gen
4 Display Module Series gen4-uLCD-24PT - 2.4”
©
2017 4D SYSTEMS Page 9 of 22 www.4dsystems.com.au
5.
Module Features
The gen4 series of Integrated Display Modules are
designed to accommodate most applications. Some
of the main features of the module are listed below.
5.1.
Picaso Processor
The module is designed around the Picaso Graphics
Controller from 4D-Labs.
The Picaso is a smart Controller and the interface to
the TFT- LCD displays is almost plug-n-play.
All of the data and control signals are provided by the
chip to interface directly to the display.
Powerful graphics, text, image, animation and
countless more features are built right inside the
chip.
The data sheet for the processor is available from the
“Picaso Processor Datasheet”
5.2.
Audio
Audio playback support in the Picaso Processor
enables this module to play audio WAV files stored in
the micro-SD memory card. PWM audio is generated
and made available on the AUDIO pin of the 30 way
ZIF connector, ready to interface with an audio
amplifier on your application board.
A simple instruction enables the user to
play/pause/stop audio files while continuing the
execution of the user application code, such as
display updates, touch recognition, communications,
etc. The audio system also allows real time pitch
change of audio samples.
For a complete list of audio commands please refer
to the separate document titled:
“Picaso 4DGL Internal Functions”
5.3.
SD/SDHC Memory Cards
The module supports micro-SD memory cards via the
on-board latch type micro-SD connector. The
memory card is used for all
multimedia file retrieval such as
images, animations and movie clips.
The memory card can also be used
as general purpose storage for data logging
applications. Support is available for off-the-shelf
micro-SD (< 4GB) and high capacity HC memory cards
(4GB and above). Memory cards up to 32GB is size
can be used, however it must be noted that only a
portion of this can be utilised by the FAT16 file
system. See section below for more details.
Note: A microSD card capable of SPI is a requirement
for all 4D Systems’ display modules powered by
Goldelox, Picaso or Diablo16 Processors. If a non-SPI
compatible card is used, it will simply fail to mount,
or may cause intermittent issues resulting in lock ups
and crashing of the application. Please refer to the
4D Systems website for microSD cards offered by 4D
Systems.
5.4.
FAT16
All 4D Systems display modules featuring 4D Labs
processors
use
off-the-shelf
standard
SDHC/SD/micro-SD memory cards (SPI Compatible
Only) with up to 4GB capacity usable with FAT16
formatting.
For any FAT file related operations, before the
memory card can be used it must first be formatted
correctly. Built into Workshop4 is a tool created by
4D, called RMPET (please refer to the Tools menu, in
any Environment, inside the Workshop4 IDE). RMPET
allows the User to easily partition and format
microSD cards, to make their file system ready to be
used with 4D Systems modules. The formatting of the
card can be done on any PC system with a card
reader.
The Picaso Processor also supports high capacity HC
memory cards (4GB and above). The available
capacity of SD-HC cards varies according to the way
the card is partitioned and the commands used to
access it. Refer to the 4D Systems RMPET tool in the
Workshop4 IDE.
A Max of 4GB can be utilised by the FAT16 file
system. The FAT partition is always first (if it exists).
Any space larger than 4GB will be RAW, and can still
be utilised by your 4D Systems module, using
different functions. Please refer to Application Notes.
