Well over the christmas break I decided to work on my xpl osd project. At this point I could sent a text message with row and column information. Now I have incorporated alert information , heart beat generation and device instance reconfiguration. On several occasions when I thought im almost there I would run into problems with memory on the pic16f876 . I then would have to relocate some code to a different page in memory, take care of paging and then debug , this was time consuming but rewarding...

Im using several lookup tables in my pic program . One is for checking the received xpl message (checked character by character) and the others are for transmitting my different xpl message responses....
Coding and testing has been made a lot easier this time as the xPL guys have developed a program to send xpl messages and build scripts for all sorts of things. Even has a Script Builder to assist you ..........check it out .The xpl guys are very helpful

http://www.xplproject.org.uk/

To Do.....
Still have to incorporate the heart beat interval into my reconfiguration . Also need to somehow try and make my program bullet proof . My tables are in program memory and I need to ensure if I have a bug or a glitch that my pic doesnt start writing over itself... Once this is done some more testing then build another unit for Steve to test......
More Soon
Some Pics

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