# Raise an exception if a firmware build is earlier than a given date
# buildcheck((2015,10,9))
def buildcheck(tupTarget):
    fail = True
    if 'uname' in dir(os):
        datestring = os.uname()[3]
        date = datestring.split(' on')[1]
        idate = tuple([int(x) for x in date.split('-')])
        fail = idate < tupTarget
    if fail:
        raise OSError('This driver requires a firmware build dated {:4d}-{:02d}-{:02d} or later'.format(*tupTarget))