Initial import of firmware and host projects

KeyBorad/proto/keyboard.proto

@@ -0,0 +1,83 @@
+syntax = "proto3";
+
+package keyboard.cdc;
+
+// The AA55 CDC frame still lives outside protobuf:
+// [head1][head2][len][type][data][checksum]
+// `data` is the serialized protobuf payload for the matching `type`.
+// Keep the outer `type` field for fast dispatch and debugging.
+
+enum CdcPacketType {
+  CDC_PACKET_TYPE_UNKNOWN = 0;
+  CDC_PACKET_TYPE_HELLO_REQ = 1;
+  CDC_PACKET_TYPE_HELLO_RSP = 2;
+  CDC_PACKET_TYPE_BITMAP = 16;
+  CDC_PACKET_TYPE_FUNCTION_KEY_EVENT = 32;
+  CDC_PACKET_TYPE_LED_STATE = 33;
+  CDC_PACKET_TYPE_TIME_SYNC = 48;
+  CDC_PACKET_TYPE_THEME_RGB = 49;
+  CDC_PACKET_TYPE_ACK = 126;
+  CDC_PACKET_TYPE_ERROR = 127;
+}
+
+enum KeyAction {
+  KEY_ACTION_RELEASE = 0;
+  KEY_ACTION_PRESS = 1;
+}
+
+enum ErrorCode {
+  ERROR_CODE_NONE = 0;
+  ERROR_CODE_UNKNOWN_TYPE = 1;
+  ERROR_CODE_INVALID_LENGTH = 2;
+  ERROR_CODE_INVALID_PARAM = 3;
+  ERROR_CODE_NOT_READY = 4;
+}
+
+message HelloReqPayload {
+  uint32 protocol_version = 1;
+}
+
+message HelloRspPayload {
+  uint32 protocol_version = 1;
+  uint32 vendor_id = 2;
+  uint32 product_id = 3;
+  uint32 firmware_major = 4;
+  uint32 firmware_minor = 5;
+  uint32 capability_flags = 6;
+}
+
+message BitmapPayload {
+  bytes usage_bitmap = 1;
+}
+
+message FunctionKeyEventPayload {
+  uint32 usage = 1;
+  KeyAction action = 2;
+}
+
+message LedStatePayload {
+  uint32 led_mask = 1;
+}
+
+message TimeSyncPayload {
+  uint32 version = 1;
+  uint32 flags = 2;
+  sint32 timezone_min = 3;
+  fixed64 utc_ms = 4;
+  fixed32 accuracy_ms = 5;
+}
+
+message ThemeRgbPayload {
+  uint32 red = 1;
+  uint32 green = 2;
+  uint32 blue = 3;
+}
+
+message AckPayload {
+  uint32 acked_type = 1;
+}
+
+message ErrorPayload {
+  uint32 error_type = 1;
+  ErrorCode error_code = 2;
+}