Bei Chen Liu / mbed-src

mbed library sources

Fork of mbed-src by mbed official

api/BusOut.h@212:34d62c0b2af6, 2014-05-26 (annotated)

Committer:
mbed_official
Date:
Mon May 26 18:15:07 2014 +0100
Revision:
212:34d62c0b2af6
Parent:
13:0645d8841f51
Child:
455:8bc3a354916d
Synchronized with git revision f65b7d907785089e8dd942446f1c974b3a213a39



Full URL: https://github.com/mbedmicro/mbed/commit/f65b7d907785089e8dd942446f1c974b3a213a39/

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_BUSOUT_H
bogdanm 13:0645d8841f51 17 #define MBED_BUSOUT_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "DigitalOut.h"
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 namespace mbed {
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 /** A digital output bus, used for setting the state of a collection of pins
bogdanm 13:0645d8841f51 24 */
bogdanm 13:0645d8841f51 25 class BusOut {
bogdanm 13:0645d8841f51 26
bogdanm 13:0645d8841f51 27 public:
bogdanm 13:0645d8841f51 28
bogdanm 13:0645d8841f51 29 /** Create an BusOut, connected to the specified pins
bogdanm 13:0645d8841f51 30 *
bogdanm 13:0645d8841f51 31 * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC)
bogdanm 13:0645d8841f51 32 *
bogdanm 13:0645d8841f51 33 * @note
bogdanm 13:0645d8841f51 34 * It is only required to specify as many pin variables as is required
bogdanm 13:0645d8841f51 35 * for the bus; the rest will default to NC (not connected)
bogdanm 13:0645d8841f51 36 */
bogdanm 13:0645d8841f51 37 BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
bogdanm 13:0645d8841f51 38 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
bogdanm 13:0645d8841f51 39 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
bogdanm 13:0645d8841f51 40 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
bogdanm 13:0645d8841f51 41
bogdanm 13:0645d8841f51 42 BusOut(PinName pins[16]);
bogdanm 13:0645d8841f51 43
bogdanm 13:0645d8841f51 44 virtual ~BusOut();
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 /** Write the value to the output bus
bogdanm 13:0645d8841f51 47 *
bogdanm 13:0645d8841f51 48 * @param value An integer specifying a bit to write for every corresponding DigitalOut pin
bogdanm 13:0645d8841f51 49 */
bogdanm 13:0645d8841f51 50 void write(int value);
bogdanm 13:0645d8841f51 51
bogdanm 13:0645d8841f51 52 /** Read the value currently output on the bus
bogdanm 13:0645d8841f51 53 *
bogdanm 13:0645d8841f51 54 * @returns
bogdanm 13:0645d8841f51 55 * An integer with each bit corresponding to associated DigitalOut pin setting
bogdanm 13:0645d8841f51 56 */
bogdanm 13:0645d8841f51 57 int read();
bogdanm 13:0645d8841f51 58
bogdanm 13:0645d8841f51 59 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 60 /** A shorthand for write()
bogdanm 13:0645d8841f51 61 */
bogdanm 13:0645d8841f51 62 BusOut& operator= (int v);
bogdanm 13:0645d8841f51 63 BusOut& operator= (BusOut& rhs);
bogdanm 13:0645d8841f51 64
bogdanm 13:0645d8841f51 65 /** A shorthand for read()
bogdanm 13:0645d8841f51 66 */
bogdanm 13:0645d8841f51 67 operator int();
bogdanm 13:0645d8841f51 68 #endif
bogdanm 13:0645d8841f51 69
bogdanm 13:0645d8841f51 70 protected:
bogdanm 13:0645d8841f51 71 DigitalOut* _pin[16];
mbed_official 212:34d62c0b2af6 72
mbed_official 212:34d62c0b2af6 73 /* disallow copy constructor and assignment operators */
mbed_official 212:34d62c0b2af6 74 private:
mbed_official 212:34d62c0b2af6 75 BusOut(const BusOut&);
mbed_official 212:34d62c0b2af6 76 BusOut & operator = (const BusOut&);
bogdanm 13:0645d8841f51 77 };
bogdanm 13:0645d8841f51 78
bogdanm 13:0645d8841f51 79 } // namespace mbed
bogdanm 13:0645d8841f51 80
bogdanm 13:0645d8841f51 81 #endif