- Fixed drawing of round objects (Circles, Rounded Rects) using a lookup table

- Added function to read out the display_buffer via USB-Serial
 - Added basic structure and files for later complete firmware (still in progress)
 - Added Doc folder with schematic in it
 - Added Python script and batch file to read out the display buffer and open the image in gimp

Firmware/Core1_MIDI_Receiver.c

@@ -0,0 +1,157 @@
+/*
+ * Core1_MIDI_Receiver.c
+ *
+ * Created: Thu Jan 13 2022 15:35:28
+ *  Author Chris
+ */
+// ============================================================================================
+// Includes
+#include "Core1_MIDI_Receiver.h"
+
+#include "UART0.h"
+#include "Command_Definition.h"
+
+#include "pico/time.h"
+
+
+// ============================================================================================
+// Defines
+#define NOTE_UNDEFINED		255
+
+
+// ============================================================================================
+// Variables
+enum PARSING_STATE_e
+{
+	WAITING_FOR_COMMAND,
+	WAITING_FOR_NOTE,
+	WAITING_FOR_VALUE
+};
+
+struct PARSING_s
+{
+	enum PARSING_STATE_e State;
+	uint8_t MIDI_Event;
+	uint8_t MIDI_Channel;
+	uint8_t MIDI_Note;
+};
+
+volatile struct PARSING_s _Parsing;
+
+History_Buffer_t _MIDI_History_Buffer[RECEIVED_MIDI_HISTORY_BUFFER_SIZE];
+
+
+// ============================================================================================
+// Function Declarations
+void Core1_MIDI_Receiver_Histroy_Update				(uint8_t data);
+void Core1_MIDI_Receiver_Issue_Event_On_Off_Received(uint8_t midi_channel, uint8_t midi_event);
+void Core1_MIDI_Receiver_Issue_Data_Received		(uint8_t midi_data);
+void Core1_MIDI_Receiver_Issue_Full_Note_Received	(uint8_t midi_event, uint8_t midi_channel, uint8_t midi_note, uint8_t value);
+
+
+/*******************************************************************
+	Interrupt Service Routines
+*******************************************************************/
+
+
+/*******************************************************************
+	Functions
+*******************************************************************/
+void Core1_MIDI_Receiver_Init(void)
+{
+	UART0_Init();
+
+	for(uint i=0;i<RECEIVED_MIDI_HISTORY_BUFFER_SIZE;i++)
+	{
+		_MIDI_History_Buffer[i].Data 			= HISTORY_ENTRY_UNDEFINED;
+		_MIDI_History_Buffer[i].Timestamp_ms 	= 0;
+	}
+
+	_Parsing.State 			= WAITING_FOR_COMMAND;
+	_Parsing.MIDI_Event 	= MIDI_EVENT_NOTE_ON;
+	_Parsing.MIDI_Channel 	= MIDI_CHANNEL_1;
+	_Parsing.MIDI_Note 		= NOTE_UNDEFINED;
+}
+
+void Core1_MIDI_Receiver_Process(void)
+{
+	while(UART0_Data_Available() > 0)
+	{
+		uint8_t Data = UART0_Get_Byte();
+		Core1_MIDI_Receiver_Histroy_Update(Data);
+
+		switch(_Parsing.State)
+		{
+			case WAITING_FOR_COMMAND:
+				if(MIDI_EVENT_FROM_COMMAND(Data) == MIDI_EVENT_NOTE_ON || MIDI_EVENT_FROM_COMMAND(Data) == MIDI_EVENT_NOTE_OFF)
+				{
+					_Parsing.MIDI_Event 	= MIDI_EVENT_FROM_COMMAND(Data);
+					_Parsing.MIDI_Channel 	= MIDI_CHANNEL_FROM_COMMAND(Data);
+					_Parsing.State 			= WAITING_FOR_NOTE;
+					
+					Core1_MIDI_Receiver_Issue_Event_On_Off_Received(_Parsing.MIDI_Channel, _Parsing.MIDI_Event);
+					break;
+				}
+				
+				Core1_MIDI_Receiver_Issue_Data_Received(Data);
+				break;
+
+			case WAITING_FOR_NOTE:
+				if(IS_MIDI_DATA(Data))
+				{
+					_Parsing.MIDI_Note 	= Data; 
+					_Parsing.State 		= WAITING_FOR_VALUE;
+				}
+				else
+				{
+					// Received another command after just receiving a command. This should not happen, but
+					// in case it does, reset the parsing state machine
+					_Parsing.State = WAITING_FOR_COMMAND;
+				}
+				break;
+
+			case WAITING_FOR_VALUE:
+				if(IS_MIDI_DATA(Data))
+				{
+					Core1_MIDI_Receiver_Issue_Full_Note_Received(_Parsing.MIDI_Event, _Parsing.MIDI_Channel, _Parsing.MIDI_Note, Data);
+				}
+
+				// Reset State Machine and wait for next MIDI Command
+				_Parsing.State = WAITING_FOR_COMMAND;
+				break;
+
+			default:
+				break;
+		}
+	}
+}
+
+
+/*******************************************************************
+	Internal Functions
+*******************************************************************/
+void Core1_MIDI_Receiver_Histroy_Update(uint8_t data)
+{
+	for(uint i=RECEIVED_MIDI_HISTORY_BUFFER_SIZE-1;i>0;i--)
+	{
+		_MIDI_History_Buffer[i] = _MIDI_History_Buffer[i-1];
+	}
+
+	_MIDI_History_Buffer[0].Data 			= data;
+	_MIDI_History_Buffer[0].Timestamp_ms 	= to_ms_since_boot(get_absolute_time());
+}
+
+void Core1_MIDI_Receiver_Issue_Event_On_Off_Received(uint8_t midi_channel, uint8_t midi_event)
+{
+	Core1_Light_Controller_MIDI_OnOff_Event_Received(midi_event, midi_channel);
+}
+
+void Core1_MIDI_Receiver_Issue_Data_Received(uint8_t midi_data)
+{
+	Core1_Light_Controller_MIDI_Other_Event_Received(midi_data);
+}
+
+void Core1_MIDI_Receiver_Issue_Full_Note_Received(uint8_t midi_event, uint8_t midi_channel, uint8_t midi_note, uint8_t value)
+{
+	Core1_Light_Controller_MIDI_Full_Note_Received(midi_event, midi_channel, midi_note, value);
+}