Diff: main.cpp

Revision:

0:c9bb3c9d5ce8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Sep 17 07:59:48 2014 +0000
@@ -0,0 +1,89 @@
+#include "mbed.h"
+#include "MMA8451Q.h"
+
+// define I2C Pins and address for KL25Z. Taken from default sample code.
+PinName const SDA = PTE25;
+PinName const SCL = PTE24;
+#define MMA8451_I2C_ADDRESS (0x1d<<1)
+
+//serial connection to PC via USB
+Serial pc(USBTX, USBRX);
+
+int main(void)
+{
+    //configure on-board I2C accelerometer on KL25Z
+    MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
+    
+    float x;
+    
+    while (true) {
+        x = acc.getAccX(); //get acceleration
+        pc.printf("%1.2f\n", x); //print ascii-encoded float to serial port
+        wait(0.05f); // wait 50ms (20Hz update rate)
+    }
+}
+
+/*
+// Graphing sketch for Processing
+
+
+// This program takes ASCII-encoded strings containing floating point numbers
+// from the serial port at 9600 baud and graphs them. It expects values in the
+// range -1.0 to 1.0, followed by a newline, or newline and carriage return
+
+// Created 20 Apr 2005
+// Updated 18 Jan 2008 by Tom Igoe
+// Adapted 16 Sep 2014 by Bjoern Hartmann for mbed
+// This example code is in the public domain.
+
+import processing.serial.*;
+
+Serial myPort;        // The serial port
+int xPos = 1;         // horizontal position of the graph
+
+float minVal=-1.0;
+float maxVal=1.0;
+
+void setup () {
+  // set the window size:
+  size(400, 300);        
+
+  // List all the available serial ports
+  println(Serial.list());
+  // Open whatever port is the one you're using.
+  myPort = new Serial(this, "/dev/tty.usbmodem1412", 9600);
+  // don't generate a serialEvent() unless you get a newline character:
+  myPort.bufferUntil('\n');
+  // set inital background:
+  background(0);
+}
+void draw () {
+  // everything happens in the serialEvent()
+}
+
+void serialEvent (Serial myPort) {
+  // get the ASCII string:
+  String inString = myPort.readStringUntil('\n');
+
+  if (inString != null) {
+    // trim off any whitespace:
+    inString = trim(inString);
+    // convert to an int and map to the screen height:
+    float inFloat = float(inString); 
+    float screenY = map(inFloat, minVal, maxVal, 0, height);
+
+    // draw the line from bottom of screen to desired height
+    stroke(127, 34, 255);
+    line(xPos, height, xPos, height - screenY);
+
+    // at the edge of the screen, go back to the beginning:
+    if (xPos >= width) {
+      xPos = 0;
+      background(0);
+    } else {
+      // increment the horizontal position:
+      xPos++;
+    }
+  }
+}
+*/