Jisp is a platform independent alternative for John Jabour's ISP program, an InCircuit Serial PIC Programming application for LocoBuffer.
If you have installed Java 1.3, then you'll have Swing, but in addition you may need to install JavaComm. For windows and Linix this is available with Sun.
Programming LocoBuffer via a serial port does not need any special cabling, use a regular modem cable between serial port and LocoBuffer.
Programming LocoIO via a parallel port requires a special (home made)
cable between parallel port and the LocoIO board.
On one side a 25-pin male D-connector is needed for connection to the
parallel port, on the other side 4 wires are connected to JP1 on the LocoIO
board.
The following connections need to be made:
DB25.1 -------------> DB25.10 DB25.5 -------------------------> LocoIO JP1.1 DB25.7 -------------------------> LocoIO JP1.3 DB25.9 -------------------------> LocoIO JP1.33 DB25.18 -------------------------> LocoIO JP1.34 DB25.11 -> 270 Ohm -> DB25.22 DB25.12 -> 270 Ohm -> DB25.22 DB25.13 -> 22 KOhm -> DB25.16 DB25.15 -> 22 KOhm -> DB25.16
Schematics:
DB25 (male) LocoIO JP1
=========== ==========
1
O------------+
14 O |
.---. O |
+-|22K|--O |
| '---' O |
+--------O |
| O |
| O |
| O------------|---------O 1
| O |
| O |
| O |
| O------------|---------O 3
| O |
| O |
| O--------------|---------O 34
| O------------|---------O 33
| O-----------+ |
| O---------|--+
| O .---. |
| O--|270|--+
| O +----. |
| O---|270|-+
| 25 O '---'
| O---------+
| 13 |
| .---. |
+-|22K|--------------+
'---'
Propably the easiest way to make this connection is to sacrifice a 40-lead
flat cable, like the ones used for IDE disks in PC's.
Cut off a piece of about 15 cm with the 40-pin connector.
This connector fits in JP1 of the LocoIO board, but 4 wires (37..40) remain
unused.
Take by preference the side of which wire 1 (pin 1) of the flat cable fits
most easily in pin 1 of JP1 on the LocoIO board
with the cable pointing 'outside' of the LocoIO board.
Wire number 1 is mostly marked contrasting with the rest of wires of the
flat cable.
The other wires are numbered in sequence and correspond to the pin numbering
of JP1 of LocoIO.
Wires 37..40 remain unused.
See this photograph as example of such a connection. This picture shows some extra connections than described above and some LEDs. These are not needed for normal use, I added these for debugging purposes! From top to bottom these are:
red: RB7 green: RB6 red: +5V from LPT port (databit 0) yellow: RB3 red: +5V from LocoIO board (JP1.35/36)
Between this adapter-cable and the parallel port of your system you need another cable. A universal 25-wire one-to-one (flat) cable, 25-pin female on one side and 25-pin male on the other side, will do. Not all wires are required. If you make your own cable make sure at least pins 1, 5, 7, 9, 10, 11, 12, 13, 15, 16, 21 and 22 are wired.
The author does not accept any responsibility for damage to your
equipment!
An alternative is to use a device (adapter) to galvanically separate the parallel port of your computer and LocoIO with opto-couplers. For a possible solution see the S88LPT package on my homepage. Although this adapter was designed for another purpose I have used it successfully to program LocoIO! This adapter could be powered easily by LocoIO.
For more information about parallelport wiring see a
notice of Tomi Engdahl
A great source of information with repect to control of PC ports in
general is the
site of Graig Peacock.
The Jisp executables come in a single ZIP-archive JispXY.ZIP, in which 'X' and 'Y' are version digits. UnZIP the archive in a separate directory. Check the file Packing.Lst if the archive was complete. For your convenience you may add your hex file(s) to this directory too. The Java sources and makefile are packed in file JispSrc.Zip.
Jisp can be started in a number of ways. Its depends on your system environment and personal taste which method will suite you best.
A file 'Jisp.pro' is used to store the user selection of hex file
and port.
The stored values will be used as default selections the next time Jisp is
started.
This simplifies batch-like updating of multiple LocoIO boards, especially
when the hex file is not in the current directory.
Note: Although the fully qualified name of the hex file is stored and
used, only the simple <filename.ext> is shown in the dialog window as
default selection.
The optional Jisp log may be useful when you are interested in the details of the transfer of the hex file to LocoBuffer or LocoIO. The log shows address, opcode, data (if applicable) and a brief description.
None.
None.
No reports received yet.
No reports received yet.
Jisp works for me on a PC with Pentium-III 450 MHz with OS/2 Warp 4 and
Java 1.1.8 with the Java extensions Swing and JavaComm.
Jisp is the first Java program I ever published, it is not necessarily a
good example!
Bob Jacobson for the initial design of the graphical user interface.
Please report (to me privately or in LocoNet_Hackers mailing list) in which environment you used Jisp (un)succesfully. Send bug reports or detailed comments per E-mail to the author of Jisp.
Version
