Cynthion Delivery Timeline Update
Note: This is a crosspost of a Cynthion update on Crowd Supply: https://www.crowdsupply.com/great-scott-gadgets/cynthion/updates/cynthion-delivery-timeline-update
Hello, campaign backers and other supporters of Cynthion and Great Scott Gadgets! In this update, we hoped to tell you that manufacturing was in progress and that we were getting close to delivering the first Cynthions to you. Unfortunately, we have encountered more delays while getting the hardware ready to go to manufacturing.
The first delay was caused by another component availability barrier, which is now solved. After our last hardware update, we placed an order with our contract manufacturer for the additional components added to the Cynthion hardware...
GSoC23 — Workweek 9
Introduction
As a reminder, last time I wrote about the issue when multiple functors are connected to a single source. In that case it is unclear to which of the functors the interconnect path must be annotated.
This week I have spent some time in VVP to find out how to add input and output buffers to modules, so that this ambiguity can be solved.
I was also writing smaller tests to make sure that the implementation I am working on is functioning correctly, and to find out what situations are not annotated correctly.
VVPMy goal is to add input and output buffers to...
GSoC23 — Workweek 8
Introduction
I am currently in the middle of implementing the SDF INTERCONNECT feature and while there was fast progress early on things have now stalled.
What is the issue? Let me explain this by showing you how I intended to annotate the design.
Interconnect - VPIWe start at the VPI side, where $sdf_annotate is called to start the process of SDF annotation. Once a INTERCONNECT token is parsed, we call sdf_interconnect_delays with the appropriate parameters.
(INTERCONNECT A0 input1.A (0.014:0.014:0.014) (0.006:0.006:0.006))
(An example of an interconnect annotation)
This function finds the port handles in the respective scopes and requests an intermodpath via vpi_handle_multi and the ports as...
GSoC23 — Workweek 7
Introduction
It's been a versatile week with a lot of stuff going on. Let's see what we got.
Introduction Delayed Signals in Timing Checks Specify blocks in SKY130 Efabless Maintained SKY130 Repositories SDF INTERCONNECT Implementation Summary Delayed Signals in Timing ChecksTo begin with, the PR to handle delayed signals in timing checks as assignments has been merged at the start of the week (PR #966).
This is great because it means if timing checks like $setuphold or $recrem are used in standard cells, the delayed signals are now correctly connected. This is important for SKY130, because until now the outputs of flip-flops and latches were just left unconnected in...
Free Stuff - June 2023
The June recipient for the Great Scott Gadgets Free Stuff Program is Daniel. Dan is planning to use the HackRF One we are sending him to run workshops in his school and with his amateur radio group. He will also be creating videos with his new HackRF One on his YouTube channel “Radio Dan ZL2DTL”. Please welcome Radio Dan to the software-defined radio community!
Notice: Fix for Firmware Compatibility Issue
It has come to our attention that Omega2 modules produced since November 2022 (date codes 2245 and later, MAC addresses starting with 88:1E:59) have an incompatibility with older builds of the v0.3.3 Omega firmware. The incompatibility in the older firmware causes a kernel panic, with the Omega2 failing to complete the boot process.
The devices work out of the box with the firmware that’s flashed during manufacturing. The problem arises when the devices are re-flashed with older builds of the v0.3.3 firmware, or customized firmware that’s based on these older builds.
This incompatibility does not affect any devices produced before November 2022.
Who...Reverse engineering Tesla 2-bus protocol
In my flat they have installed these new digital door phones running on two wires manufactured by Tesla:
I wanted to be notified when someone rings when we are not at home so I decided to reverse engineer it.
During idle, there is a voltage of about 23V which is there to power the phones as they don’t have any other power supply; during a call, the voltage drops to about 12,6V and current goes to 47mA. So I took my scope and started to measure the signal. In short, I have found, that there is some sort of digital...
Free Stuff - May 2023
The May recipient for the Great Scott Gadgets Free Stuff Program is the UCLA IEEE Wireless, RF, and Analog Project (WRAP). Participants in this club have the opportunity to learn hands-on radio engineering skills by designing, building, and testing a 2-way radio system capable of operating in the 100s of MHz. Through this project, students can learn digital and analog radio techniques like implementing filters and a mixer from discrete diodes and using coils for up/downconversion. WRAP asked for a HackRF One to aid in debugging wireless links, where they will use the HackRF One both as a modulated waveform...
GSoC23 — Workweek 6
Introduction
This week I worked on polishing PR #966. Besides that I worked on including the specify blocks to the PDK, which is already working quite well. Probably next week I will create a PR in open_pdks for that, but I still need to check a few things. I am also working on the next big feature, SDF INTERCONNECT, which has two sides to it: the VPI side and the VVP side.
Improve Parsing of Timing ChecksThe issue with timing checks is that $setuphold and $recrem are one of the few statements in Verilog where you can specify varying numbers of optional...
Nachhaltige Lieferketten – was steckt hinter diesem Hype?
Immer mehr Menschen wollen wissen, woher die Zutaten für ihr Mittagessen oder ihre Lieblingssnacks stammen. Jetzt gibt es dazu eine Möglichkeit und die nennt sich nachhaltige Lieferketten. Alles, was zum Thema Zutaten wichtig ist, lässt sich via Smartphone über einen Code auf der Packung schnell und einfach scannen. Dies ist die Idee, die hinter einem […]
Der Beitrag Nachhaltige Lieferketten – was steckt hinter diesem Hype? erschien zuerst auf RFID | Allgemeine Information | Risiken & Schutzmöglichkeiten.