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drivers/PortInOut.h
- Committer:
- kevman
- Date:
- 2018-11-28
- Revision:
- 0:38ceb79fef03
File content as of revision 0:38ceb79fef03:
/* 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_PORTINOUT_H #define MBED_PORTINOUT_H #include "platform/platform.h" #if defined (DEVICE_PORTINOUT) || defined(DOXYGEN_ONLY) #include "hal/port_api.h" #include "platform/mbed_critical.h" namespace mbed { /** \addtogroup drivers */ /** A multiple pin digital in/out used to set/read multiple bi-directional pins * * @note Synchronization level: Interrupt safe * @ingroup drivers */ class PortInOut { public: /** Create an PortInOut, connected to the specified port * * @param port Port to connect to (Port0-Port5) * @param mask A bitmask to identify which bits in the port should be included (0 - ignore) */ PortInOut(PortName port, int mask = 0xFFFFFFFF) { core_util_critical_section_enter(); port_init(&_port, port, mask, PIN_INPUT); core_util_critical_section_exit(); } /** Write the value to the output port * * @param value An integer specifying a bit to write for every corresponding port pin */ void write(int value) { port_write(&_port, value); } /** Read the value currently output on the port * * @returns * An integer with each bit corresponding to associated port pin setting */ int read() { return port_read(&_port); } /** Set as an output */ void output() { core_util_critical_section_enter(); port_dir(&_port, PIN_OUTPUT); core_util_critical_section_exit(); } /** Set as an input */ void input() { core_util_critical_section_enter(); port_dir(&_port, PIN_INPUT); core_util_critical_section_exit(); } /** Set the input pin mode * * @param mode PullUp, PullDown, PullNone, OpenDrain */ void mode(PinMode mode) { core_util_critical_section_enter(); port_mode(&_port, mode); core_util_critical_section_exit(); } /** A shorthand for write() * \sa PortInOut::write() */ PortInOut &operator= (int value) { write(value); return *this; } /** A shorthand for write() * \sa PortInOut::write() */ PortInOut &operator= (PortInOut &rhs) { write(rhs.read()); return *this; } /** A shorthand for read() * \sa PortInOut::read() */ operator int() { return read(); } private: port_t _port; }; } // namespace mbed #endif #endif