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mbed_src_STM32F7/api/PortIn.h@0:aa3fc5ad02f7, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 09:08:29 2019 +0000
Revision:
0:aa3fc5ad02f7
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phungductung 0:aa3fc5ad02f7 1 /* mbed Microcontroller Library
phungductung 0:aa3fc5ad02f7 2 * Copyright (c) 2006-2013 ARM Limited
phungductung 0:aa3fc5ad02f7 3 *
phungductung 0:aa3fc5ad02f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
phungductung 0:aa3fc5ad02f7 5 * you may not use this file except in compliance with the License.
phungductung 0:aa3fc5ad02f7 6 * You may obtain a copy of the License at
phungductung 0:aa3fc5ad02f7 7 *
phungductung 0:aa3fc5ad02f7 8 * http://www.apache.org/licenses/LICENSE-2.0
phungductung 0:aa3fc5ad02f7 9 *
phungductung 0:aa3fc5ad02f7 10 * Unless required by applicable law or agreed to in writing, software
phungductung 0:aa3fc5ad02f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
phungductung 0:aa3fc5ad02f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
phungductung 0:aa3fc5ad02f7 13 * See the License for the specific language governing permissions and
phungductung 0:aa3fc5ad02f7 14 * limitations under the License.
phungductung 0:aa3fc5ad02f7 15 */
phungductung 0:aa3fc5ad02f7 16 #ifndef MBED_PORTIN_H
phungductung 0:aa3fc5ad02f7 17 #define MBED_PORTIN_H
phungductung 0:aa3fc5ad02f7 18
phungductung 0:aa3fc5ad02f7 19 #include "platform.h"
phungductung 0:aa3fc5ad02f7 20
phungductung 0:aa3fc5ad02f7 21 #if DEVICE_PORTIN
phungductung 0:aa3fc5ad02f7 22
phungductung 0:aa3fc5ad02f7 23 #include "port_api.h"
phungductung 0:aa3fc5ad02f7 24
phungductung 0:aa3fc5ad02f7 25 namespace mbed {
phungductung 0:aa3fc5ad02f7 26
phungductung 0:aa3fc5ad02f7 27 /** A multiple pin digital input
phungductung 0:aa3fc5ad02f7 28 *
phungductung 0:aa3fc5ad02f7 29 * Example:
phungductung 0:aa3fc5ad02f7 30 * @code
phungductung 0:aa3fc5ad02f7 31 * // Switch on an LED if any of mbed pins 21-26 is high
phungductung 0:aa3fc5ad02f7 32 *
phungductung 0:aa3fc5ad02f7 33 * #include "mbed.h"
phungductung 0:aa3fc5ad02f7 34 *
phungductung 0:aa3fc5ad02f7 35 * PortIn p(Port2, 0x0000003F); // p21-p26
phungductung 0:aa3fc5ad02f7 36 * DigitalOut ind(LED4);
phungductung 0:aa3fc5ad02f7 37 *
phungductung 0:aa3fc5ad02f7 38 * int main() {
phungductung 0:aa3fc5ad02f7 39 * while(1) {
phungductung 0:aa3fc5ad02f7 40 * int pins = p.read();
phungductung 0:aa3fc5ad02f7 41 * if(pins) {
phungductung 0:aa3fc5ad02f7 42 * ind = 1;
phungductung 0:aa3fc5ad02f7 43 * } else {
phungductung 0:aa3fc5ad02f7 44 * ind = 0;
phungductung 0:aa3fc5ad02f7 45 * }
phungductung 0:aa3fc5ad02f7 46 * }
phungductung 0:aa3fc5ad02f7 47 * }
phungductung 0:aa3fc5ad02f7 48 * @endcode
phungductung 0:aa3fc5ad02f7 49 */
phungductung 0:aa3fc5ad02f7 50 class PortIn {
phungductung 0:aa3fc5ad02f7 51 public:
phungductung 0:aa3fc5ad02f7 52
phungductung 0:aa3fc5ad02f7 53 /** Create an PortIn, connected to the specified port
phungductung 0:aa3fc5ad02f7 54 *
phungductung 0:aa3fc5ad02f7 55 * @param port Port to connect to (Port0-Port5)
phungductung 0:aa3fc5ad02f7 56 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
phungductung 0:aa3fc5ad02f7 57 */
phungductung 0:aa3fc5ad02f7 58 PortIn(PortName port, int mask = 0xFFFFFFFF) {
phungductung 0:aa3fc5ad02f7 59 port_init(&_port, port, mask, PIN_INPUT);
phungductung 0:aa3fc5ad02f7 60 }
phungductung 0:aa3fc5ad02f7 61
phungductung 0:aa3fc5ad02f7 62 /** Read the value currently output on the port
phungductung 0:aa3fc5ad02f7 63 *
phungductung 0:aa3fc5ad02f7 64 * @returns
phungductung 0:aa3fc5ad02f7 65 * An integer with each bit corresponding to associated port pin setting
phungductung 0:aa3fc5ad02f7 66 */
phungductung 0:aa3fc5ad02f7 67 int read() {
phungductung 0:aa3fc5ad02f7 68 return port_read(&_port);
phungductung 0:aa3fc5ad02f7 69 }
phungductung 0:aa3fc5ad02f7 70
phungductung 0:aa3fc5ad02f7 71 /** Set the input pin mode
phungductung 0:aa3fc5ad02f7 72 *
phungductung 0:aa3fc5ad02f7 73 * @param mode PullUp, PullDown, PullNone, OpenDrain
phungductung 0:aa3fc5ad02f7 74 */
phungductung 0:aa3fc5ad02f7 75 void mode(PinMode mode) {
phungductung 0:aa3fc5ad02f7 76 port_mode(&_port, mode);
phungductung 0:aa3fc5ad02f7 77 }
phungductung 0:aa3fc5ad02f7 78
phungductung 0:aa3fc5ad02f7 79 /** A shorthand for read()
phungductung 0:aa3fc5ad02f7 80 */
phungductung 0:aa3fc5ad02f7 81 operator int() {
phungductung 0:aa3fc5ad02f7 82 return read();
phungductung 0:aa3fc5ad02f7 83 }
phungductung 0:aa3fc5ad02f7 84
phungductung 0:aa3fc5ad02f7 85 private:
phungductung 0:aa3fc5ad02f7 86 port_t _port;
phungductung 0:aa3fc5ad02f7 87 };
phungductung 0:aa3fc5ad02f7 88
phungductung 0:aa3fc5ad02f7 89 } // namespace mbed
phungductung 0:aa3fc5ad02f7 90
phungductung 0:aa3fc5ad02f7 91 #endif
phungductung 0:aa3fc5ad02f7 92
phungductung 0:aa3fc5ad02f7 93 #endif