First commit

module_usb_midi/src/usb_midi.h

@@ -0,0 +1,63 @@
+#ifndef __usb_midi_h__
+#define __usb_midi_h__
+
+
+/** USB MIDI I/O thread.
+ *
+ *  This function passes MIDI data from USB to UART I/O.
+ *
+ *  \param p_midi_in 1-bit input port for MIDI
+ *  \param p_midi_out 1-bit output port for MIDI
+ *  \param clk_midi clock block used for clockin the UART; should have 
+ *                  a rate of 100MHz
+ *  \param c_midi chanend connected to the decouple() thread
+ *  \param cable_number the cable number of the MIDI implementation.
+ *                      This should be set to 0.
+ **/
+void usb_midi(in port ?p_midi_in, out port ?p_midi_out, 
+              clock ?clk_midi,
+              chanend c_midi,
+              unsigned cable_number);
+
+#define MAX_USB_MIDI_PACKET_SIZE 1024
+#define MIDI_USB_BUFFER_FROM_HOST_FIFO_SIZE (512+1024)
+#define MIDI_USB_BUFFER_TO_HOST_SIZE (256)
+#define MIDI_ACK 20
+#define USB_MIDI_DEVICE_OUT_FIFO_SIZE (1024)
+
+#ifdef __MIDI_IMPL
+#define INLINE
+#else
+#define INLINE inline
+#endif
+
+#ifdef NO_INLINE_MIDI_SELECT_HANDLER
+#pragma select handler
+void midi_get_ack_or_data(chanend c, int &is_ack, unsigned int &datum);
+#else
+#pragma select handler
+INLINE void midi_get_ack_or_data(chanend c, int &is_ack, unsigned int &datum) {
+  if (testct(c)) {
+    is_ack = 1;
+    (void) inct(c);
+    (void) inuchar(c);
+    (void) inuchar(c);
+    (void) inuchar(c);
+  }
+  else {
+    is_ack = 0;
+    datum = inuint(c);
+  }
+}
+#endif
+
+
+INLINE void midi_send_ack(chanend c) {
+  outct(c, MIDI_ACK);
+  outuchar(c, 0);
+  outuchar(c, 0);
+  outuchar(c, 0);
+}
+
+
+#endif // __usb_midi_h__