improved mac uefi keys handling

hid/src/main.cpp

@@ -36,6 +36,7 @@
 #	include <avr/eeprom.h>
 #endif
 
+#include "tools.h"
 #include "proto.h"
 #ifdef CMD_SPI
 #	include "spi.h"
@@ -337,6 +338,11 @@ int main() {
 		aumProxyUsbVbus();
 #		endif
 
+#		ifdef HID_WITH_USB
+		if (_usb_kbd) {
+			_usb_kbd->periodic();
+		}
+#		endif
 #		ifdef HID_WITH_PS2
 		if (_ps2_kbd) {
 			_ps2_kbd->periodic();
@@ -354,11 +360,7 @@ int main() {
 				++index;
 			}
 		} else if (index > 0) {
-			unsigned long now = micros();
+			if (is_micros_timed_out(last, CMD_SERIAL_TIMEOUT)) {
-			if (
-				(now >= last && now - last > CMD_SERIAL_TIMEOUT)
-				|| (now < last && ((unsigned long)-1) - last + now > CMD_SERIAL_TIMEOUT)
-			) {
 				_sendResponse(PROTO::RESP::TIMEOUT_ERROR);
 				index = 0;
 			}

hid/src/tools.h

@@ -0,0 +1,32 @@
+/*****************************************************************************
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018-2021  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    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
+
+
+bool is_micros_timed_out(unsigned long start_ts, unsigned long timeout) {
+	unsigned long now = micros();
+	return (
+		(now >= start_ts && now - start_ts > timeout)
+		|| (now < start_ts && ((unsigned long)-1) - start_ts + now > timeout)
+	);
+}

hid/src/usb/hid.h

@@ -25,6 +25,7 @@
 #include <Arduino.h>
 #include <HID-Project.h>
 
+#include "../tools.h"
 #ifdef AUM
 #	include "../aum.h"
 #endif
@@ -73,16 +74,27 @@ class UsbKeyboard {
 			_kbd.begin();
 		}
 
+		void periodic() {
+#			ifdef HID_USB_CHECK_ENDPOINT
+			if (is_micros_timed_out(_last, 10000)) {
+				if (!_sent) {
+					_sendCurrent();
+				}
+				_last = micros();
+			}
+#			endif
+		}
+
 		void clear() {
 			_kbd.releaseAll();
 		}
 
 		void sendKey(uint8_t code, bool state) {
-			CHECK_HID_EP;
 			KeyboardKeycode usb_code = keymapUsb(code);
 			if (usb_code != KEY_ERROR_UNDEFINED) {
-				if (state) _kbd.press(usb_code);
+				if (state ? _kbd.add(usb_code) : _kbd.remove(usb_code)) {
-				else _kbd.release(usb_code);
+					_sendCurrent();
+				}
 			}
 		}
 
@@ -99,6 +111,20 @@ class UsbKeyboard {
 
 	private:
 		BootKeyboard_ _kbd;
+		bool _sent = true;
+		unsigned long _last = 0;
+
+		void _sendCurrent() {
+#			ifdef HID_USB_CHECK_ENDPOINT
+			if (getOfflineAs(1)) {
+				_sent = false;
+			} else {
+#			endif
+				_sent = (_kbd.send() >= 0);
+#			ifdef HID_USB_CHECK_ENDPOINT
+			}
+#			endif
+		}
 };
 
 #define CLS_SEND_BUTTONS \