tweak

[web/altusmetrum] / TeleTerra / index.mdwn

diff --git a/TeleTerra/index.mdwn b/TeleTerra/index.mdwn
index 88a73cbeb349f455c6db9488db9c48bade947935..371e0eb55b2ed809f878e15b350faf1522aea40b 100644 (file)
--- a/TeleTerra/index.mdwn
+++ b/TeleTerra/index.mdwn
@@ -4,17 +4,17 @@ This is a hand-held ground station for [TeleMetrum](../TeleMetrum/).
 
 ## Motivation ##
 
-While it is possible to use a partially (or fully!) loaded 
-[TeleMetrum](../TeleMetrum/) board as a USB to RF interface, we think 
-it would be cool to have a nice hand-held ground station we can use in
-full sunlight on the flight line.  If it can help locate the rocket and is
+While using a [TeleDongle](../TeleDongle/) board as a USB to RF interface to 
+a notebook computer works splendidly, we think it would be cool to have a 
+nice hand-held ground station we can use in full sunlight on the flight line.
+If it can help locate the rocket and is
 easy to carry during recovery operations, so much the better!
 
 ## Features ##
 
 ### User View ###
 
-* Hand-held unit about the size of a calculator
+* Hand-held unit about the size of a calculator with 4 line 20 character LCD
 * Antenna for the telemetry stream from [TeleMetrum](../TeleMetrum/)
 * Integrated GPS receiver core to allow display of current user position,
 and relative position of GPS-equipped rockets
@@ -23,27 +23,14 @@ and relative position of GPS-equipped rockets
 
 ### Developer View ###
 
-* Partially populated [TeleMetrum](../TeleMetrum/) board
-       * Serial connector used to attach user interface board
-       * LiPo charge management
-       * Beeper for audible indications
-       * RF section with SMA for external antenna
-       * USB interface
-* New user interface board
-       * [Microchip 16F886](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en530146) Microcontroller
-               * 8k Flash
-               * 386 bytes RAM
-               * I2C target interface
-               * In-circuit programming interface
-               * Serial port
+* Single circuit board
+       * equivalent of a [TeleMetrum](../TeleMetrum/) less the sensors
+       * [Atmel ATtiny48](http://www.atmel.com/dyn/products/product_card_v2.asp?PN=ATtiny48) used as an I/O expander
        * 4 line, 20 character transreflective text LCD display
-       * Switches for scrolling, safe/arm, etc
-       * LEDs to indicate current flight mode, etc
+       * "joystick" switch for user inputs
 * LiPo battery
-* GPS receiver core attached to serial port on new user interface board
 * Software Features (planned)
-       * Written in PIC assembler
-       * Runs from on-chip flash, uses on-chip RAM
+       * [AltOS](../AltOS) for the cc1111 and simple C for the AVR
 * Tools Used
        * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
 * Licenses
@@ -56,6 +43,6 @@ None yet!
 
 ## Artifacts ##
 
-As of 26 April 2009, an incomplete schematic exists at
+A tentative schematic exists at
 [git.gag.com](http://git.gag.com) in the project
 [hw/teleterra](http://git.gag.com/?p=hw/teleterra;a=summary).