Stefan Imrich
Simple midi controller for Freedom KL25 board which generates tone (midi signal) according X-axis accelerometer. Modulation wheel is controlled by Y-axis and pitch wheel is controlled by touch slider
Dependencies: MMA8451Q TSI USBDevice mbed
Fork of
Midiudelator
by 
Pavel M
Revision 5:421d532c6403, committed 2013-08-20
- Comitter:
- stefanimrich
- Date:
- Tue Aug 20 20:37:42 2013 +0000
- Parent:
- 4:9c81faf1b372
- Commit message:
- X-axis plays 4 octave tones; Y-axes controls modulation wheel; touch slider controls pitch wheel
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r 9c81faf1b372 -r 421d532c6403 main.cpp
--- a/main.cpp Mon Aug 19 12:16:44 2013 +0000
+++ b/main.cpp Tue Aug 20 20:37:42 2013 +0000
@@ -5,21 +5,38 @@
#define MMA8451_I2C_ADDRESS (0x1d<<1)
-#define C1 0
-#define D1 0.125
-#define E1 0.250
-#define F1 0.375
-#define G1 0.5
-#define A1 0.625
-#define H1 0.750
-#define C2 0.875
-#define D2 1
-#define E2 1.125
-#define F2 1.250
-#define G2 1.375
-#define A2 1.5
-#define H2 1.625
-#define C3 1.750
+#define C1 0,187
+#define D1 0.250
+#define E1 0.312
+#define F1 0.375
+#define G1 0.437
+#define A1 0.5
+#define B1 0.562
+#define C2 0.625
+#define D2 0.687
+#define E2 0.750
+#define F2 0.812
+#define G2 0.875
+#define A2 0.937
+#define B2 1
+#define C3 1.062
+#define D3 1.125
+#define E3 1,187
+#define F3 1.250
+#define G3 1.312
+#define A3 1.375
+#define B3 1.437
+#define C4 1.5
+#define D4 1.562
+#define E4 1.625
+#define F4 1.687
+#define G4 1.749
+#define A4 1.811
+#define B4 1.873
+
+//1.935
+
+
#define NC1 48
#define ND1 50
@@ -27,26 +44,28 @@
#define NF1 53
#define NG1 55
#define NA1 57
-#define NH1 59
+#define NB1 59
#define NC2 60
#define ND2 62
#define NE2 64
#define NF2 65
#define NG2 67
#define NA2 69
-#define NH2 71
+#define NB2 71
#define NC3 72
-
-/* tempo delays */
-#define EITH 5
-#define QUATER 25
-#define HALF 50
-#define FULL 75
-
-#define T_EITH 0.08 /* set the basic dealy here */
-#define T_QUATER (T_EITH*2)
-#define T_HALF (T_QUATER*2)
-#define T_FULL (T_HALF*2)
+#define ND3 74
+#define NE3 76
+#define NF3 77
+#define NG3 79
+#define NA3 81
+#define NB3 83
+#define NC4 84
+#define ND4 86
+#define NE4 88
+#define NF4 89
+#define NG4 91
+#define NA4 93
+#define NB4 95
Serial pc(USBTX,USBRX);
USBMIDI midi;
@@ -76,11 +95,11 @@
int main() {
- int note=48;
+ int note=48, n=48;
float notechng;
- float fpitch;
- int tempo;
- float pause = T_HALF;
+ int pitch;
+ int modulation;
+ float m;
MMA8451Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS);
@@ -88,34 +107,28 @@
while (1) {
#if 0
+ /* TEST CODE */
/* test pitch - commented in in - endif*/
midi.write(MIDIMessage::NoteOn(57));
- for(int c=-8000; c<8000; c= c+100){
+ for(int c=0; c<127; c= c+1){
- midi.write(MIDIMessage::PitchWheel(c));
+ midi.write(MIDIMessage::ControlChange(1, c));
+ //midi.write(MIDIMessage::PitchWheel(c));
pc.printf("Pitch: %d \n", c);
}
midi.write(MIDIMessage::NoteOff(57));
wait(0.5);
#endif
-
+#if 1
/* read note */
notechng = 1 - acc.getAccX();
- /* get pitch */
- fpitch = acc.getAccY()*100;
-
- /* get tempo */
- tempo =int(tsi.readPercentage() * 100);
+
+ /* get modulatio */
+ m = ((1 + acc.getAccY()) * 63);
+ modulation = int(m);
- pause = T_EITH;
- if(tempo > QUATER) pause = T_QUATER;
- if(tempo > HALF) pause = T_HALF;
- if(tempo > FULL) pause = T_FULL;
-
- pc.printf("pause: %f, note: %f, pitch: %d \n",pause, note, (int)fpitch*100);
-
- midi.write(MIDIMessage::NoteOff(note));
- wait(pause);
+ /* get pitch */
+ pitch = (int(tsi.readPercentage() * 8192) - 8192);
if(notechng > C1) note= NC1;
if(notechng > D1) note= ND1;
@@ -123,20 +136,42 @@
if(notechng > F1) note= NF1;
if(notechng > G1) note= NG1;
if(notechng > A1) note= NA1;
- if(notechng > H1) note= NH1;
+ if(notechng > B1) note= NB1;
if(notechng > C2) note= NC2;
if(notechng > D2) note= ND2;
if(notechng > E2) note= NE2;
if(notechng > F2) note= NF2;
if(notechng > G2) note= NG2;
if(notechng > A2) note= NA2;
- if(notechng > H2) note= NH2;
- if(notechng > C3) note= NC3;
+ if(notechng > B2) note= NB2;
+ if(notechng > C3) note= NC3;
+ if(notechng > D3) note= ND3;
+// if(notechng > E3) note= NE3;
+ if(notechng > F3) note= NF3;
+ if(notechng > G3) note= NG3;
+ if(notechng > A3) note= NA3;
+ if(notechng > B3) note= NB3;
+ if(notechng > C4) note= NC4;
+ if(notechng > D4) note= ND4;
+ if(notechng > E4) note= NE4;
+ if(notechng > F4) note= NF4;
+ if(notechng > G4) note= NG4;
+ if(notechng > A4) note= NA4;
+ if(notechng > B4) note= NB4;
+
+ pc.printf("note: %d \n", note);
+ pc.printf("notechng: %f \n", notechng);
- midi.write(MIDIMessage::NoteOn(note));
- midi.write(MIDIMessage::PitchWheel(int(fpitch)));
-
- wait(pause);
-
+ if (note != n) {
+ midi.write(MIDIMessage::NoteOff(n));
+ n=note;
+ midi.write(MIDIMessage::NoteOn(n));
+ }
+
+ midi.write(MIDIMessage::ControlChange(1, modulation));
+ midi.write(MIDIMessage::PitchWheel(pitch));
+
+ wait(0.1);
+#endif
}
}
\ No newline at end of file