The main.cpp program below demonstrates a simple way to interface with the MMA8452 accelerometer. The function reads in the acceleration data in the X, Y, and Z directions and displays them through a serial com port on a PC. The Putty Output figure below shows the output of the accelerometer using Putty. The program also dims or brightens the mbed LEDs 1-3 based on whether or not they are at 'level'( 0 Gs) or above respectively. The video below previews the code in action.
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main.cpp
- Committer:
- Ivannrush
- Date:
- 2014-10-17
- Revision:
- 8:46eab8a51f91
- Parent:
- 6:e3100f66ed6a
File content as of revision 8:46eab8a51f91:
#include "mbed.h" #include "MMA8452.h" //Using MMA8452 accelerometer. SDA on 28, SCL on 27. Writes gravities to the screen. //Also brightens/dims LEDs 1-3 based on whether or not they are 'level'( 0 Gs) Serial pc(USBTX,USBRX); PwmOut led1(LED1); PwmOut led2(LED2); PwmOut led3(LED3); double x, y, z; MMA8452 acc(p28, p27, 100000); int main() { while(1) { acc.readXYZGravity(&x,&y,&z); pc.printf("x:%lf y:%lf z:%lf\r\n",x,y,z); led1 = abs(x); led2 = abs(y); led3 = abs(z); wait(.25); } }