Dedicated microprocessor systems find increasing applications in automobile instrumentation. Fuel injection systems, digital radio tuners and similar applications employing the microcontroller have become common place. This paper describes a cost effective microcontroller implementation of an automobile instrument cluster by the COPSTM group of National Semiconductor, Santa Clara. The instrument cluster provides a vacuum fluorescent display of the vehicle speed, engine RPM, odometers, battery voltage, engine oil pressure and the fuel level. A modular design involving a single microcontroller in conjunction with peripherals to aid in data acquisition from the transducers allows the quantities to be computed with high accuracies and displayed on a real time basis. The single microcontroller environment places severe restrictions on the availability of RAM and ROM. Coupled with the requirement of real time operation the application poses a non trivial challenge. A non volatile RAM accumulates the mileage covered. Hamming code techniques ensure the integrity of the data contained in the non volatile memory. Inclusion of diagnostics allows a rapid and thorough check against improper operation of the microcontroller, peripherals and the nonvolatile memory. This paper describes the implementation with a COP 444L containing 128 nybbles of RAM and 2K bytes of ROM. A display updation rate of 16 Hz can be comfortably realized.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Cost Effective Microcontroller Based Automobile Instrument Cluster


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE International Congress and Exposition ; 1983



    Erscheinungsdatum :

    01.02.1983




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Single chip microcontroller simplifies automobile instrument cluster

    Velamuri,R. / Aleaf,A.H. / National Semiconductor,US | Kraftfahrwesen | 1988


    Cost effective LIN bus automotive networking microcontroller

    Bender,M. / Melexis,DE | Kraftfahrwesen | 2004


    Cost Effective LIN Bus Automotive Networking Microcontroller

    Bender, Michael | SAE Technical Papers | 2004


    Cost Effective LIN Bus Automotive Networkinq Microcontroller

    Bender, M. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Cost Effective Input Circuitry for Texas Instruments TMS370 Microcontroller Family

    Maples, David T. / Stewart, Michael S. | SAE Technical Papers | 1996