DongEun Koak / mbed-src

mbed library sources

Dependents:   Freedman_v2 Nucleo_i2c_OLED_BME280_copy

Fork of mbed-src by mbed official

api/BusIn.h@455:8bc3a354916d, 2015-01-27 (annotated)

Committer:
mbed_official
Date:
Tue Jan 27 13:30:08 2015 +0000
Revision:
455:8bc3a354916d
Parent:
212:34d62c0b2af6 
Synchronized with git revision de09d163deef812a246ac8c48fb2978385bc7b53



Full URL: https://github.com/mbedmicro/mbed/commit/de09d163deef812a246ac8c48fb2978385bc7b53/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_BUSIN_H
bogdanm 13:0645d8841f51 17 #define MBED_BUSIN_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "platform.h"
bogdanm 13:0645d8841f51 20 #include "DigitalIn.h"
bogdanm 13:0645d8841f51 21
bogdanm 13:0645d8841f51 22 namespace mbed {
bogdanm 13:0645d8841f51 23
bogdanm 13:0645d8841f51 24 /** A digital input bus, used for reading the state of a collection of pins
bogdanm 13:0645d8841f51 25 */
bogdanm 13:0645d8841f51 26 class BusIn {
bogdanm 13:0645d8841f51 27
bogdanm 13:0645d8841f51 28 public:
bogdanm 13:0645d8841f51 29 /* Group: Configuration Methods */
bogdanm 13:0645d8841f51 30
bogdanm 13:0645d8841f51 31 /** Create an BusIn, connected to the specified pins
bogdanm 13:0645d8841f51 32 *
bogdanm 13:0645d8841f51 33 * @param <n> DigitalIn pin to connect to bus bit <n> (p5-p30, NC)
bogdanm 13:0645d8841f51 34 *
bogdanm 13:0645d8841f51 35 * @note
bogdanm 13:0645d8841f51 36 * It is only required to specify as many pin variables as is required
bogdanm 13:0645d8841f51 37 * for the bus; the rest will default to NC (not connected)
bogdanm 13:0645d8841f51 38 */
bogdanm 13:0645d8841f51 39 BusIn(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
bogdanm 13:0645d8841f51 40 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
bogdanm 13:0645d8841f51 41 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
bogdanm 13:0645d8841f51 42 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
bogdanm 13:0645d8841f51 43
bogdanm 13:0645d8841f51 44 BusIn(PinName pins[16]);
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 virtual ~BusIn();
bogdanm 13:0645d8841f51 47
bogdanm 13:0645d8841f51 48 /** Read the value of the input bus
bogdanm 13:0645d8841f51 49 *
bogdanm 13:0645d8841f51 50 * @returns
bogdanm 13:0645d8841f51 51 * An integer with each bit corresponding to the value read from the associated DigitalIn pin
bogdanm 13:0645d8841f51 52 */
bogdanm 13:0645d8841f51 53 int read();
mbed_official 212:34d62c0b2af6 54
mbed_official 160:6870f452afa4 55 /** Set the input pin mode
mbed_official 160:6870f452afa4 56 *
mbed_official 160:6870f452afa4 57 * @param mode PullUp, PullDown, PullNone
mbed_official 160:6870f452afa4 58 */
mbed_official 160:6870f452afa4 59 void mode(PinMode pull);
mbed_official 212:34d62c0b2af6 60
mbed_official 455:8bc3a354916d 61 /** Binary mask of bus pins connected to actual pins (not NC pins)
mbed_official 455:8bc3a354916d 62 * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
mbed_official 455:8bc3a354916d 63 *
mbed_official 455:8bc3a354916d 64 * @returns
mbed_official 455:8bc3a354916d 65 * Binary mask of connected pins
mbed_official 455:8bc3a354916d 66 */
mbed_official 455:8bc3a354916d 67 int mask() {
mbed_official 455:8bc3a354916d 68 return _nc_mask;
mbed_official 455:8bc3a354916d 69 }
mbed_official 455:8bc3a354916d 70
bogdanm 13:0645d8841f51 71 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 72 /** A shorthand for read()
bogdanm 13:0645d8841f51 73 */
bogdanm 13:0645d8841f51 74 operator int();
mbed_official 455:8bc3a354916d 75
mbed_official 455:8bc3a354916d 76 /** Access to particular bit in random-iterator fashion
mbed_official 455:8bc3a354916d 77 */
mbed_official 455:8bc3a354916d 78 DigitalIn & operator[] (int index);
bogdanm 13:0645d8841f51 79 #endif
bogdanm 13:0645d8841f51 80
bogdanm 13:0645d8841f51 81 protected:
bogdanm 13:0645d8841f51 82 DigitalIn* _pin[16];
mbed_official 212:34d62c0b2af6 83
mbed_official 455:8bc3a354916d 84 /** Mask of bus's NC pins
mbed_official 455:8bc3a354916d 85 * If bit[n] is set to 1 - pin is connected
mbed_official 455:8bc3a354916d 86 * if bit[n] is cleared - pin is not connected (NC)
mbed_official 455:8bc3a354916d 87 */
mbed_official 455:8bc3a354916d 88 int _nc_mask;
mbed_official 455:8bc3a354916d 89
mbed_official 212:34d62c0b2af6 90 /* disallow copy constructor and assignment operators */
mbed_official 212:34d62c0b2af6 91 private:
mbed_official 212:34d62c0b2af6 92 BusIn(const BusIn&);
mbed_official 212:34d62c0b2af6 93 BusIn & operator = (const BusIn&);
bogdanm 13:0645d8841f51 94 };
bogdanm 13:0645d8841f51 95
bogdanm 13:0645d8841f51 96 } // namespace mbed
bogdanm 13:0645d8841f51 97
bogdanm 13:0645d8841f51 98 #endif