diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml new file mode 100644 index 0000000..a290102 --- /dev/null +++ b/.github/workflows/docs.yaml @@ -0,0 +1,17 @@ +name: docs + +on: + push: + workflow_dispatch: + +jobs: + docs: + runs-on: ubuntu-latest + steps: + - name: Checkout repo + uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Build docs + uses: TinyTapeout/tt-gds-action/docs@tt06 diff --git a/.github/workflows/gds.yaml b/.github/workflows/gds.yaml new file mode 100644 index 0000000..0d62a79 --- /dev/null +++ b/.github/workflows/gds.yaml @@ -0,0 +1,45 @@ +name: gds + +on: + push: + workflow_dispatch: + +jobs: + gds: + runs-on: ubuntu-latest + steps: + - name: checkout repo + uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Build GDS + uses: TinyTapeout/tt-gds-action@tt06 + + precheck: + needs: gds + runs-on: ubuntu-latest + steps: + - name: Run Tiny Tapeout Precheck + uses: TinyTapeout/tt-gds-action/precheck@tt06 + + gl_test: + needs: gds + runs-on: ubuntu-latest + steps: + - name: checkout repo + uses: actions/checkout@v4 + with: + submodules: recursive + + - name: GL test + uses: TinyTapeout/tt-gds-action/gl_test@tt06 + + viewer: + needs: gds + runs-on: ubuntu-latest + permissions: + pages: write # to deploy to Pages + id-token: write # to verify the deployment originates from an appropriate source + steps: + - uses: TinyTapeout/tt-gds-action/viewer@tt06 diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml new file mode 100644 index 0000000..f8a3f19 --- /dev/null +++ b/.github/workflows/test.yaml @@ -0,0 +1,48 @@ +name: test +on: [push, workflow_dispatch] +jobs: + test: + runs-on: ubuntu-latest + steps: + - name: Checkout repo + uses: actions/checkout@v4 + + - name: Install iverilog + shell: bash + run: sudo apt-get update && sudo apt-get install -y iverilog + + # Set Python up and install cocotb + - name: Setup python + uses: actions/setup-python@v5 + with: + python-version: '3.11' + + - name: Install cocotb 1.8.x + shell: bash + run: | + pip install cocotb~=1.8.0 + cocotb-config --libpython + cocotb-config --python-bin + + - name: Run tests + run: | + cd test + make clean + make + # make will return success even if the test fails, so check for failure in the results.xml + ! grep failure results.xml + + - name: Test Summary + uses: test-summary/action@v2.2 + with: + paths: "test/results.xml" + if: always() + + - name: upload vcd + if: success() || failure() + uses: actions/upload-artifact@v4 + with: + name: test-vcd + path: | + test/tb.vcd + test/result.xml diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..e62b85d --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +.DS_Store +.idea +.vscode +*.vcd +runs +tt_submission +src/user_config.tcl +test/sim_build +test/__pycache__/ +test/results.xml +test/gate_level_netlist.v diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + 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. diff --git a/README.md b/README.md new file mode 100644 index 0000000..1c44853 --- /dev/null +++ b/README.md @@ -0,0 +1,41 @@ +![](../../workflows/gds/badge.svg) ![](../../workflows/docs/badge.svg) ![](../../workflows/test/badge.svg) + +# Tiny Tapeout Verilog Project Template + +- [Read the documentation for project](docs/info.md) + +## What is Tiny Tapeout? + +TinyTapeout is an educational project that aims to make it easier and cheaper than ever to get your digital designs manufactured on a real chip. + +To learn more and get started, visit https://tinytapeout.com. + +## Verilog Projects + +1. Add your Verilog files to the `src` folder. +2. Edit the [info.yaml](info.yaml) and update information about your project, paying special attention to the `source_files` and `top_module` properties. If you are upgrading an existing Tiny Tapeout project, check out our [online info.yaml migration tool](https://tinytapeout.github.io/tt-yaml-upgrade-tool/). +3. Edit [docs/info.md](docs/info.md) and add a description of your project. +4. Optionally, add a testbench to the `test` folder. See [test/README.md](test/README.md) for more information. + +The GitHub action will automatically build the ASIC files using [OpenLane](https://www.zerotoasiccourse.com/terminology/openlane/). + +## Enable GitHub actions to build the results page + +- [Enabling GitHub Pages](https://tinytapeout.com/faq/#my-github-action-is-failing-on-the-pages-part) + +## Resources + +- [FAQ](https://tinytapeout.com/faq/) +- [Digital design lessons](https://tinytapeout.com/digital_design/) +- [Learn how semiconductors work](https://tinytapeout.com/siliwiz/) +- [Join the community](https://tinytapeout.com/discord) +- [Build your design locally](https://docs.google.com/document/d/1aUUZ1jthRpg4QURIIyzlOaPWlmQzr-jBn3wZipVUPt4) + +## What next? + +- [Submit your design to the next shuttle](https://app.tinytapeout.com/). +- Edit [this README](README.md) and explain your design, how it works, and how to test it. +- Share your project on your social network of choice: + - LinkedIn [#tinytapeout](https://www.linkedin.com/search/results/content/?keywords=%23tinytapeout) [@TinyTapeout](https://www.linkedin.com/company/100708654/) + - Mastodon [#tinytapeout](https://chaos.social/tags/tinytapeout) [@matthewvenn](https://chaos.social/@matthewvenn) + - X (formerly Twitter) [#tinytapeout](https://twitter.com/hashtag/tinytapeout) [@matthewvenn](https://twitter.com/matthewvenn) diff --git a/docs/info.md b/docs/info.md new file mode 100644 index 0000000..ce1f04c --- /dev/null +++ b/docs/info.md @@ -0,0 +1,20 @@ + + +## How it works + +Explain how your project works + +## How to test + +Explain how to use your project + +## External hardware + +List external hardware used in your project (e.g. PMOD, LED display, etc), if any diff --git a/info.yaml b/info.yaml new file mode 100644 index 0000000..f04da75 --- /dev/null +++ b/info.yaml @@ -0,0 +1,53 @@ +# Tiny Tapeout project information +project: + title: "" # Project title + author: "" # Your name + discord: "" # Your discord username, for communication and automatically assigning you a Tapeout role (optional) + description: "" # One line description of what your project does + language: "Verilog" # other examples include SystemVerilog, Amaranth, VHDL, etc + clock_hz: 0 # Clock frequency in Hz (or 0 if not applicable) + + # How many tiles your design occupies? A single tile is about 167x108 uM. + tiles: "1x1" # Valid values: 1x1, 1x2, 2x2, 3x2, 4x2, 6x2 or 8x2 + + # Your top module name must start with "tt_um_". Make it unique by including your github username: + top_module: "tt_um_example" + + # List your project's source files here. Source files must be in ./src and you must list each source file separately, one per line: + source_files: + - "project.v" + +# The pinout of your project. Leave unused pins blank. DO NOT delete or add any pins. +pinout: + # Inputs + ui[0]: "" + ui[1]: "" + ui[2]: "" + ui[3]: "" + ui[4]: "" + ui[5]: "" + ui[6]: "" + ui[7]: "" + + # Outputs + uo[0]: "" + uo[1]: "" + uo[2]: "" + uo[3]: "" + uo[4]: "" + uo[5]: "" + uo[6]: "" + uo[7]: "" + + # Bidirectional pins + uio[0]: "" + uio[1]: "" + uio[2]: "" + uio[3]: "" + uio[4]: "" + uio[5]: "" + uio[6]: "" + uio[7]: "" + +# Do not change! +yaml_version: 6 diff --git a/src/config.tcl b/src/config.tcl new file mode 100644 index 0000000..4a525a1 --- /dev/null +++ b/src/config.tcl @@ -0,0 +1,78 @@ +# DO NOT EDIT THIS FILE before reading the comments below: + +# This is the default configuration for Tiny Tapeout projects. It should fit most designs. +# If you change it, please make sure you understand what you are doing. We are not responsible +# if your project fails because of a bad configuration. + +# !!! DO NOT EDIT THIS FILE unless you know what you are doing !!! + +# If you get stuck with this config, please open an issue or get in touch via the discord. + +# Here are some of the variables you may want to change: + +# PL_TARGET_DENSITY - You can increase this if Global Placement fails with error GPL-0302. +# Users have reported that values up to 0.8 worked well for them. +set ::env(PL_TARGET_DENSITY) 0.6 + +# CLOCK_PERIOD - Increase this in case you are getting setup time violations. +# The value is in nanoseconds, so 20ns == 50MHz. +set ::env(CLOCK_PERIOD) "20" + +# Hold slack margin - Increase them in case you are getting hold violations. +set ::env(PL_RESIZER_HOLD_SLACK_MARGIN) 0.1 +set ::env(GLB_RESIZER_HOLD_SLACK_MARGIN) 0.05 + +# RUN_LINTER, LINTER_INCLUDE_PDK_MODELS - Disabling the linter is not recommended! +set ::env(RUN_LINTER) 1 +set ::env(LINTER_INCLUDE_PDK_MODELS) 1 + +# Configuration docs: https://openlane.readthedocs.io/en/latest/reference/configuration.html + +# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! +# !!! DO NOT CHANGE ANYTHING BELOW THIS POINT !!! +# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! + +# Load configuration auto-generated by tt-support-tools +set script_dir [file dirname [file normalize [info script]]] +source $::env(DESIGN_DIR)/user_config.tcl + +# Save some time +set ::env(RUN_KLAYOUT_XOR) 0 +set ::env(RUN_KLAYOUT_DRC) 0 + +# Don't put clock buffers on the outputs +set ::env(PL_RESIZER_BUFFER_OUTPUT_PORTS) 0 + +# Allow use of specific sky130 cells +set ::env(SYNTH_READ_BLACKBOX_LIB) 1 + +# Reduce wasted space +set ::env(TOP_MARGIN_MULT) 1 +set ::env(BOTTOM_MARGIN_MULT) 1 +set ::env(LEFT_MARGIN_MULT) 6 +set ::env(RIGHT_MARGIN_MULT) 6 + +# Absolute die size +set ::env(FP_SIZING) absolute + +set ::env(PL_BASIC_PLACEMENT) {0} +set ::env(GRT_ALLOW_CONGESTION) "1" + +set ::env(FP_IO_HLENGTH) 2 +set ::env(FP_IO_VLENGTH) 2 + +# Use alternative efabless decap cells to solve LI density issue +set ::env(DECAP_CELL) "\ + sky130_fd_sc_hd__decap_3 \ + sky130_fd_sc_hd__decap_4 \ + sky130_fd_sc_hd__decap_6 \ + sky130_fd_sc_hd__decap_8 \ + sky130_ef_sc_hd__decap_12" + +# Clock +set ::env(RUN_CTS) 1 +set ::env(CLOCK_PORT) {clk} + +# Don't use power rings or met5 layer +set ::env(DESIGN_IS_CORE) 0 +set ::env(RT_MAX_LAYER) {met4} diff --git a/src/project.v b/src/project.v new file mode 100644 index 0000000..a8a9476 --- /dev/null +++ b/src/project.v @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2024 Your Name + * SPDX-License-Identifier: Apache-2.0 + */ + +`define default_netname none + +module tt_um_example ( + input wire [7:0] ui_in, // Dedicated inputs + output wire [7:0] uo_out, // Dedicated outputs + input wire [7:0] uio_in, // IOs: Input path + output wire [7:0] uio_out, // IOs: Output path + output wire [7:0] uio_oe, // IOs: Enable path (active high: 0=input, 1=output) + input wire ena, // will go high when the design is enabled + input wire clk, // clock + input wire rst_n // reset_n - low to reset +); + + // All output pins must be assigned. If not used, assign to 0. + assign uo_out = ui_in + uio_in; // Example: ou_out is the sum of ui_in and uio_in + assign uio_out = 0; + assign uio_oe = 0; + +endmodule diff --git a/test/Makefile b/test/Makefile new file mode 100644 index 0000000..4413db2 --- /dev/null +++ b/test/Makefile @@ -0,0 +1,42 @@ +# Makefile +# See https://docs.cocotb.org/en/stable/quickstart.html for more info + +# defaults +SIM ?= icarus +TOPLEVEL_LANG ?= verilog +SRC_DIR = $(PWD)/../src +PROJECT_SOURCES = project.v + +ifneq ($(GATES),yes) + +# RTL simulation: +SIM_BUILD = sim_build/rtl +VERILOG_SOURCES += $(addprefix $(SRC_DIR)/,$(PROJECT_SOURCES)) +COMPILE_ARGS += -I$(SRC_DIR) + +else + +# Gate level simulation: +SIM_BUILD = sim_build/gl +COMPILE_ARGS += -DGL_TEST +COMPILE_ARGS += -DFUNCTIONAL +COMPILE_ARGS += -DUSE_POWER_PINS +COMPILE_ARGS += -DSIM +COMPILE_ARGS += -DUNIT_DELAY=\#1 +VERILOG_SOURCES += $(PDK_ROOT)/sky130A/libs.ref/sky130_fd_sc_hd/verilog/primitives.v +VERILOG_SOURCES += $(PDK_ROOT)/sky130A/libs.ref/sky130_fd_sc_hd/verilog/sky130_fd_sc_hd.v + +# this gets copied in by the GDS action workflow +VERILOG_SOURCES += $(PWD)/gate_level_netlist.v + +endif + +# Include the testbench sources: +VERILOG_SOURCES += $(PWD)/tb.v +TOPLEVEL = tb + +# MODULE is the basename of the Python test file +MODULE = test + +# include cocotb's make rules to take care of the simulator setup +include $(shell cocotb-config --makefiles)/Makefile.sim diff --git a/test/README.md b/test/README.md new file mode 100644 index 0000000..1a5abbf --- /dev/null +++ b/test/README.md @@ -0,0 +1,30 @@ +# Sample testbench for a Tiny Tapeout project + +This is a sample testbench for a Tiny Tapeout project. It uses [cocotb](https://docs.cocotb.org/en/stable/) to drive the DUT and check the outputs. + +## Setting up + +1. Edit [Makefile](Makefile) and modify `PROJECT_SOURCES` to point to your Verilog files. +2. Edit [tb.v](tb.v) and replace `tt_um_example` with your module name. + +## How to run + +To run the RTL simulation: + +```sh +make +``` + +To run gatelevel simulation, first harden your project and copy `../runs/wokwi/results/final/verilog/gl/{your_module_name}.v` to `gate_level_netlist.v`. + +Then run: + +```sh +make GATES=yes +``` + +## How to view the VCD file + +```sh +gtkwave tb.vcd tb.gtkw +``` diff --git a/test/tb.gtkw b/test/tb.gtkw new file mode 100644 index 0000000..c92ca3c --- /dev/null +++ b/test/tb.gtkw @@ -0,0 +1,39 @@ +[*] +[*] GTKWave Analyzer v3.4.0 (w)1999-2022 BSI +[*] Mon Nov 20 16:00:28 2023 +[*] +[dumpfile] "/home/uri/p/tt-new-template-proto/test/tb.vcd" +[dumpfile_mtime] "Mon Nov 20 15:58:34 2023" +[dumpfile_size] 1110 +[savefile] "/home/uri/p/tt-new-template-proto/test/tb.gtkw" +[timestart] 0 +[size] 1376 600 +[pos] -1 -1 +*-24.534533 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 +[treeopen] tb. +[sst_width] 297 +[signals_width] 230 +[sst_expanded] 1 +[sst_vpaned_height] 158 +@28 +tb.user_project.ena +@29 +tb.user_project.clk +@28 +tb.user_project.rst_n +@200 +-Inputs +@22 +tb.user_project.ui_in[7:0] +@200 +-Bidirectional Pins +@22 +tb.user_project.uio_in[7:0] +tb.user_project.uio_oe[7:0] +tb.user_project.uio_out[7:0] +@200 +-Output Pins +@22 +tb.user_project.uo_out[7:0] +[pattern_trace] 1 +[pattern_trace] 0 diff --git a/test/tb.v b/test/tb.v new file mode 100644 index 0000000..2e86eb4 --- /dev/null +++ b/test/tb.v @@ -0,0 +1,44 @@ +`default_nettype none `timescale 1ns / 1ps + +/* This testbench just instantiates the module and makes some convenient wires + that can be driven / tested by the cocotb test.py. +*/ +module tb (); + + // Dump the signals to a VCD file. You can view it with gtkwave. + initial begin + $dumpfile("tb.vcd"); + $dumpvars(0, tb); + #1; + end + + // Wire up the inputs and outputs: + reg clk; + reg rst_n; + reg ena; + reg [7:0] ui_in; + reg [7:0] uio_in; + wire [7:0] uo_out; + wire [7:0] uio_out; + wire [7:0] uio_oe; + + // Replace tt_um_example with your module name: + tt_um_example user_project ( + + // Include power ports for the Gate Level test: +`ifdef GL_TEST + .VPWR(1'b1), + .VGND(1'b0), +`endif + + .ui_in (ui_in), // Dedicated inputs + .uo_out (uo_out), // Dedicated outputs + .uio_in (uio_in), // IOs: Input path + .uio_out(uio_out), // IOs: Output path + .uio_oe (uio_oe), // IOs: Enable path (active high: 0=input, 1=output) + .ena (ena), // enable - goes high when design is selected + .clk (clk), // clock + .rst_n (rst_n) // not reset + ); + +endmodule diff --git a/test/test.py b/test/test.py new file mode 100644 index 0000000..6e4b93c --- /dev/null +++ b/test/test.py @@ -0,0 +1,32 @@ +# SPDX-FileCopyrightText: © 2023 Uri Shaked +# SPDX-License-Identifier: MIT + +import cocotb +from cocotb.clock import Clock +from cocotb.triggers import ClockCycles + +@cocotb.test() +async def test_adder(dut): + dut._log.info("Start") + + # Our example module doesn't use clock and reset, but we show how to use them here anyway. + clock = Clock(dut.clk, 10, units="us") + cocotb.start_soon(clock.start()) + + # Reset + dut._log.info("Reset") + dut.ena.value = 1 + dut.ui_in.value = 0 + dut.uio_in.value = 0 + dut.rst_n.value = 0 + await ClockCycles(dut.clk, 10) + dut.rst_n.value = 1 + + # Set the input values, wait one clock cycle, and check the output + dut._log.info("Test") + dut.ui_in.value = 20 + dut.uio_in.value = 30 + + await ClockCycles(dut.clk, 1) + + assert dut.uo_out.value == 50