MMA7660 sample code?

VonSzarvas · 2012-05-22 05:54

Anyone got the MMA7660 sensor working with the Propeller ?

Looking for some sample code... can be SPIN, PASM, PropBasic!, or even SX/B or some other B-Stamp format. I would be converting to PropBasic, so will publish the code back here when working unless someone has beaten me to it?

Thanks for any help.

Peter Jakacki · 2012-05-28 20:52

Sorry, I have only just come across your post. I have the MMA7660 working under Propforth 4.6 but it should be straightforward to convert to Spin etc.

hex
\ MMA7660 Accelerometer code
\ Using Propforth 4.6

: @I2C    \ ( device -- ) \ Select device
    i2cstart i2cwrite drop ;

: @ACC    \ ( reg -- ) Select Register
    98 @I2C i2cwrite drop ;

: ACC!    \ ( data reg -- ) Write Register
    @ACC i2cwrite drop i2cstop ;

: ACC@       \ ( reg -- dat ) Read Register  
    @ACC 99 @I2C 1 i2cread i2cstop ;

: XYZ@      \ ( -- long ) Read first four registers as a long  
    0 @ACC 99 @I2C 0 i2cread 0 i2cread 0 i2cread 1 i2cread i2cstop
        18 lshift swap 10 lshift + swap 8 lshift + + ;

: !ACC      \ Init the Accelerometer   
    i2cstop 0 7 ACC! 0 5 ACC! 10 6 ACC! 34 8 ACC! e0 9 ACC!  62 8 ACC! 0 A ACC! 41 7 ACC! ;

\ List the accelerometer registers
: SHOW       0 @ACC 99 @I2C hex 0b 0 do i 0a = i2cread .byte 20 emit loop i2cstop ;

VonSzarvas · 2012-05-29 03:42

Thank you Peter.

Have it solved now.. Very nice to see the readings for shake and orientation working correctly! I will experiment a bit more with making sense of the acceleration data (as I wish to provide a record of movement along a plane, and I think that would also be useful for others), then I will clean up and post the code.

MMA7660 sample code?

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