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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

drivers/PortIn.h@157:e7ca05fa8600, 2017-11-09 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 09 11:14:10 2017 +0000
Revision:
157:e7ca05fa8600
Parent:
156:ff21514d8981
Child:
170:e95d10626187
Release 155 of the mbed library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
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_PORTIN_H
AnnaBridge 156:ff21514d8981 17 #define MBED_PORTIN_H
AnnaBridge 156:ff21514d8981 18
AnnaBridge 156:ff21514d8981 19 #include "platform/platform.h"
AnnaBridge 156:ff21514d8981 20
AnnaBridge 156:ff21514d8981 21 #if defined (DEVICE_PORTIN) || defined(DOXYGEN_ONLY)
AnnaBridge 156:ff21514d8981 22
AnnaBridge 156:ff21514d8981 23 #include "hal/port_api.h"
AnnaBridge 156:ff21514d8981 24 #include "platform/mbed_critical.h"
AnnaBridge 156:ff21514d8981 25
AnnaBridge 156:ff21514d8981 26 namespace mbed {
AnnaBridge 156:ff21514d8981 27 /** \addtogroup drivers */
AnnaBridge 156:ff21514d8981 28
AnnaBridge 156:ff21514d8981 29 /** A multiple pin digital input
AnnaBridge 156:ff21514d8981 30 *
AnnaBridge 156:ff21514d8981 31 * @note Synchronization level: Interrupt safe
AnnaBridge 156:ff21514d8981 32 *
AnnaBridge 156:ff21514d8981 33 * Example:
AnnaBridge 156:ff21514d8981 34 * @code
AnnaBridge 156:ff21514d8981 35 * // Switch on an LED if any of mbed pins 21-26 is high
AnnaBridge 156:ff21514d8981 36 *
AnnaBridge 156:ff21514d8981 37 * #include "mbed.h"
AnnaBridge 156:ff21514d8981 38 *
AnnaBridge 156:ff21514d8981 39 * PortIn p(Port2, 0x0000003F); // p21-p26
AnnaBridge 156:ff21514d8981 40 * DigitalOut ind(LED4);
AnnaBridge 156:ff21514d8981 41 *
AnnaBridge 156:ff21514d8981 42 * int main() {
AnnaBridge 156:ff21514d8981 43 * while(1) {
AnnaBridge 156:ff21514d8981 44 * int pins = p.read();
AnnaBridge 156:ff21514d8981 45 * if(pins) {
AnnaBridge 156:ff21514d8981 46 * ind = 1;
AnnaBridge 156:ff21514d8981 47 * } else {
AnnaBridge 156:ff21514d8981 48 * ind = 0;
AnnaBridge 156:ff21514d8981 49 * }
AnnaBridge 156:ff21514d8981 50 * }
AnnaBridge 156:ff21514d8981 51 * }
AnnaBridge 156:ff21514d8981 52 * @endcode
AnnaBridge 156:ff21514d8981 53 * @ingroup drivers
AnnaBridge 156:ff21514d8981 54 */
AnnaBridge 156:ff21514d8981 55 class PortIn {
AnnaBridge 156:ff21514d8981 56 public:
AnnaBridge 156:ff21514d8981 57
AnnaBridge 156:ff21514d8981 58 /** Create an PortIn, connected to the specified port
AnnaBridge 156:ff21514d8981 59 *
AnnaBridge 156:ff21514d8981 60 * @param port Port to connect to (Port0-Port5)
AnnaBridge 156:ff21514d8981 61 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
AnnaBridge 156:ff21514d8981 62 */
AnnaBridge 156:ff21514d8981 63 PortIn(PortName port, int mask = 0xFFFFFFFF) {
AnnaBridge 156:ff21514d8981 64 core_util_critical_section_enter();
AnnaBridge 156:ff21514d8981 65 port_init(&_port, port, mask, PIN_INPUT);
AnnaBridge 156:ff21514d8981 66 core_util_critical_section_exit();
AnnaBridge 156:ff21514d8981 67 }
AnnaBridge 156:ff21514d8981 68
AnnaBridge 156:ff21514d8981 69 /** Read the value currently output on the port
AnnaBridge 156:ff21514d8981 70 *
AnnaBridge 156:ff21514d8981 71 * @returns
AnnaBridge 156:ff21514d8981 72 * An integer with each bit corresponding to associated port pin setting
AnnaBridge 156:ff21514d8981 73 */
AnnaBridge 156:ff21514d8981 74 int read() {
AnnaBridge 156:ff21514d8981 75 return port_read(&_port);
AnnaBridge 156:ff21514d8981 76 }
AnnaBridge 156:ff21514d8981 77
AnnaBridge 156:ff21514d8981 78 /** Set the input pin mode
AnnaBridge 156:ff21514d8981 79 *
AnnaBridge 156:ff21514d8981 80 * @param mode PullUp, PullDown, PullNone, OpenDrain
AnnaBridge 156:ff21514d8981 81 */
AnnaBridge 156:ff21514d8981 82 void mode(PinMode mode) {
AnnaBridge 156:ff21514d8981 83 core_util_critical_section_enter();
AnnaBridge 156:ff21514d8981 84 port_mode(&_port, mode);
AnnaBridge 156:ff21514d8981 85 core_util_critical_section_exit();
AnnaBridge 156:ff21514d8981 86 }
AnnaBridge 156:ff21514d8981 87
AnnaBridge 156:ff21514d8981 88 /** A shorthand for read()
AnnaBridge 156:ff21514d8981 89 */
AnnaBridge 156:ff21514d8981 90 operator int() {
AnnaBridge 156:ff21514d8981 91 return read();
AnnaBridge 156:ff21514d8981 92 }
AnnaBridge 156:ff21514d8981 93
AnnaBridge 156:ff21514d8981 94 private:
AnnaBridge 156:ff21514d8981 95 port_t _port;
AnnaBridge 156:ff21514d8981 96 };
AnnaBridge 156:ff21514d8981 97
AnnaBridge 156:ff21514d8981 98 } // namespace mbed
AnnaBridge 156:ff21514d8981 99
AnnaBridge 156:ff21514d8981 100 #endif
AnnaBridge 156:ff21514d8981 101
AnnaBridge 156:ff21514d8981 102 #endif