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     
00017     float x;
00018     
00019     while (true) {
00020         x = acc.getAccX(); //get acceleration
00021         pc.printf("%1.2f\n", x); //print ascii-encoded float to serial port
00022         wait(0.05f); // wait 50ms (20Hz update rate)
00023     }
00024 }
00025 
00026 /*
00027 // Graphing sketch for Processing
00028 
00029 
00030 // This program takes ASCII-encoded strings containing floating point numbers
00031 // from the serial port at 9600 baud and graphs them. It expects values in the
00032 // range -1.0 to 1.0, followed by a newline, or newline and carriage return
00033 
00034 // Created 20 Apr 2005
00035 // Updated 18 Jan 2008 by Tom Igoe
00036 // Adapted 16 Sep 2014 by Bjoern Hartmann for mbed
00037 // This example code is in the public domain.
00038 
00039 import processing.serial.*;
00040 
00041 Serial myPort;        // The serial port
00042 int xPos = 1;         // horizontal position of the graph
00043 
00044 float minVal=-1.0;
00045 float maxVal=1.0;
00046 
00047 void setup () {
00048   // set the window size:
00049   size(400, 300);        
00050 
00051   // List all the available serial ports
00052   println(Serial.list());
00053   // Open whatever port is the one you're using.
00054   myPort = new Serial(this, "/dev/tty.usbmodem1412", 9600);
00055   // don't generate a serialEvent() unless you get a newline character:
00056   myPort.bufferUntil('\n');
00057   // set inital background:
00058   background(0);
00059 }
00060 void draw () {
00061   // everything happens in the serialEvent()
00062 }
00063 
00064 void serialEvent (Serial myPort) {
00065   // get the ASCII string:
00066   String inString = myPort.readStringUntil('\n');
00067 
00068   if (inString != null) {
00069     // trim off any whitespace:
00070     inString = trim(inString);
00071     // convert to an int and map to the screen height:
00072     float inFloat = float(inString); 
00073     float screenY = map(inFloat, minVal, maxVal, 0, height);
00074 
00075     // draw the line from bottom of screen to desired height
00076     stroke(127, 34, 255);
00077     line(xPos, height, xPos, height - screenY);
00078 
00079     // at the edge of the screen, go back to the beginning:
00080     if (xPos >= width) {
00081       xPos = 0;
00082       background(0);
00083     } else {
00084       // increment the horizontal position:
00085       xPos++;
00086     }
00087   }
00088 }
00089 */