Purpose is to realize a very compact card allowing the developmen
of applications real-time FORTH associated to peripherals configurables
by using a host computer (PC, MAC or the other one) as mass memory.
The main characteristics of this card are the following ones:
- an optimized
RISC FORTH processor running at 25 MHZ integrated in a FPGA,
- A FLASH ROM of 1 MegaBytes containing a FORTH kernel (with
obviously interpreter and compiler), a real-time kernel features
of which are described in this site, with it more an available
space important for different embarked applications,
- A RAM of 1 very widely sufficient MegaBytes for the mos
part of applications,
- A clock for the real-time kernel (1 ms), an interface
RS232 for the dialogue with the host computer and various peripherals
which will be adapted to various applications (FPGA allows it),
- A supplementary 512 KiloBytes RAM
being able to be connected to the FPGA according to need.
The FPGA code is contained in a 1 MegaBits EEPROM of the
The configuration tooms (software with specific cable connectable
in the PC parallel port) are described in its site (to see documentation
corresponding to the AT17V010).
The ROM is used only at the time of the initialization,
its program is then downloaded in the RAM in superior performances.
Software discovers automatically if an application is accommodated
in this ROM and, if it is case, loads this application and executes
it. This allows at your choice to work in a autonomous way while
keeping the possibility of putting into dialogue with the hosy
computer for the parameters monitoring for example.
Dialogue with the card makes by using a terminal window
VTxxx of the host computer at 9600 bauds. Software packages application
can be downloaded by using the XMODEM protocol.