不韋 呂 / F746_SD_Player_Demo

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Dependencies:   F746_GUI F746_SAI_IO SD_PlayerSkeleton

mbed_src_STM32F7/api/AnalogOut.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_ANALOGOUT_H
MikamiUitOpen 2:cf42e62a97dc 17 #define MBED_ANALOGOUT_H
MikamiUitOpen 2:cf42e62a97dc 18
MikamiUitOpen 2:cf42e62a97dc 19 #include "platform.h"
MikamiUitOpen 2:cf42e62a97dc 20
MikamiUitOpen 2:cf42e62a97dc 21 #if DEVICE_ANALOGOUT
MikamiUitOpen 2:cf42e62a97dc 22
MikamiUitOpen 2:cf42e62a97dc 23 #include "analogout_api.h"
MikamiUitOpen 2:cf42e62a97dc 24
MikamiUitOpen 2:cf42e62a97dc 25 namespace mbed {
MikamiUitOpen 2:cf42e62a97dc 26
MikamiUitOpen 2:cf42e62a97dc 27 /** An analog output, used for setting the voltage on a pin
MikamiUitOpen 2:cf42e62a97dc 28 *
MikamiUitOpen 2:cf42e62a97dc 29 * Example:
MikamiUitOpen 2:cf42e62a97dc 30 * @code
MikamiUitOpen 2:cf42e62a97dc 31 * // Make a sawtooth output
MikamiUitOpen 2:cf42e62a97dc 32 *
MikamiUitOpen 2:cf42e62a97dc 33 * #include "mbed.h"
MikamiUitOpen 2:cf42e62a97dc 34 *
MikamiUitOpen 2:cf42e62a97dc 35 * AnalogOut tri(p18);
MikamiUitOpen 2:cf42e62a97dc 36 * int main() {
MikamiUitOpen 2:cf42e62a97dc 37 * while(1) {
MikamiUitOpen 2:cf42e62a97dc 38 * tri = tri + 0.01;
MikamiUitOpen 2:cf42e62a97dc 39 * wait_us(1);
MikamiUitOpen 2:cf42e62a97dc 40 * if(tri == 1) {
MikamiUitOpen 2:cf42e62a97dc 41 * tri = 0;
MikamiUitOpen 2:cf42e62a97dc 42 * }
MikamiUitOpen 2:cf42e62a97dc 43 * }
MikamiUitOpen 2:cf42e62a97dc 44 * }
MikamiUitOpen 2:cf42e62a97dc 45 * @endcode
MikamiUitOpen 2:cf42e62a97dc 46 */
MikamiUitOpen 2:cf42e62a97dc 47 class AnalogOut {
MikamiUitOpen 2:cf42e62a97dc 48
MikamiUitOpen 2:cf42e62a97dc 49 public:
MikamiUitOpen 2:cf42e62a97dc 50
MikamiUitOpen 2:cf42e62a97dc 51 /** Create an AnalogOut connected to the specified pin
MikamiUitOpen 2:cf42e62a97dc 52 *
MikamiUitOpen 2:cf42e62a97dc 53 * @param AnalogOut pin to connect to (18)
MikamiUitOpen 2:cf42e62a97dc 54 */
MikamiUitOpen 2:cf42e62a97dc 55 AnalogOut(PinName pin) {
MikamiUitOpen 2:cf42e62a97dc 56 analogout_init(&_dac, pin);
MikamiUitOpen 2:cf42e62a97dc 57 }
MikamiUitOpen 2:cf42e62a97dc 58
MikamiUitOpen 2:cf42e62a97dc 59 /** Set the output voltage, specified as a percentage (float)
MikamiUitOpen 2:cf42e62a97dc 60 *
MikamiUitOpen 2:cf42e62a97dc 61 * @param value A floating-point value representing the output voltage,
MikamiUitOpen 2:cf42e62a97dc 62 * specified as a percentage. The value should lie between
MikamiUitOpen 2:cf42e62a97dc 63 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
MikamiUitOpen 2:cf42e62a97dc 64 * Values outside this range will be saturated to 0.0f or 1.0f.
MikamiUitOpen 2:cf42e62a97dc 65 */
MikamiUitOpen 2:cf42e62a97dc 66 void write(float value) {
MikamiUitOpen 2:cf42e62a97dc 67 analogout_write(&_dac, value);
MikamiUitOpen 2:cf42e62a97dc 68 }
MikamiUitOpen 2:cf42e62a97dc 69
MikamiUitOpen 2:cf42e62a97dc 70 /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
MikamiUitOpen 2:cf42e62a97dc 71 *
MikamiUitOpen 2:cf42e62a97dc 72 * @param value 16-bit unsigned short representing the output voltage,
MikamiUitOpen 2:cf42e62a97dc 73 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
MikamiUitOpen 2:cf42e62a97dc 74 */
MikamiUitOpen 2:cf42e62a97dc 75 void write_u16(unsigned short value) {
MikamiUitOpen 2:cf42e62a97dc 76 analogout_write_u16(&_dac, value);
MikamiUitOpen 2:cf42e62a97dc 77 }
MikamiUitOpen 2:cf42e62a97dc 78
MikamiUitOpen 2:cf42e62a97dc 79 /** Return the current output voltage setting, measured as a percentage (float)
MikamiUitOpen 2:cf42e62a97dc 80 *
MikamiUitOpen 2:cf42e62a97dc 81 * @returns
MikamiUitOpen 2:cf42e62a97dc 82 * A floating-point value representing the current voltage being output on the pin,
MikamiUitOpen 2:cf42e62a97dc 83 * measured as a percentage. The returned value will lie between
MikamiUitOpen 2:cf42e62a97dc 84 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
MikamiUitOpen 2:cf42e62a97dc 85 *
MikamiUitOpen 2:cf42e62a97dc 86 * @note
MikamiUitOpen 2:cf42e62a97dc 87 * This value may not match exactly the value set by a previous write().
MikamiUitOpen 2:cf42e62a97dc 88 */
MikamiUitOpen 2:cf42e62a97dc 89 float read() {
MikamiUitOpen 2:cf42e62a97dc 90 return analogout_read(&_dac);
MikamiUitOpen 2:cf42e62a97dc 91 }
MikamiUitOpen 2:cf42e62a97dc 92
MikamiUitOpen 2:cf42e62a97dc 93 #ifdef MBED_OPERATORS
MikamiUitOpen 2:cf42e62a97dc 94 /** An operator shorthand for write()
MikamiUitOpen 2:cf42e62a97dc 95 */
MikamiUitOpen 2:cf42e62a97dc 96 AnalogOut& operator= (float percent) {
MikamiUitOpen 2:cf42e62a97dc 97 write(percent);
MikamiUitOpen 2:cf42e62a97dc 98 return *this;
MikamiUitOpen 2:cf42e62a97dc 99 }
MikamiUitOpen 2:cf42e62a97dc 100
MikamiUitOpen 2:cf42e62a97dc 101 AnalogOut& operator= (AnalogOut& rhs) {
MikamiUitOpen 2:cf42e62a97dc 102 write(rhs.read());
MikamiUitOpen 2:cf42e62a97dc 103 return *this;
MikamiUitOpen 2:cf42e62a97dc 104 }
MikamiUitOpen 2:cf42e62a97dc 105
MikamiUitOpen 2:cf42e62a97dc 106 /** An operator shorthand for read()
MikamiUitOpen 2:cf42e62a97dc 107 */
MikamiUitOpen 2:cf42e62a97dc 108 operator float() {
MikamiUitOpen 2:cf42e62a97dc 109 return read();
MikamiUitOpen 2:cf42e62a97dc 110 }
MikamiUitOpen 2:cf42e62a97dc 111 #endif
MikamiUitOpen 2:cf42e62a97dc 112
MikamiUitOpen 2:cf42e62a97dc 113 protected:
MikamiUitOpen 2:cf42e62a97dc 114 dac_t _dac;
MikamiUitOpen 2:cf42e62a97dc 115 };
MikamiUitOpen 2:cf42e62a97dc 116
MikamiUitOpen 2:cf42e62a97dc 117 } // namespace mbed
MikamiUitOpen 2:cf42e62a97dc 118
MikamiUitOpen 2:cf42e62a97dc 119 #endif
MikamiUitOpen 2:cf42e62a97dc 120
MikamiUitOpen 2:cf42e62a97dc 121 #endif