HDL_workflow/symbiflow.mdwn

   1 # Installation instructions for Symbiflow with Xilinx Artix7 100T Board
   2
   3 * <https://symbiflow.github.io/>
   4 * <https://github.com/SymbiFlow>
   5
   6 ## Bugzilla page
   7
   8 * <https://bugs.libre-soc.org/show_bug.cgi?id=654>
   9
  10 ## Setting up new debootstrap and chroot into it
  11
  12 Run the following if you wish to isolate the symbiflow build
  13 from other software (reproducible builds) or use the schroot
  14 auto-preparation script here:
  15 <https://git.libre-soc.org/?p=dev-env-setup.git;a=blob;f=mk-deb-chroot;hb=HEAD>
  16
  17     export MY_CHROOT=/stable-chroot
  18     mkdir $MY_CHROOT
  19     debootstrap buster $MY_CHROOT http://deb.debian.org/debian/
  20     mount -t proc proc $MY_CHROOT/proc
  21     mount -t sysfs sysfs $MY_CHROOT/sys
  22     mount -t devpts devpts $MY_CHROOT/dev/pts/
  23     chroot $MY_CHROOT /bin/bash
  24
  25 ## Add Buster Backports Repo and Update
  26
  27 ""buster backports is needed for cmake""
  28
  29     cat << EOF > /etc/apt/sources.list.d/buster_backports.list
  30     deb http://deb.debian.org/debian buster-backports main
  31     EOF
  32
  33 ""oooo annoying, pin preferences for buster-backports""
  34
  35     cat << EOF > /etc/apt/preferences.d/99buster-backports
  36     Package: *
  37     Pin: release a=buster-backports
  38     Pin-Priority: 900
  39     EOF
  40
  41 ""upgrade to buster-backports""
  42
  43     apt-get update -y
  44     apt-get upgrade -y
  45
  46
  47 ## Download neccessary softwares
  48
  49     apt-get install -y libcurl3-gnutls/buster git/buster wget
  50
  51     git clone https://github.com/steveicarus/iverilog.git
  52     git clone https://github.com/YosysHQ/yosys.git
  53     git clone https://github.com/YosysHQ/abc.git
  54     git clone https://github.com/oneapi-src/oneTBB.git
  55     git clone https://github.com/verilog-to-routing/vtr-verilog-to-routing.git
  56     git clone https://github.com/cliffordwolf/icestorm.git
  57     git clone https://github.com/SymbiFlow/prjxray.git
  58     git clone https://github.com/SymbiFlow/prjxray-db.git
  59     git clone https://github.com/SymbiFlow/yosys-symbiflow-plugins.git
  60     git clone https://github.com/SymbiFlow/symbiflow-examples.git
  61     git clone https://github.com/SymbiFlow/symbiflow-arch-defs.git
  62     git clone https://github.com/QuickLogic-Corp/quicklogic-fasm.git
  63     git clone https://github.com/QuickLogic-Corp/quicklogic-fasm-utils.git
  64     git clone https://github.com/SymbiFlow/python-fpga-interchange.git
  65     git clone https://github.com/capnproto/capnproto.git
  66     git clone https://github.com/capnproto/pycapnp.git
  67
  68     wget http://xmlsoft.org/sources/libxml2-2.9.12.tar.gz
  69     wget http://xmlsoft.org/sources/libxslt-1.1.34.tar.gz
  70
  71 ## Steps to compile Icarus Verilog
  72
  73 ### Necessary software to install
  74
  75     apt-get install -y build-essential autoconf make g++ bison flex gperf \
  76       libreadline6-dev
  77
  78 ### Build Icarus Verilog
  79
  80     cd iverilog
  81     git checkout v11_0
  82     sh autoconf.sh
  83     ./configure --prefix=/usr/local/symbiflow/iverilog
  84     make -j$(nproc)
  85     make check
  86     make install
  87     export PATH=/usr/local/symbiflow/iverilog/bin:$PATH
  88     cd ..
  89
  90 ## Steps to compile Yosys
  91
  92 ### Necessary software to install
  93
  94     apt-get install -y cmake
  95     apt-get install -y python3 clang libreadline-dev gawk tcl-dev \
  96     libffi-dev pkg-config libboost-system-dev libboost-python-dev \
  97     libboost-filesystem-dev zlib1g-dev
  98
  99 ### Build Yosys
 100
 101     cd abc
 102     git checkout 4f5f73d18b137930fb3048c0b385c82fa078db38
 103     cd ../yosys
 104     git checkout f44110c62561b21fa673f44d8e115c3ee70d2900
 105     ln -s ../abc .
 106     make -j $(nproc) PREFIX=/usr/local/symbiflow/yosys
 107     make PREFIX=/usr/local/symbiflow/yosys install
 108     install -d -m 0755 /usr/local/symbiflow/share
 109     ln -s ../yosys/share/yosys /usr/local/symbiflow/share
 110     export PATH=/usr/local/symbiflow/yosys/bin:$PATH
 111     cd ..
 112
 113 ## Steps to compile oneTBB
 114
 115 * Note: TBB is needed for multi-threading VTR-Verilog-to-routing
 116 * If not need multi-threading do not build TBB and VTR with TBB
 117
 118 ### Necessary software to install
 119
 120     apt-get install -y libhwloc-dev
 121
 122 ### Build TBB
 123
 124     cd oneTBB
 125     git checkout v2020.3
 126     make -j$(nproc) tbb tbbmalloc tbbproxy tbbbind
 127     install -d -m 0755 /usr/local/symbiflow/oneTBB/lib
 128     cp -dpr include /usr/local/symbiflow/oneTBB
 129     install -Dm755 build/linux_*/*.so* -t /usr/local/symbiflow/oneTBB/lib
 130     cmake -DINSTALL_DIR=/usr/local/symbiflow/oneTBB/lib/cmake/TBB \
 131       -DTBB_VERSION_FILE=/usr/local/symbiflow/oneTBB/include/tbb/tbb_stddef.h \
 132       -DSYSTEM_NAME=Linux -P cmake/tbb_config_installer.cmake
 133     echo "/usr/local/symbiflow/oneTBB/lib" > /etc/ld.so.conf.d/symbiflow.conf
 134     ldconfig
 135     cd ..
 136
 137 ## Steps to compile vtr-verilog-to-routing
 138
 139 ### Necessary software to install
 140
 141     apt-get install -y libeigen3-dev
 142
 143     # Only if want GUI place and route
 144     #apt-get install libcairo2-dev libfontconfig1-dev libx11-dev libxft-dev \
 145     #libgtk-3-dev
 146
 147 ### Build vtr
 148
 149     cd vtr-verilog-to-routing
 150     git checkout 77a3df829fdf509a76b9d7b941376f3835c2576a
 151     mkdir build; cd build
 152     cmake -DCMAKE_INSTALL_PREFIX=/usr/local/symbiflow/vtr ..
 153     make -j $(nproc)
 154     make install
 155     install -d -m 0755 /usr/local/symbiflow/share/vtr
 156     install -m 0644 ../libs/libvtrcapnproto/gen/rr_graph_uxsdcxx.capnp \
 157       /usr/local/symbiflow/share/vtr
 158     export PATH=/usr/local/symbiflow/vtr/bin:$PATH
 159     cd ../..
 160
 161 ### Build vtr-tbb
 162
 163     cd vtr-verilog-to-routing
 164     git checkout 77a3df829fdf509a76b9d7b941376f3835c2576a
 165     mkdir build-tbb; cd build-tbb
 166     cmake -DCMAKE_INSTALL_PREFIX=/usr/local/symbiflow/vtr-tbb \
 167       -DTBB_INCLUDE_DIR=/usr/local/symbiflow/oneTBB/include \
 168       -DTBB_LIBRARY=/usr/local/symbiflow/oneTBB/lib -DBUILD_TYPE=Release ..
 169     LIBRARY_PATH=/usr/local/symbiflow/oneTBB/lib make -j $(nproc)
 170     LIBRARY_PATH=/usr/local/symbiflow/oneTBB/lib make install
 171     install -d -m 0755 /usr/local/symbiflow/share/vtr
 172     install -m 0644 ../libs/libvtrcapnproto/gen/rr_graph_uxsdcxx.capnp \
 173       /usr/local/symbiflow/share/vtr
 174     # Choose either one of path for vtr-binaries
 175     # This one or above one
 176     #export PATH=/usr/local/symbiflow/vtr-tbb/bin:$PATH
 177     cd ../..
 178
 179 ## Steps to compile libxml2
 180
 181 * Newer version is needed which fixes a integer overflow error and is not
 182   provided by Buster.
 183
 184 ### Necessary software to install
 185
 186     apt-get install -y python3-dev
 187
 188 ### Build libxml2
 189
 190     tar -xf libxml2-2.9.12.tar.gz
 191     cd libxml2-2.9.12
 192     ./configure --prefix=/usr/local/symbiflow/libxml2 --with-history \
 193       --with-python=/usr/bin/python3
 194     make -j $(nproc)
 195     make install
 196     echo "/usr/local/symbiflow/libxml2/lib" >> /etc/ld.so.conf.d/symbiflow.conf
 197     ldconfig
 198     export PATH=/usr/local/symbiflow/libxml2/bin:$PATH
 199     cd ..
 200
 201 ## Steps to compile libxslt
 202
 203 * Needed by python3 lxml
 204
 205 ### Build libxslt
 206
 207     tar -xf libxslt-1.1.34.tar.gz
 208     cd libxslt-1.1.34
 209     sed -i s/3000/5000/ libxslt/transform.c doc/xsltproc.{1,xml}
 210     sed -i -r '/max(Parser)?Depth/d' ./tests/fuzz/fuzz.c
 211     ./configure --prefix=/usr/local/symbiflow/libxslt --disable-static \
 212       --without-python \
 213        PKG_CONFIG_PATH=/usr/local/symbiflow/libxml2/lib/pkgconfig
 214     make -j $(nproc)
 215     make install
 216     echo "/usr/local/symbiflow/libxslt/lib" >> /etc/ld.so.conf.d/symbiflow.conf
 217     ldconfig
 218     export PATH=/usr/local/symbiflow/libxslt/bin:$PATH
 219     cd ..
 220
 221 ## Steps to compile prjxray
 222
 223 ### Necessary software to install
 224
 225 ### Build prjxray
 226
 227     cd prjxray
 228     git checkout f7f06896ad26bb7c94680dc323d4b871eded1f4e
 229     git submodule update --init --recursive
 230     mkdir build; cd build
 231     cmake -DCMAKE_INSTALL_PREFIX=/usr/local/symbiflow ..
 232     make -j$(nproc)
 233     make install
 234     export PATH=/usr/local/symbiflow/bin:$PATH
 235     cd ../..
 236
 237 ## Steps to compile yosys-symbiflow-plugins
 238
 239 ### Necessary software to install
 240
 241 ### Build yosys-symbiflow-plugins
 242
 243     cd yosys-symbiflow-plugins
 244     git checkout b170f1d3575568d87901422f846b700169e299be
 245     sed -i -e 's@-include third_party/make-env/conda.mk@#-include third_party/make-env/conda.mk@' Makefile
 246     make -j$(nproc)
 247     make install
 248     cd ..
 249
 250 ## Steps to compile prjxray-db
 251
 252 ### Install prjxray-db
 253
 254     cd prjxray-db
 255     git archive --format=tar --prefix=prjxray-db/ \
 256       cd41f08a8a4d2a60053750a0fe10623b1e2e35da | \
 257       tar -C /usr/local/symbiflow -xf -
 258
 259     cat > /usr/local/symbiflow/bin/prjxray-config << EOF
 260     #!/bin/bash
 261     echo /usr/local/symbiflow/prjxray-db
 262     EOF
 263
 264     chmod +x /usr/local/symbiflow/bin/prjxray-config
 265     cd ..
 266
 267 ## Steps to compile Icestorm
 268
 269 ### Necessary software to install
 270
 271     apt-get install -y libftdi-dev
 272
 273 ### Build Icestorm
 274
 275     cd icestorm
 276     git checkout 83b8ef947f77723f602b706eac16281e37de278c
 277     make -j $(nproc) PREFIX=/usr/local/symbiflow/icestorm
 278     make PREFIX=/usr/local/symbiflow/icestorm install
 279     cd ..
 280
 281 ## Steps to compile capnproto
 282
 283 ### Necessary software to install
 284
 285     apt-get install -y automake autoconf libtool
 286
 287 ### Build capnproto
 288
 289     cd capnproto
 290     git checkout v0.8.0
 291     cd c++
 292     autoreconf -i
 293     ./configure --prefix=/usr/local/symbiflow/capnproto
 294     make -j $(nproc)
 295     make install
 296     echo "/usr/local/symbiflow/capnproto/lib" >> /etc/ld.so.conf.d/symbiflow.conf
 297     ldconfig
 298     export PATH=/usr/local/symbiflow/capnproto/bin:$PATH
 299     cd ../..
 300
 301 ## Steps to compile pycapnp
 302
 303 ### Necessary software to install
 304
 305     apt-get install -y python3-pip cython3
 306
 307 ### Build pycapnp
 308
 309     cd pycapnp
 310     git checkout v1.0.0b1
 311     pip3 install .
 312     cd ..
 313
 314 ##  Git checkout python-fpga-interchange
 315
 316     cd python-fpga-interchange
 317     git checkout 1959b40e998db987c604c0a75664ccb209df13f7
 318     cd ..
 319
 320 ##  Git checkout quicklogic-fasm-utils
 321
 322     cd quicklogic-fasm-utils
 323     git checkout 3d6a375ddb6b55aaa5a59d99e44a207d4c18709f
 324     cd ..
 325
 326 ##  Git checkout quicklogic-fasm
 327
 328     cd quicklogic-fasm
 329     git checkout ee546ff09b2ee25894db3f419366afaf3c4bfe32
 330     cd ..
 331
 332 ## Steps to compile symbiflow-arch-defs
 333
 334 ## Necessary software to install
 335
 336     apt-get install -y nodejs npm python-pytest openocd flake8 python3-numpy \
 337       python3-intervaltree python3-simplejson python3-intelhex \
 338       python3-importlib-metadata python3-jsonschema python3-packaging \
 339       python3-pyparsing python3-pyrsistent python3-tqdm python3-zipp \
 340       python3-typing-extensions python3-ply
 341
 342     pip3 install textx fasm pyjson5 pyyaml tinyfpgab tinyprog pyjson lxml \
 343       progressbar2 hilbertcurve==1.0.5 python-constraint parameterized \
 344       yapf==0.26.0 python-sat
 345
 346 ### Build symbiflow
 347
 348     cd symbiflow-arch-defs
 349     git checkout c2c0f00960baf538eb31e4c42bf5d09dca87bad7
 350     git submodule init
 351     git submodule update --init --recursive
 352     pip3 install ../python-fpga-interchange
 353     pip3 install -e third_party/prjxray
 354     pip3 install -e third_party/xc-fasm
 355     pip3 install ../quicklogic-fasm-utils
 356     pip3 install ../quicklogic-fasm
 357     pip3 install -e third_party/qlf-fasm
 358     pip3 install -e quicklogic/common/utils/quicklogic-timings-importer
 359     pip3 install -e third_party/vtr-xml-utils
 360     pip3 install -e third_party/python-symbiflow-v2x
 361     pip3 install -e third_party/python-sdf-timing
 362     pip3 install -e third_party/symbiflow-xc-fasm2bels
 363
 364     mkdir -p env/conda/envs
 365     ln -s /usr/local/symbiflow env/conda/envs/symbiflow_arch_def_base
 366
 367     sed -i -e 's@add_subdirectory(litex)@#add_subdirectory(litex)@g' \
 368       -e 's@add_subdirectory(ibex)@#add_subdirectory(ibex)@g' \
 369       xc/xc7/tests/soc/CMakeLists.txt
 370
 371 ### Build symbiflow-arch-defs-xc7-artix7-100t
 372
 373     export VPR_NUM_WORKERS=$(nproc)
 374
 375     mkdir build; cd build
 376     cmake -DUSE_CONDA=FALSE -DPRJXRAY_DB_DIR=/usr/local/symbiflow/prjxray-db \
 377       -DINSTALL_FAMILIES=xc7 -DINSTALL_ARCHS=artix7_100t \
 378       -DINSTALL_DEVICES=xc7a100t -DCMAKE_INSTALL_PREFIX=/usr/local/symbiflow ..
 379     cd xc/xc7/archs/artix7_100t
 380     make install
 381     cd ../..
 382     make PINMAP_INSTALL_arty100t-full_xc7a100t_test_arty100t-full_pinmap.csv
 383     install -d -m 0755 /usr/local/symbiflow/share/symbiflow/arch/xc7a100t_test/xc7a100tcsg324-1
 384     install -m 0644 arty100t-full_pinmap.csv /usr/local/symbiflow/share/symbiflow/arch/xc7a100t_test/xc7a100tcsg324-1/pinmap.csv
 385
 386     # Now you can skip to symbiflow-examples.git for external test
 387
 388     # To do builtin counter test; it should build top.bit as final bitstream
 389     cd tests/counter
 390     make counter_arty100t_bit
 391
 392     # see file counter_arty100t/artix7_100t-xc7a100t-virt-xc7a100t-test/top.bit
 393     # it is the bitstream file and if built then success
 394
 395     cd ../../../../..
 396
 397 ### Build symbiflow-arch-defs-xc7-artix7 (xc7a50t)
 398
 399 "If you do not want this target skip"
 400
 401     export VPR_NUM_WORKERS=$(nproc)
 402
 403     mkdir build_artix7; cd build_artix7
 404     cmake -DUSE_CONDA=FALSE -DPRJXRAY_DB_DIR=/usr/local/symbiflow/prjxray-db \
 405       -DINSTALL_FAMILIES=xc7 -DINSTALL_ARCHS=artix7_100t \
 406       -DINSTALL_DEVICES=xc7a50t \
 407       -DCMAKE_INSTALL_PREFIX=/usr/local/symbiflow ..
 408     cd xc/xc7/archs/artix7
 409     make install
 410     cd ../..
 411     make PINMAP_INSTALL_arty-full_xc7a50t_test_arty-full_pinmap.csv
 412     install -d -m 0755 /usr/local/symbiflow/share/symbiflow/arch/xc7a50t_test/xc7a50tfgg484-1
 413     install -m 0644 arty-full_pinmap.csv /usr/local/symbiflow/share/symbiflow/arch/xc7a50t_test/xc7a50tfgg484-1/pinmap.csv
 414     install -d -m 0755 /usr/local/symbiflow/share/symbiflow/arch/xc7a50t_test/xc7a35tcsg324-1
 415     ln -s ../xc7a50tfgg484-1/pinmap.csv /usr/local/symbiflow/share/symbiflow/arch/xc7a50t_test/xc7a35tcsg324-1
 416
 417     # Now you can skip to symbiflow-examples.git for external test
 418
 419     # To do builtin counter test; it should build top.bit as final bitstream
 420     cd tests/counter
 421     make counter_arty100t_bit
 422
 423     # see file counter_arty/artix7-xc7a50t-arty-swbut-roi-virt-xc7a50t-arty-swbut-test/top.bit
 424     # it is the bitstream file and if built then success
 425
 426     cd ../../../../../..
 427
 428 ## Steps to compile symbiflow-examples
 429
 430 ### Build counter test for arty_100
 431
 432     cd symbiflow-examples
 433     git checkout 07a6353627e0b6083728d1022ce30f9093d4c2de
 434
 435     cd xc7
 436     TARGET="arty_100" make -C counter_test
 437
 438     # Should produce top.bit bitstream
 439     # see file counter_test/build/arty_100/top.bit
 440
 441 ### Build counter test for arty_35
 442
 443     TARGET="arty_35" make -C counter_test
 444
 445     # Should produce top.bit bitstream
 446     # see file counter_test/build/arty_/top.bit
 447
 448 ### Build picosoc demo for arty_100
 449
 450     TARGET="arty_100" make -C picosoc_demo
 451
 452     # Should produce top.bit bitstream
 453     # see file picosoc_demo/build/arty_100/top.bit
 454
 455 ### Build picosoc demo for arty_35
 456
 457     TARGET="arty_35" make -C picosoc_demo
 458
 459     # Should produce top.bit bitstream
 460     # see file picosoc_demo/build/arty_35/top.bit
 461
 462 ### Build Linux Litex Demo for arty_100
 463
 464     TARGET="arty_100" make -C linux_litex_demo
 465
 466     # Should produce top.bit bitstream
 467     # see file linux_litex_demo/build/arty_100/top.bit
 468
 469 ### Build Linux Litex Demo for arty_35
 470
 471     TARGET="arty_35" make -C linux_litex_demo
 472
 473     # Should produce top.bit bitstream
 474     # see file linux_litex_demo/build/arty_35/top.bit
 475
 476     cd ../..
 477
 478 ## Steps to compile symbiflow-examples Litex
 479
 480 ### Get Litex
 481
 482     mkdir litex
 483     cd litex
 484
 485     git clone https://github.com/m-labs/migen
 486     git clone https://github.com/litex-hub/pythondata-software-compiler_rt
 487     git clone https://github.com/enjoy-digital/litex
 488     git clone https://github.com/enjoy-digital/litedram
 489     git clone https://github.com/enjoy-digital/liteeth
 490     git clone https://github.com/enjoy-digital/liteiclink
 491     git clone https://github.com/enjoy-digital/litesdcard
 492     git clone https://github.com/litex-hub/litespi
 493     git clone https://github.com/litex-hub/litex-boards
 494     git clone https://github.com/litex-hub/pythondata-cpu-picorv32
 495     git clone https://github.com/litex-hub/pythondata-cpu-vexriscv
 496     git clone https://github.com/litex-hub/pythondata-software-picolibc.git
 497
 498 ### Build Litex
 499
 500 "Git Commits"
 501
 502     migen=6e3f8e565704b4293174aedfb15b3470d233f528
 503     pythondata-software-compiler_rt=fcb03245613ccf3079cc833a701f13d0beaae09d
 504     litex=db20cb172dc982c5879aa8080ec7aa18de181cc5
 505     litedram=1d5192f572c2eb97bc85eb56667e25dc88d725f1
 506     liteeth=8ecc3ca6d9476dd1a8b32b2b6bf3584cd6dcfc02
 507     liteiclink=3d8ecdbcf9f0260292221ff63b0ad3f5e409a955
 508     litesdcard=4edf05e627a8b5f03e632215accec8ab588737e3
 509     litespi=4cb907881bb75999e4c6bb68e211dd5cfc301de9
 510     litex-boards=9e18d9bc34bafb18839512a55dc66ba62e0d4824
 511     pythondata-cpu-picorv32=2e8be513726fb6ffd960f7e18d24e3a86d895107
 512     pythondata-cpu-vexriscv=c4eca1837ebca20b637a0a61e3a93d9446488459
 513     pythondata-software-picolibc=e27c8a7ef8a8e75b6474823aae338efb1a2ca1a9
 514
 515     for pkg in migen pythondata-software-compiler_rt litex litedram \
 516                liteeth liteiclink litesdcard litespi litex-boards \
 517                pythondata-cpu-picorv32 pythondata-cpu-vexriscv \
 518                pythondata-software-picolibc; do
 519      cd "$pkg"
 520      eval git checkout $`echo $pkg`
 521      pip3 install -e .
 522      cd ..
 523     done
 524
 525 #### Build Litex Demo
 526
 527     cd litex-boards
 528
 529     # Arty 100T Picorv32
 530     ./litex_boards/targets/digilent_arty.py --toolchain=symbiflow \
 531       --cpu-type=picorv32 --sys-clk-freq 80e6 --variant a7-100 \
 532       --output-dir build/picorv32/arty_100 --build --no-compile-software
 533     # see file build/picorv32/arty_100/gateware/digilent_arty.bit
 534     # this is the built bitstream
 535
 536     # Arty 100T VexRiscv
 537
 538     ./litex_boards/targets/digilent_arty.py --toolchain=symbiflow \
 539       --cpu-type=vexriscv --sys-clk-freq 80e6 --variant a7-100 \
 540       --output-dir build/vexriscv/arty_100 --build --no-compile-software
 541     # see file build/vexriscv/arty_100/gateware/digilent_arty.bit
 542     # this is the built bitstream
 543
 544     # Arty 35T Picorv32
 545
 546     ./litex_boards/targets/digilent_arty.py --toolchain=symbiflow \
 547       --cpu-type=picorv32 --sys-clk-freq 80e6 --variant a7-35 \
 548       --output-dir build/picorv32/arty_35 --build --no-compile-software
 549     # see file build/picorv32/arty_35/gateware/digilent_arty.bit
 550     # this is the built bitstream
 551
 552     # Arty 35T VexRiscv
 553
 554     ./litex_boards/targets/digilent_arty.py --toolchain=symbiflow \
 555       --cpu-type=vexriscv --sys-clk-freq 80e6 --variant a7-35 \
 556       --output-dir build/vexriscv/arty_35 --build --no-compile-software
 557     # see file build/vexriscv/arty_35/gateware/digilent_arty.bit
 558     # this is the built bitstream
 559