		DATATRAK BETA VERSION INSTRUCTIONS

Revision history
	data_trak3  	11/8/2004	1st beta release
	data_trak31	11/20/2004	fixed CD indication

This software is written for the PIC 16F628 micro. It will not fit into the 1k 627 chip. It is meant to be a application specific replacement for the stock PIC that comes with the TinyTrak encoder. Uses include sending serial data via packet radio that your own micro projects may produce.
Both the .ASM and .HEX files are included. The ASM file must be compiled using MPLAB and is included for users who wish to see how the program works and perhaps offer suggestions and/or improvements.
The firmware is designed to receive serial data at 9600 baud 8 bit no parity. When it sees a carriage return or has filled it's 150 byte buffer the data is sent to the radio in AX.25 unconnected protocall format at 1200 baud.

Configuration:
Powering the TinyTrak up with J5 shorted invokes the configure menu. As with the normal TinyTrak configuration, a null modem adaptor is required to connect to the computer.
The computer terminal program should be set for 9600-8-1 no handshaking.
The screenshot on the webpage shows what the menu looks like when completed. It will ask for the callsigns one at a time. Enter them as you would a TNC using capital letters i.e (MYCALL or MYCALL-8, etc). Pressing the <ENTER> key submits the data.
You can backspace and edit your entry prior to entering it.
There are up to three digipeater entries availible. These are optional and pressing <ENTER> without any data will skip ahead to the TXDELAY entry.
The TXDelay is the number of flags sent before the data. It figures out to 6.67 mS per count. A 300 mS TXD corresponds to an entry of 45.
The last item is the text echo feature. When selected, serial data received by the TinyTrak is echoed back to the terminal much like a TNC with ECHO ON. This is nice for testing and when your using it with a computer. Select it by typing a capital Y when asked. Any other entry will turn it off.
You should now see the "successful configuration" message. Remove J5 jumper and power.
The next time the unit is powered up, it will be in transmit mode, waiting for data.

Busy channel detect works much the same as with the stock software. With the TinyTrak in transmit mode, open the squelch of the radio and adjust R9 for CD on and see that CD goes dark when the squelch is closed. As the software is different, this may need to be adjusted from the stock setting when using Byonics firmware. The CD lights
dimly when active - this is normal.

Transmit deviation should be set with the stock TinyTrak configuration software.

There is no MIC PTT sense on this model. It will simply assert the PTT when it transmits data.

As this is presently BETA software, please send bugs and other useful info to my email address at the bottom of the document.

Good luck and 73
Mike Berg N0QBH
mikeberg@ringolake.com