Update STM32UartMasterMidiClock.ino

Working MIDI out tested on Nucleo-F401RE and Nucleo-F072RB boards

examples/STM32UartMasterMidiClock/STM32UartMasterMidiClock.ino

@@ -1,12 +1,19 @@
-/* Uart MIDI Sync Box
+/* Uart MIDI out
  *  
  * This example demonstrates how to send MIDI data via Uart 
  * interface on STM32 family. 
  * 
  * This example code is in the public domain.
+ *
+ * Requires STM32Duino board manager to be installed.
  * 
- * ...
- * 
+ * Define HardwareSerial using any available UART/USART. 
+ * Nucleo boards have UART/USART pins that are used by the ST-LINK interface (unless using solder bridging).
+ *
+ * Tested on Nucleo-F401RE and Nucleo-F072RB (PA9=D8 PA10=D2 on the Arduino pins)
+ *
+ * Code by midilab contact@midilab.co
+ * Example modified by Jackson Devices contact@jacksondevices.com
  */
 #include <uClock.h>
 
@@ -15,8 +22,7 @@
 #define MIDI_START 0xFA
 #define MIDI_STOP  0xFC
 
-// the blue led
-#define LED_BUILTIN    2
+HardwareSerial Serial1(PA10, PA9);
 
 uint8_t bpm_blink_timer = 1;
 void handle_bpm_led(uint32_t tick)
@@ -35,24 +41,26 @@ void handle_bpm_led(uint32_t tick)
 
 // Internal clock handlers
 void ClockOut96PPQN(uint32_t tick) {
-  // Send MIDI_CLOCK to external gears
-  //Serial.write(MIDI_CLOCK);
+  // Send MIDI_CLOCK to external gear
+  Serial1.write(MIDI_CLOCK);
   handle_bpm_led(tick);
 }
 
 void onClockStart() {
-  //Serial.write(MIDI_START);
+    // Send MIDI_START to external gear
+  Serial1.write(MIDI_START);
 }
 
 void onClockStop() {
-  //Serial.write(MIDI_STOP);
+    // Send MIDI_STOP to external gear
+  Serial1.write(MIDI_STOP);
 }
 
 void setup() {
-  // Initialize serial communication at 31250 bits per second, the default MIDI serial speed communication:
-  //Serial.begin(31250);
+  // Initialize Serial1 communication at 31250 bits per second, the default MIDI Serial1 speed communication:
+  Serial1.begin(31250);
 
-  // A led to count bpms
+  // An led to display BPM
   pinMode(LED_BUILTIN, OUTPUT);
   
   // Setup our clock system
@@ -64,7 +72,7 @@ void setup() {
   uClock.setOnClockStartOutput(onClockStart);  
   uClock.setOnClockStopOutput(onClockStop);
   // Set the clock BPM to 126 BPM
-  uClock.setTempo(126);
+  uClock.setTempo(120);
   // Starts the clock, tick-tac-tick-tac...
   uClock.start();
 }