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A Multifunction, VME-Based I/O Controller with 32 Programmable Channels of Analog to Digital Conversion for an Unmanned Aerial Vehicle
Final rept. 1 Jan-1 Sep 1992
WRIGHT LAB WRIGHT-PATTERSON AFB OH
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Faster, more powerful processors are being incorporated into embedded computer system to execute increasingly complicated algorithms in real time resulting in a need to transfer more data between the embedded computer and external sensors and servos at a faster rate. To meet these real time requirements, while decreasing the size of the embedded computer hardware, a multifunction, VME-based IO controller and AD conversion system was designed, developed, and tested which controls 16 channels of pulse width modulated output, 32 single-ended input channels of AD conversion with programmable gain and offset capability, and 8 discrete output channels on a single, 6U Versa Module VME card. The system is controlled by the Motorola IC68332 32-bit microcontroller and performs 32 channel AD conversion to be integrated rate and 16 channels of PWM at a better than 50 Hz rate. This 10 system was specifically designed to be integrated into the flight control computer of an research vehicle and pushes state-of-the-air in functionality for real-time, embedded VME-based IO system.
APPROVED FOR PUBLIC RELEASE