YosysHQ: Recent Episodes
Matt Venn
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
``` 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 ```
``` 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 ```
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