David Bottrill / Mbed 2 deprecated MIDI_Pipe_Organ

USBMIDI sampled pipe organ uses real pipe organ samples to produce a realistic sound with 16 note polyphony. A serial output will drive external TPIC6A596 shift registers that could be used to drive pipe organ magnets (Solenoid valves)

Dependencies:   TextLCD USBDevice mbed

main.cpp@8:df5f305aab22, 2015-11-07 (annotated)

Committer:
djbottrill
Date:
Sat Nov 07 12:18:44 2015 +0000
Revision:
8:df5f305aab22
Parent:
7:e1ea1623c6c2
Child:
9:b0f110c02b1b
added new Bourdon sample at 32KHz sample frequency ; added utilisation bar graph display

Who changed what in which revision?

UserRevisionLine numberNew contents of line
djbottrill 0:4d06e0867376 1 /*
djbottrill 0:4d06e0867376 2 Program to drive organ magnets from a MIDI input
djbottrill 0:4d06e0867376 3 From Midi note 36 the notes are send to a 96 bit shift register organ magnet driver board based on 12 x TPIC6B595 shift registers
djbottrill 0:4d06e0867376 4 The program uses the DAC to generate 16 sampled audio channel outputs at 22.05Khz that mirror the solenoid outputs, but also run from
djbottrill 0:4d06e0867376 5 MIDI note 24 so the bottom 16' octave can be generated electronically if 16' pipes are not feasible.
djbottrill 0:4d06e0867376 6 In fact the sampled output could be tailored to fill in any missing note ranges,
djbottrill 0:4d06e0867376 7 Repeated pressing sw3 cycles through a number of display modes.
djbottrill 0:4d06e0867376 8 */
djbottrill 0:4d06e0867376 9 #include "mbed.h"
djbottrill 0:4d06e0867376 10
djbottrill 5:13a1e5e4494d 11 //#include "Rohrflute.h"
djbottrill 2:8b22402c0b0f 12 //#include "Dubbelflojt.h"
djbottrill 2:8b22402c0b0f 13 //#include "Principal.h"
djbottrill 8:df5f305aab22 14 //#include "Bourdon.h" //This is the best sample
djbottrill 8:df5f305aab22 15 #include "Bourdon_32.h"
djbottrill 0:4d06e0867376 16
djbottrill 0:4d06e0867376 17 #include "USBMIDI.h"
djbottrill 0:4d06e0867376 18
djbottrill 0:4d06e0867376 19 #include "TextLCD.h"
djbottrill 0:4d06e0867376 20 //For Linksprite LCD Shield
djbottrill 0:4d06e0867376 21 //TextLCD lcd(PTC12, D9, D4, D5, D6, D7); // rs, e, d4-d7
djbottrill 0:4d06e0867376 22 //DigitalOut bl(D10);
djbottrill 0:4d06e0867376 23 //D8 is wrong on K64F definition it is actually PTC12 not PTA0
djbottrill 0:4d06e0867376 24
djbottrill 0:4d06e0867376 25 //For Midas 2x16 OLED Display
djbottrill 0:4d06e0867376 26 TextLCD lcd (D2, D3, D4, D5,D6, D7, TextLCD::LCD16x2, NC, NC, TextLCD::WS0010 ); // 4bit bus: RS, E, D4-D7, LCDType=LCD16x2, BL=NC, E2=NC, LCDTCtrl=WS0010
djbottrill 0:4d06e0867376 27
djbottrill 0:4d06e0867376 28 //Serial pc(USBTX, USBRX); // tx, rx
djbottrill 0:4d06e0867376 29
djbottrill 0:4d06e0867376 30 AnalogOut Aout(DAC0_OUT);
djbottrill 0:4d06e0867376 31
djbottrill 0:4d06e0867376 32 DigitalOut redled(LED1);
djbottrill 0:4d06e0867376 33 DigitalOut greenled(LED2);
djbottrill 0:4d06e0867376 34 DigitalOut blueled(LED3);
djbottrill 0:4d06e0867376 35
djbottrill 0:4d06e0867376 36 DigitalOut diag(D15);
djbottrill 0:4d06e0867376 37 DigitalOut diag2(D14);
djbottrill 0:4d06e0867376 38
djbottrill 0:4d06e0867376 39 DigitalIn sw1(PTC6);
djbottrill 0:4d06e0867376 40 DigitalIn sw3(PTA4);
djbottrill 0:4d06e0867376 41
djbottrill 0:4d06e0867376 42 //Wi-Fi connector J6 note pin 3 is incorrectly idenifed in the documentation as PTC12
djbottrill 0:4d06e0867376 43 DigitalOut SRCK(PTD7); //Shift Register clock
djbottrill 0:4d06e0867376 44 DigitalOut RCK(PTD5); //Shift Register latch
djbottrill 0:4d06e0867376 45 DigitalOut SER1(PTB20); //Shift Register serial data outout
djbottrill 0:4d06e0867376 46
djbottrill 0:4d06e0867376 47
djbottrill 0:4d06e0867376 48 Ticker output_ticker; //22.05Khz Ticker for sound generation
djbottrill 0:4d06e0867376 49
djbottrill 0:4d06e0867376 50 int keybuf[128]= {};
djbottrill 0:4d06e0867376 51 int oldkeybuf[128]= {};
djbottrill 0:4d06e0867376 52 int keystat[128]= {};
djbottrill 0:4d06e0867376 53 int keyidx=0; //Key index //Polyphony counter
djbottrill 0:4d06e0867376 54 int outidx=96; //Serial output index
djbottrill 0:4d06e0867376 55
djbottrill 0:4d06e0867376 56 int key=0;
djbottrill 0:4d06e0867376 57 int velocity=0;
djbottrill 0:4d06e0867376 58 int chan=0;
djbottrill 0:4d06e0867376 59 int onoff=0;
djbottrill 0:4d06e0867376 60
djbottrill 0:4d06e0867376 61 unsigned int audio_out; //Audio output value accumulator
djbottrill 0:4d06e0867376 62
djbottrill 0:4d06e0867376 63 //OLELD display bar graph characters
djbottrill 0:4d06e0867376 64 const char udc0[] = {0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15, 0x00};
djbottrill 0:4d06e0867376 65 const char udc1[] = {0x15, 0x10, 0x10, 0x10, 0x10, 0x10, 0x15, 0x00};
djbottrill 0:4d06e0867376 66 const char udc2[] = {0x15, 0x04, 0x04, 0x04, 0x04, 0x04, 0x15, 0x00};
djbottrill 0:4d06e0867376 67 const char udc3[] = {0x15, 0x14, 0x14, 0x14, 0x14, 0x14, 0x15, 0x00};
djbottrill 0:4d06e0867376 68 const char udc4[] = {0x15, 0x01, 0x01, 0x01, 0x01, 0x01, 0x15, 0x00};
djbottrill 0:4d06e0867376 69 const char udc5[] = {0x15, 0x11, 0x11, 0x11, 0x11, 0x11, 0x15, 0x00};
djbottrill 0:4d06e0867376 70 const char udc6[] = {0x15, 0x05, 0x05, 0x05, 0x05, 0x05, 0x15, 0x00};
djbottrill 0:4d06e0867376 71 const char udc7[] = {0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x00};
djbottrill 0:4d06e0867376 72
djbottrill 0:4d06e0867376 73 //Variables for LCD/OLED display
djbottrill 0:4d06e0867376 74 unsigned long int lcd_stat=0;
djbottrill 0:4d06e0867376 75 unsigned long int lcd_stat_old=1;
djbottrill 0:4d06e0867376 76 char display[2][16]; //Display Buffer
djbottrill 0:4d06e0867376 77 char display_old[2][16]; //Old Display Buffer
djbottrill 0:4d06e0867376 78 int pos=0; //Display Position counter
djbottrill 0:4d06e0867376 79 int row=0;
djbottrill 0:4d06e0867376 80 int tval=0;
djbottrill 0:4d06e0867376 81 int keyidx_t=0;
djbottrill 0:4d06e0867376 82 int lcdmode=0; //LCD Display Mode
djbottrill 8:df5f305aab22 83 int x =0;
djbottrill 8:df5f305aab22 84 int x1=1;
djbottrill 8:df5f305aab22 85
djbottrill 0:4d06e0867376 86 int sw1_count=0; //Switch de-bounce counter
djbottrill 0:4d06e0867376 87 int sw1_old=0;
djbottrill 0:4d06e0867376 88 int sw1_phase=0;
djbottrill 0:4d06e0867376 89 int sw3_count=0; //Switch de-bounce counter
djbottrill 0:4d06e0867376 90 int sw3_old=0;
djbottrill 0:4d06e0867376 91 int sw3_phase=0;
djbottrill 0:4d06e0867376 92
djbottrill 0:4d06e0867376 93 //Sound generator variables
djbottrill 0:4d06e0867376 94 int tempidx=0;
djbottrill 0:4d06e0867376 95 int freqidx=45;
djbottrill 0:4d06e0867376 96 float synth[16];
djbottrill 0:4d06e0867376 97 float synthidx[16];
djbottrill 0:4d06e0867376 98 int synth_old[16];
djbottrill 0:4d06e0867376 99 int synthtab[16]= {};
djbottrill 0:4d06e0867376 100 int synthstat[16]= {};
djbottrill 4:9f63e68b548e 101 unsigned char synthoctave[16]= {};
djbottrill 4:9f63e68b548e 102 unsigned char synthnote[16]= {};
djbottrill 0:4d06e0867376 103 int noteidx=0;
djbottrill 0:4d06e0867376 104 int i;
djbottrill 0:4d06e0867376 105 int ii;
djbottrill 0:4d06e0867376 106
djbottrill 0:4d06e0867376 107
djbottrill 0:4d06e0867376 108 /*
djbottrill 0:4d06e0867376 109 Ticker routine to calculate and output the audio signal.
djbottrill 0:4d06e0867376 110 As the DAC is 12 bit this allows for 16 concurrennt 8 bit samples running with no additional loss of precision.
djbottrill 0:4d06e0867376 111 The samples should be normalised to maximise the 8 bit range as only one sample is used there is no need to generate sounds with different amplitude.
djbottrill 5:13a1e5e4494d 112 Sound Generation is in 4 states stored in synthstat:
djbottrill 0:4d06e0867376 113 0 = Synth Channel idle
djbottrill 0:4d06e0867376 114 1 = Attack / Sustain phase note running and looping if necessary
djbottrill 5:13a1e5e4494d 115 2 = Signal to start decay this may be delayed until the sound is paat the initial attack point typically 100-200 mS
djbottrill 0:4d06e0867376 116 3 = Sample is in the decay phase.
djbottrill 0:4d06e0867376 117
djbottrill 5:13a1e5e4494d 118 This routine also handles the Synchronous output to a 96 bit shift register Organ Pallet magnet driver board, one bit is sent per tick.
djbottrill 0:4d06e0867376 119 The data clock pulse is generated during the 16 channel synth scan and the final latch pulse is generated on the 96th Tick.
djbottrill 0:4d06e0867376 120 All 96 bits are clocked out in around 4.4mS.
djbottrill 0:4d06e0867376 121 */
djbottrill 0:4d06e0867376 122 void aout()
djbottrill 0:4d06e0867376 123 {
djbottrill 4:9f63e68b548e 124 diag=1; //Pulse DIAG Pin for Scoping purposes IE pin high
djbottrill 0:4d06e0867376 125 redled=0; //Pulse Red LED to indicate Ticker working
djbottrill 0:4d06e0867376 126 audio_out=0; //Clear Audio Accumulator
djbottrill 0:4d06e0867376 127
djbottrill 0:4d06e0867376 128 SER1=keybuf[outidx+12]; //Send bit serially
djbottrill 0:4d06e0867376 129
djbottrill 0:4d06e0867376 130 for (i =0; i<16; i++) { //Do 16 channels
djbottrill 4:9f63e68b548e 131 switch (synthstat[i]) {
djbottrill 4:9f63e68b548e 132 case 1: //Sustain phase
djbottrill 4:9f63e68b548e 133 if (synth[i]>sample_loop_end[synthoctave[i]]) { //Got to end of buffer?
djbottrill 4:9f63e68b548e 134 synth[i]=sample_loop_start[synthoctave[i]]; //Wrap around back to start
djbottrill 4:9f63e68b548e 135 }
djbottrill 4:9f63e68b548e 136 break;
djbottrill 5:13a1e5e4494d 137 case 2: //Note off demand state
djbottrill 0:4d06e0867376 138 if (synth[i]>=sample_attack[synthoctave[i]]) { //Delay decay phase if not past end of attack
djbottrill 0:4d06e0867376 139 //Check if the waveform is close to zero crossing this helps eliminate clicks looks for rising edge approaching 0x80
djbottrill 0:4d06e0867376 140 tempidx=synth[i];
djbottrill 5:13a1e5e4494d 141 if (sample[synthoctave[i]][tempidx]<128 & sample[synthoctave[i]][tempidx]>120) {
djbottrill 0:4d06e0867376 142 if (sample[synthoctave[i]][tempidx]>synth_old[i]) {
djbottrill 7:e1ea1623c6c2 143 synth[i]=sample_loop_off[synthoctave[i]]; //Jump to start of decay
djbottrill 7:e1ea1623c6c2 144 synthstat[i]=3; //Say note in decay
djbottrill 0:4d06e0867376 145 }
djbottrill 0:4d06e0867376 146 }
djbottrill 0:4d06e0867376 147 }
djbottrill 4:9f63e68b548e 148 break;
djbottrill 7:e1ea1623c6c2 149 case 3: //Check if decay has completed
djbottrill 8:df5f305aab22 150 if (synth[i]>=sample_len[synthoctave[i]]) { //End of decay?
djbottrill 8:df5f305aab22 151 synthstat[i]=0; //say channel free
djbottrill 8:df5f305aab22 152 synth[i]=0; //Set sample pointer to 0
djbottrill 8:df5f305aab22 153 synthidx[i]=0; //Set sample index to 0
djbottrill 8:df5f305aab22 154 synthtab[i]=255; //Set to invalid
djbottrill 7:e1ea1623c6c2 155 }
djbottrill 7:e1ea1623c6c2 156 break ;
djbottrill 0:4d06e0867376 157 }
djbottrill 4:9f63e68b548e 158
djbottrill 4:9f63e68b548e 159 //get sample and add to Audio Accumulator
djbottrill 8:df5f305aab22 160 synth_old[i]=sample[synthoctave[i]][(int)(synth[i])]; //Get and save old sample
djbottrill 0:4d06e0867376 161 audio_out=audio_out+synth_old[i]; //add sample to audio out accumulator
djbottrill 0:4d06e0867376 162 synth[i]=synth[i]+synthidx[i]; //Get next sample pointer
djbottrill 0:4d06e0867376 163
djbottrill 0:4d06e0867376 164
djbottrill 0:4d06e0867376 165 //Generate clock pulses to send data serially
djbottrill 4:9f63e68b548e 166 switch (i) {
djbottrill 4:9f63e68b548e 167 case 2:
djbottrill 4:9f63e68b548e 168 SRCK=1; //Generate serial output clock pulse
djbottrill 4:9f63e68b548e 169 break;
djbottrill 4:9f63e68b548e 170 case 5:
djbottrill 4:9f63e68b548e 171 SRCK=0;
djbottrill 4:9f63e68b548e 172 break;
djbottrill 4:9f63e68b548e 173 case 10:
djbottrill 4:9f63e68b548e 174 if (outidx==0) {
djbottrill 4:9f63e68b548e 175 RCK=1; //Generate latch strobe after 96 bits sent
djbottrill 4:9f63e68b548e 176 }
djbottrill 4:9f63e68b548e 177 break;
djbottrill 4:9f63e68b548e 178 case 15:
djbottrill 4:9f63e68b548e 179 if (outidx==0) {
djbottrill 4:9f63e68b548e 180 RCK=0; //Generate latch strobe after 96 bits sent
djbottrill 4:9f63e68b548e 181 outidx=96;
djbottrill 4:9f63e68b548e 182 }
djbottrill 4:9f63e68b548e 183 break;
djbottrill 0:4d06e0867376 184 }
djbottrill 4:9f63e68b548e 185
djbottrill 0:4d06e0867376 186 } //Next Note
djbottrill 0:4d06e0867376 187 outidx--; //Next serial data bit
djbottrill 0:4d06e0867376 188
djbottrill 8:df5f305aab22 189
djbottrill 0:4d06e0867376 190 //Output to DAC
djbottrill 0:4d06e0867376 191 Aout.write_u16(audio_out*16);
djbottrill 7:e1ea1623c6c2 192
djbottrill 0:4d06e0867376 193 redled=1;
djbottrill 0:4d06e0867376 194 diag=0;
djbottrill 0:4d06e0867376 195 }
djbottrill 0:4d06e0867376 196
djbottrill 0:4d06e0867376 197 /*
djbottrill 0:4d06e0867376 198 Interrupt routine to receive MIDI on/off message and set LED status accordingly
djbottrill 0:4d06e0867376 199 MIDI note on/off events directly start/stop the synth channels and store the note status in keytab.
djbottrill 0:4d06e0867376 200 */
djbottrill 0:4d06e0867376 201 void get_message(MIDIMessage msg)
djbottrill 0:4d06e0867376 202 {
djbottrill 0:4d06e0867376 203 greenled=0; //Pulse Green LED to indicate MIDI activity
djbottrill 0:4d06e0867376 204 key=msg.key();
djbottrill 0:4d06e0867376 205 velocity=msg.velocity();
djbottrill 0:4d06e0867376 206 chan=msg.channel();
djbottrill 0:4d06e0867376 207 switch (msg.type()) {
djbottrill 0:4d06e0867376 208 case MIDIMessage::NoteOnType: //MIDI note on received
djbottrill 8:df5f305aab22 209 if (key>23 & key<120) {
djbottrill 0:4d06e0867376 210 onoff=1;
djbottrill 0:4d06e0867376 211 keybuf[(key-24)]=1; //Store in keybuf, except for notes 24-35
djbottrill 0:4d06e0867376 212 //Process keys on
djbottrill 0:4d06e0867376 213 //Find a free note generator and start the note playing, if no slots available just ignore the note
djbottrill 0:4d06e0867376 214 for (ii=0; ii<16; ii++) {
djbottrill 5:13a1e5e4494d 215 if (synthtab[ii]==(key-24) & synthstat[ii]>0) { //Is synth already playing the note?
djbottrill 6:073e10217962 216 synth[ii]=0; //Set sample pointer to 0
djbottrill 5:13a1e5e4494d 217 synthstat[ii]=1; //Restart the note
djbottrill 5:13a1e5e4494d 218 break; //exit loop
djbottrill 5:13a1e5e4494d 219 }
djbottrill 5:13a1e5e4494d 220 if (synthstat[ii]==0) { //Is synth channel free?
djbottrill 0:4d06e0867376 221 synthtab[ii]=key-24; //Store note value
djbottrill 0:4d06e0867376 222 synthoctave[ii]=synthtab[ii]/12; //Store the octave
djbottrill 4:9f63e68b548e 223 synthnote[ii]= synthtab[ii]%12; //Note within the octave
djbottrill 0:4d06e0867376 224 synthstat[ii]=1; //Set status to playing
djbottrill 0:4d06e0867376 225 synthidx[ii]=freqtab[synthnote[ii]]; //Set the frequency
djbottrill 5:13a1e5e4494d 226 break; //exit loop
djbottrill 0:4d06e0867376 227 } //Next Synth slot
djbottrill 0:4d06e0867376 228 }
djbottrill 0:4d06e0867376 229 }
djbottrill 6:073e10217962 230
djbottrill 0:4d06e0867376 231 break;
djbottrill 0:4d06e0867376 232
djbottrill 0:4d06e0867376 233 //Process keys off
djbottrill 0:4d06e0867376 234 case MIDIMessage::NoteOffType: //Midi note off received
djbottrill 0:4d06e0867376 235 if (key>23) {
djbottrill 0:4d06e0867376 236 onoff=0;
djbottrill 0:4d06e0867376 237 keybuf[(key-24)]=0; //Update keybuf
djbottrill 0:4d06e0867376 238 for (ii=0; ii<16; ii++) {
djbottrill 5:13a1e5e4494d 239 if (synthstat[ii]==1 & synthtab[ii]==(key-24)) { //Note currently playing
djbottrill 0:4d06e0867376 240 synthstat[ii]=2; //Set Start decay
djbottrill 5:13a1e5e4494d 241 break; //Exit loop
djbottrill 0:4d06e0867376 242 }
djbottrill 0:4d06e0867376 243 }
djbottrill 0:4d06e0867376 244 }
djbottrill 0:4d06e0867376 245 break;
djbottrill 0:4d06e0867376 246
djbottrill 0:4d06e0867376 247 //Process all notes off command
djbottrill 0:4d06e0867376 248 case MIDIMessage::AllNotesOffType: //Midi all notes off
djbottrill 0:4d06e0867376 249 for (ii=0; ii<108; i++) {
djbottrill 0:4d06e0867376 250 keybuf[ii]=0; //Clear Keybuf
djbottrill 0:4d06e0867376 251 }
djbottrill 0:4d06e0867376 252 for (ii=0; ii>16; ii++) { //Kill any sampled notes playing
djbottrill 0:4d06e0867376 253 synthstat[ii]=0; //say channel free
djbottrill 0:4d06e0867376 254 synth[ii]=0; //Set sample pointer to 0
djbottrill 0:4d06e0867376 255 synthidx[ii]=0; //Set sample index to 0
djbottrill 0:4d06e0867376 256 synthtab[ii]=255; //Set to invalid
djbottrill 0:4d06e0867376 257 }
djbottrill 0:4d06e0867376 258 break;
djbottrill 4:9f63e68b548e 259
djbottrill 0:4d06e0867376 260 //Any other MIDI Commands just ignore
djbottrill 0:4d06e0867376 261 default:
djbottrill 0:4d06e0867376 262 break;
djbottrill 0:4d06e0867376 263 }
djbottrill 0:4d06e0867376 264 greenled=1;
djbottrill 0:4d06e0867376 265 }
djbottrill 0:4d06e0867376 266
djbottrill 0:4d06e0867376 267
djbottrill 0:4d06e0867376 268 int main()
djbottrill 0:4d06e0867376 269 {
djbottrill 0:4d06e0867376 270 greenled=1;
djbottrill 0:4d06e0867376 271 redled=1;
djbottrill 0:4d06e0867376 272 blueled=1;
djbottrill 0:4d06e0867376 273 SRCK=0; //Serial Clock low
djbottrill 0:4d06e0867376 274 RCK=0; //Latch Clock low
djbottrill 0:4d06e0867376 275
djbottrill 0:4d06e0867376 276 sw1.mode(PullUp);
djbottrill 0:4d06e0867376 277 sw3.mode(PullUp);
djbottrill 0:4d06e0867376 278
djbottrill 0:4d06e0867376 279 output_ticker.attach(&aout, sample_rate); //Set Sample frequency
djbottrill 0:4d06e0867376 280
djbottrill 0:4d06e0867376 281 lcd.cls();
djbottrill 0:4d06e0867376 282 wait(0.1);
djbottrill 0:4d06e0867376 283 lcd.setCursor(TextLCD::CurOff_BlkOff);
djbottrill 0:4d06e0867376 284 lcd.cls();
djbottrill 0:4d06e0867376 285 lcd.printf("MIDI Pipe Organ Waiting for USB");
djbottrill 0:4d06e0867376 286
djbottrill 0:4d06e0867376 287 NVIC_SetPriority(USB0_IRQn, 99); //Reduce Interrupt priority of USB
djbottrill 0:4d06e0867376 288
djbottrill 0:4d06e0867376 289 USBMIDI midi; //Start up MIDI
djbottrill 0:4d06e0867376 290 midi.attach(get_message); //callback for MIDI messages received
djbottrill 0:4d06e0867376 291
djbottrill 0:4d06e0867376 292 lcd.cls();
djbottrill 0:4d06e0867376 293 lcd.printf("MIDI Pipe Organ");
djbottrill 0:4d06e0867376 294 wait(1);
djbottrill 0:4d06e0867376 295 lcd.cls();
djbottrill 0:4d06e0867376 296 lcd.printf("On Chan Note Vel");
djbottrill 0:4d06e0867376 297 //Program user defined characters into OLED display for bar graph
djbottrill 0:4d06e0867376 298 lcd.setUDC(0, (char *) udc0);
djbottrill 0:4d06e0867376 299 lcd.setUDC(1, (char *) udc1);
djbottrill 0:4d06e0867376 300 lcd.setUDC(2, (char *) udc2);
djbottrill 0:4d06e0867376 301 lcd.setUDC(3, (char *) udc3);
djbottrill 0:4d06e0867376 302 lcd.setUDC(4, (char *) udc4);
djbottrill 0:4d06e0867376 303 lcd.setUDC(5, (char *) udc5);
djbottrill 0:4d06e0867376 304 lcd.setUDC(6, (char *) udc6);
djbottrill 0:4d06e0867376 305 lcd.setUDC(7, (char *) udc7);
djbottrill 0:4d06e0867376 306
djbottrill 0:4d06e0867376 307 key=0;
djbottrill 0:4d06e0867376 308 velocity=0;
djbottrill 0:4d06e0867376 309 chan=0;
djbottrill 0:4d06e0867376 310 onoff=0;
djbottrill 0:4d06e0867376 311
djbottrill 0:4d06e0867376 312 //Main Loop
djbottrill 0:4d06e0867376 313 while(1) {
djbottrill 0:4d06e0867376 314
djbottrill 7:e1ea1623c6c2 315 /*
djbottrill 7:e1ea1623c6c2 316 Additional code to de-bounce the K64F onboard switches again using multiple ticks to de-bounce; has 4 states:
djbottrill 7:e1ea1623c6c2 317 0 - Button not pressed
djbottrill 7:e1ea1623c6c2 318 1 - Button pressed waiting for de-bounce count of 100 ticks (4.53 mS)
djbottrill 7:e1ea1623c6c2 319 2 - Button press stable, this staus can be read as the de-bounced status indicating the button press is clean
djbottrill 7:e1ea1623c6c2 320 */
djbottrill 6:073e10217962 321 // De-bounce SW1
djbottrill 6:073e10217962 322 if (sw1_phase==0 & sw1==0) { //Button just been pressed
djbottrill 6:073e10217962 323 sw1_phase=1;
djbottrill 6:073e10217962 324 sw1_count=10;
djbottrill 6:073e10217962 325 }
djbottrill 6:073e10217962 326 if (sw1_phase==1 & sw1_count==0 & sw1==0) { //Button still pressed after de-bounce period
djbottrill 6:073e10217962 327 sw1_phase=2;
djbottrill 6:073e10217962 328 }
djbottrill 6:073e10217962 329 if (sw1_phase==2 & sw1==1) { //Button released
djbottrill 6:073e10217962 330 sw1_phase=0;
djbottrill 6:073e10217962 331 }
djbottrill 6:073e10217962 332 sw1_count--;
djbottrill 6:073e10217962 333 // De-bounce SW1
djbottrill 7:e1ea1623c6c2 334 if (sw3_phase==0 & sw3==0) { //Button just been pressed
djbottrill 7:e1ea1623c6c2 335 sw3_phase=1;
djbottrill 7:e1ea1623c6c2 336 sw3_count=10;
djbottrill 7:e1ea1623c6c2 337 }
djbottrill 7:e1ea1623c6c2 338 if (sw3_phase==1 & sw3_count==0 & sw3==0) { //Button still pressed after de-bounce period
djbottrill 7:e1ea1623c6c2 339 sw3_phase=2;
djbottrill 7:e1ea1623c6c2 340 }
djbottrill 6:073e10217962 341
djbottrill 7:e1ea1623c6c2 342 if (sw3_phase==2 & sw3==1) { //Button released
djbottrill 7:e1ea1623c6c2 343 sw3_phase=0;
djbottrill 7:e1ea1623c6c2 344 }
djbottrill 7:e1ea1623c6c2 345 sw3_count--;
djbottrill 6:073e10217962 346
djbottrill 6:073e10217962 347
djbottrill 6:073e10217962 348
djbottrill 6:073e10217962 349
djbottrill 0:4d06e0867376 350 if (sw1_phase==2 | sw3_phase==2) {
djbottrill 0:4d06e0867376 351 blueled=0;
djbottrill 0:4d06e0867376 352 } else {
djbottrill 0:4d06e0867376 353 blueled=1;
djbottrill 0:4d06e0867376 354 }
djbottrill 0:4d06e0867376 355
djbottrill 0:4d06e0867376 356
djbottrill 0:4d06e0867376 357 //Check for display mode button being presed
djbottrill 0:4d06e0867376 358 if (sw3_phase != sw3_old) { //Mode Switch pressed
djbottrill 0:4d06e0867376 359 if(sw3_phase==2) {
djbottrill 0:4d06e0867376 360 lcdmode++;
djbottrill 8:df5f305aab22 361 if (lcdmode>3) {
djbottrill 0:4d06e0867376 362 lcdmode=0;
djbottrill 0:4d06e0867376 363 }
djbottrill 0:4d06e0867376 364 lcd.cls();
djbottrill 0:4d06e0867376 365 if (lcdmode==0) {
djbottrill 0:4d06e0867376 366 lcd.printf("On Chan Note Vel");
djbottrill 0:4d06e0867376 367 }
djbottrill 0:4d06e0867376 368 if (lcdmode==1) {
djbottrill 0:4d06e0867376 369 //Initialise bar graph display
djbottrill 0:4d06e0867376 370
djbottrill 0:4d06e0867376 371 for (row=0; row<2; row++) {
djbottrill 0:4d06e0867376 372 for (pos=0; pos<16; pos++) {
djbottrill 0:4d06e0867376 373 display[row][pos]=0;
djbottrill 0:4d06e0867376 374 display_old[row][pos]=1;
djbottrill 0:4d06e0867376 375 }
djbottrill 0:4d06e0867376 376 }
djbottrill 0:4d06e0867376 377 }
djbottrill 0:4d06e0867376 378 if (lcdmode==2) {
djbottrill 0:4d06e0867376 379 lcd.locate(0,1);
djbottrill 0:4d06e0867376 380 lcd.printf("0123456789ABCDEF");
djbottrill 0:4d06e0867376 381 }
djbottrill 8:df5f305aab22 382 if (lcdmode==3) {
djbottrill 8:df5f305aab22 383 lcd.cls();
djbottrill 8:df5f305aab22 384 lcd.locate(0,0);
djbottrill 8:df5f305aab22 385 lcd.printf("Utilisation:");
djbottrill 8:df5f305aab22 386 }
djbottrill 0:4d06e0867376 387 }
djbottrill 0:4d06e0867376 388 }
djbottrill 0:4d06e0867376 389 sw3_old=sw3_phase;
djbottrill 0:4d06e0867376 390
djbottrill 0:4d06e0867376 391
djbottrill 0:4d06e0867376 392
djbottrill 0:4d06e0867376 393 // OLED MIDI Status display
djbottrill 0:4d06e0867376 394 if (lcdmode==0) {
djbottrill 0:4d06e0867376 395 lcd_stat=key+(128*velocity)+(16384*chan)+(262144*onoff);
djbottrill 0:4d06e0867376 396 if (lcd_stat!=lcd_stat_old) {
djbottrill 0:4d06e0867376 397
djbottrill 0:4d06e0867376 398 lcd.locate(0,1);
djbottrill 0:4d06e0867376 399 lcd.printf("%1d %2d %3d %3d", onoff, chan, key, velocity);
djbottrill 0:4d06e0867376 400 lcd_stat_old=lcd_stat;
djbottrill 0:4d06e0867376 401 }
djbottrill 0:4d06e0867376 402 }
djbottrill 0:4d06e0867376 403
djbottrill 0:4d06e0867376 404 // OLED MIDI Bar Display
djbottrill 0:4d06e0867376 405 if (lcdmode==1) {
djbottrill 0:4d06e0867376 406 keyidx=0;
djbottrill 0:4d06e0867376 407 for (row=1; row>=0; row--) {
djbottrill 0:4d06e0867376 408 for (pos=0; pos<16; pos++) {
djbottrill 0:4d06e0867376 409 keyidx_t=keyidx*2;
djbottrill 0:4d06e0867376 410 if(keyidx_t>94) {
djbottrill 0:4d06e0867376 411 keyidx_t=keyidx_t-95;
djbottrill 0:4d06e0867376 412 }
djbottrill 0:4d06e0867376 413 tval=keybuf[keyidx_t];
djbottrill 0:4d06e0867376 414 keyidx++;
djbottrill 0:4d06e0867376 415 keyidx_t=keyidx*2;
djbottrill 0:4d06e0867376 416 if(keyidx_t>94) {
djbottrill 0:4d06e0867376 417 keyidx_t=keyidx_t-95;
djbottrill 0:4d06e0867376 418 }
djbottrill 0:4d06e0867376 419 tval=tval+(2*keybuf[keyidx_t]);
djbottrill 0:4d06e0867376 420 keyidx++;
djbottrill 0:4d06e0867376 421
djbottrill 0:4d06e0867376 422 keyidx_t=keyidx*2;
djbottrill 0:4d06e0867376 423 if(keyidx_t>94) {
djbottrill 0:4d06e0867376 424 keyidx_t=keyidx_t-95;
djbottrill 0:4d06e0867376 425 }
djbottrill 0:4d06e0867376 426 tval=tval+(4*keybuf[keyidx_t]);
djbottrill 0:4d06e0867376 427 keyidx++;
djbottrill 0:4d06e0867376 428 display[row][pos]=tval;
djbottrill 0:4d06e0867376 429
djbottrill 0:4d06e0867376 430 if(display[row][pos]!=display_old[row][pos]) {
djbottrill 0:4d06e0867376 431 lcd.locate(pos,row);
djbottrill 0:4d06e0867376 432 lcd.putc(display[row][pos]);
djbottrill 0:4d06e0867376 433 display_old[row][pos]=display[row][pos];
djbottrill 0:4d06e0867376 434 }
djbottrill 0:4d06e0867376 435 }
djbottrill 0:4d06e0867376 436 }
djbottrill 0:4d06e0867376 437 }
djbottrill 0:4d06e0867376 438
djbottrill 0:4d06e0867376 439 //Display status of the Synth channels
djbottrill 0:4d06e0867376 440 if (lcdmode==2) {
djbottrill 0:4d06e0867376 441 lcd.locate(0,0);
djbottrill 0:4d06e0867376 442 for (noteidx=0; noteidx<16; noteidx++) {
djbottrill 0:4d06e0867376 443 lcd.putc((synthstat[noteidx]+48));
djbottrill 0:4d06e0867376 444 }
djbottrill 0:4d06e0867376 445 }
djbottrill 4:9f63e68b548e 446
djbottrill 8:df5f305aab22 447 //Display utilisation bar graph
djbottrill 8:df5f305aab22 448 if (lcdmode==3) {
djbottrill 8:df5f305aab22 449 x=0;
djbottrill 8:df5f305aab22 450 for (noteidx=0; noteidx<16; noteidx++) {
djbottrill 8:df5f305aab22 451 if (synthstat[noteidx] >0) {
djbottrill 8:df5f305aab22 452 x++;
djbottrill 8:df5f305aab22 453 }
djbottrill 8:df5f305aab22 454 }
djbottrill 8:df5f305aab22 455 for (pos=0; pos<x; pos++) {
djbottrill 8:df5f305aab22 456 display[1][pos]=0xff;
djbottrill 8:df5f305aab22 457 }
djbottrill 8:df5f305aab22 458 while(pos<16) {
djbottrill 8:df5f305aab22 459 display[1][pos]=0x20;
djbottrill 8:df5f305aab22 460 pos++;
djbottrill 8:df5f305aab22 461 }
djbottrill 8:df5f305aab22 462 row=1;
djbottrill 8:df5f305aab22 463 for (pos=0; pos<16; pos++) {
djbottrill 8:df5f305aab22 464 if (x!=x1) {
djbottrill 8:df5f305aab22 465 lcd.locate(13,0);
djbottrill 8:df5f305aab22 466 lcd.printf("%2d", x);
djbottrill 8:df5f305aab22 467 x1=x;
djbottrill 8:df5f305aab22 468 }
djbottrill 8:df5f305aab22 469 if(display[row][pos]!=display_old[row][pos]) {
djbottrill 8:df5f305aab22 470 lcd.locate(pos,row);
djbottrill 8:df5f305aab22 471 lcd.putc(display[row][pos]);
djbottrill 8:df5f305aab22 472 display_old[row][pos]=display[row][pos];
djbottrill 8:df5f305aab22 473 }
djbottrill 8:df5f305aab22 474 }
djbottrill 8:df5f305aab22 475 }
djbottrill 8:df5f305aab22 476
djbottrill 8:df5f305aab22 477
djbottrill 8:df5f305aab22 478
djbottrill 0:4d06e0867376 479 } //End of main loop
djbottrill 0:4d06e0867376 480 } //End of program
djbottrill 0:4d06e0867376 481
djbottrill 0:4d06e0867376 482
djbottrill 0:4d06e0867376 483
djbottrill 0:4d06e0867376 484