send MIDI clock at 125bpm

1 files changed, 31 insertions, 3 deletions

diff --git a/src/app.c b/src/app.c
index a5fb790..cdb41cc 100644
--- a/src/app.c
+++ b/src/app.c
@@ -38,6 +38,10 @@
 #include "app.h"
 
 //______________________________________________________________________________
+//
+// This is where the fun is!  Add your code to the callbacks below to define how
+// your app behaves.
+//______________________________________________________________________________
 
 void app_surface_event(u8 type, u8 index, u8 value)
 {
@@ -60,6 +64,8 @@ void app_surface_event(u8 type, u8 index, u8 value)
         }
 }
 
+//______________________________________________________________________________
+
 void app_midi_event(u8 port, u8 status, u8 d1, u8 d2)
 {
         // example - MIDI interface functionality for USB "MIDI" port -> DIN port
@@ -75,10 +81,15 @@ void app_midi_event(u8 port, u8 status, u8 d1, u8 d2)
         }
 }
 
+//______________________________________________________________________________
+
 void app_sysex_event(u8 port, u8 * data, u16 count)
 {
+        // example - respond to UDI messages?
 }
 
+//______________________________________________________________________________
+
 void app_aftertouch_event(u8 index, u8 value)
 {
     // example - send poly aftertouch to MIDI ports
@@ -87,22 +98,39 @@ void app_aftertouch_event(u8 index, u8 value)
     // example - set LED to white, brightness in proportion to pressure
         hal_plot_led(TYPEPAD, index, value/2, value/2, value/2);
 }
+        
+//______________________________________________________________________________
 
 void app_cable_event(u8 type, u8 value)
 {
-    // example - light the Setup LED to indicate cable connection
+    // example - light the Setup LED to indicate cable connections
         if (type == MIDI_IN_CABLE)
         {
-                hal_plot_led(TYPESETUP, 0, 0, value, 0);
+                hal_plot_led(TYPESETUP, 0, 0, value, 0); // green
         }
         else if (type == MIDI_OUT_CABLE)
         {
-                hal_plot_led(TYPESETUP, 0, value, 0, 0);
+                hal_plot_led(TYPESETUP, 0, value, 0, 0); // red
         }
 }
 
+//______________________________________________________________________________
+
+
 void app_timer_event()
 {
+        // example - send MIDI clock at 125bpm
+        static const int TICK_MS = 20;
+        
+        static u8 ms = TICK_MS;
+        
+        if (++ms >= TICK_MS)
+        {
+                ms = 0;
+                
+                // send a clock pulse up the USB
+                hal_send_midi(USBSTANDALONE, MIDITIMINGCLOCK, 0, 0);
+        }
 }
 
 //______________________________________________________________________________