Mark Turner / MarksMbed

This is a repository for all my programs or modified programs.

AnalogOut.h@0:72480818e4a9, 2016-09-11 (annotated)

Committer:
mturner5
Date:
Sun Sep 11 23:48:09 2016 +0000
Revision:
0:72480818e4a9
Made delays for the LEDS and button presses

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mturner5 0:72480818e4a9 1 /* mbed Microcontroller Library
mturner5 0:72480818e4a9 2 * Copyright (c) 2006-2013 ARM Limited
mturner5 0:72480818e4a9 3 *
mturner5 0:72480818e4a9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mturner5 0:72480818e4a9 5 * you may not use this file except in compliance with the License.
mturner5 0:72480818e4a9 6 * You may obtain a copy of the License at
mturner5 0:72480818e4a9 7 *
mturner5 0:72480818e4a9 8 * http://www.apache.org/licenses/LICENSE-2.0
mturner5 0:72480818e4a9 9 *
mturner5 0:72480818e4a9 10 * Unless required by applicable law or agreed to in writing, software
mturner5 0:72480818e4a9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mturner5 0:72480818e4a9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mturner5 0:72480818e4a9 13 * See the License for the specific language governing permissions and
mturner5 0:72480818e4a9 14 * limitations under the License.
mturner5 0:72480818e4a9 15 */
mturner5 0:72480818e4a9 16 #ifndef MBED_ANALOGOUT_H
mturner5 0:72480818e4a9 17 #define MBED_ANALOGOUT_H
mturner5 0:72480818e4a9 18
mturner5 0:72480818e4a9 19 #include "platform.h"
mturner5 0:72480818e4a9 20
mturner5 0:72480818e4a9 21 #if DEVICE_ANALOGOUT
mturner5 0:72480818e4a9 22
mturner5 0:72480818e4a9 23 #include "analogout_api.h"
mturner5 0:72480818e4a9 24
mturner5 0:72480818e4a9 25 namespace mbed {
mturner5 0:72480818e4a9 26
mturner5 0:72480818e4a9 27 /** An analog output, used for setting the voltage on a pin
mturner5 0:72480818e4a9 28 *
mturner5 0:72480818e4a9 29 * Example:
mturner5 0:72480818e4a9 30 * @code
mturner5 0:72480818e4a9 31 * // Make a sawtooth output
mturner5 0:72480818e4a9 32 *
mturner5 0:72480818e4a9 33 * #include "mbed.h"
mturner5 0:72480818e4a9 34 *
mturner5 0:72480818e4a9 35 * AnalogOut tri(p18);
mturner5 0:72480818e4a9 36 * int main() {
mturner5 0:72480818e4a9 37 * while(1) {
mturner5 0:72480818e4a9 38 * tri = tri + 0.01;
mturner5 0:72480818e4a9 39 * wait_us(1);
mturner5 0:72480818e4a9 40 * if(tri == 1) {
mturner5 0:72480818e4a9 41 * tri = 0;
mturner5 0:72480818e4a9 42 * }
mturner5 0:72480818e4a9 43 * }
mturner5 0:72480818e4a9 44 * }
mturner5 0:72480818e4a9 45 * @endcode
mturner5 0:72480818e4a9 46 */
mturner5 0:72480818e4a9 47 class AnalogOut {
mturner5 0:72480818e4a9 48
mturner5 0:72480818e4a9 49 public:
mturner5 0:72480818e4a9 50
mturner5 0:72480818e4a9 51 /** Create an AnalogOut connected to the specified pin
mturner5 0:72480818e4a9 52 *
mturner5 0:72480818e4a9 53 * @param AnalogOut pin to connect to (18)
mturner5 0:72480818e4a9 54 */
mturner5 0:72480818e4a9 55 AnalogOut(PinName pin) {
mturner5 0:72480818e4a9 56 analogout_init(&_dac, pin);
mturner5 0:72480818e4a9 57 }
mturner5 0:72480818e4a9 58
mturner5 0:72480818e4a9 59 /** Set the output voltage, specified as a percentage (float)
mturner5 0:72480818e4a9 60 *
mturner5 0:72480818e4a9 61 * @param value A floating-point value representing the output voltage,
mturner5 0:72480818e4a9 62 * specified as a percentage. The value should lie between
mturner5 0:72480818e4a9 63 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
mturner5 0:72480818e4a9 64 * Values outside this range will be saturated to 0.0f or 1.0f.
mturner5 0:72480818e4a9 65 */
mturner5 0:72480818e4a9 66 void write(float value) {
mturner5 0:72480818e4a9 67 analogout_write(&_dac, value);
mturner5 0:72480818e4a9 68 }
mturner5 0:72480818e4a9 69
mturner5 0:72480818e4a9 70 /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
mturner5 0:72480818e4a9 71 *
mturner5 0:72480818e4a9 72 * @param value 16-bit unsigned short representing the output voltage,
mturner5 0:72480818e4a9 73 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
mturner5 0:72480818e4a9 74 */
mturner5 0:72480818e4a9 75 void write_u16(unsigned short value) {
mturner5 0:72480818e4a9 76 analogout_write_u16(&_dac, value);
mturner5 0:72480818e4a9 77 }
mturner5 0:72480818e4a9 78
mturner5 0:72480818e4a9 79 /** Return the current output voltage setting, measured as a percentage (float)
mturner5 0:72480818e4a9 80 *
mturner5 0:72480818e4a9 81 * @returns
mturner5 0:72480818e4a9 82 * A floating-point value representing the current voltage being output on the pin,
mturner5 0:72480818e4a9 83 * measured as a percentage. The returned value will lie between
mturner5 0:72480818e4a9 84 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
mturner5 0:72480818e4a9 85 *
mturner5 0:72480818e4a9 86 * @note
mturner5 0:72480818e4a9 87 * This value may not match exactly the value set by a previous write().
mturner5 0:72480818e4a9 88 */
mturner5 0:72480818e4a9 89 float read() {
mturner5 0:72480818e4a9 90 return analogout_read(&_dac);
mturner5 0:72480818e4a9 91 }
mturner5 0:72480818e4a9 92
mturner5 0:72480818e4a9 93 #ifdef MBED_OPERATORS
mturner5 0:72480818e4a9 94 /** An operator shorthand for write()
mturner5 0:72480818e4a9 95 */
mturner5 0:72480818e4a9 96 AnalogOut& operator= (float percent) {
mturner5 0:72480818e4a9 97 write(percent);
mturner5 0:72480818e4a9 98 return *this;
mturner5 0:72480818e4a9 99 }
mturner5 0:72480818e4a9 100
mturner5 0:72480818e4a9 101 AnalogOut& operator= (AnalogOut& rhs) {
mturner5 0:72480818e4a9 102 write(rhs.read());
mturner5 0:72480818e4a9 103 return *this;
mturner5 0:72480818e4a9 104 }
mturner5 0:72480818e4a9 105
mturner5 0:72480818e4a9 106 /** An operator shorthand for read()
mturner5 0:72480818e4a9 107 */
mturner5 0:72480818e4a9 108 operator float() {
mturner5 0:72480818e4a9 109 return read();
mturner5 0:72480818e4a9 110 }
mturner5 0:72480818e4a9 111 #endif
mturner5 0:72480818e4a9 112
mturner5 0:72480818e4a9 113 protected:
mturner5 0:72480818e4a9 114 dac_t _dac;
mturner5 0:72480818e4a9 115 };
mturner5 0:72480818e4a9 116
mturner5 0:72480818e4a9 117 } // namespace mbed
mturner5 0:72480818e4a9 118
mturner5 0:72480818e4a9 119 #endif
mturner5 0:72480818e4a9 120
mturner5 0:72480818e4a9 121 #endif