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mbed 2
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drivers/BusIn.h@170:e95d10626187, 2018-09-06 (annotated)
- Committer:
- AnnaBridge
- Date:
- Thu Sep 06 13:39:34 2018 +0100
- Revision:
- 170:e95d10626187
- Parent:
- 156:ff21514d8981
- Child:
- 172:65be27845400
mbed library. Release version 163
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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AnnaBridge | 156:ff21514d8981 | 1 | /* mbed Microcontroller Library |
AnnaBridge | 156:ff21514d8981 | 2 | * Copyright (c) 2006-2013 ARM Limited |
AnnaBridge | 156:ff21514d8981 | 3 | * |
AnnaBridge | 156:ff21514d8981 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
AnnaBridge | 156:ff21514d8981 | 5 | * you may not use this file except in compliance with the License. |
AnnaBridge | 156:ff21514d8981 | 6 | * You may obtain a copy of the License at |
AnnaBridge | 156:ff21514d8981 | 7 | * |
AnnaBridge | 156:ff21514d8981 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
AnnaBridge | 156:ff21514d8981 | 9 | * |
AnnaBridge | 156:ff21514d8981 | 10 | * Unless required by applicable law or agreed to in writing, software |
AnnaBridge | 156:ff21514d8981 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
AnnaBridge | 156:ff21514d8981 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
AnnaBridge | 156:ff21514d8981 | 13 | * See the License for the specific language governing permissions and |
AnnaBridge | 156:ff21514d8981 | 14 | * limitations under the License. |
AnnaBridge | 156:ff21514d8981 | 15 | */ |
AnnaBridge | 156:ff21514d8981 | 16 | #ifndef MBED_BUSIN_H |
AnnaBridge | 156:ff21514d8981 | 17 | #define MBED_BUSIN_H |
AnnaBridge | 156:ff21514d8981 | 18 | |
AnnaBridge | 156:ff21514d8981 | 19 | #include "platform/platform.h" |
AnnaBridge | 156:ff21514d8981 | 20 | #include "drivers/DigitalIn.h" |
AnnaBridge | 156:ff21514d8981 | 21 | #include "platform/PlatformMutex.h" |
AnnaBridge | 156:ff21514d8981 | 22 | #include "platform/NonCopyable.h" |
AnnaBridge | 156:ff21514d8981 | 23 | |
AnnaBridge | 156:ff21514d8981 | 24 | namespace mbed { |
AnnaBridge | 156:ff21514d8981 | 25 | /** \addtogroup drivers */ |
AnnaBridge | 156:ff21514d8981 | 26 | |
AnnaBridge | 156:ff21514d8981 | 27 | /** A digital input bus, used for reading the state of a collection of pins |
AnnaBridge | 156:ff21514d8981 | 28 | * |
AnnaBridge | 156:ff21514d8981 | 29 | * @note Synchronization level: Thread safe |
AnnaBridge | 156:ff21514d8981 | 30 | * @ingroup drivers |
AnnaBridge | 156:ff21514d8981 | 31 | */ |
AnnaBridge | 156:ff21514d8981 | 32 | class BusIn : private NonCopyable<BusIn> { |
AnnaBridge | 156:ff21514d8981 | 33 | |
AnnaBridge | 156:ff21514d8981 | 34 | public: |
AnnaBridge | 156:ff21514d8981 | 35 | /* Group: Configuration Methods */ |
AnnaBridge | 156:ff21514d8981 | 36 | |
AnnaBridge | 156:ff21514d8981 | 37 | /** Create an BusIn, connected to the specified pins |
AnnaBridge | 156:ff21514d8981 | 38 | * |
AnnaBridge | 156:ff21514d8981 | 39 | * @param p0 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 40 | * @param p1 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 41 | * @param p2 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 42 | * @param p3 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 43 | * @param p4 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 44 | * @param p5 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 45 | * @param p6 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 46 | * @param p7 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 47 | * @param p8 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 48 | * @param p9 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 49 | * @param p10 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 50 | * @param p11 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 51 | * @param p12 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 52 | * @param p13 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 53 | * @param p14 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 54 | * @param p15 DigitalIn pin to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 55 | * |
AnnaBridge | 156:ff21514d8981 | 56 | * @note |
AnnaBridge | 156:ff21514d8981 | 57 | * It is only required to specify as many pin variables as is required |
AnnaBridge | 156:ff21514d8981 | 58 | * for the bus; the rest will default to NC (not connected) |
AnnaBridge | 156:ff21514d8981 | 59 | */ |
AnnaBridge | 156:ff21514d8981 | 60 | BusIn(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC, |
AnnaBridge | 156:ff21514d8981 | 61 | PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC, |
AnnaBridge | 156:ff21514d8981 | 62 | PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC, |
AnnaBridge | 156:ff21514d8981 | 63 | PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC); |
AnnaBridge | 156:ff21514d8981 | 64 | |
AnnaBridge | 170:e95d10626187 | 65 | |
AnnaBridge | 156:ff21514d8981 | 66 | /** Create an BusIn, connected to the specified pins |
AnnaBridge | 156:ff21514d8981 | 67 | * |
AnnaBridge | 156:ff21514d8981 | 68 | * @param pins An array of pins to connect to bus bit |
AnnaBridge | 156:ff21514d8981 | 69 | */ |
AnnaBridge | 170:e95d10626187 | 70 | BusIn(PinName pins[16]); |
AnnaBridge | 156:ff21514d8981 | 71 | |
AnnaBridge | 156:ff21514d8981 | 72 | virtual ~BusIn(); |
AnnaBridge | 156:ff21514d8981 | 73 | |
AnnaBridge | 156:ff21514d8981 | 74 | /** Read the value of the input bus |
AnnaBridge | 156:ff21514d8981 | 75 | * |
AnnaBridge | 156:ff21514d8981 | 76 | * @returns |
AnnaBridge | 156:ff21514d8981 | 77 | * An integer with each bit corresponding to the value read from the associated DigitalIn pin |
AnnaBridge | 156:ff21514d8981 | 78 | */ |
AnnaBridge | 156:ff21514d8981 | 79 | int read(); |
AnnaBridge | 156:ff21514d8981 | 80 | |
AnnaBridge | 156:ff21514d8981 | 81 | /** Set the input pin mode |
AnnaBridge | 156:ff21514d8981 | 82 | * |
AnnaBridge | 156:ff21514d8981 | 83 | * @param pull PullUp, PullDown, PullNone |
AnnaBridge | 156:ff21514d8981 | 84 | */ |
AnnaBridge | 156:ff21514d8981 | 85 | void mode(PinMode pull); |
AnnaBridge | 156:ff21514d8981 | 86 | |
AnnaBridge | 156:ff21514d8981 | 87 | /** Binary mask of bus pins connected to actual pins (not NC pins) |
AnnaBridge | 156:ff21514d8981 | 88 | * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1 |
AnnaBridge | 156:ff21514d8981 | 89 | * |
AnnaBridge | 156:ff21514d8981 | 90 | * @returns |
AnnaBridge | 156:ff21514d8981 | 91 | * Binary mask of connected pins |
AnnaBridge | 156:ff21514d8981 | 92 | */ |
AnnaBridge | 170:e95d10626187 | 93 | int mask() |
AnnaBridge | 170:e95d10626187 | 94 | { |
AnnaBridge | 156:ff21514d8981 | 95 | // No lock needed since _nc_mask is not modified outside the constructor |
AnnaBridge | 156:ff21514d8981 | 96 | return _nc_mask; |
AnnaBridge | 156:ff21514d8981 | 97 | } |
AnnaBridge | 156:ff21514d8981 | 98 | |
AnnaBridge | 156:ff21514d8981 | 99 | /** A shorthand for read() |
AnnaBridge | 156:ff21514d8981 | 100 | * \sa DigitalIn::read() |
AnnaBridge | 156:ff21514d8981 | 101 | */ |
AnnaBridge | 156:ff21514d8981 | 102 | operator int(); |
AnnaBridge | 156:ff21514d8981 | 103 | |
AnnaBridge | 156:ff21514d8981 | 104 | /** Access to particular bit in random-iterator fashion |
AnnaBridge | 156:ff21514d8981 | 105 | * @param index Position of bit |
AnnaBridge | 156:ff21514d8981 | 106 | */ |
AnnaBridge | 170:e95d10626187 | 107 | DigitalIn &operator[](int index); |
AnnaBridge | 156:ff21514d8981 | 108 | |
AnnaBridge | 156:ff21514d8981 | 109 | protected: |
AnnaBridge | 170:e95d10626187 | 110 | DigitalIn *_pin[16]; |
AnnaBridge | 156:ff21514d8981 | 111 | |
AnnaBridge | 156:ff21514d8981 | 112 | /* Mask of bus's NC pins |
AnnaBridge | 156:ff21514d8981 | 113 | * If bit[n] is set to 1 - pin is connected |
AnnaBridge | 156:ff21514d8981 | 114 | * if bit[n] is cleared - pin is not connected (NC) |
AnnaBridge | 156:ff21514d8981 | 115 | */ |
AnnaBridge | 156:ff21514d8981 | 116 | int _nc_mask; |
AnnaBridge | 156:ff21514d8981 | 117 | |
AnnaBridge | 156:ff21514d8981 | 118 | PlatformMutex _mutex; |
AnnaBridge | 156:ff21514d8981 | 119 | |
AnnaBridge | 156:ff21514d8981 | 120 | private: |
AnnaBridge | 156:ff21514d8981 | 121 | virtual void lock(); |
AnnaBridge | 156:ff21514d8981 | 122 | virtual void unlock(); |
AnnaBridge | 156:ff21514d8981 | 123 | }; |
AnnaBridge | 156:ff21514d8981 | 124 | |
AnnaBridge | 156:ff21514d8981 | 125 | } // namespace mbed |
AnnaBridge | 156:ff21514d8981 | 126 | |
AnnaBridge | 156:ff21514d8981 | 127 | #endif |
AnnaBridge | 156:ff21514d8981 | 128 |