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drivers/PortIn.h
- Committer:
- kevman
- Date:
- 2019-03-13
- Revision:
- 2:7aab896b1a3b
- Parent:
- 0:38ceb79fef03
File content as of revision 2:7aab896b1a3b:
/* 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_PORTIN_H #define MBED_PORTIN_H #include "platform/platform.h" #if defined (DEVICE_PORTIN) || defined(DOXYGEN_ONLY) #include "hal/port_api.h" #include "platform/mbed_critical.h" namespace mbed { /** \addtogroup drivers */ /** A multiple pin digital input * * @note Synchronization level: Interrupt safe * * Example: * @code * // Turn on an LED if any pins of Port2[0:5] are high * * #include "mbed.h" * * PortIn p(Port2, 0x0000003F); // Port2 pins [0:5] only * DigitalOut led(LED4); * * int main() { * while(1) { * int pins = p.read(); * if(pins) { * led = 1; * } else { * led = 0; * } * } * } * @endcode * @ingroup drivers */ class PortIn { public: /** Create a PortIn, connected to the specified port * * @param port Port to connect to (as defined in target's PortNames.h) * @param mask Bitmask defines which port pins should be an input (0 - ignore, 1 - include) */ PortIn(PortName port, int mask = 0xFFFFFFFF) { core_util_critical_section_enter(); port_init(&_port, port, mask, PIN_INPUT); core_util_critical_section_exit(); } /** Read the value input to the port * * @returns * An integer with each bit corresponding to the associated pin value */ int read() { return port_read(&_port); } /** 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 read() */ operator int() { return read(); } private: port_t _port; }; } // namespace mbed #endif #endif