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Microchip dsPIC Digital Signal Controllers Senior Design Project 2005 Super-Mileage Fuel Injection Team Micro-Controllers In Our Project (I) We will require a primary processor to implement our feedback control system.

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microchip dspic digital signal controllers

Microchip dsPIC Digital Signal Controllers

Senior Design Project 2005

Super-Mileage Fuel Injection Team

micro controllers in our project i
Micro-Controllers In Our Project (I)
  • We will require a primary processor to implement our feedback control system.
  • It will need to have a timed logical output triggered by a system interrupt of our choice.
  • It will need to perform certain math operations in hardware and with few instructions.
  • Development Options must include high level language compilers.
  • Programming options must include a portable PC-Controlled Option.
micro controllers in our project ii
Micro-Controllers In Our Project (II)
  • We will also require a microcontroller to control a data storage and retrieval scheme.
  • It must have a sufficient number of output pins to send and receive data from memory as well as address a virtual memory space of our chosen size.
what are the options
What are the Options?
  • Feedback Control System
    • Motorola DSP56xxx series
    • Microchip dsPIC series
    • Amtel, Analog Devices, Others
  • Why DSP anyway? Benefits? Pitfalls?
    • Higher operand bit count, greater precision in calculations
    • Does the math operations of interest in a single instruction
    • Higher potential clock speed
    • C Compilers Available
    • Might require us to purchase some new programming hardware
what if we used a lower end controller
What if we used a lower end controller?
  • Microchip 16 and 18 series as example

-No implementation of certain math apps

-Higher level language use is more limited

-Iterative calculation strategy

-Limited Program Memory

  • However, 16/18 series or equivalent will be adequate for our sensor data recording system
    • Only needs to implement data collection, storage, retrieval, and download to a PC via a serial connection
the pitch
The Pitch
  • The Front Runner: Microchip dsPIC series

-Three families: Electronic Motor Control, Sensor Family, General Purpose Family

  • Benefits
    • Uses the same assembly language we are all familiar with from undergrad courses
    • Implements necessary math
    • One-shot PWM with interrupt triggering
    • In-Circuit-Serial-Programming