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YosysHQ

YosysHQ

Matt Venn

Interviews from the world of Open Source EDA tools

5 - Aleksy Wavedrom
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  • 5 - Aleksy Wavedrom

    Aleksy Wavedrom

    Thu, 10 Jun 2021 - 40min
  • 4 - Andrew Zonenberg
    00:00 Andrew Zonenberg Introduction
    01:48 Where did your interest in HW security come from?
    04:12 What’s the difference between FPGA & ASIC development?
    05:45 FPGA experience
    06:00 UNIX style OS for PICs
    08:35 PCB checklist https://github.com/azonenberg/pcb-checklist
    09:35 What's your motivation for your work on high speed electronics
    11:17 One goal of Andrew’s is to replace some Cisco switches with his own design
    12:12 Where are the challenges in building a high speed switch like this?
    13:52 How do you get something like this to work first time?
    15:40 Sonnet for simulation https://www.sonnetsoftware.com/ 
    16:55 OpenEMS https://openems.de/start/ 
    18:08 Is it possible to build an intuition for high speed layout? 
    20:43 New lab toys
    24:22 Andrew’s work on scope probes
    25:12 Signal path review of AKL-PT1 https://www.youtube.com/watch?v=eZhMIR0l3xU 
    26:30 Buy a probe from Elegant Invention: https://shop.elegantinvention.com/collections/antikernel-labs 
    27:00 AKL-PT2 - solder on version
    29:05 What’s the cheapest bit of kit for signal integrity
    30:45 Tips on 2nd hand tools
    33:12 Andrew’s preference is equipment that is no longer manufactured but still in support
    35:00 Sampling scope for repetitive signals - eye diagrams
    35:40 Ted Yapo’s super con talk on sampling scopes: https://www.youtube.com/watch?v=99u53V7uDFY 
    36:54 Sampling scopes could be cheaper solution for entry level signal integrity
    37:08 Freesample: https://github.com/azonenberg/freesample 
    38:30 Explanation of how a sampling scope works
    41:47 glscopeclient: https://github.com/azonenberg/scopehal-apps 
    45:35 glscopeclient roadmap
    50:30 probono or discounted services for open hardware projects
    53:09 contacting Andrew https://twitter.com/azonenberg
    Tue, 04 May 2021 - 54min
  • 3 - Piotr Esden-Tempski
    00:00 Introducing Esden
    00:58 Unnamed RE podcast https://unnamedre.com/episode/44 
    01:43 top level overview of the Glasgow board
    03:51 FPGA tools integrated into Glasgow tools
    06:20 USB speed optimisation
    06:30 Talk by Attie Grande https://fosdem.org/2021/schedule/event/glasgow/
    08:03 Comments in Glasgow code
    09:03 Update on Glasgow Crowd Supply
    10:15 Shortage of ICs, impacting Blackmagic Probe
    12:07 Having to place orders for Glasgow from manufacturers
    13:42 iCEBreaker FPGA board
    18:50 Piggybacked RAM
    19:29 Doom on iCE40 by Sylvain Munaut
    21:00 Underestimating possibilities of small FPGAs
    24:56 What role do the Open Source EDA tools play in your business
    29:30 Brief history of 1 Bit Squared
    32:01 Black Magic Probe still supported?
    37:57 1 Bit Squared expanding
    38:10 Esden’s thoughts on community
    41:51 Work by Sophi Kravitz and others on Hackaday Supercon
    42:42 Adafruit community
    43:30 Common problem is too much leeway, being afraid to say stop
    45:05 Human stuff is part of technical stuff
    
    Follow Piotr on twitter here: https://twitter.com/esden
    Wed, 31 Mar 2021 - 49min
  • 2 - Al Wood
    00:00 Introducing Al
    01:26 Discovering Yosys
    02:51 Lattice hx8k
    04:58 OSHUG
    05:47 The Coal Hole
    06:15 OSHcamp workshop
    06:55 Blackice memory & co-processor
    07:34 FTDI tax
    11:30 Raspberry Pi as programmer
    13:50 HX4K with Yosys
    15:00 sram chip - retro computing
    16:10 Mystorm Forum
    18:34 BBC Atom & Micro
    20:13 What would you do to get more people interested in FPGAs
    22:49 Verilog is a double edged sword
    23:04 Higher level HDLs - nMigen
    27:27 nMigen has built in support for Formal Verification
    27:50 Glasgow & nMigen
    28:40 nMigen support on myStorm boards
    29:14 what’s been the impact of OSS on your professional and personal life
    29:45 XMOS
    31:05 Transputer
    34:37 Interrupts are bad
    37:00 building your own processors in FPGAs
    38:49 where do you see FPGA tools in 5 years
    43:02 Raspberry Pi RP2040 PIOs
    48:30 New FPGA architectures
    49:20 How to get in touch with Al
    40:31 Streams on a Wednesday 8pm GMT http://twitch.tv/folknology
    50:20 ecp5 based FPGA myStorm board incoming
    Mon, 15 Mar 2021 - 51min
  • 1 - Olof Kindgren
    00:00 Introducing Olof Kindgren
    01:03 FOSSi
    02:34 ORConf
    04:41 FOSSi Dial-Up: https://www.fossi-foundation.org/dial-up/
    06:20 75% of people who taped-out were software engineers
    06:40 LibreCores
    08:30 LibreCores vs OpenCores
    09:31 Community building
    10:53 SERV - an award winning RISC V processor
    12:33 What is a bit serial core
    13:43 Creativity award
    14:02 CORE SCORE!
    15:45 Corey
    18:14 Olof doesn’t have enough FPGA boards
    18:41 Documentation week
    19:20 SERV documentation
    20:06 How is Open Source shaping the EDA world
    22:12 Engineering time is expensive
    23:28 Fixing bugs in Open Source toolchains
    25:25 no Formal Verification tools
    26:17 GHDL
    26:34 Yosys is an amazing synthesis tool
    28:15 Bridging between proprietary and Open Source tools
    28:35 Cocotb
    29:48 Presenting the best interviewee award
    
    Follow Olof on twitter: https://twitter.com/OlofKindgren
    Mon, 15 Mar 2021 - 30min