao-esp32c3.go

@@ -0,0 +1,54 @@
+//go:build xiao_esp32c3
+// +build xiao_esp32c3
+
+// This file contains the pin mappings for the Seeed XIAO ESP32C3 boards.
+//
+// Seeed Studio XIAO ESP32C3 is an IoT mini development board based on
+// the Espressif ESP32-C3 WiFi/Bluetooth dual-mode chip.
+//
+// - https://www.seeedstudio.com/Seeed-XIAO-ESP32C3-p-5431.html
+// - https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/
+
+package machine
+
+// Digital Pins
+const (
+	D0  = GPIO2
+	D1  = GPIO3
+	D2  = GPIO4
+	D3  = GPIO5
+	D4  = GPIO6
+	D5  = GPIO7
+	D6  = GPIO21
+	D7  = GPIO20
+	D8  = GPIO8
+	D9  = GPIO9
+	D10 = GPIO10
+)
+
+// Analog pins
+const (
+	A0 = GPIO2
+	A1 = GPIO3
+	A2 = GPIO4
+	A3 = GPIO5
+)
+
+// UART pins
+const (
+	UART_RX_PIN = GPIO20
+	UART_TX_PIN = GPIO21
+)
+
+// I2C pins
+const (
+	SDA_PIN = GPIO6
+	SCL_PIN = GPIO7
+)
+
+// SPI pins
+const (
+	SPI_SCK_PIN = GPIO8
+	SPI_SDI_PIN = GPIO9
+	SPI_SDO_PIN = GPIO10
+)