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by lurk101
Tue Sep 22, 2020 12:07 am
Forum: General discussion
Topic: Poor Man's Pi Safe Backup Supply (UPS)
Replies: 42
Views: 2835

Re: Poor Man's Pi Safe Backup Supply (UPS)

The circuit is designed to run the Pi off the battery, it is designed to keep power alive for a very short period to powerdown the Pi safely and automatically in the event of power failure. Not knowing the duration of a main power interruption, it's best to design for the worst case. Assuming the c...
by lurk101
Mon Sep 21, 2020 8:57 pm
Forum: General discussion
Topic: Poor Man's Pi Safe Backup Supply (UPS)
Replies: 42
Views: 2835

Re: Poor Man's Pi Safe Backup Supply (UPS)

Looks fine on the 12V side. On the battery side you haven't got enough margin. Lithium battery safe charge range is 3.0-4.1 V. For two batteries that's 6-8.2 V. Assuming a .5 V drop across the diode you're down to 5.5-7.7 V at the input of the converter. The typical DC to DC converter requires an in...
by lurk101
Tue Sep 15, 2020 11:53 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Agreed, more or less. The ioT market might be a long term goal, but the short term target might be the server market where ARM has failed to encroach but where nVidia compute banks are all the rage.
by lurk101
Tue Sep 15, 2020 6:21 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Unless nVidia is, essentially, prepared to write off the purchase price, the transaction makes no sense if it wants to maintain an on-going business. I can see some sense in it. Bear with me a moment for a flight of fancy: Imagine that Nvidia has concluded there is only so far it can go selling GPU...
by lurk101
Tue Sep 15, 2020 1:08 am
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

ARM sold. https://www.bbc.co.uk/news/technology-54142567 Sold in principal, may not yet be a regulatory done deal... Exactly. Just like what happened to Qualcomm failed acquisition of NXP. Qualcomm ends $44 billion NXP bid after failing to win China approval https://www.reuters.com/article/us-nxp-s...
by lurk101
Mon Sep 14, 2020 9:34 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

I think you could count the number of commercial products using RISC-V today on the fingers of your hands. No doubt. So? Early days yet. A final though on this topic which has veered off. It is surprising to see the resurgence of a MIPS like architecture in RISC-V! MIPS was roundly trounced by ARM ...
by lurk101
Mon Sep 14, 2020 9:19 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Well, it hasn't reached the level of mind share and adoption at the engineering level yet.. with the folks that actual design and build gadgets using SoCs. You know, the less ideological who like to get things done. You mean less ideological folks who like to get things done like: Nvidia : https://...
by lurk101
Mon Sep 14, 2020 8:57 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

In terms of self-perpetuating ecosystem RISC-V isn't quite there yet. Time will tell. Who says? Pretty much anybody who is anybody is a member of the RISC-V International Foundation: https://riscv.org/membership/members/ from the likes of Google, IBM, Western Digital all the way down to the Raspber...
by lurk101
Mon Sep 14, 2020 8:11 pm
Forum: C/C++
Topic: Raspberry Pi 4 SNMP
Replies: 21
Views: 494

Re: Raspberry Pi 4 SNMP

B.Goode wrote:
Mon Sep 14, 2020 3:03 pm
Rude, discourteous, time-wasting.
??? Must've missed that! You're here to make the most effective use of your time?

Got me to look into MQTT as a standard light weight replacement for the home grown message broker software I have been using.
by lurk101
Mon Sep 14, 2020 7:56 pm
Forum: C/C++
Topic: Raspberry Pi 4 SNMP
Replies: 21
Views: 494

Re: Raspberry Pi 4 SNMP

Wait, what? Sending mail via SNMP, or MQTT! Perhaps the OP got his acronyms mixed up and meant SMTP, nor SNMP. Sry, my fault. you are right, actually is SMTP. :shock: :shock: :shock: Ok, makes more sense now. You could install the Postfix mail server and use the standard mail command to send email....
by lurk101
Mon Sep 14, 2020 7:41 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Nvidia has demonstrated significant technological chops in the video/parallel processing and AI fields. Would it not make more sense for them to apply their skills to improving ARM, then licensing it as widely as possible? Squeezing the competition would only promote the rapid development of altern...
by lurk101
Mon Sep 14, 2020 6:41 pm
Forum: Off topic discussion
Topic: Happy 1.6 Gigaseconds Day!
Replies: 36
Views: 1601

Re: Happy 1.6 Gigaseconds Day!

Coming up, 0x60000000.
by lurk101
Mon Sep 14, 2020 5:03 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Here's the thing about Nvidia. Nvidia doesn't sell or manufacture chips! TSMC manufactures the silicon, other parties package them and drop-ship them to various customers. Nvidia never sees the majority of its chips. What Nvidia effectively does is license the use of its designs at the chip level wi...
by lurk101
Mon Sep 14, 2020 4:34 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Backto topic: I found NVIDIA jetson nano very funny and their tutorials taught me a lot... I am not a political person. I have lived abroad and know better than taking sides in foreign political or societal debates. But for once, for the love of Pete, understand what’s at stake. A tad melodramatic....
by lurk101
Mon Sep 14, 2020 4:00 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

davidcoton wrote:
Mon Sep 14, 2020 3:44 pm
lurk101 wrote:
Mon Sep 14, 2020 2:58 pm
jamesh wrote:
Mon Sep 14, 2020 9:41 am
The US are good at shooting themselves in the feet.
The UK has been mired in Brexit for how long now?
Problem is, UK right of centre politicians admire the US so much that they want to copy the shootings in the feet.
A growing world wide phenomenon I fear.
by lurk101
Mon Sep 14, 2020 3:49 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

I hate to admit agreeing with anything my government is doing but, despite the ham-fisted approach something had to be done about decades of IP theft. No pain, no gain.
by lurk101
Mon Sep 14, 2020 3:14 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

W. H. Heydt wrote:
Mon Sep 14, 2020 3:05 pm
jamesh wrote:
Mon Sep 14, 2020 9:41 am
The US are good at shooting themselves in the feet.
As an American, I cringe to have to say that the current US government has aimed rather higher...and keeps shooting itself in the head.
It will pass.

PS. How can you keep shooting yourself in the head? The 1st time is usually fatal.
by lurk101
Mon Sep 14, 2020 3:13 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

Reading the article...looks like its "a done deal" already..... Repercussions on the RPi ecosystem? We'll know that when the info is available... We'll know in a few years. I consider it a done deal. There's not much the UK government can or would do about it. I doubt very much Nvidia didn't consid...
by lurk101
Mon Sep 14, 2020 2:58 pm
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

jamesh wrote:
Mon Sep 14, 2020 9:41 am
The US are good at shooting themselves in the feet.
The UK has been mired in Brexit for how long now?
by lurk101
Mon Sep 14, 2020 2:37 pm
Forum: C/C++
Topic: Raspberry Pi 4 SNMP
Replies: 21
Views: 494

Re: Raspberry Pi 4 SNMP

Wait, what? Sending mail via SNMP, or MQTT! Perhaps the OP got his acronyms mixed up and meant SMTP, nor SNMP.
by lurk101
Mon Sep 14, 2020 8:13 am
Forum: Off topic discussion
Topic: ARM sold to Nvidia
Replies: 85
Views: 3990

Re: ARM sold to Nvidia

rimrunner wrote:
Mon Sep 14, 2020 7:45 am
"It's one of the fundamental assumptions of the ARM business model that it can sell to everybody,"
We sell to everyone, and charge whatever we please.

Should give a nice boost RISC-V development funding.
by lurk101
Fri Sep 11, 2020 7:20 pm
Forum: C/C++
Topic: C GPIO library
Replies: 68
Views: 90409

Re: C GPIO library

Heater wrote:
Fri Sep 11, 2020 5:54 pm
Apparently everyone can whine and complain, nobody has turned up to actually do some work on it and help. Why expect one guy to put in a lot of time and effort, for free, to provide everything your heart desires?
Not an uncommon complaint and the soft underbelly of open source.
by lurk101
Fri Sep 11, 2020 7:12 pm
Forum: General discussion
Topic: HIFI DAC HAT keeps losing sound on Volumio
Replies: 3
Views: 159

Re: HIFI DAC HAT keeps losing sound on Volumio

If it's the Innomaker HIFI DAC Hat, forum indications are that it will work with the Official Volumio using the the ALLO BOSS I2S setting. Worth a try.
by lurk101
Fri Sep 11, 2020 3:24 am
Forum: C/C++
Topic: C GPIO library
Replies: 68
Views: 90409

Re: C GPIO library

Both the WiringPi and bcm2835 libraries are very usable. I prefer the latter as it provides more direct control instead of figuring out things for you, but that is strictly a matter of personal preference.
by lurk101
Fri Sep 11, 2020 3:08 am
Forum: C/C++
Topic: Questions about porting from C to C++
Replies: 49
Views: 1314

Re: Questions about porting from C to C++

I should have been more explicit. Clang's license allows for commercial use of its machine code generation back-end. The LLVM library can be and is used commercially, an important differentiator. GPL denies such use.

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