Pedro Correia / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

drivers/BusIn.h@167:e84263d55307, 2017-06-21 (annotated)

Committer:
AnnaBridge
Date:
Wed Jun 21 17:46:44 2017 +0100
Revision:
167:e84263d55307
Parent:
149:156823d33999
Child:
168:9672193075cf
This updates the lib to the mbed lib v 145

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16 #ifndef MBED_BUSIN_H
<> 149:156823d33999 17 #define MBED_BUSIN_H
<> 149:156823d33999 18
<> 149:156823d33999 19 #include "platform/platform.h"
<> 149:156823d33999 20 #include "drivers/DigitalIn.h"
<> 149:156823d33999 21 #include "platform/PlatformMutex.h"
<> 149:156823d33999 22
<> 149:156823d33999 23 namespace mbed {
<> 149:156823d33999 24 /** \addtogroup drivers */
<> 149:156823d33999 25
<> 149:156823d33999 26 /** A digital input bus, used for reading the state of a collection of pins
<> 149:156823d33999 27 *
AnnaBridge 167:e84263d55307 28 * @note Synchronization level: Thread safe
AnnaBridge 167:e84263d55307 29 * @ingroup drivers
<> 149:156823d33999 30 */
<> 149:156823d33999 31 class BusIn {
<> 149:156823d33999 32
<> 149:156823d33999 33 public:
<> 149:156823d33999 34 /* Group: Configuration Methods */
<> 149:156823d33999 35
<> 149:156823d33999 36 /** Create an BusIn, connected to the specified pins
<> 149:156823d33999 37 *
AnnaBridge 167:e84263d55307 38 * @param p0 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 39 * @param p1 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 40 * @param p2 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 41 * @param p3 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 42 * @param p4 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 43 * @param p5 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 44 * @param p6 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 45 * @param p7 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 46 * @param p8 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 47 * @param p9 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 48 * @param p10 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 49 * @param p11 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 50 * @param p12 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 51 * @param p13 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 52 * @param p14 DigitalIn pin to connect to bus bit
AnnaBridge 167:e84263d55307 53 * @param p15 DigitalIn pin to connect to bus bit
<> 149:156823d33999 54 *
<> 149:156823d33999 55 * @note
<> 149:156823d33999 56 * It is only required to specify as many pin variables as is required
<> 149:156823d33999 57 * for the bus; the rest will default to NC (not connected)
<> 149:156823d33999 58 */
<> 149:156823d33999 59 BusIn(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
<> 149:156823d33999 60 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
<> 149:156823d33999 61 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
<> 149:156823d33999 62 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
<> 149:156823d33999 63
AnnaBridge 167:e84263d55307 64
AnnaBridge 167:e84263d55307 65 /** Create an BusIn, connected to the specified pins
AnnaBridge 167:e84263d55307 66 *
AnnaBridge 167:e84263d55307 67 * @param pins An array of pins to connect to bus bit
AnnaBridge 167:e84263d55307 68 */
AnnaBridge 167:e84263d55307 69 BusIn(PinName pins[16]);
<> 149:156823d33999 70
<> 149:156823d33999 71 virtual ~BusIn();
<> 149:156823d33999 72
<> 149:156823d33999 73 /** Read the value of the input bus
<> 149:156823d33999 74 *
<> 149:156823d33999 75 * @returns
<> 149:156823d33999 76 * An integer with each bit corresponding to the value read from the associated DigitalIn pin
<> 149:156823d33999 77 */
<> 149:156823d33999 78 int read();
<> 149:156823d33999 79
<> 149:156823d33999 80 /** Set the input pin mode
<> 149:156823d33999 81 *
AnnaBridge 167:e84263d55307 82 * @param pull PullUp, PullDown, PullNone
<> 149:156823d33999 83 */
<> 149:156823d33999 84 void mode(PinMode pull);
<> 149:156823d33999 85
<> 149:156823d33999 86 /** Binary mask of bus pins connected to actual pins (not NC pins)
<> 149:156823d33999 87 * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
<> 149:156823d33999 88 *
<> 149:156823d33999 89 * @returns
<> 149:156823d33999 90 * Binary mask of connected pins
<> 149:156823d33999 91 */
<> 149:156823d33999 92 int mask() {
<> 149:156823d33999 93 // No lock needed since _nc_mask is not modified outside the constructor
<> 149:156823d33999 94 return _nc_mask;
<> 149:156823d33999 95 }
<> 149:156823d33999 96
<> 149:156823d33999 97 /** A shorthand for read()
AnnaBridge 167:e84263d55307 98 * \sa DigitalIn::read()
<> 149:156823d33999 99 */
<> 149:156823d33999 100 operator int();
<> 149:156823d33999 101
<> 149:156823d33999 102 /** Access to particular bit in random-iterator fashion
AnnaBridge 167:e84263d55307 103 * @param index Position of bit
<> 149:156823d33999 104 */
<> 149:156823d33999 105 DigitalIn & operator[] (int index);
<> 149:156823d33999 106
<> 149:156823d33999 107 protected:
<> 149:156823d33999 108 DigitalIn* _pin[16];
<> 149:156823d33999 109
AnnaBridge 167:e84263d55307 110 /* Mask of bus's NC pins
<> 149:156823d33999 111 * If bit[n] is set to 1 - pin is connected
<> 149:156823d33999 112 * if bit[n] is cleared - pin is not connected (NC)
<> 149:156823d33999 113 */
<> 149:156823d33999 114 int _nc_mask;
<> 149:156823d33999 115
<> 149:156823d33999 116 PlatformMutex _mutex;
<> 149:156823d33999 117
<> 149:156823d33999 118 /* disallow copy constructor and assignment operators */
<> 149:156823d33999 119 private:
<> 149:156823d33999 120 virtual void lock();
<> 149:156823d33999 121 virtual void unlock();
<> 149:156823d33999 122 BusIn(const BusIn&);
<> 149:156823d33999 123 BusIn & operator = (const BusIn&);
<> 149:156823d33999 124 };
<> 149:156823d33999 125
<> 149:156823d33999 126 } // namespace mbed
<> 149:156823d33999 127
<> 149:156823d33999 128 #endif
<> 149:156823d33999 129