Differences

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--- mcan [2018/08/03 11:40] – [How to use MIOS32_CAN.] antichambre
+++ mcan [2018/08/03 12:53] (current) – [A basic example] antichambre
@@ Line 256: / Line 256: @@
 **But before any MIDI features we need the MIOS32 driver for that CAN controller...**
 ----
-===== MIOS32_CAN implementation =====
+===== MIOS32_CAN =====
 ==== CAN controller as a generic peripheral in MIOS32. ====
 MIOS32_CAN feature is only compilable under STM32F4.\\
@@ Line 395: / Line 395: @@
 ----
-===== MIOS32_CAN_MIDI implementation =====
+===== MIOS32_CAN_MIDI =====
 ==== Package and Packet ====
 Like the others MIDI peripherals, we need a bridge between our new CAN features(mios32_can.c/h) and the MIDI process[[http://www.midibox.org/mios32/manual/group___m_i_o_s32___m_i_d_i.html|(mios32_midi.c/h)]]\\
@@ Line 458: / Line 458: @@
 ----
-==== Basic Mode ====
+===== MCAN Basic Mode =====
 This is the default mode, the funny one, just interconnect some Cores in parallel with J18 and they are able to communicate in MIDI. Easy.\\
 In this mode:
@@ Line 471: / Line 471: @@
 \\
 \\
-=== Standard Packet in Basic Mode ===
+==== Standard Packet in Basic Mode ====
 Even if the MCAN make the MIDI packet for you, let me show you some of them:\\
 The IDE bit in frame is always 0, cause we only use the Standard Id Packet, the Type and the Cable must be placed in the Id.\\
@@ Line 481: / Line 481: @@
 The Sysex messages are an exception for the DLC, we makes packets of 8 bytes(max) with it, and we mark the packets as Starts, Continues or Ends in the Type field, using the code 0x4, 0x6 and 0x7.\\
-**Real-time messages**
+==== Real-time packet messages example ====
 <code c [mios32_midi_pcktype_num_bytes]>
 , // 5: Single-byte system common message
@@ Line 494: / Line 494: @@
 <wrap lo center> an 0xf8 MIDI Clock over the port MCAN2.</wrap>\\
-**Voice messages**
+==== Voice packet messages examples ====
 <code c [mios32_midi_pcktype_num_bytes]>
 , // 8: Note Off
@@ Line 517: / Line 517: @@
 <wrap lo center> Program: 33, on MCAN3/Channel 13.</wrap>\\
-**SysEx messages**
+==== SysEx packets message example ====
 <code c [mios32_midi_pcktype_num_bytes]>
 , // 4: SysEx starts
@@ Line 547: / Line 547: @@
 ----
-==== Basic Mode, declare and use ====
+===== Basic Mode, declare and use =====
 Just add this lines in your mios32_config.h(your app).\\
 <code c [mios32_config.h]>
@@ Line 562: / Line 562: @@
 #define MIOS32_CAN_MIDI_NUM_PORTS 16
 </code>
-<wrap lo>Done! MCAN is ready!</wrap>
+<wrap lo>Done! MCAN is ready!</wrap>\\
-==== Enhanced Mode ====
+==== A basic example ====
+For this example we will use 2 Cores to get an 8 MIDI ports link between 2 different computers.\\
+\\
+<WRAP group>
+<WRAP half column>
+{{:antichambre:mcan_example1.png?400 |}}
+</WRAP>
+<WRAP half column>
+</WRAP>
+</WRAP>
+\\
+\\
+The USB limits the link to 8 MIDI ports. Don't forget to declare it too.\\
+<code c [mios32_config.h]>
+/* the use of CAN Controller must be precised.
+ */
+#define MIOS32_USE_CAN
+/* CAN1 is MCAN must be precised.
+ */
+#define MIOS32_USE_CAN_MIDI
+/* Number MCAN MIDI Ports, default and max is 16
+ */
+#define MIOS32_CAN_MIDI_NUM_PORTS 8
+// enable 8 USB MIDI ports
+#define MIOS32_USB_MIDI_NUM_PORTS 8
+</code>
+\\
+Go in your App code and add this lines in your APP_MIDI_NotifyPackage:\\
+<code c [app.c]>
+/////////////////////////////////////////////////////////////////////////////
+// This hook is called when a MIDI package has been received
+/////////////////////////////////////////////////////////////////////////////
+void APP_MIDI_NotifyPackage(mios32_midi_port_t port, mios32_midi_package_t midi_package)
+{
+  if((port & 0xf0) == MCAN0){
+    // receive the voice messages from MCANx and forward it to the USBx
+    MIOS32_MIDI_SendPackage(USB0 + (port & 0x0f), midi_package);
+  }else if((port & 0xf0) == USB0){
+    // filter for voice messages from USBx
+    if(midi_package.type >= 0x8 && midi_package.type <= 0xe){
+      // forward the voice messages to MCANx
+      MIOS32_MIDI_SendPackage(MCAN0 + (port & 0x0f), midi_package);
+    }
+  }
+}
+</code>\\
+\\
+**Done! Your App with the MCAN(Basic) is ready to upload and is the same for both Cores. 8-) **
+\\
+\\
+\\
+----
+===== MCAN Enhanced Mode =====
 <WRAP center round todo 60%>