From 18ce6569bc795f774b02a80a7a4831cfe83ac8a9 Mon Sep 17 00:00:00 2001
From: DaveHodder67 <dave.hodder@focusrite.com>
Date: Thu, 2 Jul 2015 13:55:39 +0100
Subject: send MIDI clock at 125bpm

---
 src/app.c | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

(limited to 'src/app.c')

diff --git a/src/app.c b/src/app.c
index a5fb790..cdb41cc 100644
--- a/src/app.c
+++ b/src/app.c
@@ -37,6 +37,10 @@
 
 #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);
+	}
 }
 
 //______________________________________________________________________________
-- 
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