fix LPC812 PWM
Fork of mbed-dev by
Diff: api/BusOut.h
- Revision:
- 0:9b334a45a8ff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/api/BusOut.h Thu Oct 01 15:25:22 2015 +0300 @@ -0,0 +1,101 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBED_BUSOUT_H +#define MBED_BUSOUT_H + +#include "DigitalOut.h" + +namespace mbed { + +/** A digital output bus, used for setting the state of a collection of pins + */ +class BusOut { + +public: + + /** Create an BusOut, connected to the specified pins + * + * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC) + * + * @note + * It is only required to specify as many pin variables as is required + * for the bus; the rest will default to NC (not connected) + */ + BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC, + PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC, + PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC, + PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC); + + BusOut(PinName pins[16]); + + virtual ~BusOut(); + + /** Write the value to the output bus + * + * @param value An integer specifying a bit to write for every corresponding DigitalOut pin + */ + void write(int value); + + /** Read the value currently output on the bus + * + * @returns + * An integer with each bit corresponding to associated DigitalOut pin setting + */ + int read(); + + /** Binary mask of bus pins connected to actual pins (not NC pins) + * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1 + * + * @returns + * Binary mask of connected pins + */ + int mask() { + return _nc_mask; + } + +#ifdef MBED_OPERATORS + /** A shorthand for write() + */ + BusOut& operator= (int v); + BusOut& operator= (BusOut& rhs); + + /** Access to particular bit in random-iterator fashion + */ + DigitalOut& operator[] (int index); + + /** A shorthand for read() + */ + operator int(); +#endif + +protected: + DigitalOut* _pin[16]; + + /** Mask of bus's NC pins + * If bit[n] is set to 1 - pin is connected + * if bit[n] is cleared - pin is not connected (NC) + */ + int _nc_mask; + + /* disallow copy constructor and assignment operators */ +private: + BusOut(const BusOut&); + BusOut & operator = (const BusOut&); +}; + +} // namespace mbed + +#endif