Radio Junk Box
/
KAMUI_MIDI-CV_Example
KAMUI MIDI-CV Example
main.cpp@0:25a282f1141a, 2012-05-05 (annotated)
- Committer:
- radiojunkbox
- Date:
- Sat May 05 11:35:41 2012 +0000
- Revision:
- 0:25a282f1141a
Rev. 1.0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
radiojunkbox | 0:25a282f1141a | 1 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 2 | // KAMUI MIDI-CV Exapmple |
radiojunkbox | 0:25a282f1141a | 3 | // Copyright (C) 2012 RJB RadioJunkBox |
radiojunkbox | 0:25a282f1141a | 4 | // Released under the MIT License: http://mbed.org/license/mit |
radiojunkbox | 0:25a282f1141a | 5 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 6 | |
radiojunkbox | 0:25a282f1141a | 7 | #include "mbed.h" |
radiojunkbox | 0:25a282f1141a | 8 | #include "TextLCD.h" |
radiojunkbox | 0:25a282f1141a | 9 | #include <stdlib.h> |
radiojunkbox | 0:25a282f1141a | 10 | #include <math.h> |
radiojunkbox | 0:25a282f1141a | 11 | |
radiojunkbox | 0:25a282f1141a | 12 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 13 | // Define |
radiojunkbox | 0:25a282f1141a | 14 | |
radiojunkbox | 0:25a282f1141a | 15 | #define AD5551 // 14bitDAC |
radiojunkbox | 0:25a282f1141a | 16 | |
radiojunkbox | 0:25a282f1141a | 17 | #define SPI_RATE 1000000 // 1Mbps |
radiojunkbox | 0:25a282f1141a | 18 | #define MIDI_RATE 31250 // 31.25kbps |
radiojunkbox | 0:25a282f1141a | 19 | #define BEEP_FREQ 1760.0 // 1760Hz |
radiojunkbox | 0:25a282f1141a | 20 | #define UPDATE_INTERVAL 100 // 100us |
radiojunkbox | 0:25a282f1141a | 21 | #define SW_WATCH_INTERVAL (25000/UPDATE_INTERVAL) // 25ms |
radiojunkbox | 0:25a282f1141a | 22 | #define PARAM_GLIDE 6554.0 |
radiojunkbox | 0:25a282f1141a | 23 | #define PARAM_DP 6912.0 // UPDATE_INTERVAL = 100us |
radiojunkbox | 0:25a282f1141a | 24 | //#define PARAM_DP 8192.0 // UPDATE_INTERVAL = 50us |
radiojunkbox | 0:25a282f1141a | 25 | |
radiojunkbox | 0:25a282f1141a | 26 | #define UPDATE_MODE0 0 // Update Interval CV ch1-6 1200us, ch7,8 400us |
radiojunkbox | 0:25a282f1141a | 27 | #define UPDATE_MODE1 1 // Update Interval CV ch1-6 N/A, ch7,8 200us |
radiojunkbox | 0:25a282f1141a | 28 | |
radiojunkbox | 0:25a282f1141a | 29 | #define GATE1 0x01 |
radiojunkbox | 0:25a282f1141a | 30 | #define GATE2 0x02 |
radiojunkbox | 0:25a282f1141a | 31 | #define GATE3 0x04 |
radiojunkbox | 0:25a282f1141a | 32 | #define GATE4 0x08 |
radiojunkbox | 0:25a282f1141a | 33 | |
radiojunkbox | 0:25a282f1141a | 34 | #define SYNC1CLK 0x01 |
radiojunkbox | 0:25a282f1141a | 35 | #define SYNC1RUN 0x02 |
radiojunkbox | 0:25a282f1141a | 36 | #define SYNC2CLK 0x04 |
radiojunkbox | 0:25a282f1141a | 37 | #define SYNC2RUN 0x08 |
radiojunkbox | 0:25a282f1141a | 38 | |
radiojunkbox | 0:25a282f1141a | 39 | #define MODE_CV 0x00 |
radiojunkbox | 0:25a282f1141a | 40 | #define MODE_GATE 0x40 |
radiojunkbox | 0:25a282f1141a | 41 | #define MODE_SYNC 0x80 |
radiojunkbox | 0:25a282f1141a | 42 | #define MODE_SET_SYNC 0xC0 |
radiojunkbox | 0:25a282f1141a | 43 | |
radiojunkbox | 0:25a282f1141a | 44 | #define SW1 0x01 |
radiojunkbox | 0:25a282f1141a | 45 | #define SW2 0x02 |
radiojunkbox | 0:25a282f1141a | 46 | #define SW3 0x04 |
radiojunkbox | 0:25a282f1141a | 47 | #define SW4 0x08 |
radiojunkbox | 0:25a282f1141a | 48 | #define SYNC1CLK_IN 0x10 |
radiojunkbox | 0:25a282f1141a | 49 | #define SYNC1RUN_IN 0x20 |
radiojunkbox | 0:25a282f1141a | 50 | #define SYNC2CLK_IN 0x40 |
radiojunkbox | 0:25a282f1141a | 51 | #define GATE_IN 0x80 |
radiojunkbox | 0:25a282f1141a | 52 | |
radiojunkbox | 0:25a282f1141a | 53 | #define _ENABLE 0 |
radiojunkbox | 0:25a282f1141a | 54 | #define _DISABLE 1 |
radiojunkbox | 0:25a282f1141a | 55 | |
radiojunkbox | 0:25a282f1141a | 56 | #define BUFSIZE 32 // size of ring buffer (ex 4,8,16,32...) |
radiojunkbox | 0:25a282f1141a | 57 | #define LFO_WF_TRI 0 |
radiojunkbox | 0:25a282f1141a | 58 | #define LFO_WF_SQR 1 |
radiojunkbox | 0:25a282f1141a | 59 | #define LFO_WF_SAW 2 |
radiojunkbox | 0:25a282f1141a | 60 | #define LFO_WF_NONE 3 |
radiojunkbox | 0:25a282f1141a | 61 | #define MINIMUMNOTE 12 |
radiojunkbox | 0:25a282f1141a | 62 | #define SYNC_TURN_TIME (5000/UPDATE_INTERVAL) // 5ms |
radiojunkbox | 0:25a282f1141a | 63 | |
radiojunkbox | 0:25a282f1141a | 64 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 65 | // Functions |
radiojunkbox | 0:25a282f1141a | 66 | |
radiojunkbox | 0:25a282f1141a | 67 | void InitKamui(void); |
radiojunkbox | 0:25a282f1141a | 68 | void UpdateCV(void); |
radiojunkbox | 0:25a282f1141a | 69 | unsigned char CheckSW(unsigned char); |
radiojunkbox | 0:25a282f1141a | 70 | |
radiojunkbox | 0:25a282f1141a | 71 | void RcvMIDI(void); |
radiojunkbox | 0:25a282f1141a | 72 | void MidiCV(void); |
radiojunkbox | 0:25a282f1141a | 73 | void CalcHzVTbl(void); |
radiojunkbox | 0:25a282f1141a | 74 | unsigned short OctVtoHzV(unsigned short); |
radiojunkbox | 0:25a282f1141a | 75 | void DinSync(void); |
radiojunkbox | 0:25a282f1141a | 76 | extern void MIDI_Parser(unsigned char); |
radiojunkbox | 0:25a282f1141a | 77 | |
radiojunkbox | 0:25a282f1141a | 78 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 79 | // Global Variables |
radiojunkbox | 0:25a282f1141a | 80 | |
radiojunkbox | 0:25a282f1141a | 81 | int gUpdateMode; |
radiojunkbox | 0:25a282f1141a | 82 | unsigned short gCV[8]; |
radiojunkbox | 0:25a282f1141a | 83 | unsigned char gGATE; |
radiojunkbox | 0:25a282f1141a | 84 | unsigned char gSYNC; |
radiojunkbox | 0:25a282f1141a | 85 | unsigned char gSW; |
radiojunkbox | 0:25a282f1141a | 86 | |
radiojunkbox | 0:25a282f1141a | 87 | union { |
radiojunkbox | 0:25a282f1141a | 88 | unsigned short WORD; |
radiojunkbox | 0:25a282f1141a | 89 | struct { |
radiojunkbox | 0:25a282f1141a | 90 | unsigned char L; |
radiojunkbox | 0:25a282f1141a | 91 | unsigned char H; |
radiojunkbox | 0:25a282f1141a | 92 | } BYTE; |
radiojunkbox | 0:25a282f1141a | 93 | } gDAC; |
radiojunkbox | 0:25a282f1141a | 94 | |
radiojunkbox | 0:25a282f1141a | 95 | int gPtr_buf_in, gPtr_buf_out; |
radiojunkbox | 0:25a282f1141a | 96 | unsigned char gRxBuf[BUFSIZE]; |
radiojunkbox | 0:25a282f1141a | 97 | |
radiojunkbox | 0:25a282f1141a | 98 | float gGLIDE[4]; |
radiojunkbox | 0:25a282f1141a | 99 | unsigned short gLFO_DP[4]; |
radiojunkbox | 0:25a282f1141a | 100 | unsigned char gLFO_FORM[4]; |
radiojunkbox | 0:25a282f1141a | 101 | unsigned char gMIDI_CH[4]; |
radiojunkbox | 0:25a282f1141a | 102 | short gTblHzV[3072]; |
radiojunkbox | 0:25a282f1141a | 103 | |
radiojunkbox | 0:25a282f1141a | 104 | extern unsigned char gPlayNoteBuf[]; |
radiojunkbox | 0:25a282f1141a | 105 | extern unsigned char gGateBuf[]; |
radiojunkbox | 0:25a282f1141a | 106 | extern unsigned char gPitchBendBuf[]; |
radiojunkbox | 0:25a282f1141a | 107 | extern unsigned char gModWheelBuf[]; |
radiojunkbox | 0:25a282f1141a | 108 | extern unsigned char gMIDISYNC_CLK; |
radiojunkbox | 0:25a282f1141a | 109 | extern unsigned char gMIDISYNC_RUN; |
radiojunkbox | 0:25a282f1141a | 110 | |
radiojunkbox | 0:25a282f1141a | 111 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 112 | // mbed Functions |
radiojunkbox | 0:25a282f1141a | 113 | |
radiojunkbox | 0:25a282f1141a | 114 | // TextLCD |
radiojunkbox | 0:25a282f1141a | 115 | TextLCD gLCD(p23, p24, p25, p26, p29, p30); // rs, e, d4-d7 |
radiojunkbox | 0:25a282f1141a | 116 | |
radiojunkbox | 0:25a282f1141a | 117 | // SPI |
radiojunkbox | 0:25a282f1141a | 118 | SPI gSPI(p11,p12,p13); |
radiojunkbox | 0:25a282f1141a | 119 | DigitalOut gCSA(p14); |
radiojunkbox | 0:25a282f1141a | 120 | DigitalOut gCSB(p22); |
radiojunkbox | 0:25a282f1141a | 121 | |
radiojunkbox | 0:25a282f1141a | 122 | // Sirial MIDI |
radiojunkbox | 0:25a282f1141a | 123 | Serial gMIDI(p9,p10); |
radiojunkbox | 0:25a282f1141a | 124 | |
radiojunkbox | 0:25a282f1141a | 125 | // AnalogIn |
radiojunkbox | 0:25a282f1141a | 126 | AnalogIn gAIN1(p15); // VR1 |
radiojunkbox | 0:25a282f1141a | 127 | AnalogIn gAIN2(p16); // VR2 |
radiojunkbox | 0:25a282f1141a | 128 | AnalogIn gAIN3(p17); // VR3 |
radiojunkbox | 0:25a282f1141a | 129 | AnalogIn gAIN4(p18); // VR4 |
radiojunkbox | 0:25a282f1141a | 130 | AnalogIn gAIN5(p19); // IN1 |
radiojunkbox | 0:25a282f1141a | 131 | AnalogIn gAIN6(p20); // IN2 |
radiojunkbox | 0:25a282f1141a | 132 | |
radiojunkbox | 0:25a282f1141a | 133 | // BEEP |
radiojunkbox | 0:25a282f1141a | 134 | PwmOut gBEEP(p21); |
radiojunkbox | 0:25a282f1141a | 135 | |
radiojunkbox | 0:25a282f1141a | 136 | // LED |
radiojunkbox | 0:25a282f1141a | 137 | DigitalOut gLED1(LED1); |
radiojunkbox | 0:25a282f1141a | 138 | DigitalOut gLED2(LED2); |
radiojunkbox | 0:25a282f1141a | 139 | DigitalOut gLED3(LED3); |
radiojunkbox | 0:25a282f1141a | 140 | DigitalOut gLED4(LED4); |
radiojunkbox | 0:25a282f1141a | 141 | BusOut gLEDS(LED1,LED2,LED3,LED4); |
radiojunkbox | 0:25a282f1141a | 142 | |
radiojunkbox | 0:25a282f1141a | 143 | // Ticker |
radiojunkbox | 0:25a282f1141a | 144 | Ticker gTICKER; |
radiojunkbox | 0:25a282f1141a | 145 | |
radiojunkbox | 0:25a282f1141a | 146 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 147 | // main |
radiojunkbox | 0:25a282f1141a | 148 | |
radiojunkbox | 0:25a282f1141a | 149 | int main() { |
radiojunkbox | 0:25a282f1141a | 150 | |
radiojunkbox | 0:25a282f1141a | 151 | int i; |
radiojunkbox | 0:25a282f1141a | 152 | int pot[4],_pot[4]; |
radiojunkbox | 0:25a282f1141a | 153 | unsigned char rb; |
radiojunkbox | 0:25a282f1141a | 154 | unsigned char ch = 0; |
radiojunkbox | 0:25a282f1141a | 155 | unsigned char mode = 7; // for Intialize |
radiojunkbox | 0:25a282f1141a | 156 | unsigned char edit[4]; |
radiojunkbox | 0:25a282f1141a | 157 | int val[2][4] = { 0, 0, 0, 0, 50, 50, 50, 50 }; |
radiojunkbox | 0:25a282f1141a | 158 | char *wave[4] = { "TR","SQ","SW","--" }; |
radiojunkbox | 0:25a282f1141a | 159 | |
radiojunkbox | 0:25a282f1141a | 160 | // Initialize |
radiojunkbox | 0:25a282f1141a | 161 | gPtr_buf_in = gPtr_buf_out = 0; |
radiojunkbox | 0:25a282f1141a | 162 | for( i=0; i<4; i++) { |
radiojunkbox | 0:25a282f1141a | 163 | pot[i] = _pot[i] = 0; |
radiojunkbox | 0:25a282f1141a | 164 | edit[i] = 0; |
radiojunkbox | 0:25a282f1141a | 165 | gGLIDE[i] = 1.0 / expf(val[0][i]*656.0/PARAM_GLIDE); |
radiojunkbox | 0:25a282f1141a | 166 | gLFO_DP[i] = expf(val[1][i]*656.0/PARAM_DP); |
radiojunkbox | 0:25a282f1141a | 167 | gLFO_FORM[i] = LFO_WF_TRI; |
radiojunkbox | 0:25a282f1141a | 168 | gMIDI_CH[i] = i; |
radiojunkbox | 0:25a282f1141a | 169 | } |
radiojunkbox | 0:25a282f1141a | 170 | |
radiojunkbox | 0:25a282f1141a | 171 | for( i=0; i<16; i++) { // MIDI Data Buffers |
radiojunkbox | 0:25a282f1141a | 172 | gPlayNoteBuf[i] =24; |
radiojunkbox | 0:25a282f1141a | 173 | gGateBuf[i] = 0; |
radiojunkbox | 0:25a282f1141a | 174 | gPitchBendBuf[i] = 0x40; |
radiojunkbox | 0:25a282f1141a | 175 | gModWheelBuf[i] = 0; |
radiojunkbox | 0:25a282f1141a | 176 | } |
radiojunkbox | 0:25a282f1141a | 177 | |
radiojunkbox | 0:25a282f1141a | 178 | gSW = 1; // for Intialize |
radiojunkbox | 0:25a282f1141a | 179 | |
radiojunkbox | 0:25a282f1141a | 180 | CalcHzVTbl(); |
radiojunkbox | 0:25a282f1141a | 181 | InitKamui(); |
radiojunkbox | 0:25a282f1141a | 182 | |
radiojunkbox | 0:25a282f1141a | 183 | // loop |
radiojunkbox | 0:25a282f1141a | 184 | while(1) { |
radiojunkbox | 0:25a282f1141a | 185 | |
radiojunkbox | 0:25a282f1141a | 186 | // ring buffer empty? |
radiojunkbox | 0:25a282f1141a | 187 | if(gPtr_buf_in != gPtr_buf_out) { |
radiojunkbox | 0:25a282f1141a | 188 | |
radiojunkbox | 0:25a282f1141a | 189 | // get 1byte from ring buffer |
radiojunkbox | 0:25a282f1141a | 190 | gPtr_buf_out++; |
radiojunkbox | 0:25a282f1141a | 191 | gPtr_buf_out &= (BUFSIZE - 1); |
radiojunkbox | 0:25a282f1141a | 192 | rb = gRxBuf[gPtr_buf_out]; |
radiojunkbox | 0:25a282f1141a | 193 | MIDI_Parser(rb); |
radiojunkbox | 0:25a282f1141a | 194 | continue; |
radiojunkbox | 0:25a282f1141a | 195 | } |
radiojunkbox | 0:25a282f1141a | 196 | |
radiojunkbox | 0:25a282f1141a | 197 | // Read pot |
radiojunkbox | 0:25a282f1141a | 198 | pot[0] = gAIN1.read_u16(); |
radiojunkbox | 0:25a282f1141a | 199 | pot[1] = gAIN2.read_u16(); |
radiojunkbox | 0:25a282f1141a | 200 | pot[2] = gAIN3.read_u16(); |
radiojunkbox | 0:25a282f1141a | 201 | pot[3] = gAIN4.read_u16(); |
radiojunkbox | 0:25a282f1141a | 202 | |
radiojunkbox | 0:25a282f1141a | 203 | // change pot amount? |
radiojunkbox | 0:25a282f1141a | 204 | if(abs(pot[ch] - _pot[ch]) > 0x2000) edit[ch] = 1; |
radiojunkbox | 0:25a282f1141a | 205 | |
radiojunkbox | 0:25a282f1141a | 206 | if(edit[ch]) { |
radiojunkbox | 0:25a282f1141a | 207 | switch(mode) { |
radiojunkbox | 0:25a282f1141a | 208 | case 0: |
radiojunkbox | 0:25a282f1141a | 209 | gGLIDE[ch] = 1.0 / expf(pot[ch]/PARAM_GLIDE); |
radiojunkbox | 0:25a282f1141a | 210 | val[0][ch] = pot[ch] / 656; |
radiojunkbox | 0:25a282f1141a | 211 | break; |
radiojunkbox | 0:25a282f1141a | 212 | case 1: |
radiojunkbox | 0:25a282f1141a | 213 | gLFO_DP[ch] = expf(pot[ch]/PARAM_DP); |
radiojunkbox | 0:25a282f1141a | 214 | val[1][ch] = pot[ch] / 656; |
radiojunkbox | 0:25a282f1141a | 215 | break; |
radiojunkbox | 0:25a282f1141a | 216 | case 2: |
radiojunkbox | 0:25a282f1141a | 217 | gLFO_FORM[ch] = pot[ch] / 0x4000; |
radiojunkbox | 0:25a282f1141a | 218 | break; |
radiojunkbox | 0:25a282f1141a | 219 | case 3: |
radiojunkbox | 0:25a282f1141a | 220 | gMIDI_CH[ch] = pot[ch] / 0x1000; |
radiojunkbox | 0:25a282f1141a | 221 | break; |
radiojunkbox | 0:25a282f1141a | 222 | default: |
radiojunkbox | 0:25a282f1141a | 223 | break; |
radiojunkbox | 0:25a282f1141a | 224 | } |
radiojunkbox | 0:25a282f1141a | 225 | } |
radiojunkbox | 0:25a282f1141a | 226 | |
radiojunkbox | 0:25a282f1141a | 227 | // Push Mode SW |
radiojunkbox | 0:25a282f1141a | 228 | if(gSW & SW1) { |
radiojunkbox | 0:25a282f1141a | 229 | mode++; |
radiojunkbox | 0:25a282f1141a | 230 | mode &= 0x03; |
radiojunkbox | 0:25a282f1141a | 231 | for( i=0; i<4; i++) { |
radiojunkbox | 0:25a282f1141a | 232 | _pot[i] = pot[i]; |
radiojunkbox | 0:25a282f1141a | 233 | edit[i] = 0; |
radiojunkbox | 0:25a282f1141a | 234 | } |
radiojunkbox | 0:25a282f1141a | 235 | } |
radiojunkbox | 0:25a282f1141a | 236 | gSW = 0; |
radiojunkbox | 0:25a282f1141a | 237 | |
radiojunkbox | 0:25a282f1141a | 238 | // LCD Display |
radiojunkbox | 0:25a282f1141a | 239 | gLCD.locate( 0, 1 ); |
radiojunkbox | 0:25a282f1141a | 240 | switch(mode) { |
radiojunkbox | 0:25a282f1141a | 241 | case 0: |
radiojunkbox | 0:25a282f1141a | 242 | gLCD.printf("GLID %02d %02d %02d %02d", |
radiojunkbox | 0:25a282f1141a | 243 | val[0][0], val[0][1], val[0][2], val[0][3]); |
radiojunkbox | 0:25a282f1141a | 244 | break; |
radiojunkbox | 0:25a282f1141a | 245 | case 1: |
radiojunkbox | 0:25a282f1141a | 246 | gLCD.printf("FREQ %02d %02d %02d %02d", |
radiojunkbox | 0:25a282f1141a | 247 | val[1][0], val[1][1], val[1][2], val[1][3]); |
radiojunkbox | 0:25a282f1141a | 248 | break; |
radiojunkbox | 0:25a282f1141a | 249 | case 2: |
radiojunkbox | 0:25a282f1141a | 250 | gLCD.printf("FORM %s %s %s %s", |
radiojunkbox | 0:25a282f1141a | 251 | wave[gLFO_FORM[0]], wave[gLFO_FORM[1]], |
radiojunkbox | 0:25a282f1141a | 252 | wave[gLFO_FORM[2]], wave[gLFO_FORM[3]]); |
radiojunkbox | 0:25a282f1141a | 253 | break; |
radiojunkbox | 0:25a282f1141a | 254 | case 3: |
radiojunkbox | 0:25a282f1141a | 255 | gLCD.printf("MIDI %02d %02d %02d %02d", |
radiojunkbox | 0:25a282f1141a | 256 | gMIDI_CH[0]+1, gMIDI_CH[1]+1, |
radiojunkbox | 0:25a282f1141a | 257 | gMIDI_CH[2]+1, gMIDI_CH[3]+1); |
radiojunkbox | 0:25a282f1141a | 258 | break; |
radiojunkbox | 0:25a282f1141a | 259 | } |
radiojunkbox | 0:25a282f1141a | 260 | |
radiojunkbox | 0:25a282f1141a | 261 | ch++; |
radiojunkbox | 0:25a282f1141a | 262 | ch &= 0x03; |
radiojunkbox | 0:25a282f1141a | 263 | } |
radiojunkbox | 0:25a282f1141a | 264 | } |
radiojunkbox | 0:25a282f1141a | 265 | |
radiojunkbox | 0:25a282f1141a | 266 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 267 | // Initialize KAMUI |
radiojunkbox | 0:25a282f1141a | 268 | |
radiojunkbox | 0:25a282f1141a | 269 | void InitKamui() |
radiojunkbox | 0:25a282f1141a | 270 | { |
radiojunkbox | 0:25a282f1141a | 271 | // Init. Variables |
radiojunkbox | 0:25a282f1141a | 272 | for( int i=0; i<8; i++) { |
radiojunkbox | 0:25a282f1141a | 273 | gCV[i] = 0x8000; |
radiojunkbox | 0:25a282f1141a | 274 | } |
radiojunkbox | 0:25a282f1141a | 275 | gGATE = 0; |
radiojunkbox | 0:25a282f1141a | 276 | gSYNC = 0; |
radiojunkbox | 0:25a282f1141a | 277 | |
radiojunkbox | 0:25a282f1141a | 278 | gUpdateMode = UPDATE_MODE0; |
radiojunkbox | 0:25a282f1141a | 279 | |
radiojunkbox | 0:25a282f1141a | 280 | // Init. SPI |
radiojunkbox | 0:25a282f1141a | 281 | gCSA = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 282 | gCSB = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 283 | gSPI.format(8,0); |
radiojunkbox | 0:25a282f1141a | 284 | gSPI.frequency(SPI_RATE); |
radiojunkbox | 0:25a282f1141a | 285 | |
radiojunkbox | 0:25a282f1141a | 286 | // Init. Serial MIDI |
radiojunkbox | 0:25a282f1141a | 287 | gMIDI.baud(MIDI_RATE); |
radiojunkbox | 0:25a282f1141a | 288 | |
radiojunkbox | 0:25a282f1141a | 289 | // Ticker |
radiojunkbox | 0:25a282f1141a | 290 | gTICKER.attach_us(&UpdateCV, UPDATE_INTERVAL); |
radiojunkbox | 0:25a282f1141a | 291 | |
radiojunkbox | 0:25a282f1141a | 292 | // Beep |
radiojunkbox | 0:25a282f1141a | 293 | gBEEP.period(1.0/BEEP_FREQ); |
radiojunkbox | 0:25a282f1141a | 294 | gBEEP.write(0.5); |
radiojunkbox | 0:25a282f1141a | 295 | wait(0.2); |
radiojunkbox | 0:25a282f1141a | 296 | gBEEP.write(0.0); |
radiojunkbox | 0:25a282f1141a | 297 | |
radiojunkbox | 0:25a282f1141a | 298 | // Init Display |
radiojunkbox | 0:25a282f1141a | 299 | gLCD.locate( 0, 0 ); |
radiojunkbox | 0:25a282f1141a | 300 | // 123456789ABCDEF |
radiojunkbox | 0:25a282f1141a | 301 | gLCD.printf("MIDI-CV Example"); |
radiojunkbox | 0:25a282f1141a | 302 | } |
radiojunkbox | 0:25a282f1141a | 303 | |
radiojunkbox | 0:25a282f1141a | 304 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 305 | // Update CV, GATE, SYNC |
radiojunkbox | 0:25a282f1141a | 306 | |
radiojunkbox | 0:25a282f1141a | 307 | void UpdateCV() |
radiojunkbox | 0:25a282f1141a | 308 | { |
radiojunkbox | 0:25a282f1141a | 309 | unsigned char rcv,ch; |
radiojunkbox | 0:25a282f1141a | 310 | unsigned char ptn[] = { 0,1,6,7,2,3,6,7,4,5,6,7 }; |
radiojunkbox | 0:25a282f1141a | 311 | const int numptn = (sizeof ptn / sizeof ptn[0]) - 1; |
radiojunkbox | 0:25a282f1141a | 312 | static unsigned char cnt; |
radiojunkbox | 0:25a282f1141a | 313 | |
radiojunkbox | 0:25a282f1141a | 314 | // SET DAC |
radiojunkbox | 0:25a282f1141a | 315 | ch = ptn[cnt]; |
radiojunkbox | 0:25a282f1141a | 316 | if(gUpdateMode) ch |= 0x06; |
radiojunkbox | 0:25a282f1141a | 317 | |
radiojunkbox | 0:25a282f1141a | 318 | #ifdef AD5551 // 14bitDAC |
radiojunkbox | 0:25a282f1141a | 319 | gDAC.WORD = gCV[ch] >> 2; |
radiojunkbox | 0:25a282f1141a | 320 | #else |
radiojunkbox | 0:25a282f1141a | 321 | gDAC.WORD = gCV[ch]; |
radiojunkbox | 0:25a282f1141a | 322 | #endif |
radiojunkbox | 0:25a282f1141a | 323 | |
radiojunkbox | 0:25a282f1141a | 324 | gCSA = _ENABLE; |
radiojunkbox | 0:25a282f1141a | 325 | gSPI.write(gDAC.BYTE.H); |
radiojunkbox | 0:25a282f1141a | 326 | gSPI.write(gDAC.BYTE.L); |
radiojunkbox | 0:25a282f1141a | 327 | gCSA = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 328 | |
radiojunkbox | 0:25a282f1141a | 329 | // GATE or SYNC OUT |
radiojunkbox | 0:25a282f1141a | 330 | if(cnt & 0x01) { |
radiojunkbox | 0:25a282f1141a | 331 | // GATE OUT |
radiojunkbox | 0:25a282f1141a | 332 | gCSB = _ENABLE; |
radiojunkbox | 0:25a282f1141a | 333 | rcv = gSPI.write(gGATE | MODE_GATE) & 0x0F; |
radiojunkbox | 0:25a282f1141a | 334 | gCSB = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 335 | } |
radiojunkbox | 0:25a282f1141a | 336 | else { |
radiojunkbox | 0:25a282f1141a | 337 | // SYNC OUT |
radiojunkbox | 0:25a282f1141a | 338 | gCSB = _ENABLE; |
radiojunkbox | 0:25a282f1141a | 339 | rcv = gSPI.write(gSYNC | MODE_SYNC); |
radiojunkbox | 0:25a282f1141a | 340 | gCSB = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 341 | } |
radiojunkbox | 0:25a282f1141a | 342 | |
radiojunkbox | 0:25a282f1141a | 343 | // SEL CV CHANNEL |
radiojunkbox | 0:25a282f1141a | 344 | gCSB = _ENABLE; |
radiojunkbox | 0:25a282f1141a | 345 | gSPI.write(ch); |
radiojunkbox | 0:25a282f1141a | 346 | gCSB = _DISABLE; |
radiojunkbox | 0:25a282f1141a | 347 | |
radiojunkbox | 0:25a282f1141a | 348 | cnt < numptn ? cnt++ : cnt = 0; |
radiojunkbox | 0:25a282f1141a | 349 | |
radiojunkbox | 0:25a282f1141a | 350 | gSW |= CheckSW(rcv); |
radiojunkbox | 0:25a282f1141a | 351 | RcvMIDI(); |
radiojunkbox | 0:25a282f1141a | 352 | DinSync(); |
radiojunkbox | 0:25a282f1141a | 353 | MidiCV(); |
radiojunkbox | 0:25a282f1141a | 354 | } |
radiojunkbox | 0:25a282f1141a | 355 | |
radiojunkbox | 0:25a282f1141a | 356 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 357 | // Check SW |
radiojunkbox | 0:25a282f1141a | 358 | |
radiojunkbox | 0:25a282f1141a | 359 | unsigned char CheckSW(unsigned char c) { |
radiojunkbox | 0:25a282f1141a | 360 | |
radiojunkbox | 0:25a282f1141a | 361 | static unsigned char swbuf[2]; |
radiojunkbox | 0:25a282f1141a | 362 | static unsigned int cntsw; |
radiojunkbox | 0:25a282f1141a | 363 | unsigned char ret = 0; |
radiojunkbox | 0:25a282f1141a | 364 | |
radiojunkbox | 0:25a282f1141a | 365 | if(cntsw > SW_WATCH_INTERVAL) { |
radiojunkbox | 0:25a282f1141a | 366 | if(c &= 0x0F) { |
radiojunkbox | 0:25a282f1141a | 367 | if(!swbuf[1]) { |
radiojunkbox | 0:25a282f1141a | 368 | if( swbuf[0] == c) { |
radiojunkbox | 0:25a282f1141a | 369 | swbuf[1] = c; |
radiojunkbox | 0:25a282f1141a | 370 | ret = c; |
radiojunkbox | 0:25a282f1141a | 371 | } |
radiojunkbox | 0:25a282f1141a | 372 | else { |
radiojunkbox | 0:25a282f1141a | 373 | swbuf[0] = c; |
radiojunkbox | 0:25a282f1141a | 374 | } |
radiojunkbox | 0:25a282f1141a | 375 | } |
radiojunkbox | 0:25a282f1141a | 376 | } |
radiojunkbox | 0:25a282f1141a | 377 | else { |
radiojunkbox | 0:25a282f1141a | 378 | swbuf[1] = 0; |
radiojunkbox | 0:25a282f1141a | 379 | swbuf[0] = 0; |
radiojunkbox | 0:25a282f1141a | 380 | } |
radiojunkbox | 0:25a282f1141a | 381 | cntsw = 0; |
radiojunkbox | 0:25a282f1141a | 382 | } |
radiojunkbox | 0:25a282f1141a | 383 | cntsw++; |
radiojunkbox | 0:25a282f1141a | 384 | return ret; |
radiojunkbox | 0:25a282f1141a | 385 | } |
radiojunkbox | 0:25a282f1141a | 386 | |
radiojunkbox | 0:25a282f1141a | 387 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 388 | // Receive MIDI Data & Store Ring Buffer |
radiojunkbox | 0:25a282f1141a | 389 | |
radiojunkbox | 0:25a282f1141a | 390 | void RcvMIDI() { |
radiojunkbox | 0:25a282f1141a | 391 | |
radiojunkbox | 0:25a282f1141a | 392 | if(!gMIDI.readable()) return; |
radiojunkbox | 0:25a282f1141a | 393 | |
radiojunkbox | 0:25a282f1141a | 394 | gPtr_buf_in++; |
radiojunkbox | 0:25a282f1141a | 395 | gPtr_buf_in &= (BUFSIZE - 1); |
radiojunkbox | 0:25a282f1141a | 396 | gRxBuf[gPtr_buf_in] = gMIDI.getc(); |
radiojunkbox | 0:25a282f1141a | 397 | } |
radiojunkbox | 0:25a282f1141a | 398 | |
radiojunkbox | 0:25a282f1141a | 399 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 400 | // MIDI Data to CV, GATE |
radiojunkbox | 0:25a282f1141a | 401 | |
radiojunkbox | 0:25a282f1141a | 402 | void MidiCV() |
radiojunkbox | 0:25a282f1141a | 403 | { |
radiojunkbox | 0:25a282f1141a | 404 | static unsigned char ch; |
radiojunkbox | 0:25a282f1141a | 405 | static unsigned short phase[4]; |
radiojunkbox | 0:25a282f1141a | 406 | static float cvf[4]; |
radiojunkbox | 0:25a282f1141a | 407 | int lfo,mod; |
radiojunkbox | 0:25a282f1141a | 408 | unsigned char midi_ch; |
radiojunkbox | 0:25a282f1141a | 409 | unsigned int cv; |
radiojunkbox | 0:25a282f1141a | 410 | unsigned int note; |
radiojunkbox | 0:25a282f1141a | 411 | |
radiojunkbox | 0:25a282f1141a | 412 | midi_ch = gMIDI_CH[ch]; |
radiojunkbox | 0:25a282f1141a | 413 | |
radiojunkbox | 0:25a282f1141a | 414 | note = gPlayNoteBuf[midi_ch]; |
radiojunkbox | 0:25a282f1141a | 415 | if( note < MINIMUMNOTE) note = MINIMUMNOTE; |
radiojunkbox | 0:25a282f1141a | 416 | note -= MINIMUMNOTE; |
radiojunkbox | 0:25a282f1141a | 417 | |
radiojunkbox | 0:25a282f1141a | 418 | // DDS Phase |
radiojunkbox | 0:25a282f1141a | 419 | phase[ch] += gLFO_DP[ch]; |
radiojunkbox | 0:25a282f1141a | 420 | |
radiojunkbox | 0:25a282f1141a | 421 | // LFO DDS Genelator |
radiojunkbox | 0:25a282f1141a | 422 | switch(gLFO_FORM[ch]) { |
radiojunkbox | 0:25a282f1141a | 423 | case LFO_WF_TRI: |
radiojunkbox | 0:25a282f1141a | 424 | if(phase[ch] < 32738) lfo = phase[ch] - 16384; |
radiojunkbox | 0:25a282f1141a | 425 | else lfo = (16383 + 32768) - phase[ch]; |
radiojunkbox | 0:25a282f1141a | 426 | break; |
radiojunkbox | 0:25a282f1141a | 427 | case LFO_WF_SQR: |
radiojunkbox | 0:25a282f1141a | 428 | if(phase[ch] < 32738) lfo = 32767; |
radiojunkbox | 0:25a282f1141a | 429 | else lfo = 0; |
radiojunkbox | 0:25a282f1141a | 430 | break; |
radiojunkbox | 0:25a282f1141a | 431 | case LFO_WF_SAW: |
radiojunkbox | 0:25a282f1141a | 432 | lfo = phase[ch] / 2 - 16384; |
radiojunkbox | 0:25a282f1141a | 433 | break; |
radiojunkbox | 0:25a282f1141a | 434 | default : |
radiojunkbox | 0:25a282f1141a | 435 | lfo = 0; |
radiojunkbox | 0:25a282f1141a | 436 | break; |
radiojunkbox | 0:25a282f1141a | 437 | } |
radiojunkbox | 0:25a282f1141a | 438 | |
radiojunkbox | 0:25a282f1141a | 439 | // Modulation amount |
radiojunkbox | 0:25a282f1141a | 440 | mod = lfo * gModWheelBuf[midi_ch] >> 7; |
radiojunkbox | 0:25a282f1141a | 441 | |
radiojunkbox | 0:25a282f1141a | 442 | // Calculate CV |
radiojunkbox | 0:25a282f1141a | 443 | cvf[ch] = ((float)(note << 8) - cvf[ch]) * gGLIDE[ch] + cvf[ch]; |
radiojunkbox | 0:25a282f1141a | 444 | cv = (unsigned int)cvf[ch] + (0x8000 - (0x0040 << 3)) |
radiojunkbox | 0:25a282f1141a | 445 | + (gPitchBendBuf[midi_ch] << 2) + mod; |
radiojunkbox | 0:25a282f1141a | 446 | if(cv > 0xFFFF) cv = 0xFFFF; |
radiojunkbox | 0:25a282f1141a | 447 | gCV[ch] = (unsigned short)cv; |
radiojunkbox | 0:25a282f1141a | 448 | gCV[ch+4] = OctVtoHzV(gCV[ch]); |
radiojunkbox | 0:25a282f1141a | 449 | |
radiojunkbox | 0:25a282f1141a | 450 | // GATE |
radiojunkbox | 0:25a282f1141a | 451 | gGateBuf[midi_ch] ? gGATE |= (1<<ch) : gGATE &= ~(1<<ch); |
radiojunkbox | 0:25a282f1141a | 452 | |
radiojunkbox | 0:25a282f1141a | 453 | ch++; |
radiojunkbox | 0:25a282f1141a | 454 | ch &= 0x03; |
radiojunkbox | 0:25a282f1141a | 455 | } |
radiojunkbox | 0:25a282f1141a | 456 | |
radiojunkbox | 0:25a282f1141a | 457 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 458 | // Oct/V to Hz/V Converter |
radiojunkbox | 0:25a282f1141a | 459 | |
radiojunkbox | 0:25a282f1141a | 460 | void CalcHzVTbl() // Calc Conv. Table |
radiojunkbox | 0:25a282f1141a | 461 | { |
radiojunkbox | 0:25a282f1141a | 462 | int i; |
radiojunkbox | 0:25a282f1141a | 463 | float v; |
radiojunkbox | 0:25a282f1141a | 464 | |
radiojunkbox | 0:25a282f1141a | 465 | for( i=0; i<3072; i++) { |
radiojunkbox | 0:25a282f1141a | 466 | v = 24576.0 * pow(2.0,(i/3072.0)); |
radiojunkbox | 0:25a282f1141a | 467 | gTblHzV[i] = (unsigned short)v; |
radiojunkbox | 0:25a282f1141a | 468 | } |
radiojunkbox | 0:25a282f1141a | 469 | } |
radiojunkbox | 0:25a282f1141a | 470 | |
radiojunkbox | 0:25a282f1141a | 471 | unsigned short OctVtoHzV( unsigned short vin) |
radiojunkbox | 0:25a282f1141a | 472 | { |
radiojunkbox | 0:25a282f1141a | 473 | int oct,res; |
radiojunkbox | 0:25a282f1141a | 474 | unsigned short vout; |
radiojunkbox | 0:25a282f1141a | 475 | |
radiojunkbox | 0:25a282f1141a | 476 | if(vin > 0xE400) vin = 0xE400; // Maximum Note E8 Vin = 10.794V |
radiojunkbox | 0:25a282f1141a | 477 | if(vin < 0x6800) vin = 0x6800; // Minimum Note C-2 Vin = -2.000V |
radiojunkbox | 0:25a282f1141a | 478 | vin -= 0x6800; |
radiojunkbox | 0:25a282f1141a | 479 | |
radiojunkbox | 0:25a282f1141a | 480 | oct = vin / 0xC00; // 0xC00 : 3072 |
radiojunkbox | 0:25a282f1141a | 481 | res = vin % 0xC00; |
radiojunkbox | 0:25a282f1141a | 482 | |
radiojunkbox | 0:25a282f1141a | 483 | vout = ((unsigned short)gTblHzV[res] >> (10 - oct)) + 0x8000; |
radiojunkbox | 0:25a282f1141a | 484 | return vout; |
radiojunkbox | 0:25a282f1141a | 485 | } |
radiojunkbox | 0:25a282f1141a | 486 | |
radiojunkbox | 0:25a282f1141a | 487 | //------------------------------------------------------------- |
radiojunkbox | 0:25a282f1141a | 488 | // DIN SYNC Control |
radiojunkbox | 0:25a282f1141a | 489 | |
radiojunkbox | 0:25a282f1141a | 490 | void DinSync() |
radiojunkbox | 0:25a282f1141a | 491 | { |
radiojunkbox | 0:25a282f1141a | 492 | static unsigned int cnt; |
radiojunkbox | 0:25a282f1141a | 493 | static unsigned int cnt24 = 10; |
radiojunkbox | 0:25a282f1141a | 494 | |
radiojunkbox | 0:25a282f1141a | 495 | if(gMIDISYNC_RUN) gSYNC |= (SYNC1RUN | SYNC2RUN); |
radiojunkbox | 0:25a282f1141a | 496 | else gSYNC &= ~(SYNC1RUN | SYNC2RUN); |
radiojunkbox | 0:25a282f1141a | 497 | |
radiojunkbox | 0:25a282f1141a | 498 | if(cnt >= SYNC_TURN_TIME) gSYNC &= ~(SYNC1CLK | SYNC2CLK); |
radiojunkbox | 0:25a282f1141a | 499 | |
radiojunkbox | 0:25a282f1141a | 500 | if(gMIDISYNC_CLK) { |
radiojunkbox | 0:25a282f1141a | 501 | gSYNC |= (SYNC1CLK | SYNC2CLK); |
radiojunkbox | 0:25a282f1141a | 502 | gMIDISYNC_CLK = 0; |
radiojunkbox | 0:25a282f1141a | 503 | cnt = 0; |
radiojunkbox | 0:25a282f1141a | 504 | cnt24++; |
radiojunkbox | 0:25a282f1141a | 505 | } |
radiojunkbox | 0:25a282f1141a | 506 | if(cnt24 >= 24) cnt24 = 0; |
radiojunkbox | 0:25a282f1141a | 507 | |
radiojunkbox | 0:25a282f1141a | 508 | gLED3 = gSYNC & SYNC1RUN ? 1 : 0; |
radiojunkbox | 0:25a282f1141a | 509 | gLED4 = cnt24 < 4 ? 1 : 0; |
radiojunkbox | 0:25a282f1141a | 510 | |
radiojunkbox | 0:25a282f1141a | 511 | cnt++; |
radiojunkbox | 0:25a282f1141a | 512 | } |