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[/] [amber/] [trunk/] [hw/] [vlog/] [system/] [test_module.v] - Rev 61
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////////////////////////////////////////////////////////////////// // // // Test Module // // // // This file is part of the Amber project // // http://www.opencores.org/project,amber // // // // Description // // Contains a random number generator and a couple of timers // // that connect to interrupt lines. Used for testing the // // ssytem. // // // // Author(s): // // - Conor Santifort, csantifort.amber@gmail.com // // // ////////////////////////////////////////////////////////////////// // // // Copyright (C) 2010 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 // // // ////////////////////////////////////////////////////////////////// module test_module #( parameter WB_DWIDTH = 32, parameter WB_SWIDTH = 4 )( input i_clk, output o_irq, output o_firq, output o_mem_ctrl, // 0=128MB, 1=32MB input [31:0] i_wb_adr, input [WB_SWIDTH-1:0] i_wb_sel, input i_wb_we, output [WB_DWIDTH-1:0] o_wb_dat, input [WB_DWIDTH-1:0] i_wb_dat, input i_wb_cyc, input i_wb_stb, output o_wb_ack, output o_wb_err, output [3:0] o_led, output o_phy_rst_n ); `include "register_addresses.v" reg [7:0] firq_timer = 'd0; reg [7:0] irq_timer = 'd0; reg [7:0] random_num = 8'hf3; //synopsys translate_off reg [1:0] tb_uart_control_reg = 'd0; reg [1:0] tb_uart_status_reg = 'd0; reg tb_uart_push = 'd0; reg [7:0] tb_uart_txd_reg = 'd0; //synopsys translate_on reg [2:0] sim_ctrl_reg = 'd0; // 0 = fpga, other values for simulations reg mem_ctrl_reg = 'd0; // 0 = 128MB, 1 = 32MB main memory reg [31:0] test_status_reg = 'd0; reg test_status_set = 'd0; // used to terminate tests reg [31:0] cycles_reg = 'd0; wire wb_start_write; wire wb_start_read; reg wb_start_read_d1 = 'd0; reg [31:0] wb_rdata32 = 'd0; wire [31:0] wb_wdata32; reg [3:0] led_reg = 'd0; reg phy_rst_reg = 'd0; // Can't start a write while a read is completing. The ack for the read cycle // needs to be sent first assign wb_start_write = i_wb_stb && i_wb_we && !wb_start_read_d1; assign wb_start_read = i_wb_stb && !i_wb_we && !o_wb_ack; always @( posedge i_clk ) wb_start_read_d1 <= wb_start_read; assign o_wb_ack = i_wb_stb && ( wb_start_write || wb_start_read_d1 ); assign o_wb_err = 1'd0; assign o_mem_ctrl = mem_ctrl_reg; assign o_led = led_reg; assign o_phy_rst_n = phy_rst_reg; generate if (WB_DWIDTH == 128) begin : wb128 assign wb_wdata32 = i_wb_adr[3:2] == 2'd3 ? i_wb_dat[127:96] : i_wb_adr[3:2] == 2'd2 ? i_wb_dat[ 95:64] : i_wb_adr[3:2] == 2'd1 ? i_wb_dat[ 63:32] : i_wb_dat[ 31: 0] ; assign o_wb_dat = {4{wb_rdata32}}; end else begin : wb32 assign wb_wdata32 = i_wb_dat; assign o_wb_dat = wb_rdata32; end endgenerate // ======================================================== // Register Reads // ======================================================== always @( posedge i_clk ) if ( wb_start_read ) case ( i_wb_adr[15:0] ) AMBER_TEST_STATUS: wb_rdata32 <= test_status_reg; AMBER_TEST_FIRQ_TIMER: wb_rdata32 <= {24'd0, firq_timer}; AMBER_TEST_IRQ_TIMER: wb_rdata32 <= {24'd0, irq_timer}; AMBER_TEST_RANDOM_NUM: wb_rdata32 <= {24'd0, random_num}; /* Allow access to the random register over a 16-word address range to load a series of random numbers using lmd instruction. */ AMBER_TEST_RANDOM_NUM00: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM01: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM02: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM03: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM04: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM05: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM06: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM07: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM08: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM09: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM10: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM11: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM12: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM13: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM14: wb_rdata32 <= {24'd0, random_num}; AMBER_TEST_RANDOM_NUM15: wb_rdata32 <= {24'd0, random_num}; //synopsys translate_off AMBER_TEST_UART_CONTROL: wb_rdata32 <= {30'd0, tb_uart_control_reg}; AMBER_TEST_UART_STATUS: wb_rdata32 <= {30'd0, tb_uart_status_reg}; AMBER_TEST_UART_TXD: wb_rdata32 <= {24'd0, tb_uart_txd_reg}; //synopsys translate_on AMBER_TEST_SIM_CTRL: wb_rdata32 <= {29'd0, sim_ctrl_reg}; AMBER_TEST_MEM_CTRL: wb_rdata32 <= {31'd0, mem_ctrl_reg}; AMBER_TEST_CYCLES: wb_rdata32 <= cycles_reg; AMBER_TEST_LED: wb_rdata32 <= {27'd0, led_reg}; AMBER_TEST_PHY_RST: wb_rdata32 <= {31'd0, phy_rst_reg}; default: wb_rdata32 <= 32'haabbccdd; endcase // ====================================== // Simulation bit // ====================================== // This register bit is a 1 in simulation but a 0 in the real fpga // Used by software to tell the difference //synopsys translate_off `ifndef AMBER_SIM_CTRL `define AMBER_SIM_CTRL 0 `endif always @( posedge i_clk ) begin // Value reads as 1 in simulation, and zero in the FPGA sim_ctrl_reg <= 3'd `AMBER_SIM_CTRL ; end //synopsys translate_on // ====================================== // Interrupts // ====================================== assign o_irq = irq_timer == 8'd1; assign o_firq = firq_timer == 8'd1; // ====================================== // FIRQ Timer Register // ====================================== // Write a value > 1 to set the firq timer // Write 0 to clear it always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_FIRQ_TIMER ) firq_timer <= wb_wdata32[7:0]; else if ( firq_timer > 8'd1 ) firq_timer <= firq_timer - 1'd1; // ====================================== // IRQ Timer Register // ====================================== // Write a value > 1 to set the irq timer // Write 0 to clear it always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_IRQ_TIMER ) irq_timer <= wb_wdata32[7:0]; else if ( irq_timer > 8'd1 ) irq_timer <= irq_timer - 1'd1; // ====================================== // Random Number Generator Register // ====================================== // Write a value > 1 to set the irq timer // Write 0 to clear it always @( posedge i_clk ) begin if ( wb_start_write && i_wb_adr[15:8] == AMBER_TEST_RANDOM_NUM[15:8] ) random_num <= wb_wdata32[7:0]; // generate a new random number on every read access else if ( wb_start_read && i_wb_adr[15:8] == AMBER_TEST_RANDOM_NUM[15:8] ) random_num <= { random_num[3]^random_num[1], random_num[0]^random_num[5], ~random_num[7]^random_num[4], ~random_num[2], random_num[6], random_num[4]^~random_num[3], random_num[7]^~random_num[1], random_num[7] }; end // ====================================== // Test Status Write // ====================================== always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_STATUS ) test_status_reg <= wb_wdata32; // ====================================== // Test Status Write // ====================================== always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_STATUS ) test_status_set <= 1'd1; // ====================================== // Cycles counter // ====================================== always @( posedge i_clk ) cycles_reg <= cycles_reg + 1'd1; // ====================================== // Memory Configuration Register Write // ====================================== always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_MEM_CTRL ) mem_ctrl_reg <= wb_wdata32[0]; // ====================================== // Test LEDs // ====================================== always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_LED ) led_reg <= wb_wdata32[3:0]; // ====================================== // PHY Reset Register // ====================================== always @( posedge i_clk ) if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_PHY_RST ) phy_rst_reg <= wb_wdata32[0]; // ====================================== // Test UART registers // ====================================== // These control the testbench UART, not the real // UART in system //synopsys translate_off always @( posedge i_clk ) begin if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_UART_CONTROL ) tb_uart_control_reg <= wb_wdata32[1:0]; if ( wb_start_write && i_wb_adr[15:0] == AMBER_TEST_UART_TXD ) begin tb_uart_txd_reg <= wb_wdata32[7:0]; tb_uart_push <= !tb_uart_push; end end //synopsys translate_on endmodule
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