add DAW Controller support for various Arturia controllers

MiniLab 3
Keylab Essential
KeyLab Essential mk3
KeyLab mkII

based on https://github.com/PrzemekBarski/arturia-keylab-essential-mk3-programming-guide

Tested on a Arturia MiniLab 3 and KeyLab mkII

Keylab Essential and Keylab Essential mk3 is not tested

src/Makefile

@@ -9,7 +9,8 @@ CMSIS_DIR = ../CMSIS_5/CMSIS
 OBJS = main.o kernel.o minidexed.o config.o userinterface.o uimenu.o \
        mididevice.o midikeyboard.o serialmididevice.o pckeyboard.o \
        sysexfileloader.o performanceconfig.o perftimer.o \
-       effect_compressor.o effect_platervbstereo.o uibuttons.o midipin.o
+       effect_compressor.o effect_platervbstereo.o uibuttons.o midipin.o \
+       dawcontroller.o
 
 OPTIMIZE = -O3
 

src/common.h

@@ -2,6 +2,8 @@
 #ifndef _common_h
 #define _common_h
 
+#define ARRAY_LENGTH(x) (sizeof(x) / sizeof((x)[0]))
+
 inline long maplong(long x, long in_min, long in_max, long out_min, long out_max) {
   return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 }
@@ -16,6 +18,12 @@ inline float32_t mapfloat(int val, int in_min, int in_max, float32_t out_min, fl
   return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 }
 
+inline long mapfloatr(int val, int in_min, int in_max, float32_t out_min, float32_t out_max)
+{
+  return lround((val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min);
+}
+
+
 #define constrain(amt, low, high) ({ \
   __typeof__(amt) _amt = (amt); \
   __typeof__(low) _low = (low); \

src/config.cpp

@@ -204,7 +204,9 @@ void CConfig::Load (void)
 	m_MIDIButtonActionBankDown = m_Properties.GetString ("MIDIButtonActionBankDown", "");
 	m_MIDIButtonActionTGUp = m_Properties.GetString ("MIDIButtonActionTGUp", "");
 	m_MIDIButtonActionTGDown = m_Properties.GetString ("MIDIButtonActionTGDown", "");
-
+
+	m_bDAWControllerEnabled = m_Properties.GetNumber ("DAWControllerEnabled", 0) != 0;
+
 	m_bEncoderEnabled = m_Properties.GetNumber ("EncoderEnabled", 0) != 0;
 	m_nEncoderPinClock = m_Properties.GetNumber ("EncoderPinClock", 10);
 	m_nEncoderPinData = m_Properties.GetNumber ("EncoderPinData", 9);
@@ -751,6 +753,11 @@ const char *CConfig::GetMIDIButtonActionTGDown (void) const
 	return m_MIDIButtonActionTGDown.c_str();
 }
 
+bool CConfig::GetDAWControllerEnabled (void) const
+{
+	return m_bDAWControllerEnabled;
+}
+
 bool CConfig::GetEncoderEnabled (void) const
 {
 	return m_bEncoderEnabled;

src/config.h

@@ -240,6 +240,8 @@ class CConfig		// Configuration for MiniDexed
 	const char *GetMIDIButtonActionTGUp (void) const;
 	const char *GetMIDIButtonActionTGDown (void) const;
 
+	bool GetDAWControllerEnabled (void) const;
+
 	// KY-040 Rotary Encoder
 	// GPIO pin numbers are chip numbers, not header positions
 	bool GetEncoderEnabled (void) const;
@@ -371,6 +373,8 @@ class CConfig		// Configuration for MiniDexed
 	unsigned m_nMIDIButtonTGUp;
 	unsigned m_nMIDIButtonTGDown;
 
+	bool m_bDAWControllerEnabled;
+
 	bool m_bEncoderEnabled;
 	unsigned m_nEncoderPinClock;
 	unsigned m_nEncoderPinData;