Testing Tool for Board written.

main/libraries/MIDI/examples/MIDI_Bench/MIDI_Bench.ino

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+#include <MIDI.h>
+
+// This program will measure the time needed to receive, parse and process a
+// NoteOn message.
+// For it to work, please connect RX and TX on the MIDI port:
+// Due, Leonardo and other USB-native Arduinos:     Serial1
+// All other Arduinos:                              Connect pins 2 and 3.
+// The program will then wait for 100 loops and print the results.
+
+#if defined(ARDUINO_SAM_DUE) || defined(USBCON)
+    // Print through USB and bench with Hardware serial
+    MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, midiBench);
+#else
+    #include <SoftwareSerial.h>
+    SoftwareSerial midiSerial(2,3);
+    MIDI_CREATE_INSTANCE(SoftwareSerial, midiSerial, midiBench);
+#endif
+
+// -----------------------------------------------------------------------------
+
+unsigned long gTime_start = 0;
+unsigned long gTime_stop  = 0;
+unsigned gCounter = 0;
+unsigned long gTime_sum   = 0;
+unsigned long gTime_min   = -1;
+unsigned long gTime_max   = 0;
+
+// -----------------------------------------------------------------------------
+
+void handleNoteOn(byte inChannel, byte inNote, byte inVelocity)
+{
+    gTime_stop = micros();
+
+    const unsigned long diff = gTime_stop - gTime_start;
+    gTime_sum += diff;
+
+    if (diff > gTime_max) gTime_max = diff;
+    if (diff < gTime_min) gTime_min = diff;
+
+    if (gCounter++ >= 1000)
+    {
+        const unsigned long average = gTime_sum / (float)gCounter;
+
+        Serial.println("Time to receive NoteOn: ");
+
+        Serial.print("Average: ");
+        Serial.print(average);
+        Serial.println(" microsecs");
+
+        Serial.print("Min:     ");
+        Serial.print(gTime_min);
+        Serial.println(" microsecs");
+
+        Serial.print("Max:     ");
+        Serial.print(gTime_max);
+        Serial.println(" microsecs");
+
+        gCounter = 0;
+        gTime_sum = 0;
+        gTime_max = 0;
+        gTime_min = -1;
+
+        midiBench.turnThruOff();
+    }
+}
+
+// -----------------------------------------------------------------------------
+
+void setup()
+{
+    midiBench.setHandleNoteOn(handleNoteOn);
+    midiBench.begin();
+
+    while(!Serial);
+    Serial.begin(115200);
+    Serial.println("Arduino Ready");
+
+    midiBench.sendNoteOn(69,127,1);
+}
+
+void loop()
+{
+    gTime_start = micros();
+    midiBench.read();
+}