move MIDI defines to midi.h (#853)

The MIDIi defines would also be needed in uibuttons.cpp.
Create a common midi.h with the definitions.

---------

Co-authored-by: probonopd <probonopd@users.noreply.github.com>

src/midi.h

@@ -0,0 +1,48 @@
+//
+// midi.h
+//
+// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
+// Copyright (C) 2025  The MiniDexed Team
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+#ifndef _midi_h
+#define _midi_h
+
+#define MIDI_NOTE_OFF		0b1000
+#define MIDI_NOTE_ON		0b1001
+#define MIDI_AFTERTOUCH		0b1010			// TODO
+#define MIDI_CHANNEL_AFTERTOUCH 0b1101   // right now Synth_Dexed just manage Channel Aftertouch not Polyphonic AT -> 0b1010
+#define MIDI_CONTROL_CHANGE	0b1011
+
+#define MIDI_CC_BANK_SELECT_MSB		0
+#define MIDI_CC_MODULATION		1
+#define MIDI_CC_BREATH_CONTROLLER	2 
+#define MIDI_CC_FOOT_PEDAL 		4
+#define MIDI_CC_VOLUME			7
+#define MIDI_CC_PAN_POSITION		10
+#define MIDI_CC_EXPRESSION		11
+#define MIDI_CC_BANK_SELECT_LSB		32
+#define MIDI_CC_BANK_SUSTAIN		64
+#define MIDI_CC_RESONANCE		71
+#define MIDI_CC_FREQUENCY_CUTOFF	74
+#define MIDI_CC_REVERB_LEVEL		91
+#define MIDI_CC_DETUNE_LEVEL		94
+#define MIDI_CC_ALL_SOUND_OFF		120
+#define MIDI_CC_ALL_NOTES_OFF		123
+
+#define MIDI_PROGRAM_CHANGE	0b1100
+#define MIDI_PITCH_BEND		0b1110
+
+#endif

src/mididevice.cpp

@@ -27,32 +27,11 @@
 #include "config.h"
 #include <stdio.h>
 #include <assert.h>
+#include "midi.h"
 #include "userinterface.h"
 
 LOGMODULE ("mididevice");
 
-#define MIDI_NOTE_OFF		0b1000
-#define MIDI_NOTE_ON		0b1001
-#define MIDI_AFTERTOUCH		0b1010			// TODO
-#define MIDI_CHANNEL_AFTERTOUCH 0b1101   // right now Synth_Dexed just manage Channel Aftertouch not Polyphonic AT -> 0b1010
-#define MIDI_CONTROL_CHANGE	0b1011
-	#define MIDI_CC_BANK_SELECT_MSB		0
-	#define MIDI_CC_MODULATION		1
-	#define MIDI_CC_BREATH_CONTROLLER	2 
-	#define MIDI_CC_FOOT_PEDAL 		4
-	#define MIDI_CC_VOLUME			7
-	#define MIDI_CC_PAN_POSITION		10
-	#define MIDI_CC_EXPRESSION		11
-	#define MIDI_CC_BANK_SELECT_LSB		32
-	#define MIDI_CC_BANK_SUSTAIN		64
-	#define MIDI_CC_RESONANCE		71
-	#define MIDI_CC_FREQUENCY_CUTOFF	74
-	#define MIDI_CC_REVERB_LEVEL		91
-	#define MIDI_CC_DETUNE_LEVEL		94
-	#define MIDI_CC_ALL_SOUND_OFF		120
-	#define MIDI_CC_ALL_NOTES_OFF		123
-#define MIDI_PROGRAM_CHANGE	0b1100
-#define MIDI_PITCH_BEND		0b1110
 
 // MIDI "System" level (i.e. all TG) custom CC maps
 // Note: Even if number of TGs is not 8, there are only 8
@@ -302,7 +281,7 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 			}
 			if (nLength == 3)
 			{
-				m_pUI->UIMIDICmdHandler (ucChannel, ucStatus & 0xF0, pMessage[1], pMessage[2]);
+				m_pUI->UIMIDICmdHandler (ucChannel, ucType, pMessage[1], pMessage[2]);
 			}
 			break;
 
@@ -312,7 +291,7 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 			{
 				break;
 			}
-			m_pUI->UIMIDICmdHandler (ucChannel, ucStatus & 0xF0, pMessage[1], pMessage[2]);
+			m_pUI->UIMIDICmdHandler (ucChannel, ucType, pMessage[1], pMessage[2]);
 			break;
 
 		case MIDI_PROGRAM_CHANGE:

src/uibuttons.cpp

@@ -22,6 +22,7 @@
 #include <assert.h>
 #include <circle/timer.h>
 #include <string.h>
+#include "midi.h"
 
 LOGMODULE ("uibuttons");
 
@@ -490,22 +491,22 @@ void CUIButtons::ResetButton (unsigned pinNumber)
 	}
 }
 
-void CUIButtons::BtnMIDICmdHandler (unsigned nMidiCmd, unsigned nMidiData1, unsigned nMidiData2)
+void CUIButtons::BtnMIDICmdHandler (unsigned nMidiType, unsigned nMidiData1, unsigned nMidiData2)
 {
 	if (m_notesMidi > 0) {
-//		LOGDBG("BtnMIDICmdHandler (notes): %x %x %x)", nMidiCmd, nMidiData1, nMidiData2);
+//		LOGDBG("BtnMIDICmdHandler (notes): %x %x %x)", nMidiType, nMidiData1, nMidiData2);
 		// Using MIDI Note messages for MIDI buttons
 		unsigned midiPin = ccToMidiPin(nMidiData1);
 		for (unsigned i=0; i<MAX_BUTTONS; i++) {
 			if (m_buttons[i].getPinNumber() == midiPin) {
-				if (nMidiCmd == 0x80) {
-					// NoteOff = Button OFF
+				if (nMidiType == MIDI_NOTE_OFF) {
+					// Button OFF
 					m_buttons[i].Write (0);
-				} else if ((nMidiCmd == 0x90) && (nMidiData2 == 0)) {
-					// NoteOn with Vel == 0 = Button OFF
+				} else if ((nMidiType == MIDI_NOTE_ON) && (nMidiData2 == 0)) {
+					// Button OFF (MIDI_NOTE_ON with Vel == 0)
 					m_buttons[i].Write (0);
-				} else if (nMidiCmd == 0x90) {
-					// NoteOn = Button ON
+				} else if (nMidiType == MIDI_NOTE_ON) {
+					// Button ON
 					m_buttons[i].Write (127);
 				} else {
 					// Ignore other MIDI commands
@@ -513,9 +514,9 @@ void CUIButtons::BtnMIDICmdHandler (unsigned nMidiCmd, unsigned nMidiData1, unsi
 			}
 		}
 	} else {
-//		LOGDBG("BtnMIDICmdHandler (CC): %x %x %x)", nMidiCmd, nMidiData1, nMidiData2);
+//		LOGDBG("BtnMIDICmdHandler (CC): %x %x %x)", nMidiType, nMidiData1, nMidiData2);
 		// Using MIDI CC messages for MIDI buttons
-		if (nMidiCmd == 0xB0) {  // Control Message
+		if (nMidiType == MIDI_CONTROL_CHANGE) {
 			unsigned midiPin = ccToMidiPin(nMidiData1);
 			for (unsigned i=0; i<MAX_BUTTONS; i++) {
 				if (m_buttons[i].getPinNumber() == midiPin) {

src/uibuttons.h

@@ -124,7 +124,7 @@ public:
 
 	void ResetButton (unsigned pinNumber);
 
-	void BtnMIDICmdHandler (unsigned nMidiCmd, unsigned nMidiData1, unsigned nMidiData2);
+	void BtnMIDICmdHandler (unsigned nMidiType, unsigned nMidiData1, unsigned nMidiData2);
 	
 private:
 	CConfig *m_pConfig;

src/userinterface.cpp

@@ -396,7 +396,7 @@ void CUserInterface::UIButtonsEventStub (CUIButton::BtnEvent Event, void *pParam
 	pThis->UIButtonsEventHandler (Event);
 }
 
-void CUserInterface::UIMIDICmdHandler (unsigned nMidiCh, unsigned nMidiCmd, unsigned nMidiData1, unsigned nMidiData2)
+void CUserInterface::UIMIDICmdHandler (unsigned nMidiCh, unsigned nMidiType, unsigned nMidiData1, unsigned nMidiData2)
 {
 	if (m_nMIDIButtonCh == CMIDIDevice::Disabled)
 	{
@@ -411,7 +411,7 @@ void CUserInterface::UIMIDICmdHandler (unsigned nMidiCh, unsigned nMidiCmd, unsi
 	
 	if (m_pUIButtons)
 	{
-		m_pUIButtons->BtnMIDICmdHandler (nMidiCmd, nMidiData1, nMidiData2);
+		m_pUIButtons->BtnMIDICmdHandler (nMidiType, nMidiData1, nMidiData2);
 	}
 }
 

src/userinterface.h

@@ -55,7 +55,7 @@ public:
 			   bool bArrowDown, bool bArrowUp);
 
 	// To be called from the MIDI device on reception of a MIDI CC message
-	void UIMIDICmdHandler (unsigned nMidiCh, unsigned nMidiCmd, unsigned nMidiData1, unsigned nMidiData2);
+	void UIMIDICmdHandler (unsigned nMidiCh, unsigned nMidiType, unsigned nMidiData1, unsigned nMidiData2);
 
 private:
 	void LCDWrite (const char *pString);		// Print to optional HD44780 display