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cpp/PortIn.h@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #ifndef MBED_PORTIN_H
mbed_official 0:fd0d7bdfcdc2 23 #define MBED_PORTIN_H
mbed_official 0:fd0d7bdfcdc2 24
mbed_official 0:fd0d7bdfcdc2 25 #include "platform.h"
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 #if DEVICE_PORTIN
mbed_official 0:fd0d7bdfcdc2 28
mbed_official 0:fd0d7bdfcdc2 29 #include "port_api.h"
mbed_official 0:fd0d7bdfcdc2 30
mbed_official 0:fd0d7bdfcdc2 31 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 32
mbed_official 0:fd0d7bdfcdc2 33 /** A multiple pin digital input
mbed_official 0:fd0d7bdfcdc2 34 *
mbed_official 0:fd0d7bdfcdc2 35 * Example:
mbed_official 0:fd0d7bdfcdc2 36 * @code
mbed_official 0:fd0d7bdfcdc2 37 * // Switch on an LED if any of mbed pins 21-26 is high
mbed_official 0:fd0d7bdfcdc2 38 *
mbed_official 0:fd0d7bdfcdc2 39 * #include "mbed.h"
mbed_official 0:fd0d7bdfcdc2 40 *
mbed_official 0:fd0d7bdfcdc2 41 * PortIn p(Port2, 0x0000003F); // p21-p26
mbed_official 0:fd0d7bdfcdc2 42 * DigitalOut ind(LED4);
mbed_official 0:fd0d7bdfcdc2 43 *
mbed_official 0:fd0d7bdfcdc2 44 * int main() {
mbed_official 0:fd0d7bdfcdc2 45 * while(1) {
mbed_official 0:fd0d7bdfcdc2 46 * int pins = p.read();
mbed_official 0:fd0d7bdfcdc2 47 * if(pins) {
mbed_official 0:fd0d7bdfcdc2 48 * ind = 1;
mbed_official 0:fd0d7bdfcdc2 49 * } else {
mbed_official 0:fd0d7bdfcdc2 50 * ind = 0;
mbed_official 0:fd0d7bdfcdc2 51 * }
mbed_official 0:fd0d7bdfcdc2 52 * }
mbed_official 0:fd0d7bdfcdc2 53 * }
mbed_official 0:fd0d7bdfcdc2 54 * @endcode
mbed_official 0:fd0d7bdfcdc2 55 */
mbed_official 0:fd0d7bdfcdc2 56 class PortIn {
mbed_official 0:fd0d7bdfcdc2 57 public:
mbed_official 0:fd0d7bdfcdc2 58
mbed_official 0:fd0d7bdfcdc2 59 /** Create an PortIn, connected to the specified port
mbed_official 0:fd0d7bdfcdc2 60 *
mbed_official 0:fd0d7bdfcdc2 61 * @param port Port to connect to (Port0-Port5)
mbed_official 0:fd0d7bdfcdc2 62 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
mbed_official 0:fd0d7bdfcdc2 63 */
mbed_official 0:fd0d7bdfcdc2 64 PortIn(PortName port, int mask = 0xFFFFFFFF) {
mbed_official 0:fd0d7bdfcdc2 65 port_init(&_port, port, mask, PIN_INPUT);
mbed_official 0:fd0d7bdfcdc2 66 }
mbed_official 0:fd0d7bdfcdc2 67
mbed_official 0:fd0d7bdfcdc2 68 /** Read the value currently output on the port
mbed_official 0:fd0d7bdfcdc2 69 *
mbed_official 0:fd0d7bdfcdc2 70 * @returns
mbed_official 0:fd0d7bdfcdc2 71 * An integer with each bit corresponding to associated port pin setting
mbed_official 0:fd0d7bdfcdc2 72 */
mbed_official 0:fd0d7bdfcdc2 73 int read() {
mbed_official 0:fd0d7bdfcdc2 74 return port_read(&_port);
mbed_official 0:fd0d7bdfcdc2 75 }
mbed_official 0:fd0d7bdfcdc2 76
mbed_official 0:fd0d7bdfcdc2 77 /** Set the input pin mode
mbed_official 0:fd0d7bdfcdc2 78 *
mbed_official 0:fd0d7bdfcdc2 79 * @param mode PullUp, PullDown, PullNone, OpenDrain
mbed_official 0:fd0d7bdfcdc2 80 */
mbed_official 0:fd0d7bdfcdc2 81 void mode(PinMode mode) {
mbed_official 0:fd0d7bdfcdc2 82 port_mode(&_port, mode);
mbed_official 0:fd0d7bdfcdc2 83 }
mbed_official 0:fd0d7bdfcdc2 84
mbed_official 0:fd0d7bdfcdc2 85 /** A shorthand for read()
mbed_official 0:fd0d7bdfcdc2 86 */
mbed_official 0:fd0d7bdfcdc2 87 operator int() {
mbed_official 0:fd0d7bdfcdc2 88 return read();
mbed_official 0:fd0d7bdfcdc2 89 }
mbed_official 0:fd0d7bdfcdc2 90
mbed_official 0:fd0d7bdfcdc2 91 private:
mbed_official 0:fd0d7bdfcdc2 92 port_t _port;
mbed_official 0:fd0d7bdfcdc2 93 };
mbed_official 0:fd0d7bdfcdc2 94
mbed_official 0:fd0d7bdfcdc2 95 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 96
mbed_official 0:fd0d7bdfcdc2 97 #endif
mbed_official 0:fd0d7bdfcdc2 98
mbed_official 0:fd0d7bdfcdc2 99 #endif