Add setters for volume / muted + extend example.

MiniDSP.cpp

@@ -22,13 +22,28 @@
 #include "MiniDSP.h"
 
 void MiniDSP::ParseHIDData(USBHID *hid __attribute__ ((unused)), bool is_rpt_id __attribute__ ((unused)), uint8_t len, uint8_t *buf) {
-        constexpr uint8_t InputCommand[] = {0x05, 0xFF};
-
         // Only care about valid data for the MiniDSP 2x4HD.
         if(HIDUniversal::VID != MINIDSP_VID || HIDUniversal::PID != MINIDSP_PID || len <= 4 || buf == nullptr)
                 return;
 
-        // Only deal with valid inputs.
+        // Check if this is a requested mute change.
+        if(buf[1] == 0x17){
+                // Response is of format [ length ] [ 0x17 ] [ muted ]
+                muted = (bool)buf[2];
+                Serial.println("Muted was set to: " + String(muted));
+        }
+
+        // Check if this is a requested volume change.
+        if(buf[1] == 0x42){
+                // Response is of format [ length ] [ 0x42 ] [ volume ]
+                volume = buf[2];
+                                Serial.println("Volume was set to: " + String(volume));
+
+        }
+
+        constexpr uint8_t InputCommand[] = {0x05, 0xFF};
+
+        // Only deal with status updates from now on.
         if(memcmp(buf + 1, InputCommand, sizeof (InputCommand)) != 0)
                 return;
 
@@ -161,4 +176,22 @@ void MiniDSP::RequestConfig() const {
         uint8_t RequestConfigCommand[] = {0x05, 0xFF, 0xD8, 0x01};
 
         SendCommand(RequestConfigCommand, sizeof(RequestConfigCommand));
+}
+
+void MiniDSP::setVolumeDB(float volumeDB) const {
+        // Only accept values between 0dB and -127.5dB.
+        // Don't do error handling.
+        if(volume > 0 || volume < -127.5){
+                return;
+        }
+
+        uint8_t SetVolumeCommand[] = {0x42, (int)-2*volumedB};
+
+        SendCommand(SetVolumeCommand, sizeof(SetVolumeCommand));
+}
+
+void MiniDSP::setMuted(bool muted) const {
+        uint8_t SetMutedommand[] = {0x17, muted ? 0x01 : 0x00};
+
+        SendCommand(SetMutedommand, sizeof(SetMutedommand));
 }

MiniDSP.h

@@ -148,6 +148,27 @@ public:
                 return inputSource;
         }
 
+        /**
+         * Set volume of the MiniDSP in dB. Values between 0 and -127.5 are
+         * accepted. If any values outside if this range are passed, this
+         * function does nothing.
+         *
+         * Calling this function will not trigger the volume change callback.
+         *
+         * @param volumeDB New volume to set.
+         */
+        void setVolumeDB(float volumeDB) const;
+
+
+        /**
+         * Mute or unmute the MiniDSP.
+         *
+         * Calling this function will not trigger the mute change callback.
+         *
+         * @param muted Muted status.
+         */
+        void setMuted(bool muted) const;
+
 protected:
         /** @name HIDUniversal implementation */
         /**

examples/MiniDSP/MiniDSP.ino

@@ -39,6 +39,21 @@ void OnInputSourceChange(MiniDSP::InputSource inputSource) {
   Serial.println("Input source: " + inputSourceStr);
 }
 
+void OnConfigChange(MiniDSP::Config config) {
+  String configStr = "Unknown";
+
+  if (config == MiniDSP::Config::Config_1) {
+    configStr = "Config 1";
+  } else if (config == MiniDSP::Config::Config_2) {
+    configStr = "Config 2";
+  } else if (config == MiniDSP::Config::Config_3) {
+    configStr = "Config 3";
+  } else if (config == MiniDSP::Config::Config_4) {
+    configStr = "Config 4";
+  }
+  Serial.println("Config: " + configStr);
+}
+
 void setup() {
   Serial.begin(115200);
 #if !defined(__MIPSEL__)
@@ -55,6 +70,7 @@ void setup() {
   MiniDSP.attachOnVolumeChange(&OnVolumeChange);
   MiniDSP.attachOnMutedChange(&OnMutedChange);
   MiniDSP.attachOnInputSourceChange(&OnInputSourceChange);
+  MiniDSP.attachOnConfigChange(&OnConfigChange);
 }
 
 void loop() {