- 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/Command.c

@@ -0,0 +1,157 @@
+/*
+ * Command.c
+ *
+ * Created: Thu Oct 13 2022 16:37:17
+ *  Author Chris
+ */
+// ============================================================================================
+// Includes
+#include "Command.h"
+
+#include "pico/stdlib.h"
+#include "pico/multicore.h"
+#include "hardware/irq.h"
+
+
+// ============================================================================================
+// Defines
+#define COMMAND_BUFFER_SIZE			16
+#define INVALID						-1
+
+
+// ============================================================================================
+// Variables
+static Command_u	_Command_Buffer[COMMAND_BUFFER_SIZE];
+
+
+// ============================================================================================
+// Function Declarations
+void Command_Send_Multicore_Command(uint8_t command, uint8_t parameter, uint16_t value);
+void Command_Add_Multicore_Command_To_Buffer(uint command);
+
+
+/*******************************************************************
+	Interrupt Service Routines
+*******************************************************************/
+void ISR_MULTICORE_READ()
+{
+    uint32_t Multicore_Data;
+
+	// Just record the latest entry
+    while(multicore_fifo_rvalid())
+	{
+        Multicore_Data = multicore_fifo_pop_blocking();
+		Command_Add_Multicore_Command_To_Buffer(Multicore_Data);
+	}	
+
+    multicore_fifo_clear_irq();
+}
+
+
+/*******************************************************************
+	Functions
+*******************************************************************/
+void Command_Init()
+{
+	for(uint i=0;i<COMMAND_BUFFER_SIZE;i++)
+	{
+		_Command_Buffer[i].Data = MULTICORE_COMMAND_EMPTY;
+	}
+
+	irq_set_exclusive_handler(SIO_FIFO_IRQ_NUM(0), ISR_MULTICORE_READ);
+    irq_set_enabled(SIO_FIFO_IRQ_NUM(0), true);
+}
+
+void Command_Issue_Get_Request(uint8_t command, uint8_t parameter)
+{
+	Command_Send_Multicore_Command(command, parameter, 0);
+}
+
+void Command_Issue_Set_Request(uint8_t command, uint8_t parameter, uint16_t value)
+{
+	Command_Send_Multicore_Command(command, parameter, value);
+}
+
+int Command_Get_Request_Response_By_Command_Only(uint8_t command, int timeout_us)
+{
+	int Return_Value = INVALID;
+	
+	uint64_t Timeout_Time_us = to_us_since_boot(get_absolute_time()) + timeout_us;
+
+	do
+	{
+		for(uint i=0;i<COMMAND_BUFFER_SIZE;i++)
+		{
+			if(_Command_Buffer[i].Fields.Command == command)
+			{
+				Return_Value = _Command_Buffer[i].Fields.Value;
+				_Command_Buffer[i].Data = MULTICORE_COMMAND_EMPTY;
+			}
+		}
+	} while (Return_Value == INVALID && Timeout_Time_us > to_us_since_boot(get_absolute_time()));
+
+	return Return_Value;
+}
+
+int Command_Get_Request_Response_By_Command_And_Parameter(uint8_t command, uint8_t parameter, int timeout_us)
+{
+	int Return_Value = INVALID;
+	
+	uint64_t Timeout_Time_us = to_us_since_boot(get_absolute_time()) + timeout_us;
+
+	do
+	{
+		for(uint i=0;i<COMMAND_BUFFER_SIZE;i++)
+		{
+			if(_Command_Buffer[i].Fields.Command == command && _Command_Buffer[i].Fields.Parameter == parameter)
+			{
+				Return_Value = _Command_Buffer[i].Fields.Value;
+				_Command_Buffer[i].Data = MULTICORE_COMMAND_EMPTY;
+			}
+		}
+	} while (Return_Value == INVALID && Timeout_Time_us > to_us_since_boot(get_absolute_time()));
+	
+	return Return_Value;
+}
+
+uint Command_Get_Request_Response_Buffer_Fill_Count()
+{
+	uint Fill_Count = 0;
+
+	for(uint i=0;i<COMMAND_BUFFER_SIZE;i++)
+	{
+		if(_Command_Buffer[i].Fields.Command != MULTICORE_COMMAND_EMPTY)
+		{
+			Fill_Count++;
+		}
+	}
+
+	return Fill_Count;
+}
+
+
+/*******************************************************************
+	Internal Functions
+*******************************************************************/
+void Command_Send_Multicore_Command(uint8_t command, uint8_t parameter, uint16_t value)
+{
+	Command_u Command;
+	Command.Fields.Command 		= command;
+	Command.Fields.Parameter 	= parameter;
+	Command.Fields.Value		= value;
+
+	multicore_fifo_push_blocking(Command.Data);
+}
+
+void Command_Add_Multicore_Command_To_Buffer(uint command)
+{
+	for(uint i=0;i<COMMAND_BUFFER_SIZE;i++)
+	{
+		if(_Command_Buffer[i].Fields.Command == MULTICORE_COMMAND_EMPTY)
+		{
+			_Command_Buffer[i].Data = command;
+			return;
+		}
+	}
+}
+