From a68ffdd6c327bcc5d0c0524c4dacd6ceeaf839d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joachim=20Stro=CC=88mbergson?= <joachim@secworks.se>
Date: Sat, 31 Jan 2015 09:03:06 +0100
Subject: Adding all main hw source files and constraints.

---
 rtl/src/testbench/tb_demo_adder.v | 173 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 rtl/src/testbench/tb_demo_adder.v

(limited to 'rtl/src/testbench')

diff --git a/rtl/src/testbench/tb_demo_adder.v b/rtl/src/testbench/tb_demo_adder.v
new file mode 100644
index 0000000..5abbf06
--- /dev/null
+++ b/rtl/src/testbench/tb_demo_adder.v
@@ -0,0 +1,173 @@
+`timescale 1ns / 1ps
+
+module tb_demo_adder;
+
+		//
+		// Inputs
+		//
+	reg	gclk;
+	wire	gclk_p	=  gclk;
+	wire	gclk_n	= ~gclk;
+	reg	reset_mcu_b;
+
+		//
+		// Outputs
+		//
+	wire	led;
+
+		//
+		// EIM
+		//
+	reg				eim_cs_n;
+	reg				eim_bclk;
+	reg				eim_lba_n;
+	wire	[15: 0]	eim_da;
+	reg	[15: 0]	eim_da_out;
+	reg				eim_da_drive;
+	reg				eim_oe_n;
+	reg				eim_wr_n;
+	wire				eim_wait_n;
+	
+	assign eim_da = (eim_da_drive == 1'b1) ? eim_da_out : {16{1'bZ}};
+
+		//
+		// UUT
+		//
+	novena_baseline_top uut
+	(
+		.gclk_p_pin			(gclk_p), 
+		.gclk_n_pin			(gclk_n), 
+		
+		.eim_bclk			(eim_bclk),
+		.eim_cs0_n			(eim_cs_n),
+		.eim_da				(eim_da),
+		.eim_lba_n			(eim_lba_n),
+		.eim_wr_n			(eim_wr_n),
+		.eim_oe_n			(eim_oe_n),
+		.eim_wait_n			(eim_wait_n),
+		
+		.reset_mcu_b_pin	(reset_mcu_b),
+		
+		.led_pin				(led_pin),
+		.apoptosis_pin		(apoptosis_pin)
+	);
+
+		//
+		// CLK2 (50 MHz)
+		//
+	always #10 gclk = ~gclk;		
+		
+		//
+		// Initialize EIM
+		//
+	initial begin
+		eim_cs_n			= 1'b1;
+		eim_bclk			= 1'b0;
+		eim_lba_n		= 1'b1;
+		eim_da_out		= {16{1'bX}};
+		eim_da_drive	= 1'b1;
+		eim_oe_n			= 1'b1;
+		eim_wr_n			= 1'b1;
+	end
+		
+		//
+		// Test Logic
+		//
+	reg	[31: 0]	eim_rd = {32{1'bX}};
+	
+	initial begin
+		gclk				= 1'b0;
+		reset_mcu_b		= 1'b1;
+		//
+		#2000;
+		//
+		eim_write({12'h321, 2'd0, 2'b00}, 32'hAA_55_A5_A5);	// write X
+		#100;
+		eim_write({12'h321, 2'd1, 2'b00}, 32'h11_22_12_12);	// write Y
+		#100;
+		eim_read( {12'h321, 2'd3, 2'b00}, eim_rd);				// read {STS, CTL}	<-- should be 0x0000_0000
+		#100;
+		eim_rd = eim_rd + 1'b1;
+		eim_write({12'h321, 2'd3, 2'b00}, eim_rd);				// write {STS, CTL}	<-- STS is ignored by adder
+		#100;
+		eim_read( {12'h321, 2'd3, 2'b00}, eim_rd);				// read {STS, CTL}	<-- should be 0x0001_0001
+		#100;
+		eim_read( {12'h321, 2'd2, 2'b00}, eim_rd);				// read Z				<-- should be 0xBB77B7B7
+	end	
+		
+		//
+		// Write Access
+		//
+	integer wr;
+	task eim_write;
+		input [15: 0] addr;
+		input [31: 0] data;
+		begin
+			#15	eim_cs_n		= 1'b0;
+					eim_lba_n	= 1'b0;
+					eim_da_out	= addr;
+					eim_wr_n		= 1'b0;
+			#15	eim_bclk		= 1'b1;
+			#15	eim_bclk		= 1'b0;
+					eim_lba_n	= 1'b1;
+					eim_da_out	= data[15:0];
+			#15	eim_bclk		= 1'b1;
+			#15	eim_bclk		= 1'b0;
+					eim_da_out	= data[31:16];
+			#15	eim_bclk		= 1'b1;
+			#15	eim_bclk		= 1'b0;
+					eim_da_out	= {16{1'bX}};
+			while (eim_wait_n == 1'b0) begin
+			#15	eim_bclk		= 1'b1;
+			#15	eim_bclk		= 1'b0;
+			end					
+			#15	eim_cs_n		= 1'b1;
+					eim_wr_n		= 1'b1;
+			#30;
+		end
+	endtask;
+	
+	
+		//
+		// Read Access
+		//
+	task eim_read;
+		input  [15: 0] addr;
+		output [31: 0] data;
+		begin
+			#15	eim_cs_n			= 1'b0;
+					eim_lba_n		= 1'b0;
+					eim_da_out		= addr;
+					
+			#15	eim_bclk			= 1'b1;
+			
+			#15	eim_bclk			= 1'b0;
+					eim_lba_n		= 1'b1;
+					eim_oe_n			= 1'b0;
+					eim_da_drive	= 1'b0;
+			#15;
+			while (eim_wait_n == 1'b0) begin
+					eim_bclk		= 1'b1;
+			#15	eim_bclk		= 1'b0;
+			#15;
+			end
+					eim_bclk			= 1'b1;
+			#15	eim_bclk			= 1'b0;
+			#15	eim_bclk			= 1'b1;
+					data[15: 0]		= eim_da;
+			#15	eim_bclk			= 1'b0;
+			#15	eim_bclk			= 1'b1;
+					data[31:16]		= eim_da;
+			#15	eim_bclk			= 1'b0;
+					eim_da_out		= {16{1'bX}};
+
+			#15	eim_cs_n			= 1'b1;
+					eim_oe_n			= 1'b1;
+					eim_da_drive	= 1'b1;
+			#30;
+		end
+	endtask;	
+
+      
+endmodule
+
-- 
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