File content as of revision 1:ef74b3428716:

#include "Tap.h"

I2C acc(p9,p10);
DigitalIn interrupt(p20);
BusOut led(LED1,LED2,LED3,LED4);



char Tap() 
{
    
    
    
    cs=0;
    acc.write(0x31); // data format
    acc.write(0x0B);  
    cs=1;
    
    cs=0;
    acc.write(0x2D);  // power control
    acc.write(0x08);  // measure mode
    cs=1;
    
    cs=0;
    acc.write(0x1D); // tap threshold
    acc.write(0x50);  // set to 5g 
    cs=1;
    
    cs=0;
    acc.write(0x21); // tap duration
    acc.write(0x10);  // set to 0.01
    cs=1;
    
    cs=0;
    acc.write(0x22); // double tap gap
    acc.write(0x05);  // set to aprox .006
    cs=1;
    
    cs=0;
    acc.write(0x23); // double tap window
    acc.write(0xFF);  // Set to .38175
    cs=1;
    
    cs=0;
    acc.write(0x2A); // tap axis
    acc.write(0x07);  // set to enable x,y, and z (00000111) 
    cs=1;
    
    cs=0;
    acc.write(0x2E); // interupt enable
    acc.write(0x60);  // set to single and double tap (01100000)
    cs=1;
    
    cs=0;
    acc.write(0x2F); // map interupt
    acc.write(0x60);  // set to 00000111
    cs=1;
    
    char Inbyte;
    
    while(1)
    {
        wait(0.01);
        Inbyte =0;
        
        if(interrupt==1)  // Check for interupt signal
        {
            cs=0;
            acc.write(0x80|0x30);  // Connect to device
            Inbyte = acc.write(0x00);  // Get interupt information
            if(Inbyte & 0x40)  // Turn on one LED for one tap
            {
                led =1;
                return 1;  
            }
            if(Inbyte & 0x20)  // Turn on two LEDs for two taps
            {
                led =3;
                return 2;
            }
            led =0;  // Turn off LED
        }     
    }   
}