Initial import of firmware and host projects

app.overlay

@@ -0,0 +1,47 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+/ {
+    chosen {
+        zephyr,boot-mode = &boot_mode0;
+    };
+
+    hid_dev_0: hid_dev_0 {
+        compatible = "zephyr,hid-device";
+        label = "HID_BOOT";
+        protocol-code = "keyboard";
+        in-report-size = <8>;
+        in-polling-period-us = <1000>;
+        out-report-size = <8>;
+        out-polling-period-us = <1000>;
+    };
+
+    hid_dev_1: hid_dev_1 {
+        compatible = "zephyr,hid-device";
+        label = "HID_NKRO";
+        protocol-code = "none";
+        in-report-size = <31>;
+        in-polling-period-us = <1000>;
+        out-report-size = <31>;
+        out-polling-period-us = <1000>;
+    };
+
+    raw_hid: hid_dev_2 {
+        compatible = "zephyr,hid-device";
+        label = "HID_RAW";
+        protocol-code = "none";
+        in-report-size = <64>;
+        in-polling-period-us = <1000>;
+        out-report-size = <64>;
+        out-polling-period-us = <1000>;
+    };
+};
+
+&gpregret1 {
+    status = "okay";
+
+    boot_mode0: boot_mode@0 {
+        compatible = "zephyr,retention";
+        status = "okay";
+        reg = <0x0 0x1>;
+    };
+};