Revision 2:21f0ae3bef8a, committed 2014-12-09

Comitter:

ywang627

Date:

Tue Dec 09 00:03:45 2014 +0000

Parent:

1:2b551cb862fe

Commit message:

Code for Laser Harp Implementation with MBed.

Changed in this revision

--- a/main.cpp	Mon Dec 08 22:01:13 2014 +0000
+++ b/main.cpp	Tue Dec 09 00:03:45 2014 +0000
@@ -62,21 +62,70 @@
 // constructor(i2c object, i2c address of the mpr121)
 Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
 
-void fallInterrupt()
-{
-    int key_code=0;
+int fs;
+int octave;
+void fallInterrupt() {
+    int fs_code=0;
+    int oct_code = 0;
     int i=0;
     int value=mpr121.read(0x00);
     value +=mpr121.read(0x01)<<8;
+    // LED demo mod by J. Hamblen
+    //pc.printf("MPR value: %x \r\n", value);
     i=0;
-    for (i=0; i<12; i++) {
-        if (((value>>i)&0x01)==1) key_code=i+1;
+    // puts key number out to LEDs for demo
+    for (i=0; i<4; i++) {
+        if (((value>>i)&0x01)==1) fs_code=i+1;
+        }
+    switch (fs_code)
+    {
+        case 1:
+        fs = 1;
+        led1 = 1;
+        led2 = 0;
+        break;
+        case 2:
+        fs = 0;
+        led1 = 0;
+        led2 = 0;
+        break;
+        case 3:
+        fs = -1;
+        led1 = 0;
+        led2 = 1;
+        break;
+        case 4:
+        fs = 0;
+        octave = 0;
+        led1 = 0;
+        led2 = 0;
+        led3 = 0;
+        led4 = 0;
+        break;
     }
-    led4=key_code & 0x01;
-    led3=(key_code>>1) & 0x01;
-    led2=(key_code>>2) & 0x01;
-    led1=(key_code>>3) & 0x01;
-    interupt = key_code;
+                        
+    for (i=4; i<7; i++) {
+        if (((value>>i)&0x01)==1) oct_code=i;
+    }
+    switch (oct_code)
+    {
+        case 4:
+        octave = 12;
+        led3= 1;
+        led4 = 0;
+        break;
+        case 5:
+        octave = 0;
+        led3 = 0;
+        led4 = 0;
+        break;
+        case 6:
+        octave = -12;
+        led3 = 0;
+        led4 = 1;
+        break;
+    }
+
 }
 
 USBMIDI midi;
@@ -125,46 +174,46 @@
         if (val1 <0.7 && pval1 > 0.7) {
             flag1 = 1;
         } else if (val1 < 0.7 && flag1 ==1) {
-            midi.write(MIDIMessage::NoteOn(60+interupt));
+            midi.write(MIDIMessage::NoteOn(60+fs+octave));
             flag1 = 0;
         } else if (val1 >0.7) {
-            midi.write(MIDIMessage::NoteOff(60+interupt));
+            midi.write(MIDIMessage::NoteOff(60+fs+octave));
             flag1 = 0;
         }
         if (val2 <0.7 && pval2 > 0.7) {
             flag2 = 1;
         } else if (val2 < 0.7 && flag2 ==1) {
-            midi.write(MIDIMessage::NoteOn(62+interupt));
+            midi.write(MIDIMessage::NoteOn(62+fs+octave));
             flag2 = 0;
         } else if (val2 >0.7) {
-            midi.write(MIDIMessage::NoteOff(62+interupt));
+            midi.write(MIDIMessage::NoteOff(62+fs+octave));
             flag2 = 0;
         }
         if (val3 <0.7 && pval3 > 0.7) {
             flag3 = 1;
         } else if (val3 < 0.7 && flag3 ==1) {
-            midi.write(MIDIMessage::NoteOn(64+interupt));
+            midi.write(MIDIMessage::NoteOn(64+fs+octave));
             flag3 = 0;
         } else if (val3 >0.7) {
-            midi.write(MIDIMessage::NoteOff(64+interupt));
+            midi.write(MIDIMessage::NoteOff(64+fs+octave));
             flag3 = 0;
         }
         if (val4 <0.7 && pval4 > 0.7) {
             flag4 = 1;
         } else if (val4 < 0.7 && flag4 ==1) {
-            midi.write(MIDIMessage::NoteOn(65+interupt));
+            midi.write(MIDIMessage::NoteOn(65+fs+octave));
             flag4 = 0;
         } else if (val4 >0.7) {
-            midi.write(MIDIMessage::NoteOff(65+interupt));
+            midi.write(MIDIMessage::NoteOff(65+fs+octave));
             flag4 = 0;
         }
         if (val5 <0.7 && pval5 > 0.7) {
             flag5 = 1;
         } else if (val5 < 0.7 && flag5 ==1) {
-            midi.write(MIDIMessage::NoteOn(67+interupt));
+            midi.write(MIDIMessage::NoteOn(67+fs+octave));
             flag5 = 0;
         } else if (val5 >0.7) {
-            midi.write(MIDIMessage::NoteOff(67+interupt));
+            midi.write(MIDIMessage::NoteOff(67+fs+octave));
             flag5 = 0;
         }
     }