Yihui Xiong / mbed-src-nrf51822

customized mbed library sources for nrf51822

Dependents:   Grove_Node Potentiometer BLE_Beacon I2C_Scanner

api/DigitalInOut.h@0:700cadd8b708, 2014-11-04 (annotated)

Committer:
yihui
Date:
Tue Nov 04 07:38:53 2014 +0000
Revision:
0:700cadd8b708
customized mbed-src library for nrf51822

Who changed what in which revision?

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yihui 0:700cadd8b708 1 /* mbed Microcontroller Library
yihui 0:700cadd8b708 2 * Copyright (c) 2006-2013 ARM Limited
yihui 0:700cadd8b708 3 *
yihui 0:700cadd8b708 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 0:700cadd8b708 5 * you may not use this file except in compliance with the License.
yihui 0:700cadd8b708 6 * You may obtain a copy of the License at
yihui 0:700cadd8b708 7 *
yihui 0:700cadd8b708 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 0:700cadd8b708 9 *
yihui 0:700cadd8b708 10 * Unless required by applicable law or agreed to in writing, software
yihui 0:700cadd8b708 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 0:700cadd8b708 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 0:700cadd8b708 13 * See the License for the specific language governing permissions and
yihui 0:700cadd8b708 14 * limitations under the License.
yihui 0:700cadd8b708 15 */
yihui 0:700cadd8b708 16 #ifndef MBED_DIGITALINOUT_H
yihui 0:700cadd8b708 17 #define MBED_DIGITALINOUT_H
yihui 0:700cadd8b708 18
yihui 0:700cadd8b708 19 #include "platform.h"
yihui 0:700cadd8b708 20
yihui 0:700cadd8b708 21 #include "gpio_api.h"
yihui 0:700cadd8b708 22
yihui 0:700cadd8b708 23 namespace mbed {
yihui 0:700cadd8b708 24
yihui 0:700cadd8b708 25 /** A digital input/output, used for setting or reading a bi-directional pin
yihui 0:700cadd8b708 26 */
yihui 0:700cadd8b708 27 class DigitalInOut {
yihui 0:700cadd8b708 28
yihui 0:700cadd8b708 29 public:
yihui 0:700cadd8b708 30 /** Create a DigitalInOut connected to the specified pin
yihui 0:700cadd8b708 31 *
yihui 0:700cadd8b708 32 * @param pin DigitalInOut pin to connect to
yihui 0:700cadd8b708 33 */
yihui 0:700cadd8b708 34 DigitalInOut(PinName pin) : gpio() {
yihui 0:700cadd8b708 35 gpio_init_in(&gpio, pin);
yihui 0:700cadd8b708 36 }
yihui 0:700cadd8b708 37
yihui 0:700cadd8b708 38 /** Create a DigitalInOut connected to the specified pin
yihui 0:700cadd8b708 39 *
yihui 0:700cadd8b708 40 * @param pin DigitalInOut pin to connect to
yihui 0:700cadd8b708 41 * @param direction the initial direction of the pin
yihui 0:700cadd8b708 42 * @param mode the initial mode of the pin
yihui 0:700cadd8b708 43 * @param value the initial value of the pin if is an output
yihui 0:700cadd8b708 44 */
yihui 0:700cadd8b708 45 DigitalInOut(PinName pin, PinDirection direction, PinMode mode, int value) : gpio() {
yihui 0:700cadd8b708 46 gpio_init_inout(&gpio, pin, direction, mode, value);
yihui 0:700cadd8b708 47 }
yihui 0:700cadd8b708 48
yihui 0:700cadd8b708 49 /** Set the output, specified as 0 or 1 (int)
yihui 0:700cadd8b708 50 *
yihui 0:700cadd8b708 51 * @param value An integer specifying the pin output value,
yihui 0:700cadd8b708 52 * 0 for logical 0, 1 (or any other non-zero value) for logical 1
yihui 0:700cadd8b708 53 */
yihui 0:700cadd8b708 54 void write(int value) {
yihui 0:700cadd8b708 55 gpio_write(&gpio, value);
yihui 0:700cadd8b708 56 }
yihui 0:700cadd8b708 57
yihui 0:700cadd8b708 58 /** Return the output setting, represented as 0 or 1 (int)
yihui 0:700cadd8b708 59 *
yihui 0:700cadd8b708 60 * @returns
yihui 0:700cadd8b708 61 * an integer representing the output setting of the pin if it is an output,
yihui 0:700cadd8b708 62 * or read the input if set as an input
yihui 0:700cadd8b708 63 */
yihui 0:700cadd8b708 64 int read() {
yihui 0:700cadd8b708 65 return gpio_read(&gpio);
yihui 0:700cadd8b708 66 }
yihui 0:700cadd8b708 67
yihui 0:700cadd8b708 68 /** Set as an output
yihui 0:700cadd8b708 69 */
yihui 0:700cadd8b708 70 void output() {
yihui 0:700cadd8b708 71 gpio_dir(&gpio, PIN_OUTPUT);
yihui 0:700cadd8b708 72 }
yihui 0:700cadd8b708 73
yihui 0:700cadd8b708 74 /** Set as an input
yihui 0:700cadd8b708 75 */
yihui 0:700cadd8b708 76 void input() {
yihui 0:700cadd8b708 77 gpio_dir(&gpio, PIN_INPUT);
yihui 0:700cadd8b708 78 }
yihui 0:700cadd8b708 79
yihui 0:700cadd8b708 80 /** Set the input pin mode
yihui 0:700cadd8b708 81 *
yihui 0:700cadd8b708 82 * @param mode PullUp, PullDown, PullNone, OpenDrain
yihui 0:700cadd8b708 83 */
yihui 0:700cadd8b708 84 void mode(PinMode pull) {
yihui 0:700cadd8b708 85 gpio_mode(&gpio, pull);
yihui 0:700cadd8b708 86 }
yihui 0:700cadd8b708 87
yihui 0:700cadd8b708 88 #ifdef MBED_OPERATORS
yihui 0:700cadd8b708 89 /** A shorthand for write()
yihui 0:700cadd8b708 90 */
yihui 0:700cadd8b708 91 DigitalInOut& operator= (int value) {
yihui 0:700cadd8b708 92 write(value);
yihui 0:700cadd8b708 93 return *this;
yihui 0:700cadd8b708 94 }
yihui 0:700cadd8b708 95
yihui 0:700cadd8b708 96 DigitalInOut& operator= (DigitalInOut& rhs) {
yihui 0:700cadd8b708 97 write(rhs.read());
yihui 0:700cadd8b708 98 return *this;
yihui 0:700cadd8b708 99 }
yihui 0:700cadd8b708 100
yihui 0:700cadd8b708 101 /** A shorthand for read()
yihui 0:700cadd8b708 102 */
yihui 0:700cadd8b708 103 operator int() {
yihui 0:700cadd8b708 104 return read();
yihui 0:700cadd8b708 105 }
yihui 0:700cadd8b708 106 #endif
yihui 0:700cadd8b708 107
yihui 0:700cadd8b708 108 protected:
yihui 0:700cadd8b708 109 gpio_t gpio;
yihui 0:700cadd8b708 110 };
yihui 0:700cadd8b708 111
yihui 0:700cadd8b708 112 } // namespace mbed
yihui 0:700cadd8b708 113
yihui 0:700cadd8b708 114 #endif