Library for driving the MMA8452 accelerometer over I2C
Dependents: MMA8452_Test MMA8452_Demo Dualing_Tanks IMU-Controlled_MP3_Player ... more
Here is a simple example:
#include "mbed.h" #include "MMA8452.h" int main() { Serial pc(USBTX,USBRX); pc.baud(115200); double x = 0, y = 0, z = 0; MMA8452 acc(p28, p27, 40000); acc.setBitDepth(MMA8452::BIT_DEPTH_12); acc.setDynamicRange(MMA8452::DYNAMIC_RANGE_4G); acc.setDataRate(MMA8452::RATE_100); while(1) { if(!acc.isXYZReady()) { wait(0.01); continue; } acc.readXYZGravity(&x,&y,&z); pc.printf("Gravities: %lf %lf %lf\r\n",x,y,z); } }
An easy way to test that this actually works is to run the loop above and hold the MMA8452 parallel to the ground along the respective axis (and upsidedown in each axis). You will see 1G on the respective axis and 0G on the others.
Diff: MMA8452.cpp
- Revision:
- 14:0602b45ca70f
- Parent:
- 13:4bd8b4cd479d
- Child:
- 16:d6dde2318edc
diff -r 4bd8b4cd479d -r 0602b45ca70f MMA8452.cpp --- a/MMA8452.cpp Wed Mar 05 15:04:13 2014 +0000 +++ b/MMA8452.cpp Wed Mar 05 15:09:21 2014 +0000 @@ -1,4 +1,4 @@ -// Author: Nicholas Herriot, Ashley Mills +// Authors: Ashley Mills, Nicholas Herriot /* Copyright (c) 2013 Vodafone, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software