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DigitalInOut.h@71:7ec3cb6bbcc4, 2013-11-29 (annotated)

Committer:
jalp89
Date:
Fri Nov 29 09:39:46 2013 +0000
Revision:
71:7ec3cb6bbcc4
Parent:
65:5798e58a58b1 
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 65:5798e58a58b1 1 /* mbed Microcontroller Library
bogdanm 65:5798e58a58b1 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 65:5798e58a58b1 3 *
bogdanm 65:5798e58a58b1 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 65:5798e58a58b1 5 * you may not use this file except in compliance with the License.
bogdanm 65:5798e58a58b1 6 * You may obtain a copy of the License at
bogdanm 65:5798e58a58b1 7 *
bogdanm 65:5798e58a58b1 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 65:5798e58a58b1 9 *
bogdanm 65:5798e58a58b1 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 65:5798e58a58b1 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 65:5798e58a58b1 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 65:5798e58a58b1 13 * See the License for the specific language governing permissions and
bogdanm 65:5798e58a58b1 14 * limitations under the License.
bogdanm 65:5798e58a58b1 15 */
bogdanm 65:5798e58a58b1 16 #ifndef MBED_DIGITALINOUT_H
bogdanm 65:5798e58a58b1 17 #define MBED_DIGITALINOUT_H
bogdanm 65:5798e58a58b1 18
bogdanm 65:5798e58a58b1 19 #include "platform.h"
bogdanm 65:5798e58a58b1 20
bogdanm 65:5798e58a58b1 21 #include "gpio_api.h"
bogdanm 65:5798e58a58b1 22
bogdanm 65:5798e58a58b1 23 namespace mbed {
bogdanm 65:5798e58a58b1 24
bogdanm 65:5798e58a58b1 25 /** A digital input/output, used for setting or reading a bi-directional pin
bogdanm 65:5798e58a58b1 26 */
bogdanm 65:5798e58a58b1 27 class DigitalInOut {
bogdanm 65:5798e58a58b1 28
bogdanm 65:5798e58a58b1 29 public:
bogdanm 65:5798e58a58b1 30 /** Create a DigitalInOut connected to the specified pin
bogdanm 65:5798e58a58b1 31 *
bogdanm 65:5798e58a58b1 32 * @param pin DigitalInOut pin to connect to
bogdanm 65:5798e58a58b1 33 */
bogdanm 65:5798e58a58b1 34 DigitalInOut(PinName pin) {
bogdanm 65:5798e58a58b1 35 gpio_init(&gpio, pin, PIN_INPUT);
bogdanm 65:5798e58a58b1 36 }
bogdanm 65:5798e58a58b1 37
bogdanm 65:5798e58a58b1 38 /** Set the output, specified as 0 or 1 (int)
bogdanm 65:5798e58a58b1 39 *
bogdanm 65:5798e58a58b1 40 * @param value An integer specifying the pin output value,
bogdanm 65:5798e58a58b1 41 * 0 for logical 0, 1 (or any other non-zero value) for logical 1
bogdanm 65:5798e58a58b1 42 */
bogdanm 65:5798e58a58b1 43 void write(int value) {
bogdanm 65:5798e58a58b1 44 gpio_write(&gpio, value);
bogdanm 65:5798e58a58b1 45 }
bogdanm 65:5798e58a58b1 46
bogdanm 65:5798e58a58b1 47 /** Return the output setting, represented as 0 or 1 (int)
bogdanm 65:5798e58a58b1 48 *
bogdanm 65:5798e58a58b1 49 * @returns
bogdanm 65:5798e58a58b1 50 * an integer representing the output setting of the pin if it is an output,
bogdanm 65:5798e58a58b1 51 * or read the input if set as an input
bogdanm 65:5798e58a58b1 52 */
bogdanm 65:5798e58a58b1 53 int read() {
bogdanm 65:5798e58a58b1 54 return gpio_read(&gpio);
bogdanm 65:5798e58a58b1 55 }
bogdanm 65:5798e58a58b1 56
bogdanm 65:5798e58a58b1 57 /** Set as an output
bogdanm 65:5798e58a58b1 58 */
bogdanm 65:5798e58a58b1 59 void output() {
bogdanm 65:5798e58a58b1 60 gpio_dir(&gpio, PIN_OUTPUT);
bogdanm 65:5798e58a58b1 61 }
bogdanm 65:5798e58a58b1 62
bogdanm 65:5798e58a58b1 63 /** Set as an input
bogdanm 65:5798e58a58b1 64 */
bogdanm 65:5798e58a58b1 65 void input() {
bogdanm 65:5798e58a58b1 66 gpio_dir(&gpio, PIN_INPUT);
bogdanm 65:5798e58a58b1 67 }
bogdanm 65:5798e58a58b1 68
bogdanm 65:5798e58a58b1 69 /** Set the input pin mode
bogdanm 65:5798e58a58b1 70 *
bogdanm 65:5798e58a58b1 71 * @param mode PullUp, PullDown, PullNone, OpenDrain
bogdanm 65:5798e58a58b1 72 */
bogdanm 65:5798e58a58b1 73 void mode(PinMode pull) {
bogdanm 65:5798e58a58b1 74 gpio_mode(&gpio, pull);
bogdanm 65:5798e58a58b1 75 }
bogdanm 65:5798e58a58b1 76
bogdanm 65:5798e58a58b1 77 #ifdef MBED_OPERATORS
bogdanm 65:5798e58a58b1 78 /** A shorthand for write()
bogdanm 65:5798e58a58b1 79 */
bogdanm 65:5798e58a58b1 80 DigitalInOut& operator= (int value) {
bogdanm 65:5798e58a58b1 81 write(value);
bogdanm 65:5798e58a58b1 82 return *this;
bogdanm 65:5798e58a58b1 83 }
bogdanm 65:5798e58a58b1 84
bogdanm 65:5798e58a58b1 85 DigitalInOut& operator= (DigitalInOut& rhs) {
bogdanm 65:5798e58a58b1 86 write(rhs.read());
bogdanm 65:5798e58a58b1 87 return *this;
bogdanm 65:5798e58a58b1 88 }
bogdanm 65:5798e58a58b1 89
bogdanm 65:5798e58a58b1 90 /** A shorthand for read()
bogdanm 65:5798e58a58b1 91 */
bogdanm 65:5798e58a58b1 92 operator int() {
bogdanm 65:5798e58a58b1 93 return read();
bogdanm 65:5798e58a58b1 94 }
bogdanm 65:5798e58a58b1 95 #endif
bogdanm 65:5798e58a58b1 96
bogdanm 65:5798e58a58b1 97 protected:
bogdanm 65:5798e58a58b1 98 gpio_t gpio;
bogdanm 65:5798e58a58b1 99 };
bogdanm 65:5798e58a58b1 100
bogdanm 65:5798e58a58b1 101 } // namespace mbed
bogdanm 65:5798e58a58b1 102
bogdanm 65:5798e58a58b1 103 #endif