srf04.c (8f73a13f74571941c2ad6d04c65b52d39cbdf90b) srf04.c (3593cd53962fa17e4eaaae8faa5c8f62ec7bbd5e)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SRF04: ultrasonic sensor for distance measuring by using GPIOs
4 *
5 * Copyright (c) 2017 Andreas Klinger <ak@it-klinger.de>
6 *
7 * For details about the device see:
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SRF04: ultrasonic sensor for distance measuring by using GPIOs
4 *
5 * Copyright (c) 2017 Andreas Klinger <ak@it-klinger.de>
6 *
7 * For details about the device see:
8 * http://www.robot-electronics.co.uk/htm/srf04tech.htm
8 * https://www.robot-electronics.co.uk/htm/srf04tech.htm
9 *
10 * the measurement cycle as timing diagram looks like:
11 *
12 * +---+
13 * GPIO | |
14 * trig: --+ +------------------------------------------------------
15 * ^ ^
16 * |<->|

--- 392 unchanged lines hidden --- 		9 *
10 * the measurement cycle as timing diagram looks like:
11 *
12 * +---+
13 * GPIO | |
14 * trig: --+ +------------------------------------------------------
15 * ^ ^
16 * |<->|

--- 392 unchanged lines hidden ---