Optical Finger Navigation (OFN) - Parallax OFN module 27903

Page last updated 09 Mar 2015, by Neha Kadam. 0 replies ofn. optical, parallax

/media/uploads/nkadam/27903.png
Parallax Optical Finger Navigation Module 27903

Overview

Library and demo code for driving the Parallax OFN module 27903 via I2C. The datasheet for the module is available here.

Contributed by Guru Das Srinagesh and Neha Kadam.

Connections

Here is the wiring diagram for the demo code:

mbedOFN
p9SDA
p10CLK
VUVdd
GNDGND

When connecting Vdd and GND, make sure to connect the outermost pins as shown below:

/media/uploads/nkadam/20150308_144213.jpg

The default X and Y orientation with respect to the image above is as follows:

  • Left is -ve X axis; Right is +ve X axis
  • Top is +ve Y axis; Bottom is -ve Y axis


Here is the demo for the Hello_World program. It displays the X and Y displacement and Orientation of the module.



main.cpp

#include "ofn.h"

OFN ofn(p9, p10);
Serial pc(USBTX, USBRX);

int x, y, orient;

int main(){    
    while(true)
    {         
        while(ofn.checkMotion()){
            x = ofn.readX();
            y = ofn.readY();
            orient = ofn.readOrientation();
            pc.printf("X, Y: (%d, %d) & Orientation = %d \n", x, y, orient);
        }
    }   
}


Import programOFN_Hello_World_Demo

Demo code for Parallax OFN module 27903

Last commit 09 Mar 2015 by Neha Kadam


Import libraryOFN

Version 1.0 - Library for Parallax OFN module 27903

Last commit 09 Mar 2015 by Neha Kadam

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