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top_level.sv

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+// Definition of top level
+module top(led_if.led_port_top l, dip_if.dip_port_top d, fram_if.fram_port_top f, clock_if.clock_port_top c);
+	
+	// Initialisation of bus
+	bus fpga_bus();
+		
+	// Initialisation of modules
+	timer t(fpga_bus, c);
+	steuerung st(fpga_bus, l); 
+	spi s(fpga_bus, f);
+	parallelport p(fpga_bus, d);
+endmodule : top
+
+// Definition of bus interface
+interface bus();
+	// bus wires
+	logic clk; // clock
+	logic timer;
+	logic [3:0]dip;
+	logic [1:0]spi_read;
+	
+	// modports from modules pov
+	modport timer_port(input dip, output timer, clk);		//dip[0]
+	modport parallel_port(output dip);
+	modport steuerung_port(input dip, timer, spi_read);		//dip[3:0] / spi_read[1:0]
+	modport spi_port(input dip, timer, output spi_read);	//spi_read[1:0]
+endinterface : bus
+
+// Definition of parallelport
+module parallelport(bus.parallel_port b, dip_if.dip_port_top d);
+	//b.dip <= d.dip;	
+endmodule
+
+module spi(bus.spi_port b, fram_if.fram_port_top i);
+	/*...
+	b.dip[3:0], b.timer, b.spi_read[1:0]
+	i.ss, i.mosi, i.miso, i.sclk
+	...*/
+endmodule
+
+module timer(bus.timer_port b, clock_if.clock_port_top i);
+	/*...
+	b.clk, b.dip[0], b.timer
+	i.clk
+	...*/
+endmodule
+
+module steuerung(bus.steuerung_port b, led_if.led_port_top i);
+	/*...
+	b.dip[3:0], b.timer, b.spi_read[1:0]
+	i.rgb[2:0]
+	...*/
+endmodule
+
+/*   
+_______________________________________________________________________________________________________________
+Testbench
+					__________________										 		___________________
+				   |				  |												|				    |
+				   |   DIP-Schalter	  |												|	FRAM-Speicher   |
+				   |				  |												|				    |
+				   |__________________|												|___________________|
+							|																 |
+____________________________|________________________________________________________________|_________________
+Toplevel					|																 |
+							|																 |
+				 dip[3:0]-->|																 |<--mosi, miso, sclk, ss
+							|												  				 |
+					________|_________											     ________|__________
+				   |				  |												|				    |
+				   |   Parallelport	  |												| SPI-Schnittstelle |
+				   |				  |												| & FRAM-Kontroller	|
+				   |__________________|												|___________________|
+							|																 |
+							|																 |
+				 dip[3:0]-->|																 |<--dip[3:0], timer, spi_read[1:0]
+							|																 |
+							|																 |
+							---------------------------------------------------------------------BUS
+							|																 |
+							|																 |
+       dip[0], clk, timer-->|																 |<--dip[3:0], timer, spi_read[1:0]
+							|																 |
+					________|_________			___________________			     	 ________|__________
+				   |				  |		   |				   |				|				    |
+				   |      Timer		  |		   |  Oszillator-Takt  |				|  Ampel-Steuerung  |
+				   |				  |		   |    (auf Board)	   |				|				    |
+				   |__________________|		   |___________________|				|___________________|
+							|	                         |                                   |
+							|							 |									 |
+				 	  clk-->------------------------------									 |<--rgb[2:0]
+							|																 |
+____________________________|________________________________________________________________|___________________
+							|																 |
+				 	________|_________										 		 ________|__________
+				   |				  |												|				    |
+				   |       Takt		  |												|	   RGB-LED		|
+				   |  (der Testbench) |												|				    |
+				   |__________________|												|___________________|
+
+
+__________________________________________________________________________________________________________________
+
+*/
+
+
+
+
+