i2cdetect

Hi, I'm using an adapted version of i2cdetect for my own i2c experiments. Maybe it is useful for somebody else:

function scanI2c( i2c, first, last ) {
   if (typeof first === "undefined") {
        first = 0x03;
    }
    if (typeof (last) === "undefined") {
        last = 0x77;
    }
    print( "     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f" );
    for (var upper = 0; upper < 8; ++upper) {
        var line = upper + "0: ";

        for (var lower = 0; lower < 16; ++lower) {
            var address = (upper << 4) + lower;

            // Skip unwanted addresses
            if ((address < first) || (address > last)) {
                line += "   ";
                continue;
            }

            try {
                i2c.readFrom( address, 1 );
                line += (address + 0x100).toString( 16 ).substr( -2 );
                line += " ";
            } catch (err) {
                line += "-- ";
            }
        }
        print( line );
    }
}

// Usage
I2C1.setup( {scl: B8, sda: B9} );
scanI2c( I2C1, 0x03, 0x2f );

Output - first line is not aligned correctly.

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          03 04 05 06 07 -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

What would be the right place for such a code snippet?

1. Too special → don't share
   
2. Own module: require("i2cdetect").scan()
   
3. https://gist.github.com/
   
4. ???
   
   

It takes quite a long time to scan all addresses. Is it possible to decrease the timeout somehow?