mirror of https://github.com/ARMmbed/mbed-os.git
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBED_PORTOUT_H
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#define MBED_PORTOUT_H
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#include "platform/platform.h"
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#if defined (DEVICE_PORTOUT) || defined(DOXYGEN_ONLY)
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#include "hal/port_api.h"
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#include "platform/mbed_critical.h"
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namespace mbed {
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/** \addtogroup drivers */
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/** A multiple pin digital output
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*
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* @note Synchronization level: Interrupt safe
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*
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* Example:
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* @code
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* // Toggle all four LEDs
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*
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* #include "mbed.h"
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*
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* // LED1 = P1.18 LED2 = P1.20 LED3 = P1.21 LED4 = P1.23
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* #define LED_MASK 0x00B40000
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*
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* PortOut ledport(Port1, LED_MASK);
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*
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* int main() {
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* while(1) {
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* ledport = LED_MASK;
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* wait(1);
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* ledport = 0;
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* wait(1);
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* }
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* }
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* @endcode
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* @ingroup drivers
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*/
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class PortOut {
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public:
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/** Create a PortOut, connected to the specified port
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*
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* @param port Port to connect to (as defined in target's PortNames.h)
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* @param mask Bitmask defines which port pins are an output (0 - ignore, 1 - include)
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*/
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PortOut(PortName port, int mask = 0xFFFFFFFF)
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{
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core_util_critical_section_enter();
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port_init(&_port, port, mask, PIN_OUTPUT);
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core_util_critical_section_exit();
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}
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/** Write the value to the output port
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*
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* @param value An integer specifying a bit to write for every corresponding PortOut pin
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*/
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void write(int value)
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{
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port_write(&_port, value);
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}
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/** Read the value currently output on the port
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*
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* @returns
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* An integer with each bit corresponding to associated pin value
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*/
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int read()
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{
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return port_read(&_port);
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}
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/** A shorthand for write()
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* \sa PortOut::write()
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*/
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PortOut &operator= (int value)
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{
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write(value);
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return *this;
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}
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/** A shorthand for read()
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* \sa PortOut::read()
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*/
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PortOut &operator= (PortOut &rhs)
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{
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write(rhs.read());
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return *this;
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}
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/** A shorthand for read()
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* \sa PortOut::read()
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*/
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operator int()
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{
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return read();
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}
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private:
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port_t _port;
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};
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} // namespace mbed
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#endif
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#endif
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