PICASO datasheet(12/24 Pages) ETC2

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4D SYSTEMS

PICASO Processor

Page 12 of 23

www.4dsystems.com.au

6. 4DGL - Software Language

The PICASO processor belongs to a family of

processors powered by a highly optimised soft

core virtual engine, EVE (Extensible Virtual Engine).

EVE is a proprietary, high performance virtual-

machine with an extensive byte-code instruction

set optimised to execute compiled 4DGL

programs. 4DGL (4D Graphics Language) was

specifically developed from ground up for the EVE

engine core. It is a high level language which is

easy to learn and simple to understand yet

powerful enough to tackle many embedded

graphics applications.

4DGL is a graphics oriented language allowing

rapid application development, and the syntax

structure was designed using elements of popular

languages such as C, Basic, Pascal and others.

Programmers familiar with these languages will

feel right at home with 4DGL. It includes many

familiar instructions such as IF..ELSE..ENDIF,

WHILE..WEND, REPEAT..UNTIL, GOSUB..ENDSUB,

GOTO, PRINT as well as some specialised

instructions

SERIN,

SEROUT,

GFX_LINE,

GFX_CIRCLE and many more.

For detailed information pertaining to the 4DGL

language, please refer to the following documents:

“4DGL-Programmers-Reference-Manual.pdf”

“PICASO-4DGL-Internal-Functions.pdf”

To assist with the development of 4DGL

applications, the Workshop 4 IDE combines a full-

featured editor, a compiler, a linker and a

downloader into a single PC-based application. It's

all you need to code, test and run your

applications.

7. In Circuit Serial Programming ICSP

The PICASO processor is a custom graphics

processor. All functionality including the high level

commands are built into the chip. This chip level

configuration is available as a Firmware/PmmC

(Personality-module-micro-Code) file.

A PmmC file contains all of the low level micro-

code information (analogy of that of a soft silicon)

which define the characteristics and functionality

of the device. The ability of programming the

device with a PmmC file provides an extremely

flexible method of customising as well as

upgrading it with future enhancements.

A PmmC file can only be programmed into the

device via its COM0 serial port and an access to

this must be provided for on the target application

board. This is referred to as In Circuit Serial

Programming (ICSP). Figure below provides a

typical implementation for the ICSP interface.

The PmmC file is programmed into the device with

the aid of Workshop 4, the 4D Systems IDE

software (See Section 12). To provide a link

between the PC and the ICSP interface, a specific

4D Programming Cable is required and is available

from 4D Systems.

Using a non-4D programming interface could

damage your processor, and void your Warranty.

Note: The PICASO processor is shipped blank and

it must be programmed with the PmmC

configuration file.

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