spi firmware

1 files changed, 76 insertions, 0 deletions

diff --git a/hid/src/proto.h b/hid/src/proto.h
new file mode 100644
index 00000000..36502d4f
--- /dev/null
+++ b/hid/src/proto.h
@@ -0,0 +1,76 @@
+/*****************************************************************************
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+
+#define PROTO_MAGIC			0x33
+#define PROTO_CRC_POLINOM	0xA001
+
+#define PROTO_RESP_OK				0x20
+#define PROTO_RESP_NONE				0x24
+#define PROTO_RESP_CRC_ERROR		0x40
+#define PROTO_RESP_INVALID_ERROR	0x45
+#define PROTO_RESP_TIMEOUT_ERROR	0x48
+
+#define PROTO_RESP_PONG_PREFIX	0x80
+#define PROTO_RESP_PONG_CAPS	0b00000001
+#define PROTO_RESP_PONG_SCROLL	0b00000010
+#define PROTO_RESP_PONG_NUM		0b00000100
+
+#define PROTO_CMD_PING					0x01
+#define PROTO_CMD_REPEAT				0x02
+#define PROTO_CMD_RESET_HID				0x10
+#define PROTO_CMD_KEY_EVENT				0x11
+#define PROTO_CMD_MOUSE_BUTTON_EVENT	0x13 // Legacy sequence
+#define PROTO_CMD_MOUSE_MOVE_EVENT		0x12
+#define PROTO_CMD_MOUSE_WHEEL_EVENT		0x14
+
+#define PROTO_CMD_MOUSE_BUTTON_LEFT_SELECT		0b10000000
+#define PROTO_CMD_MOUSE_BUTTON_LEFT_STATE		0b00001000
+#define PROTO_CMD_MOUSE_BUTTON_RIGHT_SELECT		0b01000000
+#define PROTO_CMD_MOUSE_BUTTON_RIGHT_STATE		0b00000100
+#define PROTO_CMD_MOUSE_BUTTON_MIDDLE_SELECT	0b00100000
+#define PROTO_CMD_MOUSE_BUTTON_MIDDLE_STATE		0b00000010
+
+#define PROTO_CMD_MOUSE_BUTTON_EXTRA_UP_SELECT		0b10000000
+#define PROTO_CMD_MOUSE_BUTTON_EXTRA_UP_STATE		0b00001000
+#define PROTO_CMD_MOUSE_BUTTON_EXTRA_DOWN_SELECT	0b01000000
+#define PROTO_CMD_MOUSE_BUTTON_EXTRA_DOWN_STATE		0b00000100
+
+
+uint16_t protoCrc16(const uint8_t *buffer, unsigned length) {
+	uint16_t crc = 0xFFFF;
+
+	for (unsigned byte_count = 0; byte_count < length; ++byte_count) {
+		crc = crc ^ buffer[byte_count];
+		for (unsigned bit_count = 0; bit_count < 8; ++bit_count) {
+			if ((crc & 0x0001) == 0) {
+				crc = crc >> 1;
+			} else {
+				crc = crc >> 1;
+				crc = crc ^ PROTO_CRC_POLINOM;
+			}
+		}
+	}
+	return crc;
+}