Update WM8731 example

control_wm8731.cpp

 
 bool AudioControlWM8731::volumeInteger(unsigned int n)
 {
+	// n = 127 for max volume (+6 dB)
+	// n = 48 for min volume (-73 dB)
+	// n = 0 to 47 for mute
 	if (n > 127) n = 127;
 	 //Serial.print("volumeInteger, n = ");
 	 //Serial.println(n);

control_wm8731.h

 public:
 	bool enable(void);
 	bool disable(void) { return false; }
-	bool volume(float n) { return volumeInteger(n * 0.8 + 47.499); }
+	bool volume(float n) { return volumeInteger(n * 80.0 + 47.499); }
 	bool inputLevel(float n) { return false; }
 	bool inputSelect(int n) { return false; }
 protected:

examples/HardwareTesting/PlaySineMikroe/PlaySineMikroe.ino

-#include <Audio.h>
-#include <Wire.h>
-#include <SPI.h>
-#include <SD.h>
-
-AudioSynthWaveform mysine(AudioWaveformSine);
-AudioOutputI2Sslave dac;
-
-AudioControlWM8731master codec;
-
-AudioConnection c1(mysine,dac);
-
-int volume = 0;
-
-void setup() {
-  codec.enable();
-  delay(100);
-  while (!Serial) ;
-  Serial.println("Begin AudioTest");
-  // Audio connections require memory to work.  For more
-  // detailed information, see the MemoryAndCpuUsage example
-  AudioMemory(15);
-
-  mysine.frequency(440);
-  mysine.amplitude(0.9);
-
-  codec.volume(0.70);
-
-  Serial.println("setup done");
-}
-
-
-
-
-void loop() {
-  /*
-  Serial.print("cpu: ");
-  Serial.print(AudioProcessorUsage());
-  Serial.print(", max: ");
-  Serial.print(AudioProcessorUsageMax());
-  Serial.print(", memory: ");
-  Serial.print(AudioMemoryUsage());
-  Serial.print(", max: ");
-  Serial.print(AudioMemoryUsageMax());
-  
-  Serial.println("");
-  */
-  
-  //int n;
-  //n = analogRead(15);
-  //Serial.println(n);
-  //if (n != volume) {
-    //volume = n;
-    //codec.volume((float)n / 10.23);
-  //}
-  //n = analogRead(16) / 8;
-  //Serial.println(n);
-  //mysine.frequency(200 + n * 4);
-  
-  //delay(5);
-}

examples/HardwareTesting/WM8731MikroSine/WM8731MikroSine.ino

+// Simple sine wave test for WM8731 Audio Codec Board
+//
+// Requires the MikroElektronika Audio Codec board or similar hardware
+//   http://www.mikroe.com/add-on-boards/audio-voice/audio-codec-proto/
+//
+// Recommended connections:
+//
+//    Mikroe   Teensy 3.1
+//    ------   ----------
+//     SCK         9
+//     MISO       13
+//     MOSI       22
+//     ADCL
+//     DACL       23
+//     SDA        18
+//     SCL        19
+//     3.3V      +3.3V
+//     GND        GND
+//
+// This example code is in the public domain.
+
+#include <Audio.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <SD.h>
+
+// GUItool: begin automatically generated code
+AudioSynthWaveform       waveform1;      //xy=110,75
+AudioOutputI2Sslave      i2ss1;          //xy=303,78
+AudioConnection          patchCord1(waveform1, 0, i2ss1, 0);
+AudioConnection          patchCord2(waveform1, 0, i2ss1, 1);
+AudioControlWM8731master wm8731m1;       //xy=230,154
+// GUItool: end automatically generated code
+
+
+void setup() {
+  wm8731m1.enable();
+
+  AudioMemory(15);
+
+  waveform1.begin(WAVEFORM_SINE);
+  waveform1.frequency(440);
+  waveform1.amplitude(0.9);
+
+  wm8731m1.volume(0.50);
+}
+
+
+void loop() {
+}