Initial commit with basic project structure and Firebeetle 2 board definition

boards/espressif/esp32c3_devkitc/esp32c3_devkitc.dts

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <espressif/esp32c3/esp32c3_wroom_n4.dtsi>
+#include "esp32c3_devkitc-pinctrl.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+#include <espressif/partitions_0x0_default.dtsi>
+
+/ {
+	model = "Espressif ESP32C3-DevkitC";
+	compatible = "espressif,esp32c3";
+
+	chosen {
+		zephyr,sram = &sram1;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+		zephyr,bt-hci = &esp32_bt_hci;
+	};
+
+	aliases {
+		sw0 = &user_button1;
+		i2c-0 = &i2c0;
+		watchdog0 = &wdt0;
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button1: button_1 {
+			label = "User SW1";
+			gpios = <&gpio0 9 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-names = "default";
+};
+
+&usb_serial {
+	/* requires resoldering of resistors on the board */
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	pinctrl-0 = <&i2c0_default>;
+	pinctrl-names = "default";
+};
+
+&trng0 {
+	status = "okay";
+};
+
+&spi2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	pinctrl-0 = <&spim2_default>;
+	pinctrl-names = "default";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&wdt0 {
+	status = "okay";
+};
+
+&timer0 {
+	status = "disabled";
+};
+
+&timer1 {
+	status = "disabled";
+};
+
+&twai {
+	/* requires external CAN transceiver or jumper on RX and TX pins for loopback testing */
+	status = "disabled";
+	pinctrl-0 = <&twai_default>;
+	pinctrl-names = "default";
+};
+
+&esp32_bt_hci {
+	status = "okay";
+};
+
+&wifi {
+	status = "okay";
+};