ST micro LIS3LV02DL accelerometer interfacing


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  1. #1
    Join Date
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    Default ST micro LIS3LV02DL accelerometer interfacing

    hi,

    i am trying to read data from an accelerometer (ST micro LIS3LV02DL) through SPI.
    I used shiftin and shiftout command in picbasic pro but not able to read data. I have read the datasheet quite a few times but not able to get how to use SPI. I am basically confused in using SPI.

    any help is solicited.

    here's the data sheet: http://www.st.com/stonline/products/...e/ds/12094.pdf

    here's my program:

    INCLUDE "modedefs.bas"
    CS VAR PORTB.4
    CLK VAR PORTB.3
    DI VAR PORTB.2
    DO VAR PORTB.2
    BUFF VAR WORD
    ATM CON $32
    MSB CON $AC
    LSB CON $F3

    START
    GOSUB GETDATA
    GOTO START

    GETDATA
    Low CS
    Shiftout DI,CLK,MSBFIRST,[ATM,MSB,LSB]
    Shiftin DO,CLK,MSBPRE,[BUFF]
    High CS
    serout PORTA.2,N2400,[BUFF]
    RETURN
    END

    -Thanks

  2. #2
    skimask's Avatar
    skimask Guest

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    No idea which PIC you're using...therefore no idea if the PIC you are using has any other functions on the PortB pins you are using...

    No colons behind START and GETDATA

  3. #3
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    Default

    There's an SPI example on the meLabs web site.

  4. #4
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    Quote Originally Posted by dhouston View Post
    There's an SPI example on the meLabs web site.
    I have already tried it, not able to complie it, lot's of error

    -Thanks

  5. #5
    skimask's Avatar
    skimask Guest

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    Quote Originally Posted by devil6600 View Post
    I have already tried it, not able to complie it, lot's of error
    -Thanks
    And did you add the colons?
    Or are you using Proton basic?

  6. #6
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    colons are not 100% mandatory, it may work without.

    i would suggest to have a look a the following
    http://www.melabs.com/resources/samples/x1/pbp/spix.bas

    If you receive few compilation error, it's probably because that code above is made for a 16F877x. Grandpa 16F84 have no PORTC, PORTD, PORTE & ADCON1 registers.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

  7. #7
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    Quote Originally Posted by skimask View Post
    No idea which PIC you're using...therefore no idea if the PIC you are using has any other functions on the PortB pins you are using...

    No colons behind START and GETDATA
    I am using 16f84.

    -Thanks

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