CQ Publishing / Mbed 2 deprecated tg_201410s9_FG

Transistor Gijutsu, October 2014, Special Features Chapter 9， Software of the Function Generator トランジスタ技術2014年10月号　特集第9章のソフトウェア わがまま波形発生器のソフトウェア

Dependencies:   USBDevice mbed

Information

tg_201410s8_AD7714 トランジスタ技術 2014年 10月号 第9章のソフトウェア

Program for Section 9 in October. 2014 issue of the Transistor Gijutsu
(Japanese electronics magazine)

概要

このプログラムは、ソフトウエアDDSにより、任意の波形を出力（2ch）します。 特徴は次のとおりです。

  • PWM出力をDAコンバータとして利用します。
  • 周波数や波形、バースト条件などを個別に設定できる独立した出力を２チャネル持っています。
  • 周波数分解能0.023ｍHz
  • 周波数範囲0.023ｍHz～１０ｋHz
  • 各チャネルにそれぞれ、波形の先頭で出力されるトリガ出力があります。
  • 出力波形を関数で定義できます。
  • 休止波数、出力波数、を設定することでバースト波形が出力できます。

ファイル

このソフトウエアは、次のファイルから構成されています。

  • DDS.cpp - DDSによる波形発生
  • main.cpp - main()関数

詳細については、10月号の記事および上記ファイル中のコメントを参照してください。

USBDevice/USBMIDI/MIDIMessage.h@0:f1ecca559ec3, 2014-08-29 (annotated)

Committer:
Dance
Date:
Fri Aug 29 08:33:17 2014 +0000
Revision:
0:f1ecca559ec3
Transistor Gijutsu, October 2014, Special Features Chapter 9; ????????2014?10??????9????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Dance 0:f1ecca559ec3 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
Dance 0:f1ecca559ec3 2 *
Dance 0:f1ecca559ec3 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Dance 0:f1ecca559ec3 4 * and associated documentation files (the "Software"), to deal in the Software without
Dance 0:f1ecca559ec3 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
Dance 0:f1ecca559ec3 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
Dance 0:f1ecca559ec3 7 * Software is furnished to do so, subject to the following conditions:
Dance 0:f1ecca559ec3 8 *
Dance 0:f1ecca559ec3 9 * The above copyright notice and this permission notice shall be included in all copies or
Dance 0:f1ecca559ec3 10 * substantial portions of the Software.
Dance 0:f1ecca559ec3 11 *
Dance 0:f1ecca559ec3 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Dance 0:f1ecca559ec3 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Dance 0:f1ecca559ec3 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Dance 0:f1ecca559ec3 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Dance 0:f1ecca559ec3 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Dance 0:f1ecca559ec3 17 */
Dance 0:f1ecca559ec3 18
Dance 0:f1ecca559ec3 19 #ifndef MIDIMESSAGE_H
Dance 0:f1ecca559ec3 20 #define MIDIMESSAGE_H
Dance 0:f1ecca559ec3 21
Dance 0:f1ecca559ec3 22 #include "mbed.h"
Dance 0:f1ecca559ec3 23
Dance 0:f1ecca559ec3 24 // MIDI Message Format
Dance 0:f1ecca559ec3 25 //
Dance 0:f1ecca559ec3 26 // [ msg(4) | channel(4) ] [ 0 | n(7) ] [ 0 | m(7) ]
Dance 0:f1ecca559ec3 27 //
Dance 0:f1ecca559ec3 28 // MIDI Data Messages (Channel Specific)
Dance 0:f1ecca559ec3 29 //
Dance 0:f1ecca559ec3 30 // Message msg n m
Dance 0:f1ecca559ec3 31 // ---------------------------------------------
Dance 0:f1ecca559ec3 32 // Note Off 0x8 Key Velocity
Dance 0:f1ecca559ec3 33 // Note On 0x9 Key Velocity
Dance 0:f1ecca559ec3 34 // Polyphonic Aftertouch 0xA Key Pressure
Dance 0:f1ecca559ec3 35 // Control Change 0xB Controller Value
Dance 0:f1ecca559ec3 36 // Program Change 0xC Program -
Dance 0:f1ecca559ec3 37 // Channel Aftertouch 0xD Pressure -
Dance 0:f1ecca559ec3 38 // Pitch Wheel 0xE LSB MSB
Dance 0:f1ecca559ec3 39
Dance 0:f1ecca559ec3 40 #define CABLE_NUM (0<<4)
Dance 0:f1ecca559ec3 41
Dance 0:f1ecca559ec3 42 /** A MIDI message container */
Dance 0:f1ecca559ec3 43 class MIDIMessage {
Dance 0:f1ecca559ec3 44 public:
Dance 0:f1ecca559ec3 45 MIDIMessage() {}
Dance 0:f1ecca559ec3 46
Dance 0:f1ecca559ec3 47 MIDIMessage(uint8_t *buf) {
Dance 0:f1ecca559ec3 48 for (int i = 0; i < 4; i++)
Dance 0:f1ecca559ec3 49 data[i] = buf[i];
Dance 0:f1ecca559ec3 50 }
Dance 0:f1ecca559ec3 51
Dance 0:f1ecca559ec3 52 // create messages
Dance 0:f1ecca559ec3 53
Dance 0:f1ecca559ec3 54 /** Create a NoteOff message
Dance 0:f1ecca559ec3 55 * @param key Key ID
Dance 0:f1ecca559ec3 56 * @param velocity Key velocity (0-127, default = 127)
Dance 0:f1ecca559ec3 57 * @param channel Key channel (0-15, default 0)
Dance 0:f1ecca559ec3 58 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 59 */
Dance 0:f1ecca559ec3 60 static MIDIMessage NoteOff(int key, int velocity = 127, int channel = 0) {
Dance 0:f1ecca559ec3 61 MIDIMessage msg;
Dance 0:f1ecca559ec3 62 msg.data[0] = CABLE_NUM | 0x08;
Dance 0:f1ecca559ec3 63 msg.data[1] = 0x80 | (channel & 0x0F);
Dance 0:f1ecca559ec3 64 msg.data[2] = key & 0x7F;
Dance 0:f1ecca559ec3 65 msg.data[3] = velocity & 0x7F;
Dance 0:f1ecca559ec3 66 return msg;
Dance 0:f1ecca559ec3 67 }
Dance 0:f1ecca559ec3 68
Dance 0:f1ecca559ec3 69 /** Create a NoteOn message
Dance 0:f1ecca559ec3 70 * @param key Key ID
Dance 0:f1ecca559ec3 71 * @param velocity Key velocity (0-127, default = 127)
Dance 0:f1ecca559ec3 72 * @param channel Key channel (0-15, default 0)
Dance 0:f1ecca559ec3 73 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 74 */
Dance 0:f1ecca559ec3 75 static MIDIMessage NoteOn(int key, int velocity = 127, int channel = 0) {
Dance 0:f1ecca559ec3 76 MIDIMessage msg;
Dance 0:f1ecca559ec3 77 msg.data[0] = CABLE_NUM | 0x09;
Dance 0:f1ecca559ec3 78 msg.data[1] = 0x90 | (channel & 0x0F);
Dance 0:f1ecca559ec3 79 msg.data[2] = key & 0x7F;
Dance 0:f1ecca559ec3 80 msg.data[3] = velocity & 0x7F;
Dance 0:f1ecca559ec3 81 return msg;
Dance 0:f1ecca559ec3 82 }
Dance 0:f1ecca559ec3 83
Dance 0:f1ecca559ec3 84 /** Create a PolyPhonic Aftertouch message
Dance 0:f1ecca559ec3 85 * @param key Key ID
Dance 0:f1ecca559ec3 86 * @param pressure Aftertouch pressure (0-127)
Dance 0:f1ecca559ec3 87 * @param channel Key channel (0-15, default 0)
Dance 0:f1ecca559ec3 88 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 89 */
Dance 0:f1ecca559ec3 90 static MIDIMessage PolyphonicAftertouch(int key, int pressure, int channel = 0) {
Dance 0:f1ecca559ec3 91 MIDIMessage msg;
Dance 0:f1ecca559ec3 92 msg.data[0] = CABLE_NUM | 0x0A;
Dance 0:f1ecca559ec3 93 msg.data[1] = 0xA0 | (channel & 0x0F);
Dance 0:f1ecca559ec3 94 msg.data[2] = key & 0x7F;
Dance 0:f1ecca559ec3 95 msg.data[3] = pressure & 0x7F;
Dance 0:f1ecca559ec3 96 return msg;
Dance 0:f1ecca559ec3 97 }
Dance 0:f1ecca559ec3 98
Dance 0:f1ecca559ec3 99 /** Create a Control Change message
Dance 0:f1ecca559ec3 100 * @param control Controller ID
Dance 0:f1ecca559ec3 101 * @param value Controller value (0-127)
Dance 0:f1ecca559ec3 102 * @param channel Controller channel (0-15, default 0)
Dance 0:f1ecca559ec3 103 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 104 */
Dance 0:f1ecca559ec3 105 static MIDIMessage ControlChange(int control, int value, int channel = 0) {
Dance 0:f1ecca559ec3 106 MIDIMessage msg;
Dance 0:f1ecca559ec3 107 msg.data[0] = CABLE_NUM | 0x0B;
Dance 0:f1ecca559ec3 108 msg.data[1] = 0xB0 | (channel & 0x0F);
Dance 0:f1ecca559ec3 109 msg.data[2] = control & 0x7F;
Dance 0:f1ecca559ec3 110 msg.data[3] = value & 0x7F;
Dance 0:f1ecca559ec3 111 return msg;
Dance 0:f1ecca559ec3 112 }
Dance 0:f1ecca559ec3 113
Dance 0:f1ecca559ec3 114 /** Create a Program Change message
Dance 0:f1ecca559ec3 115 * @param program Program ID
Dance 0:f1ecca559ec3 116 * @param channel Channel (0-15, default 0)
Dance 0:f1ecca559ec3 117 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 118 */
Dance 0:f1ecca559ec3 119 static MIDIMessage ProgramChange(int program, int channel = 0) {
Dance 0:f1ecca559ec3 120 MIDIMessage msg;
Dance 0:f1ecca559ec3 121 msg.data[0] = CABLE_NUM | 0x0C;
Dance 0:f1ecca559ec3 122 msg.data[1] = 0xC0 | (channel & 0x0F);
Dance 0:f1ecca559ec3 123 msg.data[2] = program & 0x7F;
Dance 0:f1ecca559ec3 124 msg.data[3] = 0x00;
Dance 0:f1ecca559ec3 125 return msg;
Dance 0:f1ecca559ec3 126 }
Dance 0:f1ecca559ec3 127
Dance 0:f1ecca559ec3 128 /** Create a Channel Aftertouch message
Dance 0:f1ecca559ec3 129 * @param pressure Pressure
Dance 0:f1ecca559ec3 130 * @param channel Key channel (0-15, default 0)
Dance 0:f1ecca559ec3 131 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 132 */
Dance 0:f1ecca559ec3 133 static MIDIMessage ChannelAftertouch(int pressure, int channel = 0) {
Dance 0:f1ecca559ec3 134 MIDIMessage msg;
Dance 0:f1ecca559ec3 135 msg.data[0] = CABLE_NUM | 0x0D;
Dance 0:f1ecca559ec3 136 msg.data[1] = 0xD0 | (channel & 0x0F);
Dance 0:f1ecca559ec3 137 msg.data[2] = pressure & 0x7F;
Dance 0:f1ecca559ec3 138 msg.data[3] = 0x00;
Dance 0:f1ecca559ec3 139 return msg;
Dance 0:f1ecca559ec3 140 }
Dance 0:f1ecca559ec3 141
Dance 0:f1ecca559ec3 142 /** Create a Pitch Wheel message
Dance 0:f1ecca559ec3 143 * @param pitch Pitch (-8192 - 8191, default = 0)
Dance 0:f1ecca559ec3 144 * @param channel Channel (0-15, default 0)
Dance 0:f1ecca559ec3 145 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 146 */
Dance 0:f1ecca559ec3 147 static MIDIMessage PitchWheel(int pitch = 0, int channel = 0) {
Dance 0:f1ecca559ec3 148 MIDIMessage msg;
Dance 0:f1ecca559ec3 149 int p = pitch + 8192; // 0 - 16383, 8192 is center
Dance 0:f1ecca559ec3 150 msg.data[0] = CABLE_NUM | 0x0E;
Dance 0:f1ecca559ec3 151 msg.data[1] = 0xE0 | (channel & 0x0F);
Dance 0:f1ecca559ec3 152 msg.data[2] = p & 0x7F;
Dance 0:f1ecca559ec3 153 msg.data[3] = (p >> 7) & 0x7F;
Dance 0:f1ecca559ec3 154 return msg;
Dance 0:f1ecca559ec3 155 }
Dance 0:f1ecca559ec3 156
Dance 0:f1ecca559ec3 157 /** Create an All Notes Off message
Dance 0:f1ecca559ec3 158 * @param channel Channel (0-15, default 0)
Dance 0:f1ecca559ec3 159 * @returns A MIDIMessage
Dance 0:f1ecca559ec3 160 */
Dance 0:f1ecca559ec3 161 static MIDIMessage AllNotesOff(int channel = 0) {
Dance 0:f1ecca559ec3 162 return ControlChange(123, 0, channel);
Dance 0:f1ecca559ec3 163 }
Dance 0:f1ecca559ec3 164
Dance 0:f1ecca559ec3 165 // decode messages
Dance 0:f1ecca559ec3 166
Dance 0:f1ecca559ec3 167 /** MIDI Message Types */
Dance 0:f1ecca559ec3 168 enum MIDIMessageType {
Dance 0:f1ecca559ec3 169 ErrorType,
Dance 0:f1ecca559ec3 170 NoteOffType,
Dance 0:f1ecca559ec3 171 NoteOnType,
Dance 0:f1ecca559ec3 172 PolyphonicAftertouchType,
Dance 0:f1ecca559ec3 173 ControlChangeType,
Dance 0:f1ecca559ec3 174 ProgramChangeType,
Dance 0:f1ecca559ec3 175 ChannelAftertouchType,
Dance 0:f1ecca559ec3 176 PitchWheelType,
Dance 0:f1ecca559ec3 177 AllNotesOffType
Dance 0:f1ecca559ec3 178 };
Dance 0:f1ecca559ec3 179
Dance 0:f1ecca559ec3 180 /** Read the message type
Dance 0:f1ecca559ec3 181 * @returns MIDIMessageType
Dance 0:f1ecca559ec3 182 */
Dance 0:f1ecca559ec3 183 MIDIMessageType type() {
Dance 0:f1ecca559ec3 184 switch((data[1] >> 4) & 0xF) {
Dance 0:f1ecca559ec3 185 case 0x8: return NoteOffType;
Dance 0:f1ecca559ec3 186 case 0x9: return NoteOnType;
Dance 0:f1ecca559ec3 187 case 0xA: return PolyphonicAftertouchType;
Dance 0:f1ecca559ec3 188 case 0xB:
Dance 0:f1ecca559ec3 189 if(controller() < 120) { // standard controllers
Dance 0:f1ecca559ec3 190 return ControlChangeType;
Dance 0:f1ecca559ec3 191 } else if(controller() == 123) {
Dance 0:f1ecca559ec3 192 return AllNotesOffType;
Dance 0:f1ecca559ec3 193 } else {
Dance 0:f1ecca559ec3 194 return ErrorType; // unsupported atm
Dance 0:f1ecca559ec3 195 }
Dance 0:f1ecca559ec3 196 case 0xC: return ProgramChangeType;
Dance 0:f1ecca559ec3 197 case 0xD: return ChannelAftertouchType;
Dance 0:f1ecca559ec3 198 case 0xE: return PitchWheelType;
Dance 0:f1ecca559ec3 199 default: return ErrorType;
Dance 0:f1ecca559ec3 200 }
Dance 0:f1ecca559ec3 201 }
Dance 0:f1ecca559ec3 202
Dance 0:f1ecca559ec3 203 /** Read the channel number */
Dance 0:f1ecca559ec3 204 int channel() {
Dance 0:f1ecca559ec3 205 return (data[1] & 0x0F);
Dance 0:f1ecca559ec3 206 }
Dance 0:f1ecca559ec3 207
Dance 0:f1ecca559ec3 208 /** Read the key ID */
Dance 0:f1ecca559ec3 209 int key() {
Dance 0:f1ecca559ec3 210 return (data[2] & 0x7F);
Dance 0:f1ecca559ec3 211 }
Dance 0:f1ecca559ec3 212
Dance 0:f1ecca559ec3 213 /** Read the velocity */
Dance 0:f1ecca559ec3 214 int velocity() {
Dance 0:f1ecca559ec3 215 return (data[3] & 0x7F);
Dance 0:f1ecca559ec3 216 }
Dance 0:f1ecca559ec3 217
Dance 0:f1ecca559ec3 218 /** Read the controller value */
Dance 0:f1ecca559ec3 219 int value() {
Dance 0:f1ecca559ec3 220 return (data[3] & 0x7F);
Dance 0:f1ecca559ec3 221 }
Dance 0:f1ecca559ec3 222
Dance 0:f1ecca559ec3 223 /** Read the aftertouch pressure */
Dance 0:f1ecca559ec3 224 int pressure() {
Dance 0:f1ecca559ec3 225 if(type() == PolyphonicAftertouchType) {
Dance 0:f1ecca559ec3 226 return (data[3] & 0x7F);
Dance 0:f1ecca559ec3 227 } else {
Dance 0:f1ecca559ec3 228 return (data[2] & 0x7F);
Dance 0:f1ecca559ec3 229 }
Dance 0:f1ecca559ec3 230 }
Dance 0:f1ecca559ec3 231
Dance 0:f1ecca559ec3 232 /** Read the controller number */
Dance 0:f1ecca559ec3 233 int controller() {
Dance 0:f1ecca559ec3 234 return (data[2] & 0x7F);
Dance 0:f1ecca559ec3 235 }
Dance 0:f1ecca559ec3 236
Dance 0:f1ecca559ec3 237 /** Read the program number */
Dance 0:f1ecca559ec3 238 int program() {
Dance 0:f1ecca559ec3 239 return (data[2] & 0x7F);
Dance 0:f1ecca559ec3 240 }
Dance 0:f1ecca559ec3 241
Dance 0:f1ecca559ec3 242 /** Read the pitch value */
Dance 0:f1ecca559ec3 243 int pitch() {
Dance 0:f1ecca559ec3 244 int p = ((data[3] & 0x7F) << 7) | (data[2] & 0x7F);
Dance 0:f1ecca559ec3 245 return p - 8192; // 0 - 16383, 8192 is center
Dance 0:f1ecca559ec3 246 }
Dance 0:f1ecca559ec3 247
Dance 0:f1ecca559ec3 248 uint8_t data[4];
Dance 0:f1ecca559ec3 249 };
Dance 0:f1ecca559ec3 250
Dance 0:f1ecca559ec3 251 #endif