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[> Changes since 2022.08
------------------------
[> Issues resolved
------------------
[> Added Features
-----------------
[> API changes/Deprecation
--------------------------
[> 2022.08, released on September 12th 2022
-------------------------------------------
[> Issues resolved
------------------
- cpu/vexriscv: Fix compilation with new binutils.
- soc/LiteXSocArgumentParser: Fix --cpu-type parsing.
- litex_sim: Fix --with-ethernet.
- liblitesdcard: Fix SDCard initialization corner cases.
- liblitedram: Enable sdram_init/mr_write for SDRAM.
- export/get_memory_x: Replace SPIFlash with ROM.
- soc/cores/video: Fix operation with some monitors (set data to 0 during blanking).
- tools/remote/comm_usb: Fix multi-word reads/writes.
- build/lattice/oxide: Fix ES posfix on device name.
- interconnect/axi: Fix AXIArbiter corner case.
- litex_server/client: Fix remapping over CommPCIe.
- LitePCIe: Fix LiteUART support with multi-boards.
[> Added Features
-----------------
- litex_setup: Add -tag support for install/update.
- tools: Add initial LiteX standalone SoC generator.
- cores/ram: Add Xilinx's FIFO_SYNC_MACRO equivalent.
- LitePCIe: Always use 24-bit depth fields on LitePCIeBuffering to simplify software.
- gen/fhdl: Integrate Migen namer to give us more flexibility.
- fhdl/memory: Prefix memory files with build name to simplify reuse/integration.
- cpu/rocket: Add more variants.
- cores/video: Enable driving both + and - diff outs to compensate hardware issues.
- build: Add intial OSFPGA Foedag/Raptor build backend.
- cpu/cva5: Add initial CVA5 CPU support (ex Taiga).
- LiteSATA: Add IRQ and Identify support.
- clock/intel: Improve to find the best PLL config.
- cpu/cva6: Add initial CVA6 CPU support (ex Ariane).
- bios: Improve config flags.
- tools: Add I2s/MMCM support to litex_json2dts_zephyr.
- clock/gowin: Add GW2A support.
- bios: Disable LTO (does not work in all cases, needs to be investigated).
- CI: Test more RISC-V CPUs and OpenRisc CPUs in CI.
- bios: Add CONFIG_NO_BOOT to allow disabling boot sequence.
- export: Allow disabling CSR_BASE define in csr.h.
- build/openocd: Update for compatibility with upstream OpenOCD.
- cpu/openc906: Add initial OpenC906 support (open version of the Allwinner's D1 chip).
- soc: Add automatic bridging between AXI <-> AXI-Lite <-> Wishbone.
- soc: Add AXI-Full bus support.
- interconnect: Add AXI DownConverted and Interconnect/Crossbar.
- interconnect: Create axi directory and split code.
- soc: Modify SoC finalization order for more flexibility.
- soc: Add --bus-interconnect parameter to select interconect: shared/crossbar.
- valentyusb: Package and install it with LiteX.
- bios/mem_list: Align Mem Regions.
- build: Introduce GenericToolchain to cleanup/simplify build backends.
- soc/etherbone: Expose broadcast capability.
- build/lattice: Add MCLK frequency support.
- cpu/cva6: Add IRQ support.
- cores/clock: Add manual placement support to ECP5PLL.
- cores/leds: Add polarity support.
- cpu/neorv32: Switch to new NeoRV32 LiteX Core Complex and add variants support.
- cores/gpio: Add optional reset value.
- litex_client: Add --host support for remote operation.
- sim/verilator: Add jobs number support (to limit RAM usage with large SoCs/CPUs).
- soc/SocBusHandler Add get_address_width method to simplify peripheral integration.
- bios: Expose BIOS console parameters (to enable/disable history/autocomplete).
- bios: Expose BIOS LTO configuration.
- litex_json2renode: Update.
- build: Introduce YosysNextPNRToolchain to cleanup/simplify Yosys support.
- bios: Add buttons support/command.
- litex_client: Add XADC/Identifier/Leds/Buttons support to GUI.
- cpu/NaxRiscv: Update.
- build/generic_platofrm: Add add_connector methode to allow extending connectors.
- litex_server/client: Add initial information exchange between server/client.
- LitePCIe: Improve 64-bit support.
- interconnect/axi: Add missing optional signals.
- interconnect/wishbone: Improve DownConverter efficiency.
[> API changes/Deprecation
--------------------------
- LiteX-Boards : Remove short import support on platforms/targets.
- tools: Rename litex_gen to litex_periph_gen.
- LiteX-Boards: Only generate SoC/Software headers when --build is set
- Symbiflow: Rename to F4PGA.
- mkmsscimg: Rename to crcfbigen.
[> 2022.04, released on May 3th 2022
------------------------------------
[> Issues resolved
------------------
- software/bios/mem_write: Fix write address increment.
- software/liblitedram: Improve calibration corner case on 7-series (SDRAM_PHY_DELAY_JUMP).
- software/liblitedram: Fix delay reconfiguration issue on ECP5/DDR3.
- cores/jtag: Fix chain parameter on XilinxJTAG.
- soc/arguments: Fix l2_size handling.
- cpu/vexriscv_smp: Fix pbus_width when using direct LiteDRAM interface.
- libbase/i2c/i2c_poll: Also check for write in i2c_scan (some chips are write only).
- build/vivado: Fix timing constraints application on nets/ports.
[> Added Features
-----------------
- litex_setup: Add minimal/standard/full install configs.
- soc/arguments: Improve default/help, add parser groups.
- LiteSPI/phy: Simplify integration on targets.
- openocd/stream: Simplify ECP5 JTAG-UART/JTAGBone use.
- tools/litex_cli: Allow passing reg name to --read/--write.
- soc/add_spi_sdcard: Allow optional Tristate (useful on ULX3S).
- software/bios: Add new mem_cmd memory comparison command.
- cpu/rocket: Increase IRQ lines to 8.
- cpu/serv: Add MDU support.
- cpu/marocchino: Add initial support.
- cpu/eos_s3: Add LiteX BIOS/Bare Metal software support.
- litex_sim: Add .json support for --rom/ram/sdram-init.
- soc/add_uart: Allow multiple UARTs in the same design.
- cores/cpu: Add out-of-tree support.
- build/xilinx: Add initial Yosys/NextPnr support on Artix7 (and Zynq7000 with Artix7 fabric).
- add_source: Add optional copy to gateware directory.
- cores/jtag: Add initial JTAG-UART/JTAGBone Altera/Intel support.
- LiteScope: Add Samplerate support.
- cores/bitbang: Add optional I2C initialization by CPU.
- libliteeth/tftp: Add blocksize support an increase to 1024 bytes (allow 64MB filesize).
- soc/add_sdram: Make AXI integration more flexible (remove some specific Rocket hardcoding).
- cpu/neorv32: Add initial support (RV32I, VHDL converted to Verilog through GHDL-Yosys-synth).
- cpu/naxriscv: Add initial support (RV32IMA & RV64IMA, already able to run Linux).
- interconnect/axi: Add AXI UpConverter.
- soc/add_sdram: Allow data_width upconversion directly on AXI (avoid switching to Wishbone).
- bios/memtest: Optimize memspeed loop for better accuracy.
- build/sim: Allow custom modules to be in custom path.
- build/OpenFPGA: Add initial OpenFPGA build backend (Currently targeting SOFA chips).
- build/efinix: Add initial MIPI TX/RX support (and test on Trion/Titanium).
- cores/video: VTG improvements to support more Video chips.
- cores/xadc: Improve Zynq Ultrascale+ support.
- LiteScope: Optimize waveform upload speed.
- LitePCIe: Add LTSSM tracer capability to debug PCIe bringup issues.
- cores/hyperbus: Refactor core and improve performances (Automatic burst detection).
- cores/jtag: Add Zynq UltraScale+.
- cores/ram: Add Ultrascale+ HBM2 wrapper.
- litex_json2renode: Improve and add support for more CPUs.
- cores/cpu: Add initial FireV support.
- litex_cli: Add --csr-csv support and minimal GUI (based on DearPyGui).
- litescope_cli: Add minimal GUI (based on DearPyGui).
- build/gowin: Add powershell support.
- LitePCIe: Add initial 64-bit addressing support (Only for 64-bit datapath for now).
- software/bios: Add Main RAM test (when not pre-initialized).
- build/trellis: Enable bitstream compression on ECP5 by default.
- soc/add_etherbone: Increase buffer_depth to 16 (to improve etherbone bursting).
- builder: Add get_bios_filename/get_bitstream_filename methods to simplify targets.
- cpu/vexriscv_smp: Re-integrate Linux-on-LiteX−VexRiscv specific changes/mapping.
- tools/litex_sim: Allow RAM/SDRAM initialization from .json files (similar to hardware).
- soc/cpu: Expose optional CPU configuration parameters to users (ex VexRiscv-SMP/NaxRiscv).
- soc: Improve logs.
- build/Efinix: Add Atmel programmer.
- stream/cdc: Add optional common reset.
- LiteDRAM: Decouple DQ/DQS widths on S7DDRPHY.
- cores/ws2812: Improve timings at low sys_clk_freq.
- soc/builder: Add --no-compile (similar to --no-compile-gateware --no-compile-software).
- software/demo: Add --mem parameter to allow compilation for execution in ROM/RAM.
- cpu/naxrsicv: Add JTAG debug support.
- cores/usb_fifo: Re-implement FT245PHYSYnchronous.
- cores/jtag: Add JTAGBone/JTAG-UART support on Zynq/ZynqMP.
- interconnect/sram: Add SRAM burst support.
- liblitesata: Improve SATA init.
- soc/cpu: Improve command line listing.
- soc/cores/uart: Decouple data/address width on Stream2Wishbone.
[> API changes/Deprecation
--------------------------
- Fully deprecate SoCSDRAM/SPIFlash core (replaced by LiteSPI).
- UART "bridge" name deprecated in favor of "crossover" (already supported).
- "external" CPU class support deprecated (replaced by out-of-tree support).
- lxterm/lxserver/lxsim short names deprecated (used long litex_xy names).
- Deprecate JTAG-Atlantic support (Advantageously replaced by JTAG-UART).
[> 2021.12, released on January 5th 2022
----------------------------------------
[> Issues resolved
------------------
- software/linker: Fix initialized global variables.
- build/xilinx: Fix Ultrascale SDROutput/Input.
- cpu/rocket/crt0.s: Fix alignements.
- core/video: Fix missing ClockDomainsRenamer in specific DRAM's width case.
- mor1kx: Fix --cpu-type=None --with-ethernet case.
- build/lattice: Fix LatticeiCE40SDROutputImpl.
- soc/interconnect/axi: Fix 4KB bursts.
[> Added Features
-----------------
- integration/builder: Check if full software re-build is required when a CPU is used.
- cores/clock: Add Gowin PLL support.
- build/gowin: Add initial HyperRam support.
- build/gowin: Add differential Input/Output support.
- build/lattice: Add DDRTristate support.
- cores/gpio: Add external Tristate support.
- tools/json2dts: Make it more generic (now also used with OpenRisc/Mor1kx).
- cpu/rocket: Add SMP support (up to quad-core).
- software/bios/boot: Allow frame reception to time out (for litex_term auto-calibration).
- tools/litex_term: Add automatic settings calibration and --safe mode.
- build/quicklogic: Add initial support.
- cores/icap/7-Series: Add register read capability.
- cores/video: Add RGB565 support to VideoFrameBuffer.
- soc: Raise custom SoCError Exception and disable traceback/exception.
- soc/add_pcie: Automatically set Endpoint's endianness to PHY's endianness.
- build/efinix: Add initial Trion and Titanium support.
- fhdl/verilog: Cleanup/Simplify verilog generation.
- fhdl/memory: Cleanup/Simplify and add support for Efinix case.
- cpu/ibex: Add interrupt support.
- tools/litex_client: Add --length parameter for MMAP read accesses.
- software/bios/cpu: Add CPU tests in CI.
- litex_sim/xgmii_ethernet: Improve models.
- litex_setup: Cleanup/Simplify and switch to proper "--" commands (with retro-compat).
- cores/jtag: Add ECP5 support.
- cores/led: Add WS2812/NeoPixel core.
- cpu/femtorv: Finish integration and add variants support.
- cpu/eos-s3: Add initial support.
- build/anlogic: Add initial support.
- cpu/microwatt: Add Xilinx multiplier support.
- cpu/vexriscv/cfu: Improve integration.
- soc/interconnect: Add initial AHB support (AHB2Wishbone).
- cpu/gowin_emcu: Add initial Gowin EMCU support.
- cpu/zynq7000: Add initial BIOS/software support.
- cpu/zynq7000: Add TCL support.
- core/prbs: Add error behaviour configuration on saturation.
- software/bios: Add write size option to mem_write cmd.
- LitePCIe/phy: Cleanup 7-Series PHY integration.
- LitePCIe/dma Add LitePCIeDMAStatus module.
- LitePCIe/software: Improve kernel/user-space utilities.
- LiteDRAM/litedram_gen: Improve ECP5 support.
- LiteDRAM/phy: Add initial LPDDR5 support.
- LiteDRAM/frontend: Refactor DRAM FIFO and add optional bypass mode.
- LiteEth/core: Add 32-bit/64-bit datapath support.
- LiteEth/phy: Add 10Gbps / Xilinx XGMII support.
- LiteEth/phy: Add 1Gbps / Efinix RGMII support.
- LiteSPI/phy: Simplify SDR/DDR PHYs.
- LiteHyperBus: Add 16-bit support.
[> API changes/Deprecation
--------------------------
- software: Replace libbase with picolibc (new requirements: meson/ninja).
- amaranth: Switch from nMigen to Amaranth HDL.
[> 2021.08, released on September 15th 2021
-------------------------------------------
[> Issues resolved
------------------
- wishbone/UpConverter: Fix SEL propagation.
- cores/i2s: Fix SYNC sampling.
- BIOS/lib*: Fix GCC warnings.
- cpu/software: Fix stack alignment issues.
- cpu/blackparrot: Fix integration.
- interconnect/axi: Fix valid signal in connect_to_pads for axi lite.
- software/hw/common: Fix _csr_rd_buf/_csr_wr_buf for sizeof(buf[0]) < CSR_DW_BYTES case.
- software/soc.h: Fix interoperability with assembly.
- interconnect/stream: Fix n=1 case on Multiplexer/Demultiplexer.
- interconnect/axi: Fix BURST_WRAP case on AXIBurst2Beat.
- cpu/VexRiscv-SMP: Fix build without a memory bus.
- cpu/software: Fix CLANG detection.
- build/software: Force a fresh software build when cpu-type/variant is changed.
- cores/uart: Fix TX reset level.
- BIOS: Fix PHDR link error.
- BIOS: Fix build-id link error.
- LiteDRAM: Fix Artix7/DDR3 calibraiton at low speed.
[> Added Features
-----------------
- cores/video: Add 7-Series HDMI PHY over GTPs.
- cores/jtagbone: Allow JTAG chain selection.
- programmer: Add iCESugar programmer.
- cpu/vexriscv: Add CFU support.
- soc/controller: Add separate SoC/CPU reset fields.
- BIOS/liblitedram: Add debug capabilities, minor improvements.
- cpu/femtoRV: Add initial FemtoRV support.
- cores/uart: Cleaned-up, Add optional TX-Flush.
- cores/usb_ohci: Add initial SpinalHDL's USB OHCI support (integrated in Linux-on-LiteX-Vexriscv).
- stream: Add Gate Module.
- soc/builder: Allow linking external software packages.
- soc/software: Allow registering init functions.
- cores/ram: Add init support to Nexus LRAM.
- cores/spi: Add Manual CS Mode for bulk transfers.
- cores/VexRiscv-SMP: Make [ID]TLB size configurable.
- dts: Add GPIO IRQ support.
- programmer/DFUProg: Allow to specify alt interace and to not reboot.
- cores/clock/ecp5: Add dynamic phase adjustment signals.
- tools/litex_sim: Mode SDRAM settings to LiteDRAM's DFI model.
- build/gowin: Add AsyncResetSynchronizer/DDRInput/DDROutput implementations.
- build/gowin: Add On-Chip-Oscillator support.
- build/gowin: Add initial timing constraints support.
- build/attr_translate: Simplify/Cleanup.
- programmer/OpenFPGALoader: Add cable and freq options.
- interconnect/packet: Improve PacketFIFO to handle payload/param separately.
- clock/ecp5: Add 4-output support.
- LiteSPI: Simplified/Cleaned-up, new MMAP architecture, applied to LiteX-Boards.
- soc: Add LiteSPI integration code.
- LitePCIe: DMA/Controller Simplified/Cleaned-up.
- soc/add_cpu: Add memory mapping overrides to build log and make an exception for the CPUNone case.
- programmer: Add ECPprogProgrammer.
- soc/software: Add Random access option to memtest.
- tools: Add Renode generator script.
- tools: Add Zephyr DTS generator script.
- build/io: Add DDRTristate.
- cpu/VexRiscv: Restructure config flags for dcache/icache presence.
- litex_sim: Improve RAM/SDRAM integration and make it closer to LiteX-Boards targets.
- build/sim: Add ODDR/IDDR/DDRSTristate simulation models.
- litex_sim: Add SPIFlash support.
- LiteSPI: Add DDR support and integration in LiteX (rate=1:1, 1:2).
- build/Vivado: Make pre_synthesis/placement/routing commands similar to platform_commands.
- LiteDRAM: Refactor C code generator.
- LiteDRAM: Improve LPDDR4 support.
- LiteDRAM: Reduce ECC granularity.
[> API changes/Deprecation
--------------------------
- soc_core: --integrated-rom-file argument renamed to --integrated-rom-init.
[> 2021.04, released on May 3th 2021
------------------------------------
[> Issues resolved
------------------
- litex_term: Fix Windows/OS-X support.
- soc/USB-ACM: Fix reset clock domain.
- litex_json2dts: Various fixes/improvements.
- cores/clock: Fix US(P)IDELAYCTRL reset sequence.
- cpu/Vexriscv: Fix Lite variant ABI (has multiplier so can use rv32im).
- BIOS: Fix various compiler warnings.
- LiteSDCard: Fix various issues, enable multiblock reads/writes and improve performance.
- CSR: Fix address wrapping within a CSRBank.
- soc/add_etherbone: Fix UDPIPCore clock domain.
- stream/Gearbox: Fix some un-supported cases.
- cpu/VexRiscv-SMP: Fix build on Intel/Altera devices with specific RAM implementation.
- timer: Fix AutoDoc.
- Microwatt/Ethernet: Fix build.
- soc/software: Link with compiler instead of ld.
[> Added Features
-----------------
- Lattice-NX: Allow up to 320KB RAMs.
- BIOS: Allow compilation with UART disabled.
- litex_json2dts: Simplify/Improve and allow VexRiscv/Mor1kx support.
- BIOS/i2c: Improve cmd_i2c.
- BIOS/liblitedram: Various improvements for DDR4/LPDDR.
- cores/Timer: Add initial unit test.
- cores: Add initial JTAGBone support on Xilinx FPGAs.
- litex_term: Improve JTAG-UART support.
- litex_server: Add JTAGBone support.
- VexRiscv-SMP: Add --without-out-of-order and --with-wishbone-memory capabilities.
- BIOS: Allow specify TRIPLE with LITEX_ENV_CC_TRIPLE.
- litex_client: Add simple --read/--write support.
- OpenFPGALoader: Add flash method.
- litex_sim: Add GTKWave savefile generator.
- litex_term: Add nios2-terminal support.
- cpu/mor1kx: Add initial SMP support.
- interconnect/axi: Add tkeep support.
- cores/gpio: Add IRQ support to GPIOIn.
- cpu: Add initial lowRISC's Ibex support.
- build/xilinx/Vivado: Allow tcl script to be added as ip.
- cores/uart: Rewrite PHYs to reduce resource usage and improve readability.
- cores/pwm: Add configurable default enable/width/period values.
- cores/leds: Add optional dimming (through PWM).
- soc/add_pcie: Allow disabling MSI when not required.
- export/svd: Add constants to SVD export.
- BIOS: Allow dynamic Ethernet IP address.
- BIOS: Add boot command to boot from memory.
- cores: Add simple VideoOut core with Terminal, ColorBards, Framebuffer + various PHYs (VGA, DVI, HDMI, etc...).
- csr/EventSourceProcess: Add rising edge support and edge selection.
- soc/integration: Cleanup/Simplify soc_core/builder.
- soc/integrated_rom: Add automatic BIOS ROM resize to minimize blockram usage and improve flexibility.
- interconnect/axi: Add AXILite Clock Domain Crossing.
- cores/xadc: Add Ultrascale support.
- soc/add_ethernet: Allow nrxslots/ntxslots configuration.
- cpu/VexRiscv-SMP: Integrate FPU/RVC support.
- soc/add_csr: Add auto-allocation mode and switch to it in LiteX's code base.
- soc/BIOS: Add method to check BIOS requirements during the build and improve error message when not satisfied.
- LiteEth: Add initial timestamping support.
- litex_client: Add optional filter to --regs.
- LiteDRAM: Add LPDDR4 support.
- BIOS/netboot: Allow specifying .json file.
- cores/clock: Add initial Gowin GW1N PLL support.
- LiteSDCard: Add IRQ support.
[> API changes/Deprecation
--------------------------
- platforms/targets: Move all platforms/targets to https://github.com/litex-hub/litex-boards.
- litex_term: Remove flashing capability.
- cores/uart: Disable dynamic baudrate by default (Unused and save resources).
[> 2020.12, released on December 30th 2020
------------------------------------------
[> Issues resolved
------------------
- fix SDCard writes.
- fix crt0 .data initialize on SERV/Minerva.
- fix Zynq7000 AXI HP Slave integration.
[> Added Features
------------------
- Wishbone2CSR: Add registered version and use it on system with SDRAM.
- litex_json2dts: Add Mor1kx DTS generation support.
- Build: Add initial Radiant support for NX FPGA family.
- SoC: Allow ROM to be optionally writable (for contents overwrite over UARTBone/Etherbone).
- LiteSDCard: Improve BIOS support.
- UARTBone: Add clock domain support.
- Clocking: Uniformize reset on iCE40PLL/ECP5PLL.
- LiteDRAM: Improve calibration and add BIOS debug commands.
- Clocking: Add initial Ultrascale+ support.
- Sim: Allow dynamic enable/disable of tracing.
- BIOS: Improve memtest and report.
- BIOS: Rename/reorganize commands.
- litex_server: Simplify usage with PCIe and add debug parameter.
- LitePCIe: Add Ultrascale(+) support up to Gen3 X16.
- LiteSATA: Add BIOS/Boot integration.
- Add litex_cli to provides common RemoteClient functions: get identifier, dump regs, etc...
- LiteDRAM: Simplify BIST integration.
- Toolchains/Programmers: Improve checks/error reporting.
- BIOS: add leds command.
- SoC: Do a full reset of the SoC on reboot (not only the CPU).
- Etherbone: Improve efficiency/performance.
- LiteDRAM: Improve DDR4/DDR3 calibration.
- Build: Add initial Oxide support for NX FPGA family.
- Clock/RAM: Reorganize for better modularity.
- SPI-OPI: Various improvements for Betrusted.
- litex_json2dts: Improvements to use it with mor1kx and VexRiscv-SMP.
- Microwatt: Add IRQ support.
- BIOS: Add i2c_scan command.
- Builder: Simplify Documentation generation with --doc args on targets.
- CSR: Add documentation to EventManager registers.
- BIOS: Allow disabling timestamp for reproducible builds.
- Symbiflow: Remove workarounds on targets.
- litex_server: Simplify use on PCIe, allow direct CommXY use in scripts to bypass litex_server.
- Zynq7000: Improve PS7 configuration support (now supporting .xci/preset/dict)
- CV32E40P: Improve OBI efficiency.
- litex_term: Improve upload speed with CRC check enabled, deprecate --no-crc (no longer useful).
- BIOS: Add mem_list command to list available memory and use mem_xy commands on them.
- litex_term: Add Crossover and JTAG_UART support.
- Software: Add minimal bare metal demo app.
- UART: Add Crossover+Bridge support.
- VexRiscv-SMP: Integrate AES support.
- LitePCIe: Allow AXI mastering from FPGA (AXI-Lite and Full).
- mor1kx: Add standard+fpu and linux+fpu variants.
[> API changes/Deprecation
--------------------------
- BIOS: commands have been renamed/reorganized.
- LiteDRAM: rdcmdphase/wrcmdphase no longer exposed.
- CSR: change default csr_data_width from 8 to 32.
[> 2020.08, released on August 7th 2020
---------------------------------------
[> Issues resolved
------------------
- Fix flush_cpu_icache on VexRiscv.
- Fix `.data` section placed in rom (#566)
[> Added Features
------------------
- Properly integrate Minerva CPU.
- Add nMigen dependency.
- Pluggable CPUs.
- BIOS history, autocomplete.
- Improve boards's programmers.
- Add Microwatt CPU support (with GHDL-Yosys-plugin support for FOSS toolchains).
- Speedup Memtest using an LFSR.
- Add LedChaser on boards.
- Improve WishboneBridge.
- Improve Diamond constraints.
- Use InterconnectPointToPoint when 1 master,1 slave and no address translation.
- Add CV32E40P CPU support (ex RI5CY).
- JTAG UART with uart_name=jtag_uart (validated on Spartan6, 7-Series, Ultrascale(+)).
- Add Symbiflow experimental support on Arty.
- Add SDCard (SPI and SD modes) boot from FAT/exFAT filesystems with FatFs.
- Simplify boot with boot.json configuration file.
- Revert to a single crt0 (avoid ctr/xip variants).
- Add otional DMA bus for Cache Coherency on CPU(s) with DMA/Cache Coherency interface.
- Add AXI-Lite bus standard support.
- Add VexRiscv SMP CPU support.
[> API changes/Deprecation
--------------------------
- Add --build --load arguments to targets.
- Deprecate soc.interconnect.wishbone.UpConverter (will be rewritten if useful).
- Deprecate soc.interconnect.wishbone.CSRBank (Does not seem to be used by anyone).
- Move soc.interconnect.wishbone2csr.WB2CSR to soc.interconnect.wishbone.Wishbone2CSR.
- Move soc.interconnect.wishbonebridge.WishboneStreamingBridge to soc.cores.uart.Stream2Wishbone.
- Rename --gateware-toolchain target parameter to --toolchain.
- Integrate Zynq's PS7 as a regular CPU (zynq7000) and deprecate SoCZynq.
[> 2020.04, released on April 28th, 2020
----------------------------------------
[> Description
--------------
First release of LiteX and the ecosystem of cores!
LiteX is a Migen/MiSoC based Core/SoC builder that provides the infrastructure to easily create
Cores/SoCs (with or without CPU).
The common components of a SoC are provided directly:
- Buses and Streams (Wishbone, AXI, Avalon-ST)
- Interconnect
- Common cores (RAM, ROM, Timer, UART, etc...)
- CPU wrappers/integration
- etc...
And SoC creation capabilities can be greatly extended with the ecosystem of LiteX cores (DRAM,
PCIe, Ethernet, SATA, etc...) that can be integrated/simulated/build easily with LiteX.
It also provides build backends for open-source and vendors toolchains.
[> Issues resolved
------------------
- NA
[> Added Features
------------------
- NA
[> API changes/Deprecation
--------------------------
- https://github.com/enjoy-digital/litex/pull/399: Converting LiteX to use Python modules.