public Object getValueAt(int rowIndex, int columnIndex) {
			SpiSlave slave = vSlaves.get(rowIndex);
			switch(columnIndex) {
			case 0: return slave.getReg();
			case 1: return slave.getName();
			case 2: return slave.getCompatible();
			case 3: return slave.getSpiMaxFrequency();
			case 4: return slave.isCpol();
			case 5: return slave.isCpha();
			case 6: return slave.isCsHigh();
			default: return null;
			}
		}