main.cpp

00001 #include "mbed.h"
00002 #include "MMA8451Q.h"
00003 
00004 // define I2C Pins and address for KL25Z. Taken from default sample code.
00005 PinName const SDA = PTE25;
00006 PinName const SCL = PTE24;
00007 #define MMA8451_I2C_ADDRESS (0x1d<<1)
00008 
00009 //serial connection to PC via USB
00010 Serial pc(USBTX, USBRX);
00011 
00012 int main(void)
00013 {
00014     //configure on-board I2C accelerometer on KL25Z
00015     MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS); 
00016     //map read acceleration to PWM output on red status LED
00017     PwmOut rled(LED_RED);
00018     float x,y,z;
00019     while (true) {
00020         float x, y, z;
00021         x = acc.getAccX();
00022         y = acc.getAccY();
00023         z = acc.getAccZ();
00024         wait(0.05f);
00025         pc.printf("%1.2f %1.2f %1.2f\n", x, y, z);
00026     }
00027 }
00028 
00029 
00030 /* *** PROCESSING SKETCH
00031 // Three-axis Graphing sketch
00032 
00033 
00034 // This program takes ASCII-encoded strings containing floating point numbers
00035 // from the serial port at 9600 baud and graphs them. It expects values in the
00036 // range -1.0 to 1.0, followed by a newline, or newline and carriage return
00037 
00038 // Created 20 Apr 2005
00039 // Updated 18 Jan 2008 by Tom Igoe
00040 // Adapted 16 Sep 2014 by Bjoern Hartmann for mbed
00041 // This example code is in the public domain.
00042 
00043 import processing.serial.*;
00044 import java.util.Scanner;
00045 
00046 Serial myPort;        // The serial port
00047 int xPos = 1;         // horizontal position of the graph
00048 float lastX =0.f, lastY=0.f, lastZ=0.f;
00049 float minVal=-1.0;
00050 float maxVal=1.0;
00051 
00052 void setup () {
00053   // set the window size:
00054   size(400, 300);        
00055 
00056   // List all the available serial ports
00057   println(Serial.list());
00058   // Open whatever port is the one you're using.
00059   myPort = new Serial(this, "/dev/tty.usbmodem1412", 9600);
00060   // don't generate a serialEvent() unless you get a newline character:
00061   myPort.bufferUntil('\n');
00062   // set inital background:
00063   background(200);
00064 }
00065 void draw () {
00066   // everything happens in the serialEvent()
00067 }
00068 
00069 void serialEvent (Serial myPort) {
00070   // get the ASCII string:
00071   String inString = myPort.readStringUntil('\n');
00072   
00073   if (inString != null) {
00074     //use the Scanner class to parse 3 floats on a line.
00075     Scanner scanner = new Scanner(inString);
00076     float xAcc=0.0,yAcc=0.0,zAcc=0.0;
00077     try{
00078       xAcc = scanner.nextFloat();
00079       yAcc = scanner.nextFloat();
00080       zAcc = scanner.nextFloat();
00081       
00082     } catch (Exception e) {     
00083       print(e); //InputMismatchException
00084     } 
00085     
00086     //draw x line in red
00087     float xAccScreen = height - map(xAcc, minVal, maxVal, 0, height);
00088     stroke(255,0,0);
00089     line(xPos-1,lastX,xPos,xAccScreen);
00090 
00091     //draw y line in green
00092     float yAccScreen = height - map(yAcc, minVal, maxVal, 0, height);
00093     stroke(0,196,0);
00094     line(xPos-1,lastY,xPos,yAccScreen);
00095 
00096     //draw z line in blue
00097     float zAccScreen = height - map(zAcc, minVal, maxVal, 0, height);
00098     stroke(0,0,255);
00099     line(xPos-1,lastZ,xPos,zAccScreen);
00100 
00101     // at the edge of the screen, go back to the beginning:
00102     if (xPos >= width) {
00103       xPos = 0;
00104       background(200);
00105     } else {
00106       // increment the horizontal position:
00107       xPos++;
00108     }
00109     
00110     lastX = xAccScreen;
00111     lastY = yAccScreen;
00112     lastZ = zAccScreen;
00113     
00114   }
00115 }
00116 */