MMA7660

Library for controlling accelerometer MMA7660 with the Beaglebone Black's I2C's pins.
This library can be used for tap detection, shake detection and orientation detection. Datasheet is available here

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API

MMA7660(i2c_no)

Creates an instance of the class MMA7660 i2c_no can be 1 or 2 based on the i2c bus used

MMA7660.getX()

Returns the value of X dimension. Value of X can be from -31 to 32

MMA7660.getY()

Returns the value of Y dimension. Value of Y can be from -31 to 32

MMA7660.getZ()

Returns the value of Z dimension. Value of Z can be from -31 to 32

MMA7660.getXYZ()

Returns a list of X,Y and Z dimension values. Values of X, Y and Z can be from -31 to 32

MMA7660.setInterrupt(configuration, interrupt_pin, callback_funtion)

Sets interrupt on interrupt_pin and calls callback_funtion when interrupt occurs

configuration :
INT_FB - Front/Back position change causes an interrupt
INT_PL - Up/Down/Right/Left position change causes interrupt
INT_PD - Successful tap detection causes an interrupt
INT_SHX - Shake detected on the X-axis causes an interrupt
INT_SHY - Shake detected on the Y-axis causes an interrupt
INT_SHZ - Shake detected on the Z-axis causes an interrupt

######callback_funtion : has to take(back_front, portrait_landscape, tap, shake) as parameters.
back_front = 1 - Front: Equipment is lying on its front
back_front = 2 - Back: Equipment is lying on its back

portrait_landscape = 1 - Left: Equipment is in landscape mode to the left
portrait_landscape = 2 - Right: Equipment is in landscape mode to the right
portrait_landscape = 5 - Down: Equipment standing vertically in inverted orientation
portrait_landscape = 6 - Up: Equipment standing vertically in normal orientation

tap = 0 - Tap Not Detected
tap = 1 - Tap Detected

shake = 0 - Shake Not Detected
shake = 1 - Shake Detected

MMA7660.settapthreshold(value)

sets tap detection threshold Tap detection threshold = +/-value counts

MMA7660.settiltfilter(value)

Sets the rate of tilt debounce filtering When value = 0 - Tilt debounce filtering is disabled. For other values, value number of samples have to match before the device updates portrait/ landscape data.

MMA7660.setTapDebounce(value)

Sets the tap detection debounce filtering to value The tap detection debounce filtering requires value adjacent tap detection tests to be the same to trigger a tap event

MMA7660.getOrientation()

returns a list with the back_front and portrait_landscape data.

back_front = 1 - Front: Equipment is lying on its front back_front = 2 - Back: Equipment is lying on its back

portrait_landscape = 1 - Left: Equipment is in landscape mode to the left portrait_landscape = 2 - Right: Equipment is in landscape mode to the right portrait_landscape = 5 - Down: Equipment standing vertically in inverted orientation portrait_landscape = 6 - Up: Equipment standing vertically in normal orientation

MMA7660.removeInterrupt()

Detaches the interrupt

MMA7660.close()

sets the device in standby mode and closes the connection to the device.