Pulse library
Fork of Pulse by
Diff: Pulse.cpp
- Revision:
- 0:fb79a4637a64
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Pulse.cpp Wed Jul 04 15:56:06 2012 +0000 @@ -0,0 +1,139 @@ +/* Copyright (c) 2012 Nick Ryder, University of Oxford + * nick.ryder@physics.ox.ac.uk + * + * MIT License + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software + * and associated documentation files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, publish, distribute, + * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or + * substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +#include "Pulse.h" + +PulseInOut::PulseInOut(PinName pin): + startval(0), pulsetime(), runtime(), io(pin) { +} + + +PulseInOut::~PulseInOut() { +} + +void PulseInOut::write(int val) { + io.output(); + io = val; +} + +void PulseInOut::write_us(int val, int time) { + io.output(); + io = val; + wait_us(time); + io = !val; +} + +int PulseInOut::read_high_us() { + pulsetime.reset(); + io.input(); + while (io == 1) { + } + while (io == 0) { + } + pulsetime.start(); + while (io == 1) { + } + pulsetime.stop(); + return pulsetime.read_us(); +} + +int PulseInOut::read_high_us(int timeout) { + runtime.reset(); + runtime.start(); + pulsetime.reset(); + io.input(); + while (io == 1) { + if (runtime.read_us() > timeout) return -1; + } + while (io == 0) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.start(); + while (io == 1) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.stop(); + return pulsetime.read_us(); +} + +int PulseInOut::read_low_us() { + pulsetime.reset(); + io.input(); + while (io == 0) { + } + while (io == 1) { + } + pulsetime.start(); + while (io == 0) { + } + pulsetime.stop(); + return pulsetime.read_us(); +} + +int PulseInOut::read_low_us(int timeout) { + runtime.reset(); + runtime.start(); + pulsetime.reset(); + io.input(); + while (io == 0) { + if (runtime.read_us() > timeout) return -1; + } + while (io == 1) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.start(); + while (io == 0) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.stop(); + return pulsetime.read_us(); +} + +int PulseInOut::read_us() { + pulsetime.reset(); + io.input(); + startval = io; + while (io == startval) { + } + pulsetime.start(); + while (io != startval) { + } + pulsetime.stop(); + return pulsetime.read_us(); +} + +int PulseInOut::read_us(int timeout) { + runtime.reset(); + runtime.start(); + pulsetime.reset(); + io.input(); + startval = io; + while (io == startval) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.start(); + while (io != startval) { + if (runtime.read_us() > timeout) return -1; + } + pulsetime.stop(); + return pulsetime.read_us(); +} \ No newline at end of file