不韋 呂 / F746_SD_Player_Demo

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Dependencies:   F746_GUI F746_SAI_IO SD_PlayerSkeleton

mbed_src_STM32F7/api/AnalogIn.h@19:3c3833ec00d2, 2017-04-09 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Apr 09 12:44:17 2017 +0000
Revision:
19:3c3833ec00d2
Parent:
2:cf42e62a97dc 
20

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:cf42e62a97dc 1 /* mbed Microcontroller Library
MikamiUitOpen 2:cf42e62a97dc 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 2:cf42e62a97dc 3 *
MikamiUitOpen 2:cf42e62a97dc 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:cf42e62a97dc 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:cf42e62a97dc 6 * You may obtain a copy of the License at
MikamiUitOpen 2:cf42e62a97dc 7 *
MikamiUitOpen 2:cf42e62a97dc 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:cf42e62a97dc 9 *
MikamiUitOpen 2:cf42e62a97dc 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:cf42e62a97dc 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:cf42e62a97dc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:cf42e62a97dc 13 * See the License for the specific language governing permissions and
MikamiUitOpen 2:cf42e62a97dc 14 * limitations under the License.
MikamiUitOpen 2:cf42e62a97dc 15 */
MikamiUitOpen 2:cf42e62a97dc 16 #ifndef MBED_ANALOGIN_H
MikamiUitOpen 2:cf42e62a97dc 17 #define MBED_ANALOGIN_H
MikamiUitOpen 2:cf42e62a97dc 18
MikamiUitOpen 2:cf42e62a97dc 19 #include "platform.h"
MikamiUitOpen 2:cf42e62a97dc 20
MikamiUitOpen 2:cf42e62a97dc 21 #if DEVICE_ANALOGIN
MikamiUitOpen 2:cf42e62a97dc 22
MikamiUitOpen 2:cf42e62a97dc 23 #include "analogin_api.h"
MikamiUitOpen 2:cf42e62a97dc 24
MikamiUitOpen 2:cf42e62a97dc 25 namespace mbed {
MikamiUitOpen 2:cf42e62a97dc 26
MikamiUitOpen 2:cf42e62a97dc 27 /** An analog input, used for reading the voltage on a pin
MikamiUitOpen 2:cf42e62a97dc 28 *
MikamiUitOpen 2:cf42e62a97dc 29 * Example:
MikamiUitOpen 2:cf42e62a97dc 30 * @code
MikamiUitOpen 2:cf42e62a97dc 31 * // Print messages when the AnalogIn is greater than 50%
MikamiUitOpen 2:cf42e62a97dc 32 *
MikamiUitOpen 2:cf42e62a97dc 33 * #include "mbed.h"
MikamiUitOpen 2:cf42e62a97dc 34 *
MikamiUitOpen 2:cf42e62a97dc 35 * AnalogIn temperature(p20);
MikamiUitOpen 2:cf42e62a97dc 36 *
MikamiUitOpen 2:cf42e62a97dc 37 * int main() {
MikamiUitOpen 2:cf42e62a97dc 38 * while(1) {
MikamiUitOpen 2:cf42e62a97dc 39 * if(temperature > 0.5) {
MikamiUitOpen 2:cf42e62a97dc 40 * printf("Too hot! (%f)", temperature.read());
MikamiUitOpen 2:cf42e62a97dc 41 * }
MikamiUitOpen 2:cf42e62a97dc 42 * }
MikamiUitOpen 2:cf42e62a97dc 43 * }
MikamiUitOpen 2:cf42e62a97dc 44 * @endcode
MikamiUitOpen 2:cf42e62a97dc 45 */
MikamiUitOpen 2:cf42e62a97dc 46 class AnalogIn {
MikamiUitOpen 2:cf42e62a97dc 47
MikamiUitOpen 2:cf42e62a97dc 48 public:
MikamiUitOpen 2:cf42e62a97dc 49
MikamiUitOpen 2:cf42e62a97dc 50 /** Create an AnalogIn, connected to the specified pin
MikamiUitOpen 2:cf42e62a97dc 51 *
MikamiUitOpen 2:cf42e62a97dc 52 * @param pin AnalogIn pin to connect to
MikamiUitOpen 2:cf42e62a97dc 53 * @param name (optional) A string to identify the object
MikamiUitOpen 2:cf42e62a97dc 54 */
MikamiUitOpen 2:cf42e62a97dc 55 AnalogIn(PinName pin) {
MikamiUitOpen 2:cf42e62a97dc 56 analogin_init(&_adc, pin);
MikamiUitOpen 2:cf42e62a97dc 57 }
MikamiUitOpen 2:cf42e62a97dc 58
MikamiUitOpen 2:cf42e62a97dc 59 /** Read the input voltage, represented as a float in the range [0.0, 1.0]
MikamiUitOpen 2:cf42e62a97dc 60 *
MikamiUitOpen 2:cf42e62a97dc 61 * @returns A floating-point value representing the current input voltage, measured as a percentage
MikamiUitOpen 2:cf42e62a97dc 62 */
MikamiUitOpen 2:cf42e62a97dc 63 float read() {
MikamiUitOpen 2:cf42e62a97dc 64 return analogin_read(&_adc);
MikamiUitOpen 2:cf42e62a97dc 65 }
MikamiUitOpen 2:cf42e62a97dc 66
MikamiUitOpen 2:cf42e62a97dc 67 /** Read the input voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
MikamiUitOpen 2:cf42e62a97dc 68 *
MikamiUitOpen 2:cf42e62a97dc 69 * @returns
MikamiUitOpen 2:cf42e62a97dc 70 * 16-bit unsigned short representing the current input voltage, normalised to a 16-bit value
MikamiUitOpen 2:cf42e62a97dc 71 */
MikamiUitOpen 2:cf42e62a97dc 72 unsigned short read_u16() {
MikamiUitOpen 2:cf42e62a97dc 73 return analogin_read_u16(&_adc);
MikamiUitOpen 2:cf42e62a97dc 74 }
MikamiUitOpen 2:cf42e62a97dc 75
MikamiUitOpen 2:cf42e62a97dc 76 #ifdef MBED_OPERATORS
MikamiUitOpen 2:cf42e62a97dc 77 /** An operator shorthand for read()
MikamiUitOpen 2:cf42e62a97dc 78 *
MikamiUitOpen 2:cf42e62a97dc 79 * The float() operator can be used as a shorthand for read() to simplify common code sequences
MikamiUitOpen 2:cf42e62a97dc 80 *
MikamiUitOpen 2:cf42e62a97dc 81 * Example:
MikamiUitOpen 2:cf42e62a97dc 82 * @code
MikamiUitOpen 2:cf42e62a97dc 83 * float x = volume.read();
MikamiUitOpen 2:cf42e62a97dc 84 * float x = volume;
MikamiUitOpen 2:cf42e62a97dc 85 *
MikamiUitOpen 2:cf42e62a97dc 86 * if(volume.read() > 0.25) { ... }
MikamiUitOpen 2:cf42e62a97dc 87 * if(volume > 0.25) { ... }
MikamiUitOpen 2:cf42e62a97dc 88 * @endcode
MikamiUitOpen 2:cf42e62a97dc 89 */
MikamiUitOpen 2:cf42e62a97dc 90 operator float() {
MikamiUitOpen 2:cf42e62a97dc 91 return read();
MikamiUitOpen 2:cf42e62a97dc 92 }
MikamiUitOpen 2:cf42e62a97dc 93 #endif
MikamiUitOpen 2:cf42e62a97dc 94
MikamiUitOpen 2:cf42e62a97dc 95 protected:
MikamiUitOpen 2:cf42e62a97dc 96 analogin_t _adc;
MikamiUitOpen 2:cf42e62a97dc 97 };
MikamiUitOpen 2:cf42e62a97dc 98
MikamiUitOpen 2:cf42e62a97dc 99 } // namespace mbed
MikamiUitOpen 2:cf42e62a97dc 100
MikamiUitOpen 2:cf42e62a97dc 101 #endif
MikamiUitOpen 2:cf42e62a97dc 102
MikamiUitOpen 2:cf42e62a97dc 103 #endif