NAME

   Device::Chip::NoritakeGU_D - chip driver for Noritake GU-D display
   modules

SYNOPSIS

      use Device::Chip::NoritakeGU_D;

      my $chip = Device::Chip::NoritakeGU_D->new( interface => "UART" );
      $chip->mount( Device::Chip::Adapter::...->new )->get;

      $chip->text( "Hello, world!" )->get;

DESCRIPTION

   This Device::Chip subclass provides communication to a display module
   in the GU-D family by Noritake.

   The reader is presumed to be familiar with the general operation of
   this chip; the documentation here will not attempt to explain or define
   chip-specific concepts or features, only the use of this module to
   access them.

CONSTRUCTOR

new

      $chip = Device::Chip::NoritakeGU_D->new(
         interface => $iface,
         ...
      )

   Constructs a new driver instance for the given interface type. The type
   must be one of UART, I2C or SPI.

METHODS

   The following methods documented with a trailing call to ->get return
   Future instances.

text

      $chip->text( $str )->get

   Draw text at the cursor position.

cursor_left

cursor_right

cursor_home

      $chip->cursor_left->get
      $chip->cursor_right->get

      $chip->cursor_linehome->get

      $chip->cursor_home->get

   Move the cursor left or right one character position, to the beginning
   of the line, or to the home position (top left corner).

cursor_goto

      $chip->cursor_goto( $x, $y )->get

   Moves the cursor to the $x'th column of the $y'th line (zero-indexed).

linefeed

      $chip->linefeed->get

   Move the cursor down to the next line.

clear

      $chip->clear

   Clear the display.

select_window

      $chip->select_window( $win )->get

   Select the main window (when $win is 0), or one of the four numbered
   sub-windows.

initialise

      $chip->initialise

   Reset all settings to their default values.

set_cursor_visible

      $chip->set_cursor_visible( $bool )->get

   Set whether the cursor is visible.

set_brightness

      $chip->set_brightness( $val )->get

   Set the display brightness, from 1 to 8.

set_reverse

      $chip->set_reverse( $bool )->get

   Sets whether subsequent text will be rendered in "reverse video" (clear
   pixels on a set background) effect.

set_write_mixture_display_mode

      $chip->set_write_mixture_display_mode( $mode )->get

   Set the combining mode for newly-added display content. $mode must be
   one of

      set or and xor

set_font_size

      $chip->set_font_size( $size )->get

   Set the font size. $size must be one of

      5x7 8x16

set_font_width

      $chip->set_font_width( $width )->get

   Set the font width. $width must be one of

      fixed fixed2 prop prop2

set_font_magnification

      $chip->set_font_magnification( $xscale, $yscale )->get

   Set the font scaling factor. $xscale must be between 1 to 4, and
   $yscale must be 1 or 2.

realtime_image_display_columns

      $chip->realtime_image_display_columns( @columns )->get

   Sends a bitmapped image to the display, at the cursor position. The
   cursor is not moved.

   @columns should be a list of strings of equal length, containing bytes
   of pixel data to represent each vertical column of the image content.

set_gpio_direction

      $chip->set_gpio_direction( $dir )->get

   Configure the GPIO pins for input or output. $dir is bitmask of four
   bits. Low bits correspond to input, high bits to output.

set_gpio_output

      $chip->set_gpio_output( $value )->get

   Write the value to the GPIO pins.

read_gpio

      $value = $chip->read_gpio->get

   Returns the current state of the GPIO pins.

read_touchswitches

      $switches = $chip->read_touchswitches->get

   Reads the status of the panel touch switches. Returns a hash reference
   whose keys are the names of the touch areas (SW1, SW2, ...) and values
   are booleans indicating whether that area currently detects a touch.

AUTHOR

   Paul Evans <[email protected]>

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