add additional external ppqn

firmware/Euclidean/display.h

@@ -266,6 +266,12 @@ void DisplayMainPage() {
     case Clock::SOURCE_EXTERNAL_PPQN_4:
       subText = F("4 PPQN");
       break;
+    case Clock::SOURCE_EXTERNAL_PPQN_2:
+      subText = F("2 PPQN");
+      break;
+    case Clock::SOURCE_EXTERNAL_PPQN_1:
+      subText = F("1 PPQN");
+      break;
     case Clock::SOURCE_EXTERNAL_MIDI:
       subText = F("MIDI");
       break;

firmware/Gravity/display.h

@@ -285,6 +285,12 @@ void DisplayMainPage() {
     case Clock::SOURCE_EXTERNAL_PPQN_4:
       subText = F("4 PPQN");
       break;
+    case Clock::SOURCE_EXTERNAL_PPQN_2:
+      subText = F("2 PPQN");
+      break;
+    case Clock::SOURCE_EXTERNAL_PPQN_1:
+      subText = F("1 PPQN");
+      break;
     case Clock::SOURCE_EXTERNAL_MIDI:
       subText = F("MIDI");
       break;

src/clock.h

@@ -17,7 +17,8 @@
 #include "peripherials.h"
 #include "uClock/uClock.h"
 
-// MIDI clock, start, stop, and continue byte definitions - based on MIDI 1.0 Standards.
+// MIDI clock, start, stop, and continue byte definitions - based on MIDI 1.0
+// Standards.
 #define MIDI_CLOCK 0xF8
 #define MIDI_START 0xFA
 #define MIDI_STOP 0xFC
@@ -35,6 +36,8 @@ class Clock {
     SOURCE_INTERNAL,
     SOURCE_EXTERNAL_PPQN_24,
     SOURCE_EXTERNAL_PPQN_4,
+    SOURCE_EXTERNAL_PPQN_2,
+    SOURCE_EXTERNAL_PPQN_1,
     SOURCE_EXTERNAL_MIDI,
     SOURCE_LAST,
   };
@@ -64,7 +67,8 @@ class Clock {
     uClock.start();
   }
 
-    // Handle external clock tick and call user callback when receiving clock trigger (PPQN_4, PPQN_24, or MIDI).
+  // Handle external clock tick and call user callback when receiving clock
+  // trigger (PPQN_4, PPQN_24, or MIDI).
   void AttachExtHandler(void (*callback)()) {
     extUserCallback = callback;
     attachInterrupt(digitalPinToInterrupt(EXT_PIN), callback, RISING);
@@ -79,7 +83,8 @@ class Clock {
   void SetSource(Source source) {
     bool was_playing = !IsPaused();
     uClock.stop();
-        // If we are changing the source from MIDI, disable the serial interrupt handler.
+    // If we are changing the source from MIDI, disable the serial interrupt
+    // handler.
     if (source_ == SOURCE_EXTERNAL_MIDI) {
       NeoSerial.attachInterrupt(serialEventNoop);
     }
@@ -96,6 +101,14 @@ class Clock {
       uClock.setClockMode(uClock.EXTERNAL_CLOCK);
       uClock.setInputPPQN(uClock.PPQN_4);
       break;
+    case SOURCE_EXTERNAL_PPQN_2:
+      uClock.setClockMode(uClock.EXTERNAL_CLOCK);
+      uClock.setInputPPQN(uClock.PPQN_2);
+      break;
+    case SOURCE_EXTERNAL_PPQN_1:
+      uClock.setClockMode(uClock.EXTERNAL_CLOCK);
+      uClock.setInputPPQN(uClock.PPQN_1);
+      break;
     case SOURCE_EXTERNAL_MIDI:
       uClock.setClockMode(uClock.EXTERNAL_CLOCK);
       uClock.setInputPPQN(uClock.PPQN_24);
@@ -107,7 +120,8 @@ class Clock {
     }
   }
 
-    // Return true if the current selected source is externl (PPQN_4, PPQN_24, or MIDI).
+  // Return true if the current selected source is externl (PPQN_4, PPQN_24, or
+  // MIDI).
   bool ExternalSource() {
     return uClock.getClockMode() == uClock.EXTERNAL_CLOCK;
   }
@@ -118,39 +132,26 @@ class Clock {
   }
 
   // Returns the current BPM tempo.
-    int Tempo() {
-        return uClock.getTempo();
-    }
+  int Tempo() { return uClock.getTempo(); }
 
   // Set the clock tempo to a int between 1 and 400.
-    void SetTempo(int tempo) {
-        return uClock.setTempo(tempo);
-    }
+  void SetTempo(int tempo) { return uClock.setTempo(tempo); }
 
-    // Record an external clock tick received to process external/internal syncronization.
-    void Tick() {
-        uClock.clockMe();
-    }
+  // Record an external clock tick received to process external/internal
+  // syncronization.
+  void Tick() { uClock.clockMe(); }
 
   // Start the internal clock.
-    void Start() {
-        uClock.start();
-    }
+  void Start() { uClock.start(); }
 
   // Stop internal clock clock.
-    void Stop() {
-        uClock.stop();
-    }
+  void Stop() { uClock.stop(); }
 
   // Reset all clock counters to 0.
-    void Reset() {
-        uClock.resetCounters();
-    }
+  void Reset() { uClock.resetCounters(); }
 
   // Returns true if the clock is not running.
-    bool IsPaused() {
-        return uClock.clock_state == uClock.PAUSED;
-    }
+  bool IsPaused() { return uClock.clock_state == uClock.PAUSED; }
 
 private:
   Source source_ = SOURCE_INTERNAL;
@@ -175,17 +176,11 @@ class Clock {
     }
   }
 
-    static void sendMIDIStart() {
-        NeoSerial.write(MIDI_START);
-    }
+  static void sendMIDIStart() { NeoSerial.write(MIDI_START); }
 
-    static void sendMIDIStop() {
-        NeoSerial.write(MIDI_STOP);
-    }
+  static void sendMIDIStop() { NeoSerial.write(MIDI_STOP); }
 
-    static void sendMIDIClock(uint32_t tick) {
-        NeoSerial.write(MIDI_CLOCK);
-    }
+  static void sendMIDIClock(uint32_t tick) { NeoSerial.write(MIDI_CLOCK); }
 };
 
 #endif