Lines Matching full:signal

18 digital signal. They are provided from many kinds of chips, and are familiar
71 It is natural to assume that a GPIO is "active" when its output signal is 1
72 ("high"), and inactive when it is 0 ("low"). However in practice the signal of a
77 means "active") so that drivers only need to worry about the logical signal and
82 Sometimes shared signals need to use "open drain" (where only the low signal
83 level is actually driven), or "open source" (where only the high signal level is
85 used for TTL. A pullup or pulldown resistor causes the high or low signal level.
89 One common example of an open drain signal is a shared active-low IRQ line.
97  **LOW**: ``gpiod_direction_output(gpio, 0)`` ... this drives the signal and
101  the pullup (or some other device) controls the signal.
104 high signal and configuring the GPIO as input for low. This open drain/open
107 If you are "driving" the signal high but gpiod_get_value(gpio) reports a low
109 driving the shared signal low. That's not necessarily an error. As one common