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[Paparazzi-devel] embedded controller

From: nisma
Subject: [Paparazzi-devel] embedded controller
Date: Wed, 5 May 2004 11:21:44 +0200 (MEST)

Hi, i have found my fly controller MCU and cheap base station.

It's equipped with one 32 bit H8 processor and atmel 4MH coprocessor.
Integrated RF link 300 mt (30 mW,900 MH range, cheap and legal RX amplifier
are available). 19200 KBS.
To enhanche the simple anntenna, use cellular antennas (directional for the
base station).
the price is 90$.
Free developement environment (windoz/linux)
Nice keyboard for operation entry, usb communication to optional laptop,
ability to display BW live video (digicam) in background.
24 pin external HW interface 

I try to using a cheap MCU
for the external analog/digital interfaces and interfacing it to this
controller. The MCU (TI 430 having 14 or 16 bit internal AD converter and
two true AD) can be used to acknowlege the i2c display if a
i2c display was used. I plann to remove it from the flight device. 
Digital cameras can be interfaced directly to the 24 pin extension header
without additional electronic. With the memory, visual horizont sensing
and height estimation or visual attitude stabilizing can be implemented.

Considering using cheap digital color VGA cameras (compressed jpeg output)
20$ end user price, the overall price is lower than other solutions.

Some datasheet informations:

Main Processor Hitachi H8S/2323 18MHz
Coprocessor Atmel AT90S2313 4MHz
Parallel read-only flash 512Kb
Disk (electronic RAM-Disk) 500Kb
RAM 1.5Mb (2Mb in total)
LCD Grayscale screen 160x100 pixels, 54x35 mm
RF transceiver RF2915
Expansion cartridge slot 24-pin proprietary (documented)
PC/charging unit connection socket USB
Size 81 mm x 141mm x 19mm (3.2" x 5.6" x 0.8")
Weight 150 g


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