function setScanLimit(addr, limit) {
	    if(addr<0 || addr>=maxDevices)
			return;

		//console.log("OP_SCANLIMIT");
	    if(limit>=0 && limit<8)
	    	spiTransfer(addr, OP_SCANLIMIT,limit);
	}
function setScanLimit(addr, limit) {
	    if(addr<0 || addr>=maxDevices)
			return;

		//console.log("OP_SCANLIMIT");
	    if(limit>=0 && limit<8)
	    	spiTransfer(addr, OP_SCANLIMIT,limit);
	}
function setScanLimit ( addr , limit ) { if ( addr < 0 || addr >= maxDevices ) return ; //console.log("OP_SCANLIMIT"); if ( limit >= 0 && limit < 8 ) spiTransfer ( addr , OP_SCANLIMIT , limit ) ; }
sets the number of pixels per row, pretty much always 8 for most devices.
sets the number of pixels per row pretty much always 8 for most devices .