////////////////////////////////////////////////////////////////////////////
// SPDX-FileCopyrightText:  2021 , Dinesh Annayya
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
// SPDX-FileContributor: Modified by Dinesh Annayya <dinesha@opencores.org>
//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Standalone User validation Test bench                       ////
////                                                              ////
////  This file is part of the YIFive cores project               ////
////  https://github.com/dineshannayya/yifive_r0.git              ////
////  http://www.opencores.org/cores/yifive/                      ////
////                                                              ////
////  Description                                                 ////
////   This is a standalone test bench to validate the            ////
////   gpio interfaface through External WB i/F.                  ////
////      1.gpio posedge & negedge interrupt generation           ////
////      2.gpio as input and output                              ////
////                                                              ////
////  To Do:                                                      ////
////    nothing                                                   ////
////                                                              ////
////  Author(s):                                                  ////
////      - Dinesh Annayya, dinesha@opencores.org                 ////
////                                                              ////
////  Revision :                                                  ////
////    0.1 - 01 Oct 2021, Dinesh A                               ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
////                                                              ////
//// This source file may be used and distributed without         ////
//// restriction provided that this copyright statement is not    ////
//// removed from the file and that any derivative work contains  ////
//// the original copyright notice and the associated disclaimer. ////
////                                                              ////
//// This source file is free software; you can redistribute it   ////
//// and/or modify it under the terms of the GNU Lesser General   ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// This source is distributed in the hope that it will be       ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
//// PURPOSE.  See the GNU Lesser General Public License for more ////
//// details.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////

`default_nettype wire

`timescale 1 ns/1 ps

`include "sram_macros/sky130_sram_2kbyte_1rw1r_32x512_8.v"
`include "is62wvs1288.v"

`define TB_GLBL user_gpio_tb

module user_gpio_tb;
	reg clock;
	reg wb_rst_i;
	reg power1, power2;
	reg power3, power4;

        reg        wbd_ext_cyc_i;  // strobe/request
        reg        wbd_ext_stb_i;  // strobe/request
        reg [31:0] wbd_ext_adr_i;  // address
        reg        wbd_ext_we_i;  // write
        reg [31:0] wbd_ext_dat_i;  // data output
        reg [3:0]  wbd_ext_sel_i;  // byte enable

        wire [31:0] wbd_ext_dat_o;  // data input
        wire        wbd_ext_ack_o;  // acknowlegement
        wire        wbd_ext_err_o;  // error

	// User I/O
	wire [37:0] io_oeb;
	wire [37:0] io_out;
	wire [37:0] io_in;


	reg [1:0] spi_chip_no;

	wire gpio;
	wire [37:0] mprj_io;
	wire [7:0] mprj_io_0;
	reg        test_fail;
	reg [31:0] read_data;
        integer    test_step;
        wire       clock_mon;


	// External clock is used by default.  Make this artificially fast for the
	// simulation.  Normally this would be a slow clock and the digital PLL
	// would be the fast clock.

	always #12.5 clock <= (clock === 1'b0);


     /************* Port-A Mapping **********************************
     *   ********************************************************/

     reg  [7:0]  port_a_out;
     wire [7:0]  port_a_in = 8'h0;

     /************* Port-B Mapping **********************************
     *   Pin-14       PB0/CLKO/ICP1             digital_io[11]
     *   Pin-15       PB1/SS[1]OC1A(PWM3)       digital_io[12]
     *   Pin-16       PB2/SS[0]/OC1B(PWM4)      digital_io[13]
     *   Pin-17       PB3/MOSI/OC2A(PWM5)       digital_io[14]
     *   Pin-18       PB4/MISO                  digital_io[15]
     *   Pin-19       PB5/SCK                   digital_io[16]
     *   Pin-9        PB6/XTAL1/TOSC1           digital_io[6]
     *   Pin-10       PB7/XTAL2/TOSC2           digital_io[7]
     *   ********************************************************/

     reg  [7:0]  port_b_out;
     wire [7:0]  port_b_in = {   io_out[7],
		                 io_out[6],
		                 io_out[16],
		                 io_out[15],
			         io_out[14],
			         io_out[13],
		                 io_out[12],
		                 io_out[11]
			     };
     
     assign {   io_in[7],
		io_in[6],
		io_in[16],
		io_in[15],
		io_in[14],
		io_in[13],
		io_in[12],
		io_in[11]
		} = port_b_out;

     /************* Port-C Mapping **********************************
     *   Pin-1        PC6/RESET*          digital_io[0]
     *   Pin-23       PC0/ADC0            digital_io[18]/analog_io[11]
     *   Pin-24       PC1/ADC1            digital_io[19]/analog_io[12]
     *   Pin-25       PC2/ADC2            digital_io[20]/analog_io[13]
     *   Pin-26       PC3/ADC3            digital_io[21]/analog_io[14]
     *   Pin-27       PC4/ADC4/SDA        digital_io[22]/analog_io[15]
     *   Pin-28       PC5/ADC5/SCL        digital_io[23]/analog_io[16]
     *   ********************************************************/

     reg  [7:0]  port_c_out;
     wire [7:0]  port_c_in = {   1'b0,
		             io_out[0],
		             io_out[23],
		             io_out[22],
			     io_out[21],
			     io_out[20],
		             io_out[19],
		             io_out[18]
			     };
      assign {  io_in[0],
	        io_in[23],
	        io_in[22],
	        io_in[21],
	        io_in[20],
	        io_in[19],
	        io_in[18]
	        } = port_c_out[6:0];


     /************* Port-D Mapping **********************************
      *   Pin-2        PD0/RXD[0]                digital_io[1]
      *   Pin-3        PD1/TXD[0]                digital_io[2]
      *   Pin-4        PD2/RXD[1]/INT0           digital_io[3]
      *   Pin-5        PD3/INT1/OC2B(PWM0)       digital_io[4]
      *   Pin-6        PD4/TXD[1]                digital_io[5]
      *   Pin-11       PD5/SS[3]/OC0B(PWM1)/T1   digital_io[8]
      *   Pin-12       PD6/SS[2]/OC0A(PWM2)/AIN0 digital_io[9]/analog_io[2]
      *   Pin-13       PD7/A1N1                  digital_io[10]/analog_io[3]
      *   ********************************************************/

     reg  [7:0]  port_d_out;
     wire [7:0]  port_d_in = {  io_out[10],
		                io_out[9],
		                io_out[8],
		                io_out[5],
			        io_out[4],
			        io_out[3],
		                io_out[2],
		                io_out[1]
			        };

	assign {  io_in[10],
		  io_in[9],
		  io_in[8],
		  io_in[5],
		  io_in[4],
		  io_in[3],
		  io_in[2],
		  io_in[1]
		}  =  port_d_out;


	/*****************************/

	wire [15:0] irq_lines = u_top.u_pinmux.u_pinmux_reg.irq_lines;

	initial begin
		clock = 0;
                wbd_ext_cyc_i ='h0;  // strobe/request
                wbd_ext_stb_i ='h0;  // strobe/request
                wbd_ext_adr_i ='h0;  // address
                wbd_ext_we_i  ='h0;  // write
                wbd_ext_dat_i ='h0;  // data output
                wbd_ext_sel_i ='h0;  // byte enable
	end

	`ifdef WFDUMP
	   initial begin
	   	$dumpfile("simx.vcd");
	   	$dumpvars(1, `TB_GLBL);
	   	$dumpvars(0, `TB_GLBL.u_top.u_wb_host);
	   	$dumpvars(0, `TB_GLBL.u_top.u_intercon);
	   	$dumpvars(0, `TB_GLBL.u_top.u_pinmux);
	   end
       `endif

	initial begin
		test_fail = 0;

		#200; // Wait for reset removal
	        repeat (10) @(posedge clock);
		$display("Monitor: Standalone User Risc Boot Test Started");


	        repeat (2) @(posedge clock);
		#1;
                wb_user_core_write(`ADDR_SPACE_WBHOST+`WBHOST_GLBL_CFG,'h1);

                // Disable Multi func
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_MULTI_FUNC,'h000);

		/************* GPIO As Output ******************/
		$display("#####################################");
		$display("Step-1: Testing GPIO As Output ");
		// Set the Direction as Output
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_DSEL,'hFFFFFFFF);
		// Set the GPIO Output data: 0x55555555
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_ODATA,'h55555555);
		cmp_gpio_output(8'h55,8'h55,8'h55,8'h55);

		// Set the GPIO Output data: 0xAAAAAAAA
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_ODATA,'hAAAAAAAA);
		cmp_gpio_output(8'hAA,8'hAA,8'hAA,8'hAA);

		// Set the GPIO Output data: 0x5A5A5A5A5A5A
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_ODATA,'h5A5A5A5A);
		cmp_gpio_output(8'h5A,8'h5A,8'h5A,8'h5A);
		
		// Set the GPIO Output data: 0xA5A5A5A5A5A5
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_ODATA,'hA5A5A5A5);
		cmp_gpio_output(8'hA5,8'hA5,8'hA5,8'hA5);

		/************* GPIO As Input ******************/
		$display("#####################################");
		$display("Step-2: Testing GPIO As Input ");
		// Set the Direction as Input
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_DSEL,'h00000000);

		cmp_gpio_input(8'h55,8'h55,8'h55,8'h55);
		cmp_gpio_input(8'hAA,8'hAA,8'hAA,8'hAA);
		cmp_gpio_input(8'h5A,8'h5A,8'h5A,8'h5A);
		cmp_gpio_input(8'hA5,8'hA5,8'hA5,8'hA5);

		/************* GPIO As Input & GPIO Pos edge Interrupt ******************/
		$display("#####################################");
		$display("Step-3: Testing GPIO As Posedge Interrupt ");
		// Set the Direction as Input
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_DSEL,'h00000000);
		// Set GPIO for posedge Interrupt
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_MASK,'hFFFFFFFF);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_POS_INTR,'hFFFFFFFF);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_NEG_INTR,'h00000000);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR_MSK,'hFFFF);
		
		// Drive GPIO with 0x55
		cmp_gpio_pos_intr(8'h55,8'h55,8'h55,8'h55);
		
		// Drive GPIO with 0xAA
		cmp_gpio_pos_intr(8'hAA,8'hAA,8'hAA,8'hAA);
		
		// Drive GPIO with 0x5A
		cmp_gpio_pos_intr(8'h5A,8'h5A,8'h5A,8'h5A);
		
		// Drive GPIO with 0xA5
		cmp_gpio_pos_intr(8'hA5,8'hA5,8'hA5,8'hA5);

	        repeat (200) @(posedge clock);
		/************* GPIO As Input & GPIO NEG edge Interrupt ******************/
		$display("#####################################");
		$display("Step-3: Testing GPIO As Negedge Interrupt ");
		// Set the Direction as Input
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_DSEL,'h00000000);
		// Set GPIO for negedge Interrupt
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_MASK,'hFFFFFFFF);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_POS_INTR,'h00000000);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_NEG_INTR,'hFFFFFFFF);
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR_MSK,'hFFFF);
		
		// Drive GPIO with 0x55
		cmp_gpio_neg_intr(8'h55,8'h55,8'h55,8'h55);
		
		// Drive GPIO with 0xAA
		cmp_gpio_neg_intr(8'hAA,8'hAA,8'hAA,8'hAA);
		
		// Drive GPIO with 0x5A
		cmp_gpio_neg_intr(8'h5A,8'h5A,8'h5A,8'h5A);
		
		// Drive GPIO with 0xA5
		cmp_gpio_neg_intr(8'hA5,8'hA5,8'hA5,8'hA5);

	        repeat (200) @(posedge clock);


		repeat (100) @(posedge clock);
			// $display("+1000 cycles");

          	if(test_fail == 0) begin
		   `ifdef GL
	    	       $display("Monitor: GPIO Mode (GL) Passed");
		   `else
		       $display("Monitor: GPIO Mode (RTL) Passed");
		   `endif
	        end else begin
		    `ifdef GL
	    	        $display("Monitor: GPIO Mode (GL) Failed");
		    `else
		        $display("Monitor: GPIO Mode (RTL) Failed");
		    `endif
		 end
	    	$display("###################################################");
	        $finish;
	end

	initial begin
		wb_rst_i  = 1'b1;
		#100;
		wb_rst_i  = 1'b0;	    	// Release reset
	end
wire USER_VDD1V8 = 1'b1;
wire VSS = 1'b0;


user_project_wrapper u_top(
`ifdef USE_POWER_PINS
    .vccd1(USER_VDD1V8),	// User area 1 1.8V supply
    .vssd1(VSS),	// User area 1 digital ground
`endif
    .wb_clk_i        (clock),  // System clock
    .user_clock2     (1'b1),  // Real-time clock
    .wb_rst_i        (wb_rst_i),  // Regular Reset signal

    .wbs_cyc_i   (wbd_ext_cyc_i),  // strobe/request
    .wbs_stb_i   (wbd_ext_stb_i),  // strobe/request
    .wbs_adr_i   (wbd_ext_adr_i),  // address
    .wbs_we_i    (wbd_ext_we_i),  // write
    .wbs_dat_i   (wbd_ext_dat_i),  // data output
    .wbs_sel_i   (wbd_ext_sel_i),  // byte enable

    .wbs_dat_o   (wbd_ext_dat_o),  // data input
    .wbs_ack_o   (wbd_ext_ack_o),  // acknowlegement

 
    // Logic Analyzer Signals
    .la_data_in      ('1) ,
    .la_data_out     (),
    .la_oenb         ('0),
 

    // IOs
    .io_in          (io_in)  ,
    .io_out         (io_out) ,
    .io_oeb         (io_oeb) ,

    .user_irq       () 

);

`ifndef GL // Drive Power for Hold Fix Buf
    // All standard cell need power hook-up for functionality work
    initial begin

    end
`endif    

//------------------------------------------------------
//  Integrate the Serial flash with qurd support to
//  user core using the gpio pads
//  ----------------------------------------------------
   wire flash_io1;
   wire flash_clk = io_out[16];
   wire spiram_csb = io_out[13];
   tri  #1 flash_io0 = io_out[15];
   assign io_in[14] = flash_io1;

   tri  #1 flash_io2 = 1'b1;
   tri  #1 flash_io3 = 1'b1;


   is62wvs1288 #(.mem_file_name("flash1.hex"))
	u_sfram (
         // Data Inputs/Outputs
           .io0     (flash_io0),
           .io1     (flash_io1),
           // Controls
           .clk    (flash_clk),
           .csb    (spiram_csb),
           .io2    (flash_io2),
           .io3    (flash_io3)
    );


//----------------------------------------------------
//  Task
// --------------------------------------------------
task test_err;
begin
     test_fail = 1;
end
endtask


/***************************
* Check the GPIO Output
* **************************/

task cmp_gpio_output;
input [7:0] exp_port_a;
input [7:0] exp_port_b;
input [7:0] exp_port_c;
input [7:0] exp_port_d;
begin
    // Wait for some cycle to reg to be written through wbbone host
    repeat (20) @(posedge clock); 

    if((exp_port_a & 8'h00) != (port_a_in & 8'h00))
    begin
       $display("ERROR: PORT A Exp: %x  Rxd: %x",exp_port_a & 8'h00,port_a_in & 8'h00);
       `TB_GLBL.test_fail = 1;
    end else begin
       $display("STATYS: PORT A Data: %x Matched  ",port_a_in & 8'h00);
    end
    
    if((exp_port_b & 8'hFF) != (port_b_in & 8'hFF))
    begin
       $display("ERROR: PORT B Exp: %x  Rxd: %x",exp_port_b & 8'hFF,port_b_in & 8'hFF);
       `TB_GLBL.test_fail = 1;
    end else begin
       $display("STATYS: PORT B Data: %x Matched  ",port_b_in & 8'hFF);
    end
    
    if((exp_port_c & 8'h7F) != (port_c_in & 8'h7F))
    begin
       $display("ERROR: PORT C Exp: %x  Rxd: %x",exp_port_c & 8'h7F,port_c_in & 8'h7F);
       `TB_GLBL.test_fail = 1;
    end else begin
       $display("STATYS: PORT C Data: %x Matched  ",port_c_in & 8'h7F);
    end

    if((exp_port_d & 8'hFF) != (port_d_in & 8'hFF))
    begin
       $display("ERROR: PORT D Exp: %x  Rxd: %x",exp_port_d & 8'hFF,port_d_in & 8'hFF);
       `TB_GLBL.test_fail = 1;
    end else begin
       $display("STATYS: PORT D Data: %x Matched  ",port_d_in & 8'hFF);
    end
end
endtask

/***************************
* Check the GPIO input
* **************************/

task cmp_gpio_input;
input [7:0] port_a;
input [7:0] port_b;
input [7:0] port_c;
input [7:0] port_d;
begin
    port_a_out  = port_a;
    port_b_out  = port_b;
    port_c_out  = port_c;
    port_d_out  = port_d;

    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_IDATA,read_data,{port_d,port_c & 8'h7F,port_b,8'h0});
end
endtask


// Check for posedge Interrupt
task cmp_gpio_pos_intr;
input [7:0] port_a;
input [7:0] port_b;
input [7:0] port_c;
input [7:0] port_d;
begin

   // Drive GPIO with zero
    cmp_gpio_input(8'h00,8'h00,8'h00,8'h00);

    // Clear Global Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,'h00008000);

   // Clear all the Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_CLR,'hFFFFFFFF);

    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,32'h0);

    // Drive Ports
    cmp_gpio_input(port_d,port_c,port_b,port_a);


    // Wait for Edge Detection
    repeat (20) @(posedge clock); 

   // Drive GPIO with zero
    cmp_gpio_input(8'h00,8'h00,8'h00,8'h00);

    // Wait for Edge Detection
    repeat (20) @(posedge clock); 

    // Check the GPIO Interrupt
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,{port_d,port_c & 8'h7F,port_b,8'h0});
    
    // Check The Global Interrupt
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,read_data,32'h8000);
    
    if(irq_lines[15] != 1'b1) begin
	$display("ERROR: Global GPIO Interrupt not detected");
       `TB_GLBL.test_fail = 1;
    end

    // Clear The GPIO Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_CLR,32'hFFFFFFFF);

    // Clear GPIO Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,'h8000);


    // Check Interrupt are cleared
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,read_data,32'h0);
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,32'h0);
    if(irq_lines[15] != 1'b0) begin
	$display("ERROR: Global GPIO Interrupt is not cleared");
       `TB_GLBL.test_fail = 1;
    end

end
endtask

// Check for negedge Interrupt
task cmp_gpio_neg_intr;
input [7:0] port_a;
input [7:0] port_b;
input [7:0] port_c;
input [7:0] port_d;
begin

   // Drive GPIO with All One's
    cmp_gpio_input(8'hFF,8'hFF,8'hFF,8'hFF);

    // Clear Global Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,'h00008000);

   // Clear all the Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_CLR,'hFFFFFFFF);
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,32'h0);

    // Drive Ports
    cmp_gpio_input(port_d,port_c,port_b,port_a);

    // Wait for Edge Detection
    repeat (20) @(posedge clock); 

   // Drive GPIO with All One's
    cmp_gpio_input(8'hFF,8'hFF,8'hFF,8'hFF);

    // Wait for Edge Detection
    repeat (20) @(posedge clock); 

    // Neg edge interrupt is will compliment  of input value
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,{port_d ^ 8'hFF,(port_c ^ 8'hFF) & 8'h7F,port_b ^ 8'hFF,8'h0});
    
    // Check The Global Interrupt
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,read_data,32'h8000);

    if(irq_lines[15] != 1'b1) begin
	$display("ERROR: Global GPIO Interrupt not detected");
       `TB_GLBL.test_fail = 1;
    end

    // Clear The GPIO Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_CLR,32'hFFFFFFFF);

    // Clear GPIO Interrupt
    wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,'h8000);

    // Check Interrupt are cleared
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GBL_INTR,read_data,32'h0);
    wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_INTR_STAT,read_data,32'h0);

    if(irq_lines[15] != 1'b0) begin
	$display("ERROR: Global GPIO Interrupt is not cleared");
       `TB_GLBL.test_fail = 1;
    end
end
endtask

task wb_user_core_write;
input [31:0] address;
input [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h1;  // write
  wbd_ext_dat_i =data;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  $display("STATUS: WB USER ACCESS WRITE Address : 0x%x, Data : 0x%x",address,data);
  repeat (2) @(posedge clock);
end
endtask

task  wb_user_core_read;
input [31:0] address;
output [31:0] data;
reg    [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='0;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  repeat (1) @(negedge clock);
  data  = wbd_ext_dat_o;  
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  //$display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
  repeat (2) @(posedge clock);
end
endtask

task  wb_user_core_read_check;
input [31:0] address;
output [31:0] data;
input [31:0] cmp_data;
reg    [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='0;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  repeat (1) @(negedge clock);
  data  = wbd_ext_dat_o;  
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  if(data !== cmp_data) begin
     $display("ERROR : WB USER ACCESS READ  Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data);
     `TB_GLBL.test_fail = 1;
  end else begin
     $display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
  end
  repeat (2) @(posedge clock);
end
endtask


`ifdef GL

wire        wbd_spi_stb_i   = u_top.u_spi_master.wbd_stb_i;
wire        wbd_spi_ack_o   = u_top.u_spi_master.wbd_ack_o;
wire        wbd_spi_we_i    = u_top.u_spi_master.wbd_we_i;
wire [31:0] wbd_spi_adr_i   = u_top.u_spi_master.wbd_adr_i;
wire [31:0] wbd_spi_dat_i   = u_top.u_spi_master.wbd_dat_i;
wire [31:0] wbd_spi_dat_o   = u_top.u_spi_master.wbd_dat_o;
wire [3:0]  wbd_spi_sel_i   = u_top.u_spi_master.wbd_sel_i;

wire        wbd_uart_stb_i  = u_top.u_uart_i2c_usb.reg_cs;
wire        wbd_uart_ack_o  = u_top.u_uart_i2c_usb.reg_ack;
wire        wbd_uart_we_i   = u_top.u_uart_i2c_usb.reg_wr;
wire [7:0]  wbd_uart_adr_i  = u_top.u_uart_i2c_usb.reg_addr;
wire [7:0]  wbd_uart_dat_i  = u_top.u_uart_i2c_usb.reg_wdata;
wire [7:0]  wbd_uart_dat_o  = u_top.u_uart_i2c_usb.reg_rdata;
wire        wbd_uart_sel_i  = u_top.u_uart_i2c_usb.reg_be;

`endif

/**
`ifdef GL
//-----------------------------------------------------------------------------
// RISC IMEM amd DMEM Monitoring TASK
//-----------------------------------------------------------------------------

`define RISC_CORE  user_uart_tb.u_top.u_core.u_riscv_top

always@(posedge `RISC_CORE.wb_clk) begin
    if(`RISC_CORE.wbd_imem_ack_i)
          $display("RISCV-DEBUG => IMEM ADDRESS: %x Read Data : %x", `RISC_CORE.wbd_imem_adr_o,`RISC_CORE.wbd_imem_dat_i);
    if(`RISC_CORE.wbd_dmem_ack_i && `RISC_CORE.wbd_dmem_we_o)
          $display("RISCV-DEBUG => DMEM ADDRESS: %x Write Data: %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_o);
    if(`RISC_CORE.wbd_dmem_ack_i && !`RISC_CORE.wbd_dmem_we_o)
          $display("RISCV-DEBUG => DMEM ADDRESS: %x READ Data : %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_i);
end

`endif
**/

endmodule
`default_nettype wire