updates midi functionality (#331)

* implements leader key for planck experimental

* allows override of leader timeout

* adds ability to use the leader key in seq

* fixes leader keycode

* adds chording prototype

* fixes keycode detection

* moves music mode to quantum.c

* disables chording by default

* adds music sequencer functionality

* implements audio/music functions in quantum.c

* splits up process_action to allow independent processing of actions

* moves midi stuff to quantum.c

* adds additional scales for midi

5 files changed, 93 insertions, 14 deletions

diff --git a/quantum/keymap_common.c b/quantum/keymap_common.c
index 0184770c4b..2aae13e679 100644
--- a/quantum/keymap_common.c
+++ b/quantum/keymap_common.c
@@ -282,11 +282,6 @@ static action_t keycode_to_action(uint16_t keycode)
                 action.code = ACTION_MODS_ONESHOT(mod);
             }
             break;
-    #ifdef MIDI_ENABLE
-        case 0x6000 ... 0x6FFF:
-            action.code =  ACTION_FUNCTION_OPT(keycode & 0xFF, (keycode & 0x0F00) >> 8);
-            break;
-    #endif
         case 0x7000 ... 0x7FFF:
             action.code = ACTION_MODS_TAP_KEY((keycode >> 0x8) & 0xF, keycode & 0xFF);
             break;
diff --git a/quantum/keymap_common.h b/quantum/keymap_common.h
index 0074ab164d..07020150ae 100644
--- a/quantum/keymap_common.h
+++ b/quantum/keymap_common.h
@@ -195,6 +195,7 @@ extern const uint16_t fn_actions[];
 
 
 
+
 // MAGIC keycodes
 #define MAGIC_SWAP_CONTROL_CAPSLOCK      0x5002
 #define MAGIC_UNSWAP_CONTROL_CAPSLOCK    0x5003
@@ -232,6 +233,10 @@ extern const uint16_t fn_actions[];
 #define MUV_IN 0x5024
 #define MUV_DE 0x5025
 
+// Midi mode on/off
+#define MI_ON  0x5026
+#define MI_OFF 0x5027
+
 // GOTO layer - 16 layers max
 // when:
 // ON_PRESS    = 1
diff --git a/quantum/quantum.c b/quantum/quantum.c
index dd5d84f826..5a978d3320 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -19,11 +19,15 @@ void leader_end(void) {}
 
 #ifdef AUDIO_ENABLE
   uint8_t starting_note = 0x0C;
-  int offset = 0;
+  int offset = 7;
   bool music_activated = false;
   float music_scale[][2] = SONG(MUSIC_SCALE_SOUND);
 #endif
 
+#ifdef MIDI_ENABLE
+  bool midi_activated = false;
+#endif
+
 // Leader key stuff
 bool leading = false;
 uint16_t leader_time = 0;
@@ -98,6 +102,82 @@ bool process_record_quantum(keyrecord_t *record) {
     //   return false;
     // }
 
+  #ifdef MIDI_ENABLE
+    if (keycode == MI_ON && record->event.pressed) {
+      midi_activated = true;
+      PLAY_NOTE_ARRAY(music_scale, false, 0);
+      return false;
+    }
+
+    if (keycode == MI_OFF && record->event.pressed) {
+      midi_activated = false;
+      midi_send_cc(&midi_device, 0, 0x7B, 0);
+      return false;
+    }
+
+    if (midi_activated) {
+      if (record->event.key.col == (MATRIX_COLS - 1) && record->event.key.row == (MATRIX_ROWS - 1)) {
+          if (record->event.pressed) {
+              starting_note++; // Change key
+              midi_send_cc(&midi_device, 0, 0x7B, 0);
+              // midi_send_cc(&midi_device, 1, 0x7B, 0);
+              // midi_send_cc(&midi_device, 2, 0x7B, 0);
+              // midi_send_cc(&midi_device, 3, 0x7B, 0);
+              // midi_send_cc(&midi_device, 4, 0x7B, 0);
+          }
+          return false;
+      }
+      if (record->event.key.col == (MATRIX_COLS - 2) && record->event.key.row == (MATRIX_ROWS - 1)) {
+          if (record->event.pressed) {
+              starting_note--; // Change key
+              midi_send_cc(&midi_device, 0, 0x7B, 0);
+              // midi_send_cc(&midi_device, 1, 0x7B, 0);
+              // midi_send_cc(&midi_device, 2, 0x7B, 0);
+              // midi_send_cc(&midi_device, 3, 0x7B, 0);
+              // midi_send_cc(&midi_device, 4, 0x7B, 0);
+          }
+          return false;
+      }
+      if (record->event.key.col == (MATRIX_COLS - 3) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) {
+          offset++; // Change scale
+          midi_send_cc(&midi_device, 0, 0x7B, 0);
+          // midi_send_cc(&midi_device, 1, 0x7B, 0);
+          // midi_send_cc(&midi_device, 2, 0x7B, 0);
+          // midi_send_cc(&midi_device, 3, 0x7B, 0);
+          // midi_send_cc(&midi_device, 4, 0x7B, 0);
+          return false;
+      }
+      if (record->event.key.col == (MATRIX_COLS - 4) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) {
+          offset--; // Change scale
+          midi_send_cc(&midi_device, 0, 0x7B, 0);
+          // midi_send_cc(&midi_device, 1, 0x7B, 0);
+          // midi_send_cc(&midi_device, 2, 0x7B, 0);
+          // midi_send_cc(&midi_device, 3, 0x7B, 0);
+          // midi_send_cc(&midi_device, 4, 0x7B, 0);
+          return false;
+      }
+      // basic
+      // uint8_t note = (starting_note + SCALE[record->event.key.col + offset])+12*(MATRIX_ROWS - record->event.key.row);
+      // advanced
+      // uint8_t note = (starting_note + record->event.key.col + offset)+12*(MATRIX_ROWS - record->event.key.row);
+      // guitar
+      uint8_t note = (starting_note + record->event.key.col + offset)+5*(MATRIX_ROWS - record->event.key.row);
+      // violin
+      // uint8_t note = (starting_note + record->event.key.col + offset)+7*(MATRIX_ROWS - record->event.key.row);
+
+      if (record->event.pressed) {
+        // midi_send_noteon(&midi_device, record->event.key.row, starting_note + SCALE[record->event.key.col], 127);
+        midi_send_noteon(&midi_device, 0, note, 127);
+      } else {
+        // midi_send_noteoff(&midi_device, record->event.key.row, starting_note + SCALE[record->event.key.col], 127);
+        midi_send_noteoff(&midi_device, 0, note, 127);
+      }
+
+      if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through
+        return false;
+    }
+  #endif
+
   #ifdef AUDIO_ENABLE
     if (keycode == AU_ON && record->event.pressed) {
       audio_on();
@@ -169,7 +249,7 @@ bool process_record_quantum(keyrecord_t *record) {
         return false;
       }
 
-      float freq = ((float)220.0)*pow(2.0, -4.0)*pow(2.0,(starting_note + SCALE[record->event.key.col + offset])/12.0+(MATRIX_ROWS - record->event.key.row));
+      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(starting_note + SCALE[record->event.key.col + offset])/12.0+(MATRIX_ROWS - record->event.key.row));
       if (record->event.pressed) {
         play_note(freq, 0xF);
         if (music_sequence_recording) {
@@ -185,8 +265,6 @@ bool process_record_quantum(keyrecord_t *record) {
     }
   #endif
 
-
-
 #ifndef DISABLE_LEADER
   // Leader key set-up
   if (record->event.pressed) {
@@ -267,6 +345,6 @@ void matrix_scan_quantum() {
   }
 
   #endif
-  
+
   matrix_scan_kb();
 }
\ No newline at end of file
diff --git a/quantum/quantum.h b/quantum/quantum.h
index db726ad425..bfecdb2626 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -13,7 +13,8 @@
   #include "audio.h"
 #endif
 #ifdef MIDI_ENABLE
-	#include <keymap_midi.h>
+	// #include <keymap_midi.h>
+	#include <lufa.h>
 #endif
 #include "action_layer.h"
 #include "eeconfig.h"
diff --git a/quantum/quantum.mk b/quantum/quantum.mk
index b45ad850ab..e7ccfd6598 100644
--- a/quantum/quantum.mk
+++ b/quantum/quantum.mk
@@ -24,9 +24,9 @@ ifndef CUSTOM_MATRIX
 	SRC += $(QUANTUM_DIR)/matrix.c
 endif
 
-ifeq ($(strip $(MIDI_ENABLE)), yes)
-	SRC += $(QUANTUM_DIR)/keymap_midi.c
-endif
+#ifeq ($(strip $(MIDI_ENABLE)), yes)
+#	SRC += $(QUANTUM_DIR)/keymap_midi.c
+#endif
 
 ifeq ($(strip $(AUDIO_ENABLE)), yes)
     SRC += $(QUANTUM_DIR)/audio/audio.c