| `default_nettype none |
| // SPDX-FileCopyrightText: 2021 Anish Singhani |
| // |
| // 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 |
| |
| `timescale 1 ns / 1 ps |
| |
| `include "uprj_netlists.v" |
| `include "caravel_netlists.v" |
| `include "spiflash.v" |
| |
| module sha256_tb; |
| |
| reg clock; |
| reg power1; |
| reg power2; |
| reg RSTB; |
| reg CSB; |
| |
| always #10 clock <= (clock === 1'b0); |
| |
| initial begin |
| clock <= 0; |
| end |
| |
| initial begin |
| //$dumpfile("sha256.vcd"); |
| //$dumpvars(0, sha256_tb); |
| |
| `ifdef GL |
| $display("Res: Starting SHA256 (GL) test"); |
| `else |
| $display("Res: Starting SHA256 (RTL) test"); |
| `endif |
| |
| repeat (800) begin |
| repeat (1000) @(posedge clock); |
| end |
| |
| $display ("Res: Timeout, SHA256 test FAILED"); |
| $finish; |
| end |
| |
| wire [37:0] mprj_io; |
| assign mprj_io[3] = CSB ? 1'b1 : 1'bZ; |
| |
| wire flash_csb; |
| wire flash_clk; |
| wire flash_io0; |
| wire flash_io1; |
| wire gpio; |
| |
| initial begin |
| $display("Resetting..."); |
| RSTB <= 1'b0; |
| CSB <= 1'b1; // Force CSB high |
| #2000; |
| $display("Done resetting..."); |
| RSTB <= 1'b1; // Release reset |
| end |
| |
| initial begin |
| power1 <= 1'b0; |
| power2 <= 1'b0; |
| #200; |
| power1 <= 1'b1; |
| #200; |
| power2 <= 1'b1; |
| end |
| |
| |
| wire VDD3V3; |
| wire VDD1V8; |
| wire VSS; |
| |
| assign VDD3V3 = power1; |
| assign VDD1V8 = power2; |
| assign VSS = 1'b0; |
| |
| // Printf I/O |
| always @(posedge gpio) begin |
| CSB = 1'b0; // CSB can be released |
| #1 |
| $write("%c", mprj_io[15:8]); |
| if (mprj_io[15:8] == 8'h04) begin // End of test |
| $display("Res: SHA256 test completed! (see results above)"); |
| $finish; |
| end |
| end |
| |
| caravel uut ( |
| .vddio (VDD3V3), |
| .vssio (VSS), |
| .vdda (VDD3V3), |
| .vssa (VSS), |
| .vccd (VDD1V8), |
| .vssd (VSS), |
| .vdda1 (VDD3V3), |
| .vdda2 (VDD3V3), |
| .vssa1 (VSS), |
| .vssa2 (VSS), |
| .vccd1 (VDD1V8), |
| .vccd2 (VDD1V8), |
| .vssd1 (VSS), |
| .vssd2 (VSS), |
| .clock (clock), |
| .gpio (gpio), |
| .mprj_io (mprj_io), |
| .flash_csb(flash_csb), |
| .flash_clk(flash_clk), |
| .flash_io0(flash_io0), |
| .flash_io1(flash_io1), |
| .resetb (RSTB) |
| ); |
| |
| spiflash #( |
| .FILENAME("sha256.hex") |
| ) spiflash ( |
| .csb(flash_csb), |
| .clk(flash_clk), |
| .io0(flash_io0), |
| .io1(flash_io1), |
| .io2(), // not used |
| .io3() // not used |
| ); |
| |
| endmodule |
| `default_nettype wire |