R1 code for micro:bit based train controller code, requires second micro:bit running tx code to operate - see https://meanderingpi.wordpress.com/ for more information
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DigitalOut.h
- Committer:
- DavidMS
- Date:
- 2017-05-23
- Revision:
- 4:1a27ae39e33f
- Parent:
- 0:e1a608bb55e8
File content as of revision 4:1a27ae39e33f:
/* 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_DIGITALOUT_H #define MBED_DIGITALOUT_H #include "platform.h" #include "gpio_api.h" namespace mbed { /** A digital output, used for setting the state of a pin * * Example: * @code * // Toggle a LED * #include "mbed.h" * * DigitalOut led(LED1); * * int main() { * while(1) { * led = !led; * wait(0.2); * } * } * @endcode */ class DigitalOut { public: /** Create a DigitalOut connected to the specified pin * * @param pin DigitalOut pin to connect to */ DigitalOut(PinName pin) : gpio() { gpio_init_out(&gpio, pin); } /** Create a DigitalOut connected to the specified pin * * @param pin DigitalOut pin to connect to * @param value the initial pin value */ DigitalOut(PinName pin, int value) : gpio() { gpio_init_out_ex(&gpio, pin, value); } /** Set the output, specified as 0 or 1 (int) * * @param value An integer specifying the pin output value, * 0 for logical 0, 1 (or any other non-zero value) for logical 1 */ void write(int value) { gpio_write(&gpio, value); } /** Return the output setting, represented as 0 or 1 (int) * * @returns * an integer representing the output setting of the pin, * 0 for logical 0, 1 for logical 1 */ int read() { return gpio_read(&gpio); } /** Return the output setting, represented as 0 or 1 (int) * * @returns * Non zero value if pin is connected to uc GPIO * 0 if gpio object was initialized with NC */ int is_connected() { return gpio_is_connected(&gpio); } #ifdef MBED_OPERATORS /** A shorthand for write() */ DigitalOut& operator= (int value) { write(value); return *this; } DigitalOut& operator= (DigitalOut& rhs) { write(rhs.read()); return *this; } /** A shorthand for read() */ operator int() { return read(); } #endif protected: gpio_t gpio; }; } // namespace mbed #endif