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|
#########################################################################################
# Package HiPi::Interface::SerLCD
# Description : SerLCD RX Enabled LCD Controller
# Copyright : Copyright (c) 2013-2017 Mark Dootson
# License : This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
#########################################################################################
package HiPi::Interface::SerLCD;
#########################################################################################
use strict;
use warnings;
use parent qw( HiPi::Interface::Common::HD44780 );
use Carp;
use HiPi qw( :lcd );
our $VERSION ='0.81';
sub new {
my ($class, %userparams) = @_;
my %params = (
# standard device
devicename => '/dev/ttyAMA0',
# serial port
baudrate => 9600,
parity => 'none',
stopbits => 1,
databits => 8,
# LCD
width => undef,
lines => undef,
backlightcontrol => 0,
device => undef,
positionmap => undef,
serialbuffermode => 1,
);
# get user params
foreach my $key( keys (%userparams) ) {
$params{$key} = $userparams{$key};
}
unless( defined($params{device}) ) {
my %portparams;
for (qw( devicename baudrate parity stopbits databits ) ) {
$portparams{$_} = $params{$_};
}
require HiPi::Device::SerialPort;
$params{device} = HiPi::Device::SerialPort->new(%portparams);
}
my $self = $class->SUPER::new(%params);
return $self;
}
sub send_text {
my($self, $text) = @_;
$self->device->write( $text );
}
sub send_command {
my($self, $command) = @_;
$self->device->write( SLCD_START_COMMAND . chr($command) );
}
sub send_special_command {
my($self, $command) = @_;
$self->device->write( SLCD_SPECIAL_COMMAND . chr($command) );
}
sub backlight {
my($self, $brightness) = @_;
$brightness = 0 if $brightness < 0;
$brightness = 100 if $brightness > 100;
# input $brightness = 0 to 100
#
# SerLCD uses a 30 range value 128 - 157
# to control brightness level
return unless ($self->backlightcontrol);
my $level;
if( $brightness == 0 ) {
$level = 128;
} elsif( $brightness == 1 ) {
$level = 129;
} elsif( $brightness == 100 ) {
$level = 157;
} else {
$level = int( 128.5 + ( ( $brightness / 100 ) * 30 ) );
$level = 129 if $level < 129;
}
$level = 157 if $level > 157;
$self->send_special_command( $level );
}
sub update_baudrate {
my $self = shift;
my $baud = $self->device->baudrate;
my $bflag;
if ($baud == 2400) {
$bflag = 11;
} elsif ($baud == 4800) {
$bflag = 12;
} elsif ($baud == 9600) {
$bflag = 13;
} elsif ($baud == 14400) {
$bflag = 14;
} elsif ($baud == 19200) {
$bflag = 15;
} elsif ($baud == 38400) {
$bflag = 16;
} else {
croak(qq(The baudrate of the serial device is not supported by the LCD controller));
}
$self->send_special_command( $bflag );
}
sub update_geometry {
my $self = shift;
if($self->width == 20) {
$self->send_special_command( 3 );
}
if($self->width == 16) {
$self->send_special_command( 4 );
}
if($self->lines == 4) {
$self->send_special_command( 5 );
}
if($self->lines == 2) {
$self->send_special_command( 6 );
}
if($self->lines == 1) {
$self->send_special_command( 7 );
}
}
sub enable_backlight {
my($self, $flag) = @_;
$flag = 1 if !defined($flag);
if( $flag ) {
$self->send_special_command( 1 );
} else {
$self->send_special_command( 2 );
}
}
sub toggle_splashscreen {
$_[0]->send_special_command( 9 );
}
sub init_lcd {
$_[0]->send_special_command( 8 );
}
sub set_splashscreen {
$_[0]->send_special_command( 10 );
}
1;
__END__
|
