control_3206: add ability to set headphone amp volume (and clarify se…

…tting DAC volume)

src/control_aic3206.cpp

@@ -517,12 +517,44 @@ float AudioControlAIC3206::volume_dB(float orig_vol_dB, int Ichan) {  // 0 = Lef
 	return vol_dB;
 }
 float AudioControlAIC3206::volume_dB(float vol_left_dB, float vol_right_dB) {
-	volume_dB(vol_right_dB, 1);       //set right channel
-	return volume_dB(vol_left_dB, 0); //set left channel
+	volume_dB(vol_right_dB,       (int)1); //set right channel
+	return volume_dB(vol_left_dB, (int)0); //set left channel
 }
 float AudioControlAIC3206::volume_dB(float vol_dB) {
-	vol_dB = volume_dB(vol_dB, 1);  //set right channel
-	return volume_dB(vol_dB, 0);    //set left channel
+	vol_dB = volume_dB(vol_dB, (int)1);     //set right channel
+	return volume_dB(vol_dB,   (int)0);    //set left channel
+}
+
+float AudioControlAIC3206::setHeadphoneGain_dB(float gain_left_dB, float gain_right_dB) {
+	unsigned int buff = 0;
+	int8_t left_dB_u8 = 0;
+	int8_t right_dB_u8 = 0;
+
+	// round to nearest dB and clamp limits
+	left_dB_u8 = (int)(gain_left_dB + 0.5); 
+	right_dB_u8 = (int)(gain_right_dB + 0.5); 
+
+	left_dB_u8 = constrain(left_dB_u8, AIC3206_HP_VOLUME_MIN, AIC3206_HP_VOLUME_MAX);
+	right_dB_u8 = constrain(gain_right_dB, AIC3206_HP_VOLUME_MIN, AIC3206_HP_VOLUME_MAX);
+
+	//check to see if they want it muted
+	if (gain_left_dB < -90.0) left_dB_u8 = 0b00111001; //mute it
+	if (gain_right_dB < -90.0) right_dB_u8 = 0b00111001; //mute it
+
+	// Set Left Volume
+	//aic_goToBook(0);
+	buff = aic_readPage(AIC3206_HP_VOLUME_PAGE, AIC3206_HPL_VOLUME_REG); //read existing register value
+	buff = (buff & (~AIC3206_HP_VOLUME_MASK)) | (left_dB_u8 & AIC3206_HP_VOLUME_MASK);
+
+	aic_writePage( AIC3206_HP_VOLUME_PAGE, AIC3206_HPL_VOLUME_REG, uint8_t(buff) );
+
+	// Set Right Volume
+	buff = aic_readPage(AIC3206_HP_VOLUME_PAGE, AIC3206_HPR_VOLUME_REG); //read existing register value
+	buff = (buff & (~AIC3206_HP_VOLUME_MASK)) | (right_dB_u8 & AIC3206_HP_VOLUME_MASK);
+
+	aic_writePage( AIC3206_HP_VOLUME_PAGE, AIC3206_HPR_VOLUME_REG, uint8_t(buff) );
+
+	return left_dB_u8;
 }
 
 int AudioControlAIC3206::unmuteDAC(int chan) {

src/control_aic3206.h

@@ -24,13 +24,6 @@
 #define TYMPAN_LEFT_JACK_AS_LINEIN_RIGHT_ON_BOARD_MIC   (AudioControlAIC3206::IN3_IN2) //use pink jack for left and on-board mic for right
 #define TYMPAN_LEFT_JACK_AS_MIC_RIGHT_ON_BOARD_MIC      (AudioControlAIC3206::IN3_wBIAS_IN2) //use pink jack (with bias) for left and on-board mic for right
 
-
-//convenience names to use with outputSelect()
-#define TYMPAN_OUTPUT_HEADPHONE_JACK_OUT 1  //DAC left and right to headphone left and right
-#define TYMPAN_OUTPUT_LINE_OUT 2 //DAC left and right to lineout left and right
-#define TYMPAN_OUTPUT_HEADPHONE_AND_LINE_OUT 3  //DAC left and right to both headphone and line out
-#define TYMPAN_OUTPUT_LEFT2DIFFHP_AND_R2DIFFLO 4 //DAC left to differential headphone, DAC right to line out
-
 //names to use with setMicBias() to set the amount of bias voltage to use
 #define TYMPAN_MIC_BIAS_OFF             0
 #define TYMPAN_MIC_BIAS_1_25            1
@@ -39,10 +32,27 @@
 #define TYMPAN_MIC_BIAS_VSUPPLY         4
 #define TYMPAN_DEFAULT_MIC_BIAS TYMPAN_MIC_BIAS_2_5
 
+//convenience names to use with outputSelect()
+#define TYMPAN_OUTPUT_HEADPHONE_JACK_OUT 1  //DAC left and right to headphone left and right
+#define TYMPAN_OUTPUT_LINE_OUT 2 //DAC left and right to lineout left and right
+#define TYMPAN_OUTPUT_HEADPHONE_AND_LINE_OUT 3  //DAC left and right to both headphone and line out
+#define TYMPAN_OUTPUT_LEFT2DIFFHP_AND_R2DIFFLO 4 //DAC left to differential headphone, DAC right to line out
+
+// Headphone Volume 
+#define AIC3206_HP_VOLUME_PAGE 0x01
+#define AIC3206_HPL_VOLUME_REG 0x10  //decimal 16
+#define AIC3206_HPR_VOLUME_REG 0x11  //decimal 17
+#define AIC3206_HP_VOLUME_MASK 0b00111111
+#define AIC3206_HP_VOLUME_MIN (int8_t)-6
+#define AIC3206_HP_VOLUME_MAX (int8_t)14
+
+
 #define BOTH_CHAN 0
 #define LEFT_CHAN 1
 #define RIGHT_CHAN 2
 
+
+
 //define AIC3206_DEFAULT_I2C_BUS 0   //bus zero is &Wire
 #define AIC3206_DEFAULT_RESET_PIN 42
 
@@ -82,6 +92,10 @@ class AudioControlAIC3206: public TeensyAudioControl
 	float volume_dB(float vol_dB);  //set both channels to the same volume (via the DAC output volume)
 	float volume_dB(float vol_left_dB, float vol_right_dB); //set both channels (via the DAC output volume), but to their own values
 	float volume_dB(float vol_left_dB, int chan); //set each channel seperately (0 = left; 1 = right)
+	float setDacGain_dB(float gain_dB) { return setDacGain_dB(gain_dB, gain_dB); }
+	float setDacGain_dB(float gain_left_dB, float gain_right_dB) { return volume_dB(gain_left_dB, gain_right_dB); } 
+	float setHeadphoneGain_dB(float gain_dB) { return setHeadphoneGain_dB(gain_dB, gain_dB); }
+	float setHeadphoneGain_dB(float vol_left_dB, float vol_right_dB); // set HP volume
 	int muteDAC(int chan = BOTH_CHAN);  //mutes the output DAC
 	int unmuteDAC(int chan = BOTH_CHAN); //unmutes the output DAC
 	int muteHeadphone(int chan = BOTH_CHAN);   //mutes the headphone driver