adding surround and bass enhance controls

added last of dap 'bits' to control_sgtl5000.* and include an example
for bass enhance, need to make one for surround stuff.

control_sgtl5000.cpp

 	return modify(DAP_AVC_CTRL,1,1);
 }
 
+unsigned short AudioControlSGTL5000::dap_bass_enhance(float lr_lev, float bass_lev)
+{
+	return modify(DAP_BASS_ENHANCE_CTRL,(0x3F-calcVol(lr_lev,0x3F))<<8|0x7F-calcVol(bass_lev,0x7F),0x3F<<8|0x7F);
+}
+unsigned short AudioControlSGTL5000::dap_bass_enhance(float lr_lev, float bass_lev, uint8_t hpf_bypass, uint8_t cutoff)
+{
+	modify(DAP_BASS_ENHANCE,(hpf_bypass&1)<<8|(cutoff&7)<<4,1<<8|7<<4);
+	return dap_bass_enhance(lr_lev,bass_lev);
+}
+unsigned short AudioControlSGTL5000::dap_bass_enhance_enable(uint8_t n)
+{
+	return modify(DAP_BASS_ENHANCE,n&1,1);
+}
+unsigned short AudioControlSGTL5000::dap_bass_enhance_enable(void)
+{
+	return dap_bass_enhance_enable(1);
+}
+unsigned short AudioControlSGTL5000::dap_surround(uint8_t width)
+{
+	return modify(DAP_SGTL_SURROUND,(width&7)<<4,7<<4);
+}
+unsigned short AudioControlSGTL5000::dap_surround(uint8_t width, uint8_t select)
+{
+	return modify(DAP_SGTL_SURROUND,(width&7)<<4|select&3,7<<4|3);
+}
+unsigned short AudioControlSGTL5000::dap_surround_enable(uint8_t n)
+{
+	if(n) n=3;
+	return modify(DAP_SGTL_SURROUND,n,3);
+}
+unsigned short AudioControlSGTL5000::dap_surround_enable(void)
+{
+	dap_surround_enable(1);
+}
+
+
 unsigned char AudioControlSGTL5000::calcVol(float n, unsigned char range)
 {
 	n=(n*(((float)range)/100))+0.499;

control_sgtl5000.h

 	unsigned short dap_avc(uint8_t maxGain, uint8_t lbiResponse, uint8_t hardLimit, float threshold, float attack, float decay);
 	unsigned short dap_avc_enable(uint8_t n);
 	unsigned short dap_avc_enable(void);
+	unsigned short dap_bass_enhance(float lr_lev, float bass_lev);
+	unsigned short dap_bass_enhance(float lr_lev, float bass_lev, uint8_t hpf_bypass, uint8_t cutoff);
+	unsigned short dap_bass_enhance_enable(uint8_t n);
+	unsigned short dap_bass_enhance_enable(void);
+	unsigned short dap_surround(uint8_t width);
+	unsigned short dap_surround(uint8_t width, uint8_t select);
+	unsigned short dap_surround_enable(uint8_t n);
+	unsigned short dap_surround_enable(void);
 
 	protected:
 	bool muted;

examples/CalcBiquadToneControl/CalcBiquadToneControl.ino

 float tone1=0;
 
 void loop() {
-  // every 10 ms, check for adjustment the tone & vol
-  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) {
     
     float tone2=analogRead(15);
     tone2=floor(((tone2-512)/512)*70)/10;

examples/SGTL5000_Specific/CalcBiquadToneControlDAP/CalcBiquadToneControlDAP.ino

 float tone1=0;
 
 void loop() {
-  // every 10 ms, check for adjustment the tone & vol
-  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) {
     
     float tone2=analogRead(15);
     tone2=floor(((tone2-512)/512)*70)/10;

examples/SGTL5000_Specific/balanceDAC/balanceDAC.ino

 float lastBal=1024;
 
 void loop() {
-  // every 10 ms, check for adjustment the balance & vol
-  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) {
     float bal1=analogRead(15);
     bal1=((bal1-512)/512)*100;
     bal1=(int)bal1;

examples/SGTL5000_Specific/balanceHP/balanceHP.ino

 float vol1=75;
 
 void loop() {
-  // every 10 ms, check for adjustment the balance & vol
-  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) {
     float bal1=analogRead(15);
     bal1=((bal1-512)/512)*100;
     bal1=(int)bal1;

examples/SGTL5000_Specific/dap_avc_agc/dap_avc_agc.ino

 float lastVol=1024;
 
 void loop() {
-  // every 10 ms, check for adjustment the balance & vol
-  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) {
     float vol1=analogRead(15)/10.23;
     vol1=(int)vol1;
     if(lastVol!=vol1)

examples/SGTL5000_Specific/dap_bass_enhance/dap_bass_enhance.ino

+/* DAP Bass enhance example SGTL5000 only
+
+This example code is in the public domain
+*/
+
+#include <Audio.h>
+#include <Wire.h>
+#include <SD.h>
+
+
+const int myInput = AUDIO_INPUT_LINEIN;
+// const int myInput = AUDIO_INPUT_MIC;
+
+// Create the Audio components.  These should be created in the
+// order data flows, inputs/sources -> processing -> outputs
+//
+
+AudioInputI2S       audioInput;         // audio shield: mic or line-in
+AudioOutputI2S      audioOutput;        // audio shield: headphones & line-out
+
+// Create Audio connections between the components
+//
+AudioConnection c1(audioInput, 0, audioOutput, 0); // left passing through
+AudioConnection c2(audioInput, 1, audioOutput, 1); // right passing through
+
+// Create an object to control the audio shield.
+// 
+AudioControlSGTL5000 audioShield;
+
+void setup() {
+  // Audio connections require memory to work.  For more
+  // detailed information, see the MemoryAndCpuUsage example
+  AudioMemory(4);
+  // Enable the audio shield and set the output volume.
+  audioShield.enable();
+  audioShield.inputSelect(myInput);
+  audioShield.volume(75);
+  audioShield.unmuteLineout();
+  // have to enable DAP to use bass enhance
+  audioShield.dap_enable();
+  audioShield.dap_bass_enhance_enable(); // all we need to do for default bass enhancement settings.
+  // audioShield.dap_bass_enhance((float)lr_level,(float)bass_level);
+  // audioShield.dap_bass_enhance((float)lr_level,(float)bass_level,(uint8_t)hpf_bypass,(uint8_t)cutoff);
+  // please see http://www.pjrc.com/teensy/SGTL5000.pdf page 50 for valid values for BYPASS_HPF and CUTOFF
+}
+
+elapsedMillis chgMsec=0;
+float lastVol=1024;
+
+void loop() {
+  // every 10 ms, check for adjustment
+  if (chgMsec > 10) { // more regular updates for actual changes seems better.
+    float vol1=analogRead(15)/10.23;
+    vol1=(int)vol1;
+    if(lastVol!=vol1)
+    {
+      audioShield.volume(vol1);
+      lastVol=vol1;
+    }
+    chgMsec = 0;
+  }
+}
+