NRFD
if (gpiod_get_value(NRFD) == 0)
if (bb_get_irq(board, NAME "_NRFD", NRFD, &priv->irq_NRFD, bb_NRFD_interrupt, NULL,
gpiod_direction_input(NRFD);
gpiod_direction_output(NRFD, 0); /* hold off the talker */
gpiod_set_value(NRFD, 1); // ready for data
gpiod_set_value(NRFD, 0); // DIR_READ line state
gpiod_set_value(NRFD, 0); // not ready for data
gpiod_set_value(NRFD, 1); // ready for data
gpiod_get_value(NRFD), \
gpiod_get_value(NRFD), gpiod_get_value(NDAC));
if (gpiod_get_value(NRFD) && gpiod_get_value(NDAC)) { /* check for listener */
nrfd = gpiod_get_value(NRFD);
irq, gpiod_get_value(NRFD), ndac, board->status, priv->direction,