use gpio module to display raspberry pi pins

[x300-pci] / gpio.pl

diff --git a/gpio.pl b/gpio.pl
index 69390e2..a701ce9 100755 (executable)
--- a/gpio.pl
+++ b/gpio.pl
@@ -1,12 +1,20 @@
 #!/usr/bin/perl
+use warnings;
+use strict;
+
+package gpio;
+
+use Data::Dump qw(dump);
 
 my @last;
+my $mode;
 
-while(1) {
+sub pins {
 
 my @pcf = `gpio -x pcf8591:120:0x48 readall`;
 my @gpio = `gpio -g readall`;
 my $i = 0;
+
 foreach (@gpio) {
        chomp;
 #      next unless /\d\s/;
@@ -20,8 +28,17 @@ foreach (@gpio) {
 
        my $line = $_ . ( shift @pcf || '');
        chomp $line;
+       my @l = split(/\|/, $line);
+       if ( $#l > 10 ) {
+               no warnings;
+               $mode->{ $l[1]  } = [ $l[4] + 0, $l[2], $l[3] ];
+               $mode->{ $l[11] } = [ $l[8] + 0, $l[10], $l[9] ];
+               $mode->{ $l[13] } = [ $l[14], $l[15] ] if $l[15];
+               #warn "## l = ",dump(@l);
+       }
+       
+
        if ( $last[$i] && $line ne $last[$i] ) {
-               my @l = split(/\|/, $line);
                my @o = split(/\|/, $last[$i]);
                foreach my $i ( 0 .. $#l ) {
                        $l[$i] = "\e[33;7;1m$l[$i]\e[0m" if $l[$i] ne $o[$i];
@@ -32,17 +49,43 @@ foreach (@gpio) {
        }
        $last[$i] = $line;
        $i++;
+
+}
+
+#warn "# mode = ", dump($mode);
+
+} #/gpio
+
+sub pin2dir {
+       my $pin = shift;
+       my ($p) = grep { /$pin/ } keys %$mode;
+warn dump($p);
+       my $dir = $mode->{ $p }->[2];
+       warn "# pin2dir $pin = $dir\n";
+       return $dir;
 }
 
-my $cmd = <STDIN>;
-chomp $cmd;
-if ( $cmd =~ m/^(\d+)$/ ) {
-       my $v = `gpio -g read $1`;
-       warn "# pin $1 ", $v;
-       $v ^= 1;
-       system "gpio -g write $1 $v";
+sub cmd {
+       my $cmd = shift;
+       chomp $cmd;
+       if ( $cmd =~ m/^(\d+)$/ ) {
+               my $pin = $1;
+               system "gpio -g mode $pin out" unless pin2dir($pin) =~ m/OUT/i;
+
+               my $v = `gpio -g read $pin`;
+               warn "# pin $pin ", $v;
+               $v ^= 1;
+               system "gpio -g write $pin $v";
+       }
 }
 
+package main;
+
+return 1 if caller; # used as module
 
-} #/while
+while(1) {
+       gpio::pins();
+       my $cmd = <STDIN>;
+       gpio::cmd($cmd);
+}