8 our $PACKET_SIZE = 9; # 9 bytes + 0x05
11 my ($class, $args) = @_;
23 sub now { return shift->{now} }
26 my ($self, $time, @bytes) = @_;
28 push @{ $self->{bytes} }, @bytes;
29 @bytes = @{ $self->{bytes} };
35 while (@bytes > $PACKET_SIZE) {
36 if ($bytes[0] != 0x55) {
37 push @bad_bytes, shift @bytes;
42 if ($bytes[$PACKET_SIZE] != 0x05
43 || SCX::CRC::digest(@bytes[0..$PACKET_SIZE-2])
44 != $bytes[$PACKET_SIZE-1]) {
45 push @bad_bytes, shift @bytes;
49 if (@bad_bytes) { # Report previous bad bytes first
50 $self->bad_bytes(@bad_bytes);
54 my @packet = splice @bytes, 0, $PACKET_SIZE+1;
55 $self->log_packet(@packet);
56 $self->parse_packet(@packet);
60 while (@bytes && $bytes[0] != 0x55) {
61 push @bad_bytes, shift @bytes;
63 $self->bad_bytes(@bad_bytes);
66 @{ $self->{bytes} } = @bytes;
73 sub unknown_packet { }
74 sub strange_packet { }
77 sub car_programming { }
87 sub display_change { }
89 sub controller_status { }
92 0xAA => \&bus_free_time_packet,
93 0xCC => \&car_programming_packet,
94 0xD0 => \&reset_packet,
95 0xD3 => \&standings_packet,
96 0xD4 => \&car_lap_time_packet,
97 0xD5 => \&race_setup_packet,
98 0xD6 => \&fuel_level_packet,
99 0xD7 => \&brake_set_packet,
100 0xDB => \&qualification_packet,
101 0xDC => \&end_of_race_packet,
102 0xDD => \&race_start_packet,
103 0xDE => \&display_change_packet,
104 0xEE => \&finish_line_packet,
105 0xFF => \&controller_status_packet,
109 my ($self, @data) = @_;
112 my @args = @data[2..7];
114 my $sub = $COMMANDS{$cmd};
117 $self->unknown_packet($cmd, @args);
121 return &$sub($self, @args);
124 sub bus_free_time_packet {
125 my ($self, @bytes) = @_;
127 $self->strange_packet('bus free time', @bytes)
131 || $bytes[5] != 0xF0;
133 $self->bus_free_time($bytes[1], $bytes[0]);
136 sub car_programming_packet {
137 my ($self, @bytes) = @_;
139 $self->strange_packet('car programming', @bytes)
140 if ($bytes[0] & 0xF8) != 0 || ($bytes[0] & 0x07) > 5
145 || $bytes[5] != 0xFF;
147 $self->car_programming($bytes[0] & 0x07);
151 my ($self, @bytes) = @_;
153 $self->strange_packet('reset', @bytes)
157 || $bytes[5] != 0xAA;
159 $self->reset($bytes[1], $bytes[2]);
162 sub standings_packet {
163 my ($self, @bytes) = @_;
165 self->strange_packet('standings', @bytes)
166 if ($bytes[0] != 0xFF && ($bytes[0] & 0x07) > 5)
167 || ($bytes[1] != 0xFF && ($bytes[1] & 0x07) > 5)
168 || ($bytes[2] != 0xFF && ($bytes[2] & 0x07) > 5)
169 || ($bytes[3] != 0xFF && ($bytes[3] & 0x07) > 5)
170 || ($bytes[4] != 0xFF && ($bytes[4] & 0x07) > 5)
171 || ($bytes[5] != 0xFF && ($bytes[5] & 0x07) > 5);
173 $self->standings(map { $_ != 0xFF ? $_ & (0x07) : () } @bytes);
176 sub car_lap_time_packet {
177 my ($self, @bytes) = @_;
179 $self->strange_packet('car lap time', @bytes)
183 || ($bytes[3] & 0xF0) != 0
187 $self->car_lap_time($bytes[0],
188 256*$bytes[1] + $bytes[2] + ($bytes[3] & 0x01 ? 1 : 0),
189 sprintf('%.3f', 0.01024 * (256*$bytes[4] + $bytes[5]
190 + ($bytes[3] & 0x08 ? 1 : 0))),
191 sprintf('%04b', $bytes[3])
195 sub race_setup_packet {
196 my ($self, @bytes) = @_;
198 $self->strange_packet('race setup')
199 if ($bytes[0] != 0x00 && $bytes[0] != 0xFF)
204 || $bytes[5] != 0xFF;
206 my $rounds = $bytes[0] == 0x00
208 : ($bytes[1] & 0x0F) * 256
209 + ($bytes[2] & 0x0F) * 16
210 + ($bytes[3] & 0x0F);
212 $self->race_setup($rounds);
215 sub fuel_level_packet {
216 my ($self, @bytes) = @_;
218 $self->strange_packet('fuel level')
219 if ($bytes[0] >> 4) > 8
220 || ($bytes[0] & 0x0F) > 8
221 || ($bytes[1] >> 4) > 8
222 || ($bytes[1] & 0x0F) > 8
223 || ($bytes[2] >> 4) > 8
224 || ($bytes[2] & 0x0F) > 8
225 || ($bytes[5] != 0xAA && $bytes[5] != 0xFF);
228 $bytes[0] >> 4, $bytes[0] & 0x0f,
229 $bytes[1] >> 4, $bytes[1] & 0x0f,
230 $bytes[2] >> 4, $bytes[2] & 0x0f,
233 $self->fuel_level(@fuel);
236 sub brake_set_packet {
237 my ($self, @bytes) = @_;
239 $self->strange_packet('brake set')
241 || ($bytes[1] != 0x00 && $bytes[1] != 0x02 && $bytes[1] != 0x04)
245 || $bytes[5] != 0xFF;
247 $self->brake_set($bytes[0],
248 $bytes[1] == 0x00 ? 0
249 : $bytes[1] == 0x02 ? 50
253 sub qualification_packet {
254 my ($self, @bytes) = @_;
256 $self->strange_packet('qualification')
262 || $bytes[5] != 0xFF;
264 my $rounds = ($bytes[0] & 0x0F) * 256
265 + ($bytes[1] & 0x0F) * 16
266 + ($bytes[2] & 0x0F);
267 my $cars = $bytes[3];
269 $self->qualification($rounds, $cars);
272 sub end_of_race_packet {
273 my ($self, @bytes) = @_;
275 $self->strange_packet('end of race')
281 || $bytes[5] != 0xFF;
283 $self->end_of_race();
286 sub race_start_packet {
287 my ($self, @bytes) = @_;
289 $self->strange_packet('race start')
295 || $bytes[5] != 0xAA;
300 sub display_change_packet {
301 my ($self, @bytes) = @_;
303 $self->strange_packet('display change')
309 || $bytes[5] != 0xFF;
311 $self->display_change();
316 # FIXME: we still do not know the meaning of the bytes
317 sub finish_line_packet {
318 my ($self, @bytes) = @_;
321 for my $byte (@bytes) {
329 my $msg = 'Strange finish_line packet'
335 my $byte = $bytes[$i];
338 if $byte != 0xAA && $byte != 0xE7 && $byte != 0xFE;
340 push @cars_finished, $i if $byte == 0xE7;
343 $self->log_cmd('finish_line', $regular, @cars_finished);
344 $self->track->finish_line(
345 $self->{last_read_time},
354 sub finish_line_packet {
355 my ($self, @bytes) = @_;
358 for my $byte (@bytes) {
366 $self->strange_packet('finish line')
372 my $byte = $bytes[$i];
375 if $byte != 0xAA && $byte != 0xE7 && $byte != 0xFE;
377 push @cars_finished, $i if $byte == 0xE7;
380 $self->finish_line($regular, @cars_finished);
383 sub controller_status_packet {
384 my ($self, @bytes) = @_;
387 for my $byte (@bytes) {
388 next if $byte == 0xAA;
390 if ($byte & 0xC0) != 0xC0
391 || ($byte & 0x0F) > 12
394 $self->strange_packet('controller status')
400 my $byte = $bytes[$car];
403 push @ctrl_data, undef;
407 my $light = ($byte & 0x20) ? 0 : 1;
408 my $backbutton = ($byte & 0x10) ? 0 : 1;
409 my $throttle = $byte & 0x0f;
412 throttle => $throttle,
413 button => $backbutton,
418 $self->controller_status(@ctrl_data);