package SCX::Reader;
+use strict;
+
use Time::HiRes qw(gettimeofday tv_interval);
use FileHandle;
+use IO::Handle;
+use POSIX;
use SCX::CRC;
-our $PACKET_SIZE = 10;
+our $PACKET_SIZE = 9; # 9 bytes + 0x05
our $LOG_ROTATE = 600;
sub new {
my ($class, $args) = @_;
- my $callback = $args->{callback}
- or die "callback arg not defined";
-
my $portname = $args->{portname}
or die "portname not specified";
die "stty died with code $? (no permissions?)";
}
- open my $tty, '<:raw', $portname
+ sysopen(my $fh, $portname, O_RDONLY|O_NONBLOCK)
or die "Can't open $portname: $!";
my $logfile = $args->{logfile};
my $self = {
portname => $portname,
- fh => $tty,
+ fh => $fh,
logfile => $logfile,
logfh => $logfh,
log_gen => $log_gen,
log_start => $now,
starttime => $now,
- callback => $callback,
+ track => $args->{track},
bytes => [],
};
sub fh { return shift->{fh}; }
+sub track { return shift->{track}; }
+
sub read {
my ($self) = @_;
die "Read error on $self->{portname}: $!"
if !$bytes_read;
- my $now = gettimeofday;
- if ($now - $self->{log_start} >= $LOG_ROTATE) {
- close $self->{logfh};
- $self->{log_gen} = $self->{log_gen} ? 0 : 1;
- open my $fh, '>', $logfile . '.' . $self->{log_gen}
- or die "Can't open $logfile.$self->{log_gen}: $!";
- $self->{logfh} = $fh;
- $self->{log_start} = $now;
- }
-
my @bytes = unpack("C*", $data);
- $self->{logfh}->print(sprintf('% 10.3f', $now - $self->{starttime}),
- (map { sprintf(" %02x", $_) } @bytes),
- "\n");
-
+ # 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 || $bytes[9] != 0x05
- || SCX::CRC::digest(@bytes[0..7]) != $bytes[8]) {
+ while (@bytes > $PACKET_SIZE) {
+ if ($bytes[0] != 0x55) {
push @bad_bytes, shift @bytes;
next;
}
+ my $cmd = $bytes[1];
- if (@bad_bytes) {
- $self->{logfh}->print("Cannot parse bytes",
- (map { sprintf(' %02x', $_) } @bad_bytes),
- "\n");
+ if ($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 = ();
}
- $self->{logfh}->print("Callback\n");
- &{ $self->{callback} }(@bytes[1..7]);
- splice @bytes, 0, 10;
+ my @packet = splice @bytes, 0, $PACKET_SIZE+1;
+ my $rv = $self->handle_packet(@packet);
+ $self->log_bytes(\@packet, $rv);
}
if (@bad_bytes) {
- $self->{logfh}->print("Cannot parse bytes",
- (map { sprintf(' %02x', $_) } @bad_bytes),
- "\n");
- @bad_bytes = ();
+ while (@bytes && $bytes[0] != 0x55) {
+ push @bad_bytes, shift @bytes;
+ }
+ $self->log_bytes(\@bad_bytes, "cannot parse packet");
}
@{ $self->{bytes} } = @bytes;
}
+sub log_bytes {
+ my ($self, $bytes, $msg) = @_;
+
+ return if !@$bytes;
+
+ $msg = defined $msg ? ' # ' . $msg : '';
+
+ my $now = gettimeofday;
+
+ if ($now - $self->{log_start} >= $LOG_ROTATE) {
+ 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->{log_start} = $now;
+ }
+
+ $self->{logfh}->print(sprintf('% 10.3f', $now - $self->{starttime}),
+ (map { sprintf(" %02x", $_) } @$bytes),
+ $msg, "\n");
+ $self->{logfh}->flush;
+}
+
+our %COMMANDS = (
+ 0xAA => \&bus_free_time_packet,
+ 0xCC => \&car_programming_packet,
+ 0xD0 => \&reset_packet,
+ 0xD3 => \&standings_packet,
+ 0xD4 => \&lap_time_packet,
+ 0xD5 => \&race_setup_packet,
+ 0xD6 => \&fuel_level_packet,
+ 0xD7 => \&brake_set_packet,
+ 0xDB => \&qualification_packet,
+ 0xDC => \&end_of_race_packet,
+ 0xDD => \&race_start_packet,
+ 0xDE => \&display_change_packet,
+ 0xEE => \&finish_line_packet,
+ 0xFF => \&controller_status_packet,
+);
+
+sub handle_packet {
+ my ($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 $msg;
+}
+
+sub reset_packet {
+ my ($self, @bytes) = @_;
+
+ my $msg = 'Strange reset packet'
+ if $bytes[0] != 0xFF
+ || $bytes[3] != 0xAA
+ || $bytes[4] != 0xAA
+ || $bytes[5] != 0xAA;
+
+ return $msg; # FIXME - to be implemented
+}
+
+sub standings_packet {
+ my ($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 $msg; # FIXME - to be implemented
+}
+
+sub lap_time_packet {
+ my ($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;
+
+ my $nonzero = grep { $_ != 0 } @bytes;
+
+ my $car = $bytes[0];
+ my $round = 256*$bytes[1] + $bytes[2]
+ + ($bytes[3] & 2 ? 256 : 0)
+ + ($bytes[3] & 1 ? 1 : 0);
+ my $time = 256*$bytes[4] + $bytes[5]
+ + ($bytes[3] & 8 ? 256 : 0)
+ + ($bytes[3] & 4 ? 1 : 0);
+ if ($time == 65535) {
+ $self->track->car($car)->enter_pit_lane;
+ } else {
+ $time *= 0.01024;
+
+ if ($nonzero) {
+ $self->track->car($car)->set_lap($round);
+ $self->track->car($car)->set_laptime($time);
+ } else {
+ # FIXME - probably reset race time or whatever
+ # all-zeros packet is sent after the race setup
+ }
+ }
+
+ 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;
+
+ for my $car (0..5) {
+ $self->track->car($car)->set_lap(0);
+ $self->track->car($car)->set_laptime(undef);
+ }
+
+ $self->track->race_setup($bytes[0] == 0x00
+ ? 0
+ : $bytes[1] & 0x0F * 256
+ + $bytes[2] & 0x0F * 16
+ + $bytes[3] & 0x0F);
+
+ return $msg; # FIXME - to be implemented
+}
+
+
+sub fuel_level_packet {
+ my ($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,
+ );
+
+ 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] > 5
+ || $bytes[4] != 0xFF
+ || $bytes[5] != 0xFF;
+
+ for my $car (0..5) {
+ $self->track->car($car)->set_lap(undef);
+ $self->track->car($car)->set_laptime(undef);
+ }
+
+ return $msg; # FIXME - to be implemented
+}
+
+
+sub end_of_race_packet {
+ my ($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->track->race_end;
+
+ return $msg; # FIXME - to be implemented
+}
+
+
+sub race_start_packet {
+ my ($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->track->race_start;
+
+ return $msg; # FIXME - to be implemented
+}
+
+
+sub display_change_packet {
+ my ($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 $pit_lane_entry;
+ my @cars_finished;
+ for my $i (0..5) {
+ my $byte = $bytes[$i];
+
+ $pit_lane_entry = 1 if $byte == 0xF0;
+ push @cars_finished, $i if $byte == 0xE7;
+ }
+
+ if ($pit_lane_entry) {
+ for my $car (@cars_finished) {
+ $self->track->car($car)->enter_pit_lane;
+ }
+ }
+
+ return $msg; # FIXME - to be implemented
+}
+
+sub controller_status_packet {
+ my ($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 @fuel = (
+ $bytes[1] >> 4, $bytes[1] & 0x0f,
+ $bytes[2] >> 4, $bytes[2] & 0x0f,
+ $bytes[3] >> 4, $bytes[3] & 0x0f,
+ );
+
+ for my $car (0..5) {
+ my $byte = $bytes[$car];
+
+ if ($byte == 0xAA) {
+ $self->track->car($car)->set_throttle(undef);
+ next;
+ }
+
+ my $light = !($byte & 0x20);
+ my $backbutton = !($byte & 0x10);
+ my $throttle = $byte & 0x0f;
+
+ $self->track->car($car)->set_throttle($throttle);
+ $self->track->car($car)->set_light($light);
+ $self->track->car($car)->set_backbutton($backbutton);
+ }
+
+ return $msg;
+}
+
1;
https://www.fi.muni.cz/~kas/git / slotcarman.git / blobdiff