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Raspberry Pi Blink Ip Address
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| #!/usr/bin/perl | |
| my $dev = "/sys/class/leds/led0/brightness"; | |
| my $OFF = "1"; | |
| my $ON = "0"; | |
| my ($ip) = `ifconfig`=~/ddr:(.*?) /; | |
| #print $ip; | |
| # Strip out the .'s | |
| $ip =~ s/\.//g; | |
| while (1) { | |
| display_start(); | |
| while ($ip =~ /(.)/g) { | |
| my $char = $1; | |
| print "$char\n"; | |
| if ($char eq '0' || $char == 0) { | |
| display_zero(); | |
| } else { | |
| display_blink($char, .25, .25); | |
| } | |
| usleep(2); | |
| } | |
| usleep(2); | |
| } | |
| sub display_start { | |
| for (my $i=0; $i < 50; $i++) { | |
| usleep(.05); | |
| outb($ON); | |
| usleep(.05); | |
| outb($OFF); | |
| } | |
| usleep(4); | |
| } | |
| sub display_zero { | |
| for (my $i=0; $i < 10; $i++) { | |
| usleep(.05); | |
| outb($ON); | |
| usleep(.05); | |
| outb($OFF); | |
| } | |
| } | |
| sub display_blink { | |
| my $char = shift; | |
| my $dwell = shift; | |
| my $delay = shift; | |
| for (my $i=0; $i < $char; $i++) { | |
| usleep($dwell); | |
| outb($ON); | |
| usleep($delay); | |
| outb($OFF); | |
| } | |
| } | |
| sub outb { | |
| my $char = shift; | |
| `echo $char > $dev`; | |
| } | |
| sub usleep { | |
| my $time_seconds = shift; | |
| select(undef, undef, undef, $time_seconds); | |
| } |
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