• Paul Sokolovsky's avatar
    extmod/machine_pulse: Make time_pulse_us() not throw exceptions. · d5e9ab6e
    Paul Sokolovsky authored
    machine.time_pulse_us() is intended to provide very fine timing, including
    while working with signal bursts, where each transition is tracked in row.
    Throwing and handling an exception may take too much time and "signal loss".
    So instead, in case of a timeout, just return negative value. Cases of
    timeout while waiting for initial signal stabilization, and during actual
    timing, are recognized.
    The documentation is updated accordingly, and rewritten somewhat to clarify
    the function behavior.