soft_riscv
satcat5
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| soft_riscv | satcat5 | |
|---|---|---|
| 1 | 25 | |
| 4 | 387 | |
| - | 36.7% | |
| 0.0 | 3.8 | |
| over 2 years ago | about 2 months ago | |
| C | VHDL | |
| - | CERN Open Hardware Licence Version 2 - Weakly Reciprocal |
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soft_riscv
satcat5
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Layout of Rust's u128 and i128 changed
I needed 128-bit and 256-bit integers on an embedded project recently.
In short, it was for fixed-point digital signal processing. The raw input and output samples were int64_t. We needed to add, subtract, multiply, and accumulate these to do filtering and linear regression with no loss of precision.
Conventional bigintegers weren't an option because the target application doesn't allow heap allocation. So we rolled our own [1] stack-allocated, fixed-width big integer class.
[1] https://github.com/the-aerospace-corporation/satcat5/blob/ma...
- Show HN: SatCat5, the open-source FPGA Ethernet switch
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CRC32 algorithm match value between 96 bit wide data bus and 24 bit wide data bus
And here's an open-source implementation I wrote a few years back. You can skip the part at the end that handles variable-length trailing bytes, since you have a fixed-width input.
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Questions about lattice ecp5 fpga.
My SatCat5 project also has a few options. Anything under src/vhdl/common/cfgbus_* can be connected to AXI or Wishbone with a simple adapter.
- SatCat5: FPGA gateware that implements a low-power, mixed-media Ethernet switch
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GPSDO without VCXO?
For an all-digital solution, here's an NCO that generates an arbitrary-frequency square wave from a numeric counter.
- network switch
What are some alternatives?
verilog-ethernet - Verilog Ethernet components for FPGA implementation
verilog-wishbone - Verilog wishbone components
SpinalHDL - Scala based HDL
corundum - Open source FPGA-based NIC and platform for in-network compute
surf - A huge VHDL library for FPGA development
WARP_Core - Wilson AXI RISCV Processor Core
SBusFPGA - Stuff to put a FPGA in a SBus system (SPARCstation)
litex - Build your hardware, easily!
opentitan - OpenTitan: Open source silicon root of trust
chisel - Chisel: A Modern Hardware Design Language
basejump_stl - BaseJump STL: A Standard Template Library for SystemVerilog