- # print join(' ', map { sprintf(" %02x", $_) } @bytes), "\n";
- push @{ $self->{bytes} }, @bytes;
- @bytes = @{ $self->{bytes} };
-
- my @bad_bytes;
-
- while (@bytes > $PACKET_SIZE) {
- if ($bytes[0] != 0x55) {
- push @bad_bytes, shift @bytes;
- next;
- }
- my $cmd = $bytes[1];
-
- if ($bytes[$PACKET_SIZE] != 0x05
- || SCX::CRC::digest(@bytes[0..$PACKET_SIZE-2])
- != $bytes[$PACKET_SIZE-1]) {
- push @bad_bytes, shift @bytes;
- next;
- }
-
- if (@bad_bytes) { # Report previous bad bytes first
- $self->log_bytes(\@bad_bytes, "Cannot parse packet");
- @bad_bytes = ();
- }
-
- my @packet = splice @bytes, 0, $PACKET_SIZE+1;
- my $rv = $self->handle_packet(@packet);
- $self->log_bytes(\@packet, $rv);
- $self->track->packet_received($self->{last_read_time});
- }
-
- if (@bad_bytes) {
- while (@bytes && $bytes[0] != 0x55) {
- push @bad_bytes, shift @bytes;
- }
- $self->log_bytes(\@bad_bytes, "cannot parse packet");
- }
-
- @{ $self->{bytes} } = @bytes;
-}
-
-sub log_print {
- my ($self, @data) = @_;
-
- my $size = $self->{logfh}->tell;
-
- if ($size >= $LOG_FILE_LIMIT) {
- close $self->{logfh};
- $self->{log_gen} = $self->{log_gen} ? 0 : 1;
- open my $fh, '>', $self->{logfile} . '.' . $self->{log_gen}
- or die "Can't open $self->{logfile}.$self->{log_gen}: $!";
- $self->{logfh} = $fh;
- }
-
- $self->{logfh}->print(sprintf('% 10.3f ', $self->{last_read_time}),
- join(' ', @data, "\n"));
- $self->{logfh}->flush;
-}
-
-sub log_bytes {
- my ($self, $bytes, $msg) = @_;
-
- return if !@$bytes;
-
- $msg = defined $msg ? '# ' . $msg : '';
-
- $self->log_print((map { sprintf("%02x", $_) } @$bytes), $msg);
-}
-
-sub log_cmd {
- my ($self, @args) = @_;
-
- $self->log_print('cmd', @args);
-}
-
-our %COMMANDS = (
- 0xAA => \&bus_free_time_packet,
- 0xCC => \&car_programming_packet,
- 0xD0 => \&reset_packet,
- 0xD3 => \&standings_packet,
- 0xD4 => \&lap_time_packet,
- 0xD5 => \&race_setup_packet,
- 0xD6 => \&fuel_level_packet,
- 0xD7 => \&brake_set_packet,
- 0xDB => \&qualification_packet,
- 0xDC => \&end_of_race_packet,
- 0xDD => \&race_start_packet,
- 0xDE => \&display_change_packet,
- 0xEE => \&finish_line_packet,
- 0xFF => \&controller_status_packet,
-);
-
-sub handle_packet {
- my ($self, @data) = @_;
-
- my $cmd = $data[1];
- my @args = @data[2..7];
-
- my $sub = $COMMANDS{$cmd};
- return "Unknown packet"
- if !defined $sub;
-
- return &$sub($self, @args);
-}
-
-sub bus_free_time_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange bus free time packet'
- if $bytes[2] != 0xF0
- || $bytes[3] != 0xF0
- || $bytes[4] != 0xF0
- || $bytes[5] != 0xF0;
-
- return $msg; # No need to handle this, I think
-}
-
-sub car_programming_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange car programming packet'
- if ($bytes[0] & 0xF8) != 0 || ($bytes[0] & 0x07) > 5
- || $bytes[1] != 0xFE
- || $bytes[2] != 0xFF
- || $bytes[3] != 0xFF
- || $bytes[4] != 0xFF
- || $bytes[5] != 0xFF;
-
- return $msg; # No need to handle this
-}
-
-sub reset_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange reset packet'
- if $bytes[0] != 0xFF
- || $bytes[3] != 0xAA
- || $bytes[4] != 0xAA
- || $bytes[5] != 0xAA;
-
- $self->log_cmd('reset');
- $self->track->reset;
-
- return $msg;
-}
-
-sub standings_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange standings packet'
- if ($bytes[0] != 0xFF && ($bytes[0] & 0x07) > 5)
- || ($bytes[1] != 0xFF && ($bytes[1] & 0x07) > 5)
- || ($bytes[2] != 0xFF && ($bytes[2] & 0x07) > 5)
- || ($bytes[3] != 0xFF && ($bytes[3] & 0x07) > 5)
- || ($bytes[4] != 0xFF && ($bytes[4] & 0x07) > 5)
- || ($bytes[5] != 0xFF && ($bytes[5] & 0x07) > 5);
-
- my @standings;
-
- push @standings, map { $_ != 0xFF ? $_ & (0x07) : () } @bytes;
-
- return $msg; # We do internal standings handling
-}
-
-sub lap_time_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange lap time packet'
- if $bytes[0] > 5
- || $bytes[1] & 0x01
- || $bytes[2] & 0x01
- || ($bytes[3] & 0xF0) != 0
- || $bytes[4] & 0x01
- || $bytes[5] & 0x01;
-
- return $msg;
-}
-
-sub race_setup_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange race setup packet'
- if ($bytes[0] != 0x00 && $bytes[0] != 0xFF)
- || $bytes[1] & 0xF0
- || $bytes[2] & 0xF0
- || $bytes[3] & 0xF0
- || $bytes[4] != 0xFF
- || $bytes[5] != 0xFF;
-
- my $rounds = $bytes[0] == 0x00
- ? 0
- : ($bytes[1] & 0x0F) * 256
- + ($bytes[2] & 0x0F) * 16
- + ($bytes[3] & 0x0F);
-
- $self->log_cmd('race_setup', $rounds);
- $self->track->race_setup($rounds, $self->{last_read_time});
-
- return $msg;
-}
-
-sub fuel_level_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange fuel_level packet'
- if ($bytes[0] >> 4) > 8
- || ($bytes[0] & 0x0F) > 8
- || ($bytes[1] >> 4) > 8
- || ($bytes[1] & 0x0F) > 8
- || ($bytes[2] >> 4) > 8
- || ($bytes[2] & 0x0F) > 8
- || ($bytes[5] != 0xAA && $bytes[5] != 0xFF);
-
- my @fuel = (
- $bytes[0] >> 4, $bytes[0] & 0x0f,
- $bytes[1] >> 4, $bytes[1] & 0x0f,
- $bytes[2] >> 4, $bytes[2] & 0x0f,
- );
-
- $self->log_cmd('fuel', @fuel);
- for my $car (0..5) {
- $self->track->car($car)->set_fuel($fuel[$car]);
- }
-
- return $msg;
-}
-
-
-sub brake_set_packet {
- my ($self, @bytes) = @_;
-
- return 'Unexpected brake_set packet (should be in the pit lane only)';
-}
-
-
-sub qualification_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange qualification packet'
- if $bytes[0] & 0xF0
- || $bytes[1] & 0xF0
- || $bytes[2] & 0xF0
- || $bytes[3] > 6
- || $bytes[4] != 0xFF
- || $bytes[5] != 0xFF;
-
- my $rounds = ($bytes[0] & 0x0F) * 256
- + ($bytes[1] & 0x0F) * 16
- + ($bytes[2] & 0x0F);
- my $cars = $bytes[3];
- $self->log_cmd('qualification_start', $rounds, $cars);
- $self->track->qualification_setup($rounds, $cars,
- $self->{last_read_time});
-
- return $msg;
-}
-
-
-sub end_of_race_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange end_of_race packet'
- if $bytes[0] != 0xFF
- || $bytes[1] != 0xFF
- || $bytes[2] != 0xFF
- || $bytes[3] != 0xFF
- || $bytes[4] != 0xFF
- || $bytes[5] != 0xFF;
-
- $self->log_cmd('race_end');
- $self->track->race_end;
-
- return $msg;
-}
-
-
-sub race_start_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange race_start packet'
- if $bytes[0] != 0x00
- || $bytes[1] != 0xAA
- || $bytes[2] != 0xAA
- || $bytes[3] != 0xAA
- || $bytes[4] != 0xAA
- || $bytes[5] != 0xAA;
-
- $self->log_cmd('race_start');
- $self->track->race_start($self->{last_read_time});
-
- return $msg;
-}
-
-
-sub display_change_packet {
- my ($self, @bytes) = @_;
-
- my $msg = 'Strange display_change packet'
- if $bytes[0] & 0xFE
- || $bytes[1] != 0xFF
- || $bytes[2] != 0xFF
- || $bytes[3] != 0xFF
- || $bytes[4] != 0xFF
- || $bytes[5] != 0xFF;
-
- return $msg; # FIXME - to be implemented
-}
-
-
-sub finish_line_packet {
- my ($self, @bytes) = @_;
-
- my $fail;
- for my $byte (@bytes) {
- $fail = 1
- if $byte != 0xAA
- && $byte != 0xE7
- && $byte != 0xF0
- && $byte != 0xFE
- }
-
- my $msg = 'Strange finish_line packet'
- if $fail;
-
- my $regular = 1;
- my @cars_finished;
- for my $i (0..5) {
- my $byte = $bytes[$i];
-
- $regular = 0
- if $byte != 0xAA && $byte != 0xE7 && $byte != 0xFE;
-
- push @cars_finished, $i if $byte == 0xE7;
- }
-
- $self->log_cmd('finish_line', $regular, @cars_finished);
- $self->track->finish_line(
- $self->{last_read_time},
- $regular,
- @cars_finished
- );
-
- return $msg;
-}
-
-sub controller_status_packet {
- my ($self, @bytes) = @_;
-
- my $fail;
- for my $byte (@bytes) {
- next if $byte == 0xAA;
- $fail = 1
- if ($byte & 0xC0) != 0xC0
- || ($byte & 0x0F) > 12
- }
-
- my $msg = 'Strange controller_status packet'
- if $fail;
-
- my @log_data;
-
- for my $car (0..5) {
- my $byte = $bytes[$car];
-
- if ($byte == 0xAA) {
- $self->track->car($car)->set_throttle(undef, undef,
- $self->{last_read_time});
- push @log_data, 'undef', '0';
- next;
- }
-
- my $light = !($byte & 0x20);
- my $backbutton = !($byte & 0x10);
- my $throttle = $byte & 0x0f;
-
- push @log_data, $throttle, $backbutton ? 1 : 0;
- $self->track->car($car)->set_throttle($throttle, $backbutton,
- $self->{last_read_time});
- $self->track->car($car)->set_light($light);
- }
-
- $self->log_cmd('throttle', @log_data);
-
- return $msg;