From 0865496d76d03c70640a76de3cdbf8645a1127c6 Mon Sep 17 00:00:00 2001
From: Philippe G <philippe44@users.noreply.github.com>
Date: Sun, 2 Aug 2020 23:13:46 -0700
Subject: [PATCH] porting master changes

There is a divergence in accessors.c that I've not resolved
---
 build-scripts/ESP32-A1S-sdkconfig.defaults    |   3 +
 build-scripts/I2S-4MFlash-sdkconfig.defaults  |   2 +
 .../SqueezeAmp4MBFlash-sdkconfig.defaults     |   3 +
 .../SqueezeAmp8MBFlash-sdkconfig.defaults     |   3 +
 components/config/config.c                    |  12 ++
 components/display/SH1106.c                   |  12 +-
 components/display/SSD1306.c                  |  12 +-
 components/display/SSD1322.c                  |  18 +-
 components/display/SSD132x.c                  |  24 +--
 components/display/SSD1351.c                  |  32 ++-
 components/display/ST77xx.c                   |  83 +++++---
 components/display/core/gds.c                 |   3 +-
 components/display/core/gds.h                 |   3 +-
 components/display/core/gds_private.h         |   9 +-
 components/display/display.c                  |  14 +-
 components/services/accessors.c               |   2 +-
 components/services/led.c                     |   4 +-
 components/squeezelite/{a1s => ac101}/ac101.c |  37 ++--
 components/squeezelite/{a1s => ac101}/ac101.h |   0
 components/squeezelite/adac.h                 |  11 +-
 components/squeezelite/component.mk           |   4 +-
 components/squeezelite/decode_external.c      |   1 -
 components/squeezelite/display.c              |   3 +-
 .../squeezelite/external/dac_external.c       | 177 +++++++++++++---
 components/squeezelite/output_i2s.c           | 126 +++++++----
 components/squeezelite/tas57xx/dac_57xx.c     |  82 +++-----
 main/Kconfig.projbuild                        | 198 +++++++++++-------
 main/esp_app_main.c                           |   3 +-
 28 files changed, 544 insertions(+), 337 deletions(-)
 rename components/squeezelite/{a1s => ac101}/ac101.c (92%)
 rename components/squeezelite/{a1s => ac101}/ac101.h (100%)

diff --git a/build-scripts/ESP32-A1S-sdkconfig.defaults b/build-scripts/ESP32-A1S-sdkconfig.defaults
index 14bc9550..6084e57f 100644
--- a/build-scripts/ESP32-A1S-sdkconfig.defaults
+++ b/build-scripts/ESP32-A1S-sdkconfig.defaults
@@ -2,6 +2,9 @@
 # Automatically generated file. DO NOT EDIT.
 # Espressif IoT Development Framework (ESP-IDF) Project Configuration
 #
+CONFIG_DAC_CONFIG="model=AC101,bck=27,ws=26,do=25,di=35,sda=33,scl=32"
+CONFIG_MUTE_GPIO=-1
+CONFIG_MUTE_GPIO_LEVEL=-1
 CONFIG_IDF_TARGET_ESP32=y
 CONFIG_IDF_TARGET="esp32"
 CONFIG_IDF_FIRMWARE_CHIP_ID=0x0000
diff --git a/build-scripts/I2S-4MFlash-sdkconfig.defaults b/build-scripts/I2S-4MFlash-sdkconfig.defaults
index 7977cc56..b774ac99 100644
--- a/build-scripts/I2S-4MFlash-sdkconfig.defaults
+++ b/build-scripts/I2S-4MFlash-sdkconfig.defaults
@@ -2,6 +2,8 @@
 # Automatically generated file. DO NOT EDIT.
 # Espressif IoT Development Framework (ESP-IDF) Project Configuration
 #
+CONFIG_MUTE_GPIO=-1
+CONFIG_MUTE_GPIO_LEVEL=-1
 CONFIG_IDF_TARGET_ESP32=y
 CONFIG_IDF_TARGET="esp32"
 CONFIG_IDF_FIRMWARE_CHIP_ID=0x0000
diff --git a/build-scripts/SqueezeAmp4MBFlash-sdkconfig.defaults b/build-scripts/SqueezeAmp4MBFlash-sdkconfig.defaults
index ae971612..7d8fece2 100644
--- a/build-scripts/SqueezeAmp4MBFlash-sdkconfig.defaults
+++ b/build-scripts/SqueezeAmp4MBFlash-sdkconfig.defaults
@@ -118,6 +118,9 @@ CONFIG_SPKFAULT_GPIO=2
 CONFIG_SPKFAULT_GPIO_LEVEL=0
 CONFIG_BAT_CHANNEL=7
 CONFIG_BAT_SCALE="20.24"
+CONFIG_SPDIF_CONFIG="bck=33,ws=25,do=15"
+CONFIG_DAC_CONFIG="model=TAS57xx,bck=33,ws=25,do=32,sda=27,scl=26,mute=14:0"
+CONFIG_MUTE_GPIO_LEVEL=-1
 CONFIG_WIFI_MANAGER_TASK_PRIORITY=5
 CONFIG_WIFI_MANAGER_MAX_RETRY=2
 CONFIG_DEFAULT_AP_SSID="squeezelite"
diff --git a/build-scripts/SqueezeAmp8MBFlash-sdkconfig.defaults b/build-scripts/SqueezeAmp8MBFlash-sdkconfig.defaults
index fbcab847..031308b7 100644
--- a/build-scripts/SqueezeAmp8MBFlash-sdkconfig.defaults
+++ b/build-scripts/SqueezeAmp8MBFlash-sdkconfig.defaults
@@ -117,6 +117,9 @@ CONFIG_SPKFAULT_GPIO=2
 CONFIG_SPKFAULT_GPIO_LEVEL=0
 CONFIG_BAT_CHANNEL=7
 CONFIG_BAT_SCALE="20.24"
+CONFIG_SPDIF_CONFIG="bck=33,ws=25,do=15"
+CONFIG_DAC_CONFIG="model=TAS57xx,bck=33,ws=25,do=32,sda=27,scl=26,mute=14"
+CONFIG_MUTE_GPIO_LEVEL=-1
 CONFIG_WIFI_MANAGER_TASK_PRIORITY=5
 CONFIG_WIFI_MANAGER_MAX_RETRY=2
 CONFIG_DEFAULT_AP_SSID="squeezelite"
diff --git a/components/config/config.c b/components/config/config.c
index 65ee41ab..c5515209 100644
--- a/components/config/config.c
+++ b/components/config/config.c
@@ -611,9 +611,21 @@ void config_delete_key(const char *key){
 	}
 	config_unlock();
 }
+
 void * config_alloc_get(nvs_type_t nvs_type, const char *key) {
 	return config_alloc_get_default(nvs_type, key, NULL, 0);
 }
+
+void * config_alloc_get_str(const char *key, char *lead, char *fallback) {
+	if (lead && *lead) return strdup(lead);
+	char *value = config_alloc_get_default(NVS_TYPE_STR, key, NULL, 0);
+	if ((!value || !*value) && fallback) {
+		if (value) free(value);
+		value = strdup(fallback);
+	}
+	return value;
+}
+
 void * config_alloc_get_default(nvs_type_t nvs_type, const char *key, void * default_value, size_t blob_size) {
 
 	void * value = NULL;
diff --git a/components/display/SH1106.c b/components/display/SH1106.c
index 089efa1a..a08a3116 100644
--- a/components/display/SH1106.c
+++ b/components/display/SH1106.c
@@ -73,8 +73,11 @@ static void Update( struct GDS_Device* Device ) {
 #endif	
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { Device->WriteCommand( Device, On ? 0xA1 : 0xA0 ); }
-static void SetVFlip( struct GDS_Device *Device, bool On ) { Device->WriteCommand( Device, On ? 0xC8 : 0xC0 ); }
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) {
+	Device->WriteCommand( Device, HFlip ? 0xA1 : 0xA0 );
+	Device->WriteCommand( Device, VFlip ? 0xC8 : 0xC0 );
+}	
+
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAF ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAE ); }
 
@@ -117,8 +120,7 @@ static bool Init( struct GDS_Device* Device ) {
     Device->WriteCommand( Device, 0x40 + 0x00 );
 	Device->SetContrast( Device, 0x7F );
 	// set flip modes
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	Device->SetLayout( Device, false, false, false );
 	// no Display Inversion
     Device->WriteCommand( Device, 0xA6 );
 	// set Clocks
@@ -135,7 +137,7 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device SH1106 = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff, .SetContrast = SetContrast,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update, .Init = Init,
 	.Depth = 1,
 #if !defined SHADOW_BUFFER && defined USE_IRAM	
diff --git a/components/display/SSD1306.c b/components/display/SSD1306.c
index 90eb5afe..eb85e6f3 100644
--- a/components/display/SSD1306.c
+++ b/components/display/SSD1306.c
@@ -85,8 +85,11 @@ static void Update( struct GDS_Device* Device ) {
 #endif	
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { Device->WriteCommand( Device, On ? 0xA1 : 0xA0 ); }
-static void SetVFlip( struct GDS_Device *Device, bool On ) { Device->WriteCommand( Device, On ? 0xC8 : 0xC0 ); }
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { 
+	Device->WriteCommand( Device, HFlip ? 0xA1 : 0xA0 );
+	Device->WriteCommand( Device, VFlip ? 0xC8 : 0xC0 );
+}
+	
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAF ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAE ); }
 
@@ -129,8 +132,7 @@ static bool Init( struct GDS_Device* Device ) {
     Device->WriteCommand( Device, 0x40 + 0x00 );
 	Device->SetContrast( Device, 0x7F );
 	// set flip modes
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	Device->SetLayout( Device, false, false, false);
 	// no Display Inversion
     Device->WriteCommand( Device, 0xA6 );
 	// set Clocks
@@ -150,7 +152,7 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device SSD1306 = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff, .SetContrast = SetContrast,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update, .Init = Init,
 	.Mode = GDS_MONO, .Depth = 1,
 #if !defined SHADOW_BUFFER && defined USE_IRAM	
diff --git a/components/display/SSD1322.c b/components/display/SSD1322.c
index e2290604..b7d33bb6 100644
--- a/components/display/SSD1322.c
+++ b/components/display/SSD1322.c
@@ -96,22 +96,15 @@ static void Update( struct GDS_Device* Device ) {
 #endif	
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { 
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { 
 	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->ReMap = On ? (Private->ReMap & ~(1 << 1)) : (Private->ReMap | (1 << 1));
+	Private->ReMap = HFlip ? (Private->ReMap & ~(1 << 1)) : (Private->ReMap | (1 << 1));
+	Private->ReMap = VFlip ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
 	Device->WriteCommand( Device, 0xA0 );
 	Device->WriteData( Device, &Private->ReMap, 1 );
 	WriteDataByte( Device, 0x11 );		
 }	
 
-static void SetVFlip( struct GDS_Device *Device, bool On ) { 
-	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->ReMap = On ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
-	Device->WriteCommand( Device, 0xA0 );
-	Device->WriteData( Device, &Private->ReMap, 1 );
-	WriteDataByte( Device, 0x11 );		
-}	
-	
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAF ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAE ); }
 
@@ -152,8 +145,7 @@ static bool Init( struct GDS_Device* Device ) {
 	
 	// set flip modes
 	Private->ReMap = 0;
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	Device->SetLayout( Device, false, false, false);
 	
 	// set Clocks
     Device->WriteCommand( Device, 0xB3 );
@@ -187,7 +179,7 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device SSD1322 = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff, .SetContrast = SetContrast,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update, .Init = Init,
 	.Mode = GDS_GRAYSCALE, .Depth = 4,
 };	
diff --git a/components/display/SSD132x.c b/components/display/SSD132x.c
index 021e03a3..bec7186d 100644
--- a/components/display/SSD132x.c
+++ b/components/display/SSD132x.c
@@ -222,22 +222,19 @@ static void DrawBitmapCBR(struct GDS_Device* Device, uint8_t *Data, int Width, i
 	}
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { 
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { 
 	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	if (Private->Model == SSD1326) Private->ReMap = On ? (Private->ReMap | ((1 << 0) | (1 << 2))) : (Private->ReMap & ~((1 << 0) | (1 << 2)));
-	else Private->ReMap = On ? (Private->ReMap | ((1 << 0) | (1 << 1))) : (Private->ReMap & ~((1 << 0) | (1 << 1)));
+	if (Private->Model == SSD1326) {
+		Private->ReMap = HFlip ? (Private->ReMap | ((1 << 0) | (1 << 2))) : (Private->ReMap & ~((1 << 0) | (1 << 2)));
+		Private->ReMap = HFlip ? (Private->ReMap | (1 << 1)) : (Private->ReMap & ~(1 << 1));		
+	} else {
+		Private->ReMap = VFlip ? (Private->ReMap | ((1 << 0) | (1 << 1))) : (Private->ReMap & ~((1 << 0) | (1 << 1)));
+		Private->ReMap = VFlip ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
+	}	
 	Device->WriteCommand( Device, 0xA0 );
 	Device->WriteCommand( Device, Private->ReMap );
 }	
 
-static void SetVFlip( struct GDS_Device *Device, bool On ) { 
-	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	if (Private->Model == SSD1326) Private->ReMap = On ? (Private->ReMap | (1 << 1)) : (Private->ReMap & ~(1 << 1));
-	else Private->ReMap = On ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
-	Device->WriteCommand( Device, 0xA0 );
-	Device->WriteCommand( Device, Private->ReMap );
-}	
-	
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAF ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAE ); }
 
@@ -291,8 +288,7 @@ static bool Init( struct GDS_Device* Device ) {
 	Device->WriteCommand( Device, 0x00 );
 	Device->SetContrast( Device, 0x7F );
 	// set flip modes
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	Device->SetLayout( Device, false, false, false );
 	// no Display Inversion
     Device->WriteCommand( Device, 0xA6 );
 	// set Clocks
@@ -316,7 +312,7 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device SSD132x = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff, .SetContrast = SetContrast,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update4, .Init = Init,
 	.Mode = GDS_GRAYSCALE, .Depth = 4,
 };	
diff --git a/components/display/SSD1351.c b/components/display/SSD1351.c
index a48c7d6c..a7f0440d 100644
--- a/components/display/SSD1351.c
+++ b/components/display/SSD1351.c
@@ -164,34 +164,31 @@ static void Update24( struct GDS_Device* Device ) {
 #else
 	// always update by full lines
 	SetColumnAddress( Device, 0, Device->Width - 1);
-	Device->WriteCommand(Device, ENABLE_WRITE);
 	
-	for (int r = 0; r < Device->Height; r += Private->PageSize) {
-		SetRowAddress( Device, r, r + Private->PageSize - 1 );
+	for (int r = 0; r < Device->Height; r += min(Private->PageSize, Device->Height - r)) {
+		int Height = min(Private->PageSize, Device->Height - r);
+		
+		SetRowAddress( Device, r, r + Height - 1 );
+		Device->WriteCommand(Device, ENABLE_WRITE);
+		
 		if (Private->iRAM) {
-			memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 3, Private->PageSize * Device->Width * 3 );
-			Device->WriteData( Device, Private->iRAM, Private->PageSize * Device->Width * 3 );
+			memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
+			Device->WriteData( Device, Private->iRAM, Height * Device->Width * 3 );
 		} else	{
-			Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 3, Private->PageSize * Device->Width * 3 );
+			Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
 		}	
 	}	
 #endif	
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { 
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { 
 	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->ReMap = On ? (Private->ReMap & ~(1 << 1)) : (Private->ReMap | (1 << 1));
+	Private->ReMap = HFlip ? (Private->ReMap & ~(1 << 1)) : (Private->ReMap | (1 << 1));
+	Private->ReMap = VFlip ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
 	Device->WriteCommand( Device, 0xA0 );
 	WriteByte( Device, Private->ReMap );
 }	
 
-static void SetVFlip( struct GDS_Device *Device, bool On ) { 
-	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->ReMap = On ? (Private->ReMap | (1 << 4)) : (Private->ReMap & ~(1 << 4));
-	Device->WriteCommand( Device, 0xA0 );
-	WriteByte( Device, Private->ReMap );
-}	
-	
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAF ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0xAE ); }
 
@@ -242,8 +239,7 @@ static bool Init( struct GDS_Device* Device ) {
 	
 	// set flip modes & contrast
 	Device->SetContrast( Device, 0x7F );
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	Device->SetLayout( Device, false, false, false );
 	
 	// set Adressing Mode Horizontal
 	Private->ReMap |= (0 << 2);
@@ -265,7 +261,7 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device SSD1351 = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff, .SetContrast = SetContrast,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update16, .Init = Init,
 	.Mode = GDS_RGB565, .Depth = 16,
 };	
diff --git a/components/display/ST77xx.c b/components/display/ST77xx.c
index 0a4a79a4..8c21dbf5 100644
--- a/components/display/ST77xx.c
+++ b/components/display/ST77xx.c
@@ -29,6 +29,9 @@ enum { ST7735, ST7789 };
 
 struct PrivateSpace {
 	uint8_t *iRAM, *Shadowbuffer;
+	struct {
+		uint16_t Height, Width;
+	} Offset;
 	uint8_t MADCtl, PageSize;
 	uint8_t Model;
 };
@@ -75,8 +78,8 @@ static void Update16( struct GDS_Device* Device ) {
 		
 		FirstCol *= 2;
 		LastCol = LastCol * 2 + 1;
-		SetRowAddress( Device, FirstRow, LastRow );
-		SetColumnAddress( Device, FirstCol, LastCol );
+		SetRowAddress( Device, FirstRow + Private->Offset.Height, LastRow + Private->Offset.Height);
+		SetColumnAddress( Device, FirstCol + Private->Offset.Width, LastCol + Private->Offset.Width );
 		Device->WriteCommand( Device, ENABLE_WRITE );
 			
 		int ChunkSize = (LastCol - FirstCol + 1) * 2;
@@ -100,12 +103,12 @@ static void Update16( struct GDS_Device* Device ) {
 	}	
 #else
 	// always update by full lines
-	SetColumnAddress( Device, 0, Device->Width - 1);
+	SetColumnAddress( Device, Private->Offset.Width, Device->Width - 1);
 	
 	for (int r = 0; r < Device->Height; r += min(Private->PageSize, Device->Height - r)) {
 		int Height = min(Private->PageSize, Device->Height - r);
 		
-		SetRowAddress( Device, r, r + Height - 1 );
+		SetRowAddress( Device, Private->Offset.Height + r, Private->Offset.Height + r + Height - 1 );
 		Device->WriteCommand(Device, ENABLE_WRITE);
 		
 		if (Private->iRAM) {
@@ -142,8 +145,8 @@ static void Update24( struct GDS_Device* Device ) {
 		
 		FirstCol = (FirstCol * 2) / 3;
 		LastCol = (LastCol * 2 + 1) / 3; 
-		SetRowAddress( Device, FirstRow, LastRow );
-		SetColumnAddress( Device, FirstCol, LastCol );
+		SetRowAddress( Device, FirstRow + Private->Offset.Height, LastRow + Private->Offset.Height);
+		SetColumnAddress( Device, FirstCol + Private->Offset.Width, LastCol + Private->Offset.Width );
 		Device->WriteCommand( Device, ENABLE_WRITE );
 			
 		int ChunkSize = (LastCol - FirstCol + 1) * 3;
@@ -167,41 +170,55 @@ static void Update24( struct GDS_Device* Device ) {
 	}	
 #else
 	// always update by full lines
-	SetColumnAddress( Device, 0, Device->Width - 1);
-	Device->WriteCommand(Device, ENABLE_WRITE);
+	SetColumnAddress( Device, Private->Offset.Width, Device->Width - 1);
 	
-	for (int r = 0; r < Device->Height; r += Private->PageSize) {
-		SetRowAddress( Device, r, r + Private->PageSize - 1 );
+	for (int r = 0; r < Device->Height; r += min(Private->PageSize, Device->Height - r)) {
+		int Height = min(Private->PageSize, Device->Height - r);
+		
+		SetRowAddress( Device, Private->Offset.Height + r, Private->Offset.Height + r + Height - 1 );
+		Device->WriteCommand(Device, ENABLE_WRITE);
+		
 		if (Private->iRAM) {
-			memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 3, Private->PageSize * Device->Width * 3 );
-			Device->WriteData( Device, Private->iRAM, Private->PageSize * Device->Width * 3 );
+			memcpy(Private->iRAM, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
+			Device->WriteData( Device, Private->iRAM, Height * Device->Width * 3 );
 		} else	{
-			Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 3, Private->PageSize * Device->Width * 3 );
+			Device->WriteData( Device, Device->Framebuffer + r * Device->Width * 3, Height * Device->Width * 3 );
 		}	
 	}	
 #endif	
 }
 
-static void SetHFlip( struct GDS_Device* Device, bool On ) { 
+static void SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { 
 	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->MADCtl = On ? (Private->MADCtl & ~(1 << 7)) : (Private->MADCtl | (1 << 7));
+	
+	Private->MADCtl = HFlip ? (Private->MADCtl | (1 << 7)) : (Private->MADCtl & ~(1 << 7));
+	Private->MADCtl = VFlip ? (Private->MADCtl | (1 << 6)) : (Private->MADCtl & ~(1 << 6));
+	Private->MADCtl = Rotate ? (Private->MADCtl | (1 << 5)) : (Private->MADCtl & ~(1 << 5));
+	
 	Device->WriteCommand( Device, 0x36 );
 	WriteByte( Device, Private->MADCtl );
+	
+	if (Private->Model == ST7789) {
+		if (Rotate) Private->Offset.Width = HFlip ? 320 - Device->Width : 0;
+		else Private->Offset.Height = HFlip ? 320 - Device->Height : 0;
+	}
+
+#ifdef SHADOW_BUFFER
+	// force a full refresh (almost ...)
+	memset(Private->Shadowbuffer, 0xAA, Device->FramebufferSize);
+#endif	
 }	
 
-static void SetVFlip( struct GDS_Device *Device, bool On ) { 
-	struct PrivateSpace *Private = (struct PrivateSpace*) Device->Private;
-	Private->MADCtl = On ? (Private->MADCtl | (1 << 6)) : (Private->MADCtl & ~(1 << 6));
-	Device->WriteCommand( Device, 0x36 );
-	WriteByte( Device, Private->MADCtl );
-}	
-	
 static void DisplayOn( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0x29 ); }
 static void DisplayOff( struct GDS_Device* Device ) { Device->WriteCommand( Device, 0x28 ); }
 
 static void SetContrast( struct GDS_Device* Device, uint8_t Contrast ) {
 	Device->WriteCommand( Device, 0x51 );
 	WriteByte( Device, Contrast );
+	
+	Device->SetContrast = NULL;
+	GDS_SetContrast( Device, Contrast );
+	Device->SetContrast = SetContrast;
 }
 
 static bool Init( struct GDS_Device* Device ) {
@@ -209,7 +226,7 @@ static bool Init( struct GDS_Device* Device ) {
 	int Depth = (Device->Depth + 8 - 1) / 8;
 	
 	Private->PageSize = min(8, PAGE_BLOCK / (Device->Width * Depth));
-	
+
 #ifdef SHADOW_BUFFER	
 	Private->Shadowbuffer = malloc( Device->FramebufferSize );	
 	memset(Private->Shadowbuffer, 0xFF, Device->FramebufferSize);
@@ -224,21 +241,21 @@ static bool Init( struct GDS_Device* Device ) {
 	Device->WriteCommand( Device, 0x11 );
 		
 	// need BGR & Address Mode
-	Private->MADCtl = (1 << 3) | ((Device->Width > Device->Height ? 1 : 0) << 5);
+	Private->MADCtl = 1 << 3;
 	Device->WriteCommand( Device, 0x36 );
 	WriteByte( Device, Private->MADCtl );		
 		
 	// set flip modes & contrast
-	GDS_SetContrast( Device, 0x7F );
-	Device->SetVFlip( Device, false );
-	Device->SetHFlip( Device, false );
+	GDS_SetContrast( Device, 0x7f );
+	Device->SetLayout( Device, false, false, false );
 	
 	// set screen depth (16/18)
 	Device->WriteCommand( Device, 0x3A );
-	WriteByte( Device, Device->Depth == 24 ? 0x06 : 0x05 );
+	if (Private->Model == ST7789) WriteByte( Device, Device->Depth == 24 ? 0x066 : 0x55 );
+	else WriteByte( Device, Device->Depth == 24 ? 0x06 : 0x05 );
 	
 	// no Display Inversion
-    Device->WriteCommand( Device, 0x20 );	
+    Device->WriteCommand( Device, Private->Model == ST7735 ? 0x20 : 0x21 );	
 		
 	// gone with the wind
 	Device->DisplayOn( Device );
@@ -249,15 +266,15 @@ static bool Init( struct GDS_Device* Device ) {
 
 static const struct GDS_Device ST77xx = {
 	.DisplayOn = DisplayOn, .DisplayOff = DisplayOff,
-	.SetVFlip = SetVFlip, .SetHFlip = SetHFlip,
+	.SetLayout = SetLayout,
 	.Update = Update16, .Init = Init,
 	.Mode = GDS_RGB565, .Depth = 16,
-};	
+};		
 
 struct GDS_Device* ST77xx_Detect(char *Driver, struct GDS_Device* Device) {
 	uint8_t Model;
 	int Depth;
-	
+		
 	if (strcasestr(Driver, "ST7735")) Model = ST7735;
 	else if (strcasestr(Driver, "ST7789")) Model = ST7789;
 	else return NULL;
@@ -275,6 +292,6 @@ struct GDS_Device* ST77xx_Detect(char *Driver, struct GDS_Device* Device) {
 	} 	
 	
 	if (Model == ST7789) Device->SetContrast = SetContrast;
-	
+
 	return Device;
 }
\ No newline at end of file
diff --git a/components/display/core/gds.c b/components/display/core/gds.c
index e2bccfa0..5c739b72 100644
--- a/components/display/core/gds.c
+++ b/components/display/core/gds.c
@@ -236,8 +236,7 @@ void GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast ) {
 	}
 }
 	
-void GDS_SetHFlip( struct GDS_Device* Device, bool On ) { if (Device->SetHFlip) Device->SetHFlip( Device, On ); }
-void GDS_SetVFlip( struct GDS_Device* Device, bool On ) { if (Device->SetVFlip) Device->SetVFlip( Device, On ); }
+void GDS_SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate ) { if (Device->SetLayout) Device->SetLayout( Device, HFlip, VFlip, Rotate ); }
 void GDS_SetDirty( struct GDS_Device* Device ) { Device->Dirty = true; }
 int	GDS_GetWidth( struct GDS_Device* Device ) { return Device->Width; }
 int	GDS_GetHeight( struct GDS_Device* Device ) { return Device->Height; }
diff --git a/components/display/core/gds.h b/components/display/core/gds.h
index 952b6609..d79ade04 100644
--- a/components/display/core/gds.h
+++ b/components/display/core/gds.h
@@ -35,8 +35,7 @@ void 	GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast );
 void 	GDS_DisplayOn( struct GDS_Device* Device );
 void 	GDS_DisplayOff( struct GDS_Device* Device ); 
 void 	GDS_Update( struct GDS_Device* Device );
-void 	GDS_SetHFlip( struct GDS_Device* Device, bool On );
-void 	GDS_SetVFlip( struct GDS_Device* Device, bool On );
+void 	GDS_SetLayout( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate );
 void 	GDS_SetDirty( struct GDS_Device* Device );
 int 	GDS_GetWidth( struct GDS_Device* Device );
 int 	GDS_GetHeight( struct GDS_Device* Device );
diff --git a/components/display/core/gds_private.h b/components/display/core/gds_private.h
index dcbd8191..96d77c88 100644
--- a/components/display/core/gds_private.h
+++ b/components/display/core/gds_private.h
@@ -101,7 +101,7 @@ struct GDS_Device {
 	
 	uint8_t	Alloc;	
 	uint8_t* Framebuffer;
-    uint16_t FramebufferSize;
+    uint32_t FramebufferSize;
 	bool Dirty;
 
 	// default fonts when using direct draw	
@@ -117,8 +117,7 @@ struct GDS_Device {
 	void (*SetContrast)( struct GDS_Device* Device, uint8_t Contrast );
 	void (*DisplayOn)( struct GDS_Device* Device );
 	void (*DisplayOff)( struct GDS_Device* Device );
-	void (*SetHFlip)( struct GDS_Device* Device, bool On );
-	void (*SetVFlip)( struct GDS_Device* Device, bool On );
+	void (*SetLayout)( struct GDS_Device* Device, bool HFlip, bool VFlip, bool Rotate );
 	// must provide for depth other than 1 (vertical) and 4 (may provide for optimization)
 	void (*DrawPixelFast)( struct GDS_Device* Device, int X, int Y, int Color );
 	void (*DrawBitmapCBR)(struct GDS_Device* Device, uint8_t *Data, int Width, int Height, int Color );
@@ -130,8 +129,8 @@ struct GDS_Device {
     WriteCommandProc WriteCommand;
     WriteDataProc WriteData;
 
-	// 16 bytes for whatever the driver wants (should be aligned as it's 32 bits)	
-	uint32_t Private[4];
+	// 32 bytes for whatever the driver wants (should be aligned as it's 32 bits)	
+	uint32_t Private[8];
 };
 
 bool GDS_Reset( struct GDS_Device* Device );
diff --git a/components/display/display.c b/components/display/display.c
index 3a9a0569..3fb30081 100644
--- a/components/display/display.c
+++ b/components/display/display.c
@@ -59,20 +59,15 @@ static const char *known_drivers[] = {"SH1106",
 static void displayer_task(void *args);
 
 struct GDS_Device *display;   
-extern GDS_DetectFunc SSD1306_Detect, SSD132x_Detect, SH1106_Detect, SSD1675_Detect, SSD1322_Detect, SSD1351_Detect, ST77xx_Detect, ILI9341_Detect;
-GDS_DetectFunc *drivers[] = { SH1106_Detect, SSD1306_Detect, SSD132x_Detect, SSD1675_Detect, SSD1322_Detect, SSD1351_Detect, ST77xx_Detect, ILI9341_Detect, NULL };
+extern GDS_DetectFunc SSD1306_Detect, SSD132x_Detect, SH1106_Detect, SSD1675_Detect, SSD1322_Detect, SSD1351_Detect, ST77xx_Detect;
+GDS_DetectFunc *drivers[] = { SH1106_Detect, SSD1306_Detect, SSD132x_Detect, SSD1675_Detect, SSD1322_Detect, SSD1351_Detect, ST77xx_Detect, NULL };
 
 /****************************************************************************************
  * 
  */
 void display_init(char *welcome) {
 	bool init = false;
-	char *config = config_alloc_get(NVS_TYPE_STR, "display_config");
-
-	if (!config) {
-		ESP_LOGI(TAG, "no display");
-		return;
-	}	
+	char *config = config_alloc_get_str("display_config", CONFIG_DISPLAY_CONFIG, "N/A");
 	
 	int width = -1, height = -1, backlight_pin = -1;
 	char *p, *drivername = strstr(config, "driver");
@@ -130,8 +125,7 @@ void display_init(char *welcome) {
 		static DRAM_ATTR StaticTask_t xTaskBuffer __attribute__ ((aligned (4)));
 		static EXT_RAM_ATTR StackType_t xStack[DISPLAYER_STACK_SIZE] __attribute__ ((aligned (4)));
 		
-		GDS_SetHFlip(display, strcasestr(config, "HFlip") ? true : false);
-		GDS_SetVFlip(display, strcasestr(config, "VFlip") ? true : false);
+		GDS_SetLayout( display, strcasestr(config, "HFlip"), strcasestr(config, "VFlip"), strcasestr(config, "rotate"));
 		GDS_SetFont(display, &Font_droid_sans_fallback_15x17 );
 		GDS_TextPos(display, GDS_FONT_MEDIUM, GDS_TEXT_CENTERED, GDS_TEXT_CLEAR | GDS_TEXT_UPDATE, welcome);
 
diff --git a/components/services/accessors.c b/components/services/accessors.c
index 25813880..be0a66c2 100644
--- a/components/services/accessors.c
+++ b/components/services/accessors.c
@@ -115,7 +115,7 @@ const spi_bus_config_t * config_spi_get(spi_host_device_t * spi_host) {
         .quadhd_io_num = -1
     };
 
-	nvs_item = config_alloc_get(NVS_TYPE_STR, "spi_config");
+	nvs_item = config_alloc_get_str("spi_config", CONFIG_SPI_CONFIG, NULL);
 	if (nvs_item) {
 		if ((p = strcasestr(nvs_item, "data")) != NULL) spi.mosi_io_num = atoi(strchr(p, '=') + 1);
 		if ((p = strcasestr(nvs_item, "clk")) != NULL) spi.sclk_io_num = atoi(strchr(p, '=') + 1);
diff --git a/components/services/led.c b/components/services/led.c
index 7d247990..1a66fdb2 100644
--- a/components/services/led.c
+++ b/components/services/led.c
@@ -168,7 +168,7 @@ int led_allocate(void) {
  */
 bool led_config(int idx, gpio_num_t gpio, int onstate, int pwm) {
 	if (gpio < 0) {
-		ESP_LOGW(TAG,"LED GPIO not configured");
+		ESP_LOGW(TAG,"LED GPIO -1 ignored");
 		return false;
 	}
 	
@@ -231,7 +231,7 @@ void led_svc_init(void) {
 #ifndef CONFIG_LED_LOCKED
 	parse_set_GPIO(set_led_gpio);
 #endif
-	ESP_LOGI(TAG,"Configuring LEDs green:%d (active:%d %d%%), red:%d (active:%d %d%%)", green.gpio, green.active, green.pwm, red.gpio, red.active, red.pwm);
+	ESP_LOGI(TAG,"Configuring LEDs green:%d (active:%d %d%%), red:%d (active:%d %d%%)", green.gpio, green.active, green.pwm, green.gpio, green.active, green.pwm );
 	
 	char *nvs_item = config_alloc_get(NVS_TYPE_STR, "led_brightness"), *p; 
 	if (nvs_item) {
diff --git a/components/squeezelite/a1s/ac101.c b/components/squeezelite/ac101/ac101.c
similarity index 92%
rename from components/squeezelite/a1s/ac101.c
rename to components/squeezelite/ac101/ac101.c
index a7678eb1..eba88654 100644
--- a/components/squeezelite/a1s/ac101.c
+++ b/components/squeezelite/ac101/ac101.c
@@ -33,7 +33,7 @@
 #include "adac.h"
 #include "ac101.h"
 
-const static char TAG[] = "AC101";
+static const char TAG[] = "AC101";
 
 #define SPKOUT_EN ((1 << 9) | (1 << 11) | (1 << 7) | (1 << 5))
 #define EAROUT_EN ((1 << 11) | (1 << 12) | (1 << 13))
@@ -48,14 +48,14 @@ const static char TAG[] = "AC101";
         return b;\
     }
 	
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *config);
+static bool init(char *config, int i2c_port_num);
 static void deinit(void);
 static void speaker(bool active);
 static void headset(bool active);
-static void volume(unsigned left, unsigned right);
+static bool volume(unsigned left, unsigned right);
 static void power(adac_power_e mode);
 
-struct adac_s dac_a1s = { init, deinit, power, speaker, headset, volume };
+const struct adac_s dac_ac101 = { "AC101", init, deinit, power, speaker, headset, volume };
 
 static esp_err_t i2c_write_reg(uint8_t reg, uint16_t val);
 static uint16_t i2c_read_reg(uint8_t reg);
@@ -70,21 +70,24 @@ static int i2c_port;
 /****************************************************************************************
  * init
  */
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {	 
+static bool init(char *config, int i2c_port_num) {	 
 	esp_err_t res = ESP_OK;
+	char *p;
 	
-	i2c_port = i2c_port_num;
-
 	// configure i2c
 	i2c_config_t i2c_config = {
 			.mode = I2C_MODE_MASTER,
-			.sda_io_num = 33,
+			.sda_io_num = -1,
 			.sda_pullup_en = GPIO_PULLUP_ENABLE,
-			.scl_io_num = 32,
+			.scl_io_num = -1,
 			.scl_pullup_en = GPIO_PULLUP_ENABLE,
 			.master.clk_speed = 250000,
 		};
-		
+	
+	if ((p = strcasestr(config, "sda")) != NULL) i2c_config.sda_io_num = atoi(strchr(p, '=') + 1);
+	if ((p = strcasestr(config, "scl")) != NULL) i2c_config.scl_io_num = atoi(strchr(p, '=') + 1);
+	
+	i2c_port = i2c_port_num;
 	i2c_param_config(i2c_port, &i2c_config);
 	i2c_driver_install(i2c_port, I2C_MODE_MASTER, false, false, false);
 	
@@ -96,8 +99,6 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
 		return 0;		
 	}
 	
-	ESP_LOGI(TAG, "AC101 DAC using I2C sda:%u, scl:%u", i2c_config.sda_io_num, i2c_config.scl_io_num);
-	
 	res = i2c_write_reg(CHIP_AUDIO_RS, 0x123);
 	// huh?
 	vTaskDelay(100 / portTICK_PERIOD_MS); 
@@ -140,13 +141,6 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
 	i2c_write_reg(OMIXER_SR, 		BIN(0000,0101,0000,1010));	// source=DAC(R/L) and LINEIN(R/L)
 #endif	
 	
-	// configure I2S pins & install driver	
-	i2s_pin_config_t i2s_pin_config = (i2s_pin_config_t) { 	.bck_io_num = CONFIG_I2S_BCK_IO, .ws_io_num = CONFIG_I2S_WS_IO, 
-															.data_out_num = CONFIG_I2S_DO_IO, .data_in_num = CONFIG_I2S_DI_IO
-								};
-	res |= i2s_driver_install(i2s_num, i2s_config, 0, NULL);
-	res |= i2s_set_pin(i2s_num, &i2s_pin_config);
-	
 	// enable earphone & speaker
 	i2c_write_reg(SPKOUT_CTRL, 0x0220);
 	i2c_write_reg(HPOUT_CTRL, 0xf801);
@@ -155,7 +149,7 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
 	ac101_set_spk_volume(100);
 	ac101_set_earph_volume(100);
 	
-	ESP_LOGI(TAG, "DAC using I2S bck:%d, ws:%d, do:%d", i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, i2s_pin_config.data_out_num);
+	ESP_LOGI(TAG, "AC101 uses I2C sda:%d, scl:%d", i2c_config.sda_io_num, i2c_config.scl_io_num);
 
 	return (res == ESP_OK);
 }	
@@ -170,8 +164,9 @@ static void deinit(void)	{
 /****************************************************************************************
  * change volume
  */
-static void volume(unsigned left, unsigned right) {
+static bool volume(unsigned left, unsigned right) {
 	// nothing at that point, volume is handled by backend
+	return false;
 } 
 
 /****************************************************************************************
diff --git a/components/squeezelite/a1s/ac101.h b/components/squeezelite/ac101/ac101.h
similarity index 100%
rename from components/squeezelite/a1s/ac101.h
rename to components/squeezelite/ac101/ac101.h
diff --git a/components/squeezelite/adac.h b/components/squeezelite/adac.h
index 1b1a2668..3e337c72 100644
--- a/components/squeezelite/adac.h
+++ b/components/squeezelite/adac.h
@@ -15,14 +15,15 @@
 typedef enum { ADAC_ON = 0, ADAC_STANDBY, ADAC_OFF } adac_power_e;
 
 struct adac_s {
-	bool (*init)(int i2c_port_num, int i2s_num, i2s_config_t *config);
+	char *model;
+	bool (*init)(char *config, int i2c_port_num);
 	void (*deinit)(void);
 	void (*power)(adac_power_e mode);
 	void (*speaker)(bool active);
 	void (*headset)(bool active);
-	void (*volume)(unsigned left, unsigned right);
+	bool (*volume)(unsigned left, unsigned right);
 };
 
-extern struct adac_s dac_tas57xx;
-extern struct adac_s dac_a1s;
-extern struct adac_s dac_external;
\ No newline at end of file
+extern const struct adac_s dac_tas57xx;
+extern const struct adac_s dac_ac101;
+extern const struct adac_s dac_external;
diff --git a/components/squeezelite/component.mk b/components/squeezelite/component.mk
index c6c4d5f1..718baf19 100644
--- a/components/squeezelite/component.mk
+++ b/components/squeezelite/component.mk
@@ -20,7 +20,7 @@ CFLAGS += -O3 -DLINKALL -DLOOPBACK -DNO_FAAD -DRESAMPLE16 -DEMBEDDED -DTREMOR_ON
 
 #	-I$(COMPONENT_PATH)/../codecs/inc/faad2
 
-COMPONENT_SRCDIRS := . tas57xx a1s external
-COMPONENT_ADD_INCLUDEDIRS := . ./tas57xx ./a1s
+COMPONENT_SRCDIRS := . tas57xx ac101 external
+COMPONENT_ADD_INCLUDEDIRS := . ./tas57xx ./ac101
 COMPONENT_EMBED_FILES := vu.data
 
diff --git a/components/squeezelite/decode_external.c b/components/squeezelite/decode_external.c
index 20ef9a96..e0ea344d 100644
--- a/components/squeezelite/decode_external.c
+++ b/components/squeezelite/decode_external.c
@@ -28,7 +28,6 @@ extern struct buffer *outputbuf;
 // this is the only system-wide loglevel variable
 extern log_level loglevel;
 
-
 static bool enable_bt_sink;
 static bool enable_airplay;
 
diff --git a/components/squeezelite/display.c b/components/squeezelite/display.c
index 546f57d2..d4cbea46 100644
--- a/components/squeezelite/display.c
+++ b/components/squeezelite/display.c
@@ -573,8 +573,9 @@ void draw_VU(struct GDS_Device * display, const uint8_t *data, int level, int x,
 	
 	// adjust to current display window
 	if (width > VU_WIDTH) {
+		if (rotate) y += (width - VU_WIDTH) / 2;		
+		else x += (width - VU_WIDTH) / 2;		
 		width = VU_WIDTH;
-		x += (width - VU_WIDTH) / 2;
 	} else {
 		data += (VU_WIDTH - width) / 2 * VU_HEIGHT;	
 	}	
diff --git a/components/squeezelite/external/dac_external.c b/components/squeezelite/external/dac_external.c
index 4f663b41..07907680 100644
--- a/components/squeezelite/external/dac_external.c
+++ b/components/squeezelite/external/dac_external.c
@@ -12,46 +12,163 @@
 #include <freertos/FreeRTOS.h>
 #include <freertos/task.h>
 #include <driver/i2s.h>
+#include "driver/i2c.h"
 #include "esp_log.h"
+#include "cJSON.h"
 #include "platform_config.h"
 #include "adac.h"
 
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *config);
-static void deinit(void) { };
-static void speaker(bool active) { };
-static void headset(bool active) { } ;
-static void volume(unsigned left, unsigned right) { };
-static void power(adac_power_e mode) { };
+static const char TAG[] = "DAC external";
 
-struct adac_s dac_external = { init, deinit, power, speaker, headset, volume };
+static void deinit(void) { }
+static void speaker(bool active) { }
+static void headset(bool active) { } 
+static bool volume(unsigned left, unsigned right) { return false; }
+static void power(adac_power_e mode);
+static bool init(char *config, int i2c_port_num);
 
-static char TAG[] = "DAC external";
+static bool i2c_json_execute(char *set);
+static esp_err_t i2c_write_reg(uint8_t reg, uint8_t val);
+static uint8_t i2c_read_reg(uint8_t reg);
 
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *config) { 
-	i2s_pin_config_t i2s_pin_config = (i2s_pin_config_t) { 	.bck_io_num = CONFIG_I2S_BCK_IO, .ws_io_num = CONFIG_I2S_WS_IO, 
-															.data_out_num = CONFIG_I2S_DO_IO, .data_in_num = CONFIG_I2S_DI_IO };
-	char *nvs_item = config_alloc_get(NVS_TYPE_STR, "dac_config");
+const struct adac_s dac_external = { "i2s", init, deinit, power, speaker, headset, volume };
+static int i2c_port, i2c_addr;
+static cJSON *i2c_json;
+
+/****************************************************************************************
+ * init
+ */
+static bool init(char *config, int i2c_port_num)	{	 
+	char *p;	
+	i2c_port = i2c_port_num;
 	
-	if (nvs_item) {
-		char *p;
-		if ((p = strcasestr(nvs_item, "bck")) != NULL) i2s_pin_config.bck_io_num = atoi(strchr(p, '=') + 1);
-		if ((p = strcasestr(nvs_item, "ws")) != NULL) i2s_pin_config.ws_io_num = atoi(strchr(p, '=') + 1);
-		if ((p = strcasestr(nvs_item, "do")) != NULL) i2s_pin_config.data_out_num = atoi(strchr(p, '=') + 1);
-		free(nvs_item);
-	} 
+	// configure i2c
+	i2c_config_t i2c_config = {
+			.mode = I2C_MODE_MASTER,
+			.sda_io_num = -1,
+			.sda_pullup_en = GPIO_PULLUP_ENABLE,
+			.scl_io_num = -1,
+			.scl_pullup_en = GPIO_PULLUP_ENABLE,
+			.master.clk_speed = 250000,
+		};
+
+	if ((p = strcasestr(config, "i2c")) != NULL) i2c_addr = atoi(strchr(p, '=') + 1);
+	if ((p = strcasestr(config, "sda")) != NULL) i2c_config.sda_io_num = atoi(strchr(p, '=') + 1);
+	if ((p = strcasestr(config, "scl")) != NULL) i2c_config.scl_io_num = atoi(strchr(p, '=') + 1);
+
+	p = config_alloc_get_str("dac_controlset", CONFIG_DAC_CONTROLSET, NULL);
+	i2c_json = cJSON_Parse(p);
 	
-	if (i2s_pin_config.bck_io_num != -1 && i2s_pin_config.ws_io_num != -1 && i2s_pin_config.data_out_num != -1) {
-		i2s_driver_install(i2s_num, config, 0, NULL);
-		i2s_set_pin(i2s_num, &i2s_pin_config);
-
-		ESP_LOGI(TAG, "External DAC using I2S bck:%u, ws:%u, do:%u", i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, i2s_pin_config.data_out_num);
-
+	if (!i2c_addr || !i2c_json || i2c_config.sda_io_num == -1 || i2c_config.scl_io_num == -1) {
+		if (p) free(p);
+		ESP_LOGW(TAG, "No i2c controlset found");
 		return true;
-	} else {
-		ESP_LOGI(TAG, "Cannot initialize I2S for DAC bck:%d ws:%d do:%d", i2s_pin_config.bck_io_num, 
-																		   i2s_pin_config.ws_io_num, 
-																		   i2s_pin_config.data_out_num);
+	}	
+	
+	ESP_LOGI(TAG, "DAC uses I2C @%d with sda:%d, scl:%d", i2c_addr, i2c_config.sda_io_num, i2c_config.scl_io_num);
+	
+	// we have an I2C configured	
+	i2c_param_config(i2c_port, &i2c_config);
+	i2c_driver_install(i2c_port, I2C_MODE_MASTER, false, false, false);
+		
+	if (!i2c_json_execute("init")) {	
+		ESP_LOGE(TAG, "could not intialize DAC");
 		return false;
-	}
+	}	
+	
+	return true;
+}	
+
+/****************************************************************************************
+ * power
+ */
+static void power(adac_power_e mode) {
+	if (mode == ADAC_STANDBY || mode == ADAC_OFF) i2c_json_execute("poweroff");
+	else i2c_json_execute("poweron");
 }
 
+/****************************************************************************************
+ * 
+ */
+bool i2c_json_execute(char *set) {
+	cJSON *json_set = cJSON_GetObjectItemCaseSensitive(i2c_json, set);
+	cJSON *item;
+
+	if (!json_set) return true;
+	
+	cJSON_ArrayForEach(item, json_set)
+	{
+		cJSON *reg = cJSON_GetObjectItemCaseSensitive(item, "reg");
+		cJSON *val = cJSON_GetObjectItemCaseSensitive(item, "val");
+		cJSON *mode = cJSON_GetObjectItemCaseSensitive(item, "mode");
+
+		if (!reg || !val) continue;
+
+		if (!mode) {
+			i2c_write_reg(reg->valueint, val->valueint);
+		} else if (!strcasecmp(mode->valuestring, "or")) {
+			uint8_t data = i2c_read_reg(reg->valueint);
+			data |= (uint8_t) val->valueint;
+			i2c_write_reg(reg->valueint, data);
+		} else if (!strcasecmp(mode->valuestring, "and")) {
+			uint8_t data = i2c_read_reg(reg->valueint);
+			data &= (uint8_t) val->valueint;
+			i2c_write_reg(reg->valueint, data);
+        }
+	}
+	
+	return true;
+}	
+
+/****************************************************************************************
+ * 
+ */
+static esp_err_t i2c_write_reg(uint8_t reg, uint8_t val) {
+	esp_err_t ret;
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+	
+	i2c_master_write_byte(cmd, i2c_addr | I2C_MASTER_WRITE, I2C_MASTER_NACK);
+	i2c_master_write_byte(cmd, reg, I2C_MASTER_NACK);
+	i2c_master_write_byte(cmd, val, I2C_MASTER_NACK);
+	
+	i2c_master_stop(cmd);
+    ret = i2c_master_cmd_begin(i2c_port, cmd, 1000 / portTICK_RATE_MS);
+    i2c_cmd_link_delete(cmd);
+	
+	if (ret != ESP_OK) {
+		ESP_LOGW(TAG, "I2C write failed");
+	}
+	
+    return ret;
+}
+
+/****************************************************************************************
+ * 
+ */
+static uint8_t i2c_read_reg(uint8_t reg) {
+	esp_err_t ret;
+	uint8_t data = 0;
+	
+	i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    
+	i2c_master_write_byte(cmd, i2c_addr | I2C_MASTER_WRITE, I2C_MASTER_NACK);
+	i2c_master_write_byte(cmd, reg, I2C_MASTER_NACK);
+
+	i2c_master_start(cmd);			
+	i2c_master_write_byte(cmd, i2c_addr | I2C_MASTER_READ, I2C_MASTER_NACK);
+	i2c_master_read_byte(cmd, &data, I2C_MASTER_NACK);
+	
+    i2c_master_stop(cmd);
+	ret = i2c_master_cmd_begin(i2c_port, cmd, 1000 / portTICK_RATE_MS);
+	i2c_cmd_link_delete(cmd);
+	
+	if (ret != ESP_OK) {
+		ESP_LOGW(TAG, "I2C read failed");
+	}
+	
+	return data;
+}
+
+
diff --git a/components/squeezelite/output_i2s.c b/components/squeezelite/output_i2s.c
index 242eab9d..c7f9169a 100644
--- a/components/squeezelite/output_i2s.c
+++ b/components/squeezelite/output_i2s.c
@@ -77,8 +77,8 @@ extern struct buffer *streambuf;
 extern struct buffer *outputbuf;
 extern u8_t *silencebuf;
 
-// by default no DAC selected
-struct adac_s *adac = &dac_external;
+const struct adac_s *dac_set[] = { &dac_tas57xx, &dac_ac101, NULL };
+const struct adac_s *adac = &dac_external;
 
 static log_level loglevel;
 
@@ -93,7 +93,10 @@ static size_t dma_buf_frames;
 static pthread_t thread;
 static TaskHandle_t stats_task;
 static bool stats;
-static int amp_gpio = -1;
+static struct {
+	int gpio, active;
+} amp_control = { -1, 1 },
+  mute_control = { CONFIG_MUTE_GPIO, CONFIG_MUTE_GPIO_LEVEL };
 
 DECLARE_ALL_MIN_MAX;
 
@@ -129,14 +132,17 @@ static void jack_handler(bool inserted) {
  * amp GPIO
  */
 static void set_amp_gpio(int gpio, char *value) {
+	char *p;
+	
 	if (!strcasecmp(value, "amp")) {
-		amp_gpio = gpio;
+		amp_control.gpio = gpio;
+		if ((p = strchr(value, ':')) != NULL) amp_control.active = atoi(p + 1);
 		
-		gpio_pad_select_gpio(amp_gpio);
-		gpio_set_direction(amp_gpio, GPIO_MODE_OUTPUT);
-		gpio_set_level(amp_gpio, 0);
+		gpio_pad_select_gpio(amp_control.gpio);
+		gpio_set_direction(amp_control.gpio, GPIO_MODE_OUTPUT);
+		gpio_set_level(amp_control.gpio, !amp_control.active);
 		
-		LOG_INFO("setting amplifier GPIO %d", amp_gpio);
+		LOG_INFO("setting amplifier GPIO %d (active:%d)", amp_control.gpio, amp_control.active);
 	}	
 }	
 
@@ -146,7 +152,8 @@ static void set_amp_gpio(int gpio, char *value) {
 void output_init_i2s(log_level level, char *device, unsigned output_buf_size, char *params, unsigned rates[], unsigned rate_delay, unsigned idle) {
 	loglevel = level;
 	char *p;
-
+	esp_err_t res;
+	
 	p = config_alloc_get_default(NVS_TYPE_STR, "jack_mutes_amp", "n", 0);
 	jack_mutes_amp = (strcmp(p,"1") == 0 ||strcasecmp(p,"y") == 0);
 	free(p);
@@ -182,7 +189,14 @@ void output_init_i2s(log_level level, char *device, unsigned output_buf_size, ch
 	}
 		
 	running = true;
+	i2s_pin_config_t i2s_pin_config = {	.bck_io_num = -1, .ws_io_num = -1, .data_out_num = -1, .data_in_num = -1 }; 				
 
+	// get SPDIF configuration from NVS or compile
+	char *spdif_config = config_alloc_get_str("spdif_config", CONFIG_SPDIF_CONFIG, "bck=" STR(CONFIG_SPDIF_BCK_IO) 
+											  ",ws=" STR(CONFIG_SPDIF_WS_IO) ",do=" STR(CONFIG_SPDIF_DO_IO));
+
+	if ((p = strcasestr(spdif_config, "do")) != NULL) i2s_pin_config.data_out_num = atoi(strchr(p, '=') + 1);
+	
 	// common I2S initialization
 	i2s_config.mode = I2S_MODE_MASTER | I2S_MODE_TX;
 	i2s_config.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT;
@@ -191,21 +205,13 @@ void output_init_i2s(log_level level, char *device, unsigned output_buf_size, ch
 	i2s_config.tx_desc_auto_clear = true;		
 	i2s_config.use_apll = true;
 	i2s_config.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1; //Interrupt level 1
-
+	
 	if (strcasestr(device, "spdif")) {
 		spdif = true;	
-		i2s_pin_config_t i2s_pin_config = (i2s_pin_config_t) { .bck_io_num = CONFIG_SPDIF_BCK_IO, .ws_io_num = CONFIG_SPDIF_WS_IO, 
-															  .data_out_num = CONFIG_SPDIF_DO_IO, .data_in_num = -1 };
-#ifndef CONFIG_SPDIF_LOCKED															  
-		char *nvs_item = config_alloc_get(NVS_TYPE_STR, "spdif_config");
-		if (nvs_item) {
-			if ((p = strcasestr(nvs_item, "bck")) != NULL) i2s_pin_config.bck_io_num = atoi(strchr(p, '=') + 1);
-			if ((p = strcasestr(nvs_item, "ws")) != NULL) i2s_pin_config.ws_io_num = atoi(strchr(p, '=') + 1);
-			if ((p = strcasestr(nvs_item, "do")) != NULL) i2s_pin_config.data_out_num = atoi(strchr(p, '=') + 1);
-			free(nvs_item);
-		} 
-#endif		
-		
+
+		if ((p = strcasestr(spdif_config, "bck")) != NULL) i2s_pin_config.bck_io_num = atoi(strchr(p, '=') + 1);
+		if ((p = strcasestr(spdif_config, "ws")) != NULL) i2s_pin_config.ws_io_num = atoi(strchr(p, '=') + 1);
+			
 		if (i2s_pin_config.bck_io_num == -1 || i2s_pin_config.ws_io_num == -1 || i2s_pin_config.data_out_num == -1) {
 			LOG_WARN("Cannot initialize I2S for SPDIF bck:%d ws:%d do:%d", i2s_pin_config.bck_io_num, 
 																		   i2s_pin_config.ws_io_num, 
@@ -223,30 +229,64 @@ void output_init_i2s(log_level level, char *device, unsigned output_buf_size, ch
 		   audio frame. So the real depth is true frames is (LEN * COUNT / 2)
 		*/   
 		dma_buf_frames = DMA_BUF_COUNT * DMA_BUF_LEN / 2;	
-		i2s_driver_install(CONFIG_I2S_NUM, &i2s_config, 0, NULL);
-		i2s_set_pin(CONFIG_I2S_NUM, &i2s_pin_config);
+		res = i2s_driver_install(CONFIG_I2S_NUM, &i2s_config, 0, NULL);
+		res |= i2s_set_pin(CONFIG_I2S_NUM, &i2s_pin_config);
 		LOG_INFO("SPDIF using I2S bck:%u, ws:%u, do:%u", i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, i2s_pin_config.data_out_num);
 	} else {
-#if CONFIG_SPDIF_DO_IO != -1
-		gpio_pad_select_gpio(CONFIG_SPDIF_DO_IO);
-		gpio_set_direction(CONFIG_SPDIF_DO_IO, GPIO_MODE_OUTPUT);
-		gpio_set_level(CONFIG_SPDIF_DO_IO, 0);
-#endif
-
+		// turn off SPDIF if configured
+		if (i2s_pin_config.data_out_num >= 0) {
+			gpio_pad_select_gpio(i2s_pin_config.data_out_num);
+			gpio_set_direction(i2s_pin_config.data_out_num, GPIO_MODE_OUTPUT);
+			gpio_set_level(i2s_pin_config.data_out_num, 0);
+		}	
+		
+		char *dac_config = config_alloc_get_str("dac_config", CONFIG_DAC_CONFIG, "model=i2s,bck=" STR(CONFIG_I2S_BCK_IO) 
+												",ws=" STR(CONFIG_I2S_WS_IO) ",do=" STR(CONFIG_I2S_DO_IO) 
+												",sda=" STR(CONFIG_I2C_SDA) ",scl=" STR(CONFIG_I2C_SCL)
+												",mute" STR(CONFIG_MUTE_GPIO));
+		char model[32] = "i2s";
+		if ((p = strcasestr(dac_config, "model")) != NULL) sscanf(p, "%*[^=]=%31[^,]", model);
+		
+		for (int i = 0; adac == &dac_external && dac_set[i]; i++) if (strcasestr(dac_set[i]->model, model)) adac = dac_set[i];
+		res = adac->init(dac_config, I2C_PORT) ? ESP_OK : ESP_FAIL;
+		
+		if ((p = strcasestr(dac_config, "bck")) != NULL) i2s_pin_config.bck_io_num = atoi(strchr(p, '=') + 1);
+		if ((p = strcasestr(dac_config, "ws")) != NULL) i2s_pin_config.ws_io_num = atoi(strchr(p, '=') + 1);
+		if ((p = strcasestr(dac_config, "do")) != NULL) i2s_pin_config.data_out_num = atoi(strchr(p, '=') + 1);
+		if ((p = strcasestr(dac_config, "mute")) != NULL) {
+			char mute[8];
+			sscanf(p, "%*[^=]=%7[^,]", mute);
+			mute_control.gpio = atoi(mute);
+			if ((p = strchr(mute, ':')) != NULL) mute_control.active = atoi(p + 1);
+		}	
+		
+		free(dac_config);
+		
 		i2s_config.sample_rate = output.current_sample_rate;
 		i2s_config.bits_per_sample = bytes_per_frame * 8 / 2;
 		// Counted in frames (but i2s allocates a buffer <= 4092 bytes)
 		i2s_config.dma_buf_len = DMA_BUF_LEN;	
 		i2s_config.dma_buf_count = DMA_BUF_COUNT;
-		dma_buf_frames = DMA_BUF_COUNT * DMA_BUF_LEN;	
+		dma_buf_frames = DMA_BUF_COUNT * DMA_BUF_LEN;			
 		
-		// finally let DAC driver initialize I2C and I2S
-		if (dac_tas57xx.init(I2C_PORT, CONFIG_I2S_NUM, &i2s_config)) adac = &dac_tas57xx;
-		else if (dac_a1s.init(I2C_PORT, CONFIG_I2S_NUM, &i2s_config)) adac = &dac_a1s;
-		else if (!dac_external.init(I2C_PORT, CONFIG_I2S_NUM, &i2s_config)) {
-			LOG_WARN("DAC not configured and SPDIF not enabled, I2S will not continue");
-			return;
-		}
+		res |= i2s_driver_install(CONFIG_I2S_NUM, &i2s_config, 0, NULL);
+		res |= i2s_set_pin(CONFIG_I2S_NUM, &i2s_pin_config);
+		
+		if (res == ESP_OK && mute_control.gpio >= 0) {
+			gpio_pad_select_gpio(mute_control.gpio);
+			gpio_set_direction(mute_control.gpio, GPIO_MODE_OUTPUT);
+			gpio_set_level(mute_control.gpio, mute_control.active);
+		}		
+				
+		LOG_INFO("%s DAC using I2S bck:%d, ws:%d, do:%d, mute:%d:%d (res:%d)", model, i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, 
+																   i2s_pin_config.data_out_num, mute_control.gpio, mute_control.active, res);
+	}	
+	
+	free(spdif_config);
+	
+	if (res != ESP_OK) {
+		LOG_WARN("no DAC configured");
+		return;
 	}	
 
 	LOG_INFO("Initializing I2S mode %s with rate: %d, bits per sample: %d, buffer frames: %d, number of buffers: %d ", 
@@ -314,8 +354,8 @@ void output_close_i2s(void) {
  * change volume
  */
 bool output_volume_i2s(unsigned left, unsigned right) {
-	adac->volume(left, right);
-	return false;	
+	if (mute_control.gpio >= 0) gpio_set_level(mute_control.gpio, (left | right) ? !mute_control.active : mute_control.active);
+	return adac->volume(left, right);
 } 
 
 /****************************************************************************************
@@ -396,8 +436,8 @@ static void *output_thread_i2s(void *arg) {
 			LOG_INFO("Output state is %d", output.state);
 			if (output.state == OUTPUT_OFF) {
 				led_blink(LED_GREEN, 100, 2500);
-				if (amp_gpio != -1) gpio_set_level(amp_gpio, 0);
-				LOG_INFO("switching off amp GPIO %d", amp_gpio);
+				if (amp_control.gpio != -1) gpio_set_level(amp_control.gpio, !amp_control.active);
+				LOG_INFO("switching off amp GPIO %d", amp_control.gpio);
 			} else if (output.state == OUTPUT_STOPPED) {
 				adac->speaker(false);
 				led_blink(LED_GREEN, 200, 1000);
@@ -460,7 +500,7 @@ static void *output_thread_i2s(void *arg) {
 			i2s_zero_dma_buffer(CONFIG_I2S_NUM);
 			i2s_start(CONFIG_I2S_NUM);
 			adac->power(ADAC_ON);	
-			if (amp_gpio != -1) gpio_set_level(amp_gpio, 1);
+			if (amp_control.gpio != -1) gpio_set_level(amp_control.gpio, amp_control.active);
 		} 
 		
 		// this does not work well as set_sample_rates resets the fifos (and it's too early)
diff --git a/components/squeezelite/tas57xx/dac_57xx.c b/components/squeezelite/tas57xx/dac_57xx.c
index ee5e391f..bf06d0d9 100644
--- a/components/squeezelite/tas57xx/dac_57xx.c
+++ b/components/squeezelite/tas57xx/dac_57xx.c
@@ -9,28 +9,28 @@
  *
  */
  
-#include "squeezelite.h" 
+#include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "driver/i2s.h"
 #include "driver/i2c.h"
 #include "driver/gpio.h"
+#include "esp_log.h"
 #include "adac.h"
 
-// this is the only hard-wired thing
-#define VOLUME_GPIO	14	
-
 #define TAS575x 0x98
 #define TAS578x	0x90
 
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *config);
+static const char TAG[] = "TAS575x/8x";
+
+static bool init(char *config, int i2c_port_num);
 static void deinit(void);
 static void speaker(bool active);
 static void headset(bool active);
-static void volume(unsigned left, unsigned right);
+static bool volume(unsigned left, unsigned right);
 static void power(adac_power_e mode);
 
-struct adac_s dac_tas57xx = { init, deinit, power, speaker, headset, volume };
+const struct adac_s dac_tas57xx = { "TAS57xx", init, deinit, power, speaker, headset, volume };
 
 struct tas57xx_cmd_s {
 	uint8_t reg;
@@ -59,8 +59,7 @@ static const struct tas57xx_cmd_s tas57xx_cmd[] = {
 	{ 0x56, 0x00 },	// TAS57_ANALOGUE_ON
 };
 
-static log_level loglevel = lINFO;
-static u8_t tas57_addr;
+static uint8_t tas57_addr;
 static int i2c_port;
 
 static void dac_cmd(dac_cmd_e cmd, ...);
@@ -69,19 +68,23 @@ static int tas57_detect(void);
 /****************************************************************************************
  * init
  */
-static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config)	{	 
+static bool init(char *config, int i2c_port_num)	{	 
 	i2c_port = i2c_port_num;
-		
+	char *p;	
+	
 	// configure i2c
 	i2c_config_t i2c_config = {
 			.mode = I2C_MODE_MASTER,
-			.sda_io_num = 27,
+			.sda_io_num = -1,
 			.sda_pullup_en = GPIO_PULLUP_ENABLE,
-			.scl_io_num = 26,
+			.scl_io_num = -1,
 			.scl_pullup_en = GPIO_PULLUP_ENABLE,
-			.master.clk_speed = 100000,
+			.master.clk_speed = 250000,
 		};
-		
+
+	if ((p = strcasestr(config, "sda")) != NULL) i2c_config.sda_io_num = atoi(strchr(p, '=') + 1);
+	if ((p = strcasestr(config, "scl")) != NULL) i2c_config.scl_io_num = atoi(strchr(p, '=') + 1);
+	
 	i2c_param_config(i2c_port, &i2c_config);
 	i2c_driver_install(i2c_port, I2C_MODE_MASTER, false, false, false);
 		
@@ -89,13 +92,11 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config)	{
 	tas57_addr = tas57_detect();
 	
 	if (!tas57_addr) {
-		LOG_WARN("No TAS57xx detected");
+		ESP_LOGW(TAG, "No TAS57xx detected");
 		i2c_driver_delete(i2c_port);
-		return 0;
+		return false;
 	}
-	
-	LOG_INFO("TAS57xx DAC using I2C sda:%u, scl:%u", i2c_config.sda_io_num, i2c_config.scl_io_num);
-	
+
 	i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
 	
 	for (int i = 0; tas57xx_init_sequence[i].reg != 0xff; i++) {
@@ -103,32 +104,21 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config)	{
 		i2c_master_write_byte(i2c_cmd, tas57_addr | I2C_MASTER_WRITE, I2C_MASTER_NACK);
 		i2c_master_write_byte(i2c_cmd, tas57xx_init_sequence[i].reg, I2C_MASTER_NACK);
 		i2c_master_write_byte(i2c_cmd, tas57xx_init_sequence[i].value, I2C_MASTER_NACK);
-
-		LOG_DEBUG("i2c write %x at %u", tas57xx_init_sequence[i].reg, tas57xx_init_sequence[i].value);
+		ESP_LOGD(TAG, "i2c write %x at %u", tas57xx_init_sequence[i].reg, tas57xx_init_sequence[i].value);
 	}
 
 	i2c_master_stop(i2c_cmd);	
 	esp_err_t res = i2c_master_cmd_begin(i2c_port, i2c_cmd, 500 / portTICK_RATE_MS);
     i2c_cmd_link_delete(i2c_cmd);
 
-	// configure I2S pins & install driver	
-	i2s_pin_config_t i2s_pin_config = (i2s_pin_config_t) { 	.bck_io_num = CONFIG_I2S_BCK_IO, .ws_io_num = CONFIG_I2S_WS_IO, 
-														.data_out_num = CONFIG_I2S_DO_IO, .data_in_num = CONFIG_I2S_DI_IO,
-								};
-	res |= i2s_driver_install(i2s_num, i2s_config, 0, NULL);
-	res |= i2s_set_pin(i2s_num, &i2s_pin_config);
-	LOG_INFO("DAC using I2S bck:%d, ws:%d, do:%d", i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, i2s_pin_config.data_out_num);
+	ESP_LOGI(TAG, "TAS57xx uses I2C sda:%d, scl:%d", i2c_config.sda_io_num, i2c_config.scl_io_num);
 	
-	if (res == ESP_OK) {
-		// init volume & mute
-		gpio_pad_select_gpio(VOLUME_GPIO);
-		gpio_set_direction(VOLUME_GPIO, GPIO_MODE_OUTPUT);
-		gpio_set_level(VOLUME_GPIO, 0);
-		return true;
-	} else {
-		LOG_ERROR("could not intialize TAS57xx %d", res);
+	if (res != ESP_OK) {
+		ESP_LOGE(TAG, "could not intialize TAS57xx %d", res);
 		return false;
 	}	
+	
+	return true;
 }	
 
 /****************************************************************************************
@@ -141,10 +131,7 @@ static void deinit(void)	{
 /****************************************************************************************
  * change volume
  */
-static void volume(unsigned left, unsigned right) {
-	LOG_INFO("TAS57xx volume (L:%u R:%u)", left, right);
-	gpio_set_level(VOLUME_GPIO, left || right);
-} 
+static bool volume(unsigned left, unsigned right) { return false; }
 
 /****************************************************************************************
  * power
@@ -161,7 +148,7 @@ static void power(adac_power_e mode) {
 		dac_cmd(TAS57_DOWN);
 		break;				
 	default:
-		LOG_WARN("unknown DAC command");
+		ESP_LOGW(TAG, "unknown DAC command");
 		break;
 	}
 }
@@ -177,8 +164,7 @@ static void speaker(bool active) {
 /****************************************************************************************
  * headset
  */
-static void headset(bool active) {
-} 
+static void headset(bool active) { } 
  
 /****************************************************************************************
  * DAC specific commands
@@ -192,7 +178,7 @@ void dac_cmd(dac_cmd_e cmd, ...) {
 
 	switch(cmd) {
 	case TAS57_VOLUME:
-		LOG_ERROR("DAC volume not handled yet");
+		ESP_LOGE(TAG, "DAC volume not handled yet");
 		break;
 	default:
 		i2c_master_start(i2c_cmd);
@@ -206,7 +192,7 @@ void dac_cmd(dac_cmd_e cmd, ...) {
     i2c_cmd_link_delete(i2c_cmd);
 	
 	if (ret != ESP_OK) {
-		LOG_ERROR("could not intialize TAS57xx %d", ret);
+		ESP_LOGE(TAG, "could not intialize TAS57xx %d", ret);
 	}
 
 	va_end(args);
@@ -216,7 +202,7 @@ void dac_cmd(dac_cmd_e cmd, ...) {
  * TAS57 detection
  */
 static int tas57_detect(void) {
-	u8_t data, addr[] = {TAS578x, TAS575x};
+	uint8_t data, addr[] = {TAS578x, TAS575x};
 	int ret;
 	
 	for (int i = 0; i < sizeof(addr); i++) {
@@ -235,7 +221,7 @@ static int tas57_detect(void) {
 		i2c_cmd_link_delete(i2c_cmd);	
 		
 		if (ret == ESP_OK) {
-			LOG_INFO("Detected TAS @0x%x", addr[i]);
+			ESP_LOGI(TAG, "Detected TAS @0x%x", addr[i]);
 			return addr[i];
 		}	
 	}	
diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
index b9aa2ce4..17f1bc25 100644
--- a/main/Kconfig.projbuild
+++ b/main/Kconfig.projbuild
@@ -21,6 +21,7 @@ menu "Squeezelite-ESP32"
         	help
         		Set logging level info|debug|sdebug 	
 	endmenu
+	
 	config JACK_LOCKED
 		bool
 	config BAT_LOCKED	
@@ -33,59 +34,109 @@ menu "Squeezelite-ESP32"
 		bool				
 	config SPKFAULT_LOCKED
 		bool				
-    menu "Audio Output"
-		choice OUTPUT_TYPE
-			prompt "Output Type"
-	        default BASIC_I2C_BT
-	        help
-	            Type of hardware platform
-	        config SQUEEZEAMP 
-				bool "SqueezeAMP"
-				select JACK_LOCKED
-				select BAT_LOCKED
-				select I2C_LOCKED
-				select SPDIF_LOCKED
-				select LED_LOCKED
-				select SPKFAULT_LOCKED
-			config A1S
-	            bool "ESP32-A1S module"				
-				select I2C_LOCKED
-	        config BASIC_I2C_BT
-	            bool "Generic I2S & Bluetooth"
-	    endchoice
-	  	
-		menu "DAC I2S settings" 
+	config MUTE_GPIO_LEVEL
+		int 
+		default 0
+		
+# AGGREGATES - begin
+# these parameters are "aggregates"	that take precedence. The must have a default value	
+	config DAC_CONFIG
+		string 
+		default "model=TAS57xx,bck=33,ws=25,do=32,sda=27,scl=26,mute=14:0" if SQUEEZEAMP
+		default "model=AC101,bck=27,ws=26,do=25,di=35,sda=33,scl=32" if A1S
+		default "model=I2S,bck=26,ws=25,do=33,i2c=106,sda=21,scl=22" if TWATCH2020
+		default ""
+	config SPDIF_CONFIG		
+		string
+		default "bck=33,ws=25,do=15" if SQUEEZEAMP
+		default	""
+	config SPI_CONFIG
+		string
+		default "dc=27,data=19,clk=18" if TWATCH2020		
+		default	""
+	config DISPLAY_CONFIG
+		string
+		default "SPI,driver=ST7789,width=240,height=240,cs=5,back=12,speed=16000000,HFlip,VFlip" if TWATCH2020
+		default ""
+	config DAC_CONTROLSET
+		string
+		default "{ \"init\": [ {\"reg\":41, \"val\":128}, {\"reg\":18, \"val\":255} ], \"poweron\": [ {\"reg\":18, \"val\":64, \"mode\":\"or\"} ], \"poweroff\": [ {\"reg\":18, \"val\":191, \"mode\":\"and\"} ] }" if TWATCH2020
+		default ""		
+# AGGREGATES - end		
+		
+	choice OUTPUT_TYPE
+		prompt "Main system"
+	       default BASIC_I2C_BT
+	       help
+	           Type of hardware platform
+	       config SQUEEZEAMP 
+			bool "SqueezeAMP"
+			select JACK_LOCKED
+			select BAT_LOCKED
+			select I2C_LOCKED
+			select LED_LOCKED
+			select SPKFAULT_LOCKED
+		config A1S
+	           bool "ESP32-A1S module"				
+			select I2C_LOCKED
+		config TWATCH2020	
+			bool "T-WATCH2020 by LilyGo"				
+			select I2C_LOCKED				
+	       config BASIC_I2C_BT
+	           bool "Generic I2S & Bluetooth"
+	endchoice		
+
+	menu "Audio settings"
+		menu "DAC settings" 
 			visible if BASIC_I2C_BT
-			config I2S_NUM         
-		        int "I2S channel (0 or 1). "
-		        default 0
-		        help
-		            I2S dma channel to use.  
-		    config I2S_BCK_IO         
-		        int "I2S Bit clock GPIO number. "
-				default 33 if !A1S
-		        default 27 if A1S
-		        help
-		            I2S Bit Clock gpio pin to use.  
-		    config I2S_WS_IO         
-		        int "I2S Word Select GPIO number. "
-		        default 25 if !A1S
-				default 26 if A1S
-		        help
-		            I2S Word Select gpio pin to use.
-		    config I2S_DO_IO         
-		        int "I2S Data Output GPIO number. "
-		        default 32 if !A1S
-				default 25 if A1S
-		        help
-		            I2S data output gpio pin to use.
-			config I2S_DI_IO         
-		        int "I2S Data Input GPIO number. "
-		        default -1 if !A1S
-				default 35 if A1S
-		        help
-		            I2S data input gpio pin to use (not used mostly, leave it to -1).					
-					
+			menu "I2S settings"
+				config I2S_NUM         
+					int "I2S channel (0 or 1). "
+					default 0
+					help
+						I2S dma channel to use.  
+				config I2S_BCK_IO         
+					int "I2S Bit clock GPIO number. "
+					default 33 
+					help
+						I2S Bit Clock gpio pin to use.  
+				config I2S_WS_IO         
+					int "I2S Word Select GPIO number. "
+					default 25 
+					help
+						I2S Word Select gpio pin to use.
+				config I2S_DO_IO         
+					int "I2S Data Output GPIO number. "
+					default 32
+					help
+						I2S data output gpio pin to use.
+				config I2S_DI_IO         
+					int "I2S Data Input GPIO number. "
+					default -1 if !A1S
+					help
+						I2S data input gpio pin to use (not used mostly, leave it to -1).					
+			endmenu
+			menu "I2C settings"	
+				config I2C_SDA
+					int "I2C SDA GPIO number for DAC control. "
+					default -1
+					help
+						I2C data gpio pin to use with DAC (not used mostly, leave it to -1).										
+				config I2C_SCL
+					int "I2C SCL GPIO number for DAC control. "
+					default -1
+					help
+						I2C clock gpio pin to use with DAC (not used mostly, leave it to -1).															
+			endmenu		
+			config MUTE_GPIO
+				int "GPIO for muting DAC"
+				default -1 
+				help
+					GPIO used to mute DAC (not used mostly, leave it to -1).															
+			config MUTE_GPIO_LEVEL
+				int "Mute GPIO active level"
+				depends on MUTE_GPIO != -1
+				default 1 					
 		endmenu
 		
 		menu "SPDIF settings" 
@@ -107,9 +158,7 @@ menu "Squeezelite-ESP32"
 		            Must be set as SPDIF re-uses I2S but only needs DO (recommendation: set it to I2S Word select value)
 		    config SPDIF_DO_IO         
 		        int "SPDIF Data I/O GPIO number"
-		        default 15 if SQUEEZEAMP
-				default I2S_DO_IO if !A1S
-				default -1 if A1S
+		        default -1
 				help
 		            I2S data output IO use to simulate SPDIF
 		endmenu
@@ -181,16 +230,17 @@ menu "Squeezelite-ESP32"
 	endmenu	
 
 	menu "Display Screen"
+		depends on !TWATCH2020
 		config DISPLAY_CONFIG
 			string "Screen configuraton"
-			default ""
 			help
 				Set parameters for display screen, leave empty for no screen
-				I2C,width=<pixels>,height=<pixels>[address=<i2c_address>][,HFlip][,VFlip]
-				SPI,width=<pixels>,height=<pixels>,cs=<gpio>[,HFlip][,VFlip]
+				I2C,driver=<model>,width=<pixels>,height=<pixels>[address=<i2c_address>][,HFlip][,VFlip][,rotate]
+				SPI,driver=<model>,width=<pixels>,height=<pixels>,cs=<gpio>[,HFlip][,VFlip][,rotate]
 	endmenu	
 	
 	menu "Various I/O"
+		visible if !TWATCH2020
 		config I2C_CONFIG
 			string "I2C system configuration"
 			default ""
@@ -199,7 +249,6 @@ menu "Squeezelite-ESP32"
 				sda=<gpio>,scl=<gpio>[,speed=<num>][,port=<0|1>]
 		config SPI_CONFIG
 			string "SPI system configuration"
-			default ""
 			help
 				Set parameters of shared SPI interface
 				data=<gpio>,clk=<gpio>[,d/c=<num>][,host=<0|1|2>]				
@@ -208,7 +257,7 @@ menu "Squeezelite-ESP32"
 			default ""
 			help
 				Set parameters of shared GPIO with special values. 
-				<gpio_1>=Vcc|GND|amp|jack[:0|1][,<gpio_n>=Vcc|GND|amp|jack[:0|1]]
+				<gpio_1>=Vcc|GND|amp[:0|1]|jack[:0|1][,<gpio_n>=Vcc|GND|amp[:0|1]|jack[:0|1]]
 				'amp'  => GPIO that is set when playback starts 
 				'jack' => GPIO used for audio jack detection
 				'green', 'red' => GPIO for status LED
@@ -218,40 +267,39 @@ menu "Squeezelite-ESP32"
 			default ""
 			help
 				Set GPIO for rotary encoder (quadrature phase). See README on SqueezeESP32 project's GitHub for more details
-				A=<gpio>,B=<gpio>[,SW=gpio>[,volume][,longpress]]
-								
+				A=<gpio>,B=<gpio>[,SW=gpio>[[,knobonly[=<ms>]|[,volume][,longpress]]			
 	endmenu
 	menu "LED configuration"
-		visible if !SQUEEZEAMP
+		visible if !SQUEEZEAMP && !TWATCH2020
 		config LED_GREEN_GPIO
 			int "Green led GPIO"
-			default -1 if !SQUEEZEAMP
-			default 12 if SQUEEZEAMP
+			default 12 if SQUEEZEAMP			
+			default -1 
 			help
 				Set to -1 for no LED
 		config LED_GREEN_GPIO_LEVEL
 			int "Green led ON level"
 			depends on LED_GREEN_GPIO != -1
 			default 0 if SQUEEZEAMP
-			default 1 if !SQUEEZEAMP
+			default 1 
 		config LED_RED_GPIO				
 			int "Red led GPIO"
-			default -1 if !SQUEEZEAMP
 			default 13 if SQUEEZEAMP
+			default -1
 			help
 				Set to -1 for no LED
 		config LED_RED_GPIO_LEVEL
 			int "Red led ON level"
 			depends on LED_RED_GPIO != -1
 			default 0 if SQUEEZEAMP
-			default 1 if !SQUEEZEAMP
+			default 1
 	endmenu
     menu "Audio JACK"	
-		visible if !SQUEEZEAMP
+		visible if !SQUEEZEAMP && !TWATCH2020
 		config JACK_GPIO		
 			int "Jack insertion GPIO"
-			default -1 if !SQUEEZEAMP
 			default 34 if SQUEEZEAMP
+			default -1
 			help
 				GPIO to detect speaker jack insertion. Set to -1 for no detection. 
 		config JACK_GPIO_LEVEL
@@ -260,11 +308,11 @@ menu "Squeezelite-ESP32"
 			default 0
 	endmenu	
 	menu "Speaker Fault"	
-		visible if !SQUEEZEAMP
+		visible if !SQUEEZEAMP && !TWATCH2020
 		config SPKFAULT_GPIO		
 			int "Speaker fault GPIO"
-			default -1 if !SQUEEZEAMP
 			default 2 if SQUEEZEAMP
+			default -1
 			help
 				GPIO to detect speaker fault condition. Set to -1 for no detection. 
 		config SPKFAULT_GPIO_LEVEL
@@ -273,18 +321,18 @@ menu "Squeezelite-ESP32"
 			default 0
 	endmenu	
 	menu "Battery measure"	
-		visible if !SQUEEZEAMP
+		visible if !SQUEEZEAMP && !TWATCH2020
 		config BAT_CHANNEL	
 			int "Set channel (0..7)"
-			default -1 if !SQUEEZEAMP
 			default 7 if SQUEEZEAMP
+			default -1 
 			help
 				Read a value every 10s on ADC1 on set Channel
 		config BAT_SCALE	
 			string "Set scaling factor"
 			depends on BAT_CHANNEL != -1
-			default "" if !SQUEEZEAMP
 			default "20.24" if SQUEEZEAMP
+			default "" 
 			help
 				Set the scaling factor for this 12 bits ADC
 	endmenu	
diff --git a/main/esp_app_main.c b/main/esp_app_main.c
index 293a1268..03aadb4a 100644
--- a/main/esp_app_main.c
+++ b/main/esp_app_main.c
@@ -359,7 +359,8 @@ void register_default_nvs(){
 	ESP_LOGD(TAG,"Registering default value for key %s", "dac_config");
 	config_set_default(NVS_TYPE_STR, "dac_config", "", 0);
 	//todo: add dac_config for known targets
-
+	ESP_LOGD(TAG,"Registering default value for key %s", "dac_controlset");
+	config_set_default(NVS_TYPE_STR, "dac_controlset", "", 0);
 	
 	ESP_LOGD(TAG,"Registering default value for key %s", "bat_config");
 	config_set_default(NVS_TYPE_STR, "bat_config", "", 0);