Reprogramming the Javelin Stamp over the air
Harold
Posts: 8
Hi all.
I am considering using the Javelin Stamp for an application and was wondering how the system goes about executing/interpreting its code. The application this stamp would be used for would have the device in remote locations in contact with a base station via long range RF modems. What I would like to be able to do is update the application over the air (i.e.) send it updates or an entire new program. So the question is, is there a way to do this. Does the Java VM look to a file type system to run the Java code or is the code burned to a EEPROM and a interrupt vector points to the start of the code? I hope this makes sense. Thanks in advance for any and all help.
Harold Kimball
I am considering using the Javelin Stamp for an application and was wondering how the system goes about executing/interpreting its code. The application this stamp would be used for would have the device in remote locations in contact with a base station via long range RF modems. What I would like to be able to do is update the application over the air (i.e.) send it updates or an entire new program. So the question is, is there a way to do this. Does the Java VM look to a file type system to run the Java code or is the code burned to a EEPROM and a interrupt vector points to the start of the code? I hope this makes sense. Thanks in advance for any and all help.
Harold Kimball
Comments
The javelin requires 3 signals to be programmed: TX, RX and ATN and there
is a tight timing requirement for the ATN assertion, followed by downloading
the code into the javelin eeprom. And don't forget the echo on the rx line.
A better approach is to have a local pc that can receive program updates via RF
and then let the pc reprogram the javelin. You·need·a program to receive files
and commands via RF.
regards peter
·
http://www.rentron.com/PicBasic/wireless.htm
Going through the modem's manual, it is not possible to set 28800 baud
which is required for the javelin. Too bad.
regards peter
Post Edited (Peter Verkaik) : 11/9/2007 4:30:46 PM GMT