| // SPDX-FileCopyrightText: 2020 Efabless Corporation |
| // |
| // 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 |
| |
| `default_nettype none |
| |
| `timescale 1 ns / 1 ps |
| |
| module peripheralsPWM_tb; |
| reg clock; |
| reg RSTB; |
| reg CSB; |
| reg power1, power2; |
| reg power3, power4; |
| |
| wire gpio; |
| wire [37:0] mprj_io; |
| |
| wire[2:0] pwmOutputs = {mprj_io[16], mprj_io[15], mprj_io[14]}; |
| wire succesOutput = mprj_io[12]; |
| wire nextTestOutput = mprj_io[13]; |
| reg timingValid = 1'b1; |
| |
| pullup(mprj_io[3]); |
| assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz; |
| |
| // 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); |
| |
| // Need to add pulls (can be up or down) to all unsed io so that input data is known |
| assign mprj_io[2:0] = 3'b0; |
| assign mprj_io[11:4] = 8'b0; |
| assign mprj_io[37:17] = 24'b0; |
| |
| initial begin |
| clock = 0; |
| timingValid = 1'b1; |
| end |
| |
| realtime timerStart; |
| realtime timerLength; |
| |
| initial begin |
| $dumpfile("peripheralsPWM.vcd"); |
| |
| `ifdef SIM |
| $dumpvars(0, peripheralsPWM_tb); |
| `else |
| $dumpvars(1, peripheralsPWM_tb); |
| $dumpvars(2, peripheralsPWM_tb.uut.mprj); |
| `endif |
| |
| // Repeat cycles of 1000 clock edges as needed to complete testbench |
| repeat (750) begin |
| repeat (1000) @(posedge clock); |
| //$display("+1000 cycles"); |
| end |
| $display("%c[1;35m",27); |
| `ifdef GL |
| $display ("Monitor: Timeout, Peripherals PWM Test (GL) Failed"); |
| `else |
| $display ("Monitor: Timeout, Peripherals PWM Test (RTL) Failed"); |
| `endif |
| $display("%c[0m",27); |
| $finish; |
| end |
| |
| initial begin |
| |
| // Check device 0 config |
| @(posedge nextTestOutput); |
| |
| // Check device 0 counter top value |
| @(posedge nextTestOutput); |
| |
| // Check device 1 config |
| @(posedge nextTestOutput); |
| |
| // Check device 1 counter top value |
| @(posedge nextTestOutput); |
| |
| // Check device 0 ouput value 2 compare value |
| @(posedge nextTestOutput); |
| |
| // Check device 0 ouput value 3 compare value |
| @(posedge nextTestOutput); |
| |
| // Check device 1 ouput value 0 compare value |
| @(posedge nextTestOutput); |
| |
| // Check device 0 counter changes |
| @(posedge nextTestOutput); |
| |
| // Check internal value goes high |
| @(posedge nextTestOutput); |
| |
| // Check internal value goes low |
| @(posedge nextTestOutput); |
| |
| //----------------Device 0 ouput value 2----------------// |
| // Has 0.2us resolution |
| // Wait for start of device 0 ouput value 0 signal |
| @(negedge pwmOutputs[0]); |
| timerStart = $realtime; |
| |
| // Measure device 0 ouput value 2 low time |
| @(posedge pwmOutputs[0]); |
| timerLength = $realtime - timerStart; |
| $display("Device 0 Output 2 Low Time: ", timerLength); |
| if (timerLength < 499800 || timerLength > 500200) timingValid = 1'b0; |
| else $display("Invalid time, should be between 499800 and 500200"); |
| |
| // Measure device 0 ouput value 2 period |
| @(negedge pwmOutputs[0]); |
| timerLength = $realtime - timerStart; |
| $display("Device 0 Output 2 Period: ", timerLength); |
| if (timerLength < 999800 || timerLength > 1000200) timingValid = 1'b0; |
| else $display("Invalid time, should be between 999800 and 1000200"); |
| @(posedge nextTestOutput); |
| |
| //----------------Device 0 ouput value 3----------------// |
| // Has 0.2us resolution |
| // Wait for start of device 0 ouput value 1 signal |
| @(negedge pwmOutputs[1]); |
| timerStart = $realtime; |
| |
| // Measure device 0 ouput value 3 low time |
| @(posedge pwmOutputs[1]); |
| timerLength = $realtime - timerStart; |
| $display("Device 0 Output 3 Low Time: ", timerLength); |
| if (timerLength < 699800 || timerLength > 700200) timingValid = 1'b0; |
| else $display("Invalid time, should be between 699800 and 700200"); |
| |
| // Measure device 0 ouput value 3 period |
| @(negedge pwmOutputs[1]); |
| timerLength = $realtime - timerStart; |
| $display("Device 0 Output 3 Period: ", timerLength); |
| if (timerLength < 999800 || timerLength > 1000200) timingValid = 1'b0; |
| else $display("Invalid time, should be between 999800 and 1000200"); |
| @(posedge nextTestOutput); |
| |
| //----------------Device 1 ouput value 0----------------// |
| // Has 0.1us resolution |
| // Wait for start of device 1 ouput value 0 signal |
| @(negedge pwmOutputs[2]); |
| timerStart = $realtime; |
| |
| // Measure device 1 ouput value 0 low time |
| @(posedge pwmOutputs[2]); |
| timerLength = $realtime - timerStart; |
| $display("Device 1 Output 0 Low Time: ", timerLength); |
| if (timerLength < 199900 || timerLength > 200100) timingValid = 1'b0; |
| else $display("Invalid time, should be between 199900 and 200100"); |
| |
| // Measure device 1 ouput value 0 period |
| @(negedge pwmOutputs[2]); |
| timerLength = $realtime - timerStart; |
| $display("Device 1 Output 0 Period: ", timerLength); |
| if (timerLength < 999900 || timerLength > 1000100) timingValid = 1'b0; |
| else $display("Invalid time, should be between 999900 and 1000100"); |
| |
| // Wait for management core to output the final output test result |
| @(posedge nextTestOutput); |
| |
| if (!timingValid) begin |
| $display("%c[1;31m",27); |
| `ifdef GL |
| $display ("Monitor: Peripherals PWM Timing (GL) Failed"); |
| `else |
| $display ("Monitor: Peripherals PWM Timing (RTL) Failed"); |
| `endif |
| $display("%c[0m",27); |
| end else if (succesOutput) begin |
| $display("%c[1;92m",27); |
| `ifdef GL |
| $display("Monitor: Peripherals PWM Test (GL) Passed"); |
| `else |
| $display("Monitor: Peripherals PWM Test (RTL) Passed"); |
| `endif |
| $display("%c[0m",27); |
| end else begin |
| $display("%c[1;31m",27); |
| `ifdef GL |
| $display ("Monitor: Peripherals PWM Test (GL) Failed"); |
| `else |
| $display ("Monitor: Peripherals PWM Test (RTL) Failed"); |
| `endif |
| $display("%c[0m",27); |
| end |
| $finish; |
| end |
| |
| initial begin |
| RSTB <= 1'b0; |
| CSB <= 1'b1; // Force CSB high |
| #2000; |
| RSTB <= 1'b1; // Release reset |
| #300000; |
| CSB = 1'b0; // CSB can be released |
| end |
| |
| initial begin // Power-up sequence |
| power1 <= 1'b0; |
| power2 <= 1'b0; |
| power3 <= 1'b0; |
| power4 <= 1'b0; |
| #100; |
| power1 <= 1'b1; |
| #100; |
| power2 <= 1'b1; |
| #100; |
| power3 <= 1'b1; |
| #100; |
| power4 <= 1'b1; |
| end |
| |
| always @(succesOutput, nextTestOutput, timingValid) begin |
| #1 $display("Success:0b%b Timing Valid:0b%b Next test:0b%b", succesOutput, timingValid, nextTestOutput); |
| end |
| |
| wire flash_csb; |
| wire flash_clk; |
| wire flash_io0; |
| wire flash_io1; |
| |
| wire VDD3V3; |
| wire VDD1V8; |
| wire VSS; |
| |
| assign VDD3V3 = power1; |
| assign VDD1V8 = power2; |
| assign VSS = 1'b0; |
| |
| caravel uut ( |
| .vddio (VDD3V3), |
| .vddio_2 (VDD3V3), |
| .vssio (VSS), |
| .vssio_2 (VSS), |
| .vdda (VDD3V3), |
| .vssa (VSS), |
| .vccd (VDD1V8), |
| .vssd (VSS), |
| .vdda1 (VDD3V3), |
| .vdda1_2 (VDD3V3), |
| .vdda2 (VDD3V3), |
| .vssa1 (VSS), |
| .vssa1_2 (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("peripheralsPWM.hex") |
| ) spiflash ( |
| .csb(flash_csb), |
| .clk(flash_clk), |
| .io0(flash_io0), |
| .io1(flash_io1), |
| .io2(), // not used |
| .io3() // not used |
| ); |
| |
| endmodule |
| `default_nettype wire |
