NAME

PINE64::PCF8574 - Perl interface to the PCF8574 GPIO extender

SYNOPSIS

use PINE64::PCF8574; 

my $gpext = PCF8574->new(0x20); 

#turn on 8 LEDs in order and then turn them off
for(my $i=0;$i<8;$i++){
	$gpext->write_pin($i, 0); 
	sleep(1); 
	$gpext->write_pin($i, 1);
}#end for
for(my $i=7;$i>=0;$i--){
	$gpext->write_pin($i, 0); 
	sleep(1); 
	$gpext->write_pin($i, 1); 
}#end for

METHODS

write_pin($pin, $value)

Sets GPIO $pin to $value.

read_pin($pin)

Returns the value of $pin.