This is probably the simplest way: 
sub inputPin
{
  my $s = sprintf("Device::BCM2835::RPI_V2_GPIO_P1_%02d", $_[0]);
  return (\&$s)->();
}

inputPin(7);
inputPin(6);
etc..

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In reply to Re: How to make a variable in hard call. by Anonymous Monk
in thread How to make a variable in hard call. by Konan

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