driver_MMA845X.c File Reference

Provides init() and read() functions for the MMA845x 3-axis accel family. More...

#include "board.h"
#include "sensor_fusion.h"
#include "sensor_drv.h"
#include "sensor_io_i2c.h"
#include "MMA845x.h"
#include "drivers.h"

Include dependency graph for driver_MMA845X.c:

Go to the source code of this file.

Macros
#define	MMA845x_COUNTSPERG   8192.0
#define	MMA8451_ACCEL_FIFO_SIZE   32

Detailed Description

Provides init() and read() functions for the MMA845x 3-axis accel family.

Supports MMA8451Q, MMA8452Q and MMA8453Q. Key differences which are applicable to this driver are shown in the table below.

Feature	MMA8451Q	MMA8452Q	MMA8453Q
# Bits	14	12	10
FIFO	32-deep	NONE	NONE

All three have the MSB of the result registers located in the same location, so if we read as one 16-bit value, the only thing that should change g/count will be which range (+/- 2/4/8g) we are on.

Definition in file driver_MMA845X.c.

Macro Definition Documentation

MMA8451_ACCEL_FIFO_SIZE

#define MMA8451_ACCEL_FIFO_SIZE   32

Definition at line 32 of file driver_MMA845X.c.

MMA845x_COUNTSPERG

#define MMA845x_COUNTSPERG   8192.0

Definition at line 31 of file driver_MMA845X.c.