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/*****************************************************************************
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 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/>. #
# #
*****************************************************************************/
// #define CMD_SERIAL Serial1
// #define CMD_SERIAL_SPEED 115200
// #define CMD_SERIAL_TIMEOUT 100000
// -- OR --
// #define CMD_SPI
#if !(defined(CMD_SERIAL) || defined(CMD_SPI))
# error CMD phy is not defined
#endif
#include <Arduino.h>
#include "tools.h"
#include "proto.h"
#ifdef CMD_SPI
# include "spi.h"
#endif
#ifdef AUM
# include "aum.h"
#endif
#include "board.h"
#include "outputs.h"
static DRIVERS::Board* _board;
static Outputs _out;
#ifdef HID_DYNAMIC
static bool _reset_required = false;
static unsigned long _reset_timestamp;
#define RESET_TIMEOUT (500000)
#endif
// -----------------------------------------------------------------------------
static void _resetRequest() {
_reset_required = true;
_reset_timestamp = micros();
}
static void _cmdSetKeyboard(const uint8_t *data) { // 1 bytes
# ifdef HID_DYNAMIC
_out.writeOutputs(PROTO::OUTPUTS1::KEYBOARD::MASK, data[0], false);
_resetRequest();
# endif
}
static void _cmdSetMouse(const uint8_t *data) { // 1 bytes
# ifdef HID_DYNAMIC
_out.writeOutputs(PROTO::OUTPUTS1::MOUSE::MASK, data[0], false);
_resetRequest();
# endif
}
static void _cmdSetConnected(const uint8_t *data) { // 1 byte
# ifdef AUM
aumSetUsbConnected(data[0]);
# endif
}
static void _cmdClearHid(const uint8_t *_) { // 0 bytes
_out.kbd->clear();
_out.mouse->clear();
}
static void _cmdKeyEvent(const uint8_t *data) { // 2 bytes
_out.kbd->sendKey(data[0], data[1]);
}
static void _cmdMouseButtonEvent(const uint8_t *data) { // 2 bytes
# define MOUSE_PAIR(_state, _button) \
_state & PROTO::CMD::MOUSE::_button::SELECT, \
_state & PROTO::CMD::MOUSE::_button::STATE
_out.mouse->sendButtons(
MOUSE_PAIR(data[0], LEFT),
MOUSE_PAIR(data[0], RIGHT),
MOUSE_PAIR(data[0], MIDDLE),
MOUSE_PAIR(data[1], EXTRA_UP),
MOUSE_PAIR(data[1], EXTRA_DOWN)
);
# undef MOUSE_PAIR
}
static void _cmdMouseMoveEvent(const uint8_t *data) { // 4 bytes
// See /kvmd/apps/otg/hid/keyboard.py for details
_out.mouse->sendMove(
PROTO::merge8_int(data[0], data[1]),
PROTO::merge8_int(data[2], data[3])
);
}
static void _cmdMouseRelativeEvent(const uint8_t *data) { // 2 bytes
_out.mouse->sendRelative(data[0], data[1]);
}
static void _cmdMouseWheelEvent(const uint8_t *data) { // 2 bytes
// Y only, X is not supported
_out.mouse->sendWheel(data[1]);
}
static uint8_t _handleRequest(const uint8_t *data) { // 8 bytes
if (PROTO::crc16(data, 6) == PROTO::merge8(data[6], data[7])) {
# define HANDLE(_handler) { _handler(data + 2); return PROTO::PONG::OK; }
switch (data[1]) {
case PROTO::CMD::PING: return PROTO::PONG::OK;
case PROTO::CMD::SET_KEYBOARD: HANDLE(_cmdSetKeyboard);
case PROTO::CMD::SET_MOUSE: HANDLE(_cmdSetMouse);
case PROTO::CMD::SET_CONNECTED: HANDLE(_cmdSetConnected);
case PROTO::CMD::CLEAR_HID: HANDLE(_cmdClearHid);
case PROTO::CMD::KEYBOARD::KEY: HANDLE(_cmdKeyEvent);
case PROTO::CMD::MOUSE::BUTTON: HANDLE(_cmdMouseButtonEvent);
case PROTO::CMD::MOUSE::MOVE: HANDLE(_cmdMouseMoveEvent);
case PROTO::CMD::MOUSE::RELATIVE: HANDLE(_cmdMouseRelativeEvent);
case PROTO::CMD::MOUSE::WHEEL: HANDLE(_cmdMouseWheelEvent);
case PROTO::CMD::REPEAT: return 0;
default: return PROTO::RESP::INVALID_ERROR;
}
# undef HANDLE
}
return PROTO::RESP::CRC_ERROR;
}
// -----------------------------------------------------------------------------
static void _sendResponse(uint8_t code) {
static uint8_t prev_code = PROTO::RESP::NONE;
if (code == 0) {
code = prev_code; // Repeat the last code
} else {
prev_code = code;
}
uint8_t response[8] = {0};
response[0] = PROTO::MAGIC_RESP;
if (code & PROTO::PONG::OK) {
response[1] = PROTO::PONG::OK;
# ifdef HID_DYNAMIC
if (_reset_required) {
response[1] |= PROTO::PONG::RESET_REQUIRED;
if (is_micros_timed_out(_reset_timestamp, RESET_TIMEOUT)) {
_board->reset();
}
}
response[2] = PROTO::OUTPUTS1::DYNAMIC;
# endif
if (_out.kbd->getType() != DRIVERS::DUMMY) {
response[1] |= (_out.kbd->isOffline() ? PROTO::PONG::KEYBOARD_OFFLINE : 0);
DRIVERS::KeyboardLedsState leds = _out.kbd->getLeds();
response[1] |= (leds.caps ? PROTO::PONG::CAPS : 0);
response[1] |= (leds.num ? PROTO::PONG::NUM : 0);
response[1] |= (leds.scroll ? PROTO::PONG::SCROLL : 0);
switch (_out.kbd->getType()) {
case DRIVERS::USB_KEYBOARD:
response[2] |= PROTO::OUTPUTS1::KEYBOARD::USB;
break;
case DRIVERS::PS2_KEYBOARD:
response[2] |= PROTO::OUTPUTS1::KEYBOARD::PS2;
break;
}
}
if (_out.mouse->getType() != DRIVERS::DUMMY) {
response[1] |= (_out.mouse->isOffline() ? PROTO::PONG::MOUSE_OFFLINE : 0);
switch (_out.mouse->getType()) {
case DRIVERS::USB_MOUSE_ABSOLUTE_WIN98:
response[2] |= PROTO::OUTPUTS1::MOUSE::USB_WIN98;
break;
case DRIVERS::USB_MOUSE_ABSOLUTE:
response[2] |= PROTO::OUTPUTS1::MOUSE::USB_ABS;
break;
case DRIVERS::USB_MOUSE_RELATIVE:
response[2] |= PROTO::OUTPUTS1::MOUSE::USB_REL;
break;
}
} // TODO: ps2
# ifdef AUM
response[3] |= PROTO::OUTPUTS2::CONNECTABLE;
if (aumIsUsbConnected()) {
response[3] |= PROTO::OUTPUTS2::CONNECTED;
}
# endif
# ifdef HID_WITH_USB
response[3] |= PROTO::OUTPUTS2::HAS_USB;
# ifdef HID_WITH_USB_WIN98
response[3] |= PROTO::OUTPUTS2::HAS_USB_WIN98;
# endif
# endif
# ifdef HID_WITH_PS2
response[3] |= PROTO::OUTPUTS2::HAS_PS2;
# endif
} else {
response[1] = code;
}
PROTO::split16(PROTO::crc16(response, 6), &response[6], &response[7]);
# ifdef CMD_SERIAL
CMD_SERIAL.write(response, 8);
# elif defined(CMD_SPI)
spiWrite(response);
# endif
}
void setup() {
_out.initOutputs();
# ifdef AUM
aumInit();
# endif
# ifdef CMD_SERIAL
CMD_SERIAL.begin(CMD_SERIAL_SPEED);
# elif defined(CMD_SPI)
spiBegin();
# endif
_board = DRIVERS::Factory::makeBoard(DRIVERS::BOARD);
}
void loop() {
# ifdef AUM
aumProxyUsbVbus();
# endif
_out.kbd->periodic();
_out.mouse->periodic();
# ifdef CMD_SERIAL
static unsigned long last = micros();
static uint8_t buffer[8];
static uint8_t index = 0;
if (CMD_SERIAL.available() > 0) {
buffer[index] = (uint8_t)CMD_SERIAL.read();
if (index == 7) {
_sendResponse(_handleRequest(buffer));
index = 0;
} else /*if (buffer[0] == PROTO::MAGIC)*/ { // FIXME: See kvmd/kvmd#80
last = micros();
++index;
}
} else if (index > 0) {
if (is_micros_timed_out(last, CMD_SERIAL_TIMEOUT)) {
_sendResponse(PROTO::RESP::TIMEOUT_ERROR);
index = 0;
}
}
# elif defined(CMD_SPI)
if (spiReady()) {
_sendResponse(_handleRequest(spiGet()));
}
# endif
}
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