Electrical Engineering

Q: .elf or .bin file to be download as application code in ARM cortex M4

6:42 AM

"I wrote" an application. I won't tell you more. What kind of file does my application take, please?

0

I am using a MCU with ARM Cortex M4 processor. I Have written a bootloader on it. Using USB CDC ACM class, i am writting the application code in memory address 0x002000. I have generated both .elf and .bin files of the application code which i want to run through this bootloader. Which file is ...

@abdullahkahraman Not right now, ran out of meth

abdullah kahraman

7:06 AM

:)

8:55 AM

@DanielTork Yeah. One can find such basic theories with the people who are in learning state(like me).

9:16 AM

@abdullahkahraman Is @Asmyldof talking about drugs?

9:50 AM

@KrishnShweta Almost constantly. It's why I make such a well rounded and stable impression 24/7

@Asmyldof Do you mean You take drugs?

I wish they did such dumpster sales like the one dave was on, I would have bought a truckload of stuff

@PlasmaHH That's why they don't. They're protecting you from you

@KrishnShweta Only on days the sun shines

10:07 AM

@Asmyldof I have seen drugs in TV shows only. ( Never in front of my eyes)

10:26 AM

@Asmyldof more likely from my wife, in a sense ;) but really, the way this is handled usually in germany really sucks

Hm, looks like spacex exploded because of a ruptured helium tank in the 2nd stage...thought they figured out how todo that shit decades ago...

and nice, youtube is gamifying flagging videos for inapproriateness

including providing you with tools for mass flagging

1:02 PM

@PlasmaHH I'll pre-set a flagging procedure for any video you upload

@ScottSeidman You're green

FYI

@Asmyldof as if I would tell you how my youtube channel will be called (or as if I wouldknow )

@PlasmaHH I already know

@Asmyldof and you watched all the videos?

@PlasmaHH No

too bad, I would have asked if you still have them soyou could give them to me and I dont have toproduce and upload them myself

1:07 PM

@PlasmaHH Generally I don't download the YouTube videos I watched.

@Asmyldof so no downloaderplugin sothat you can view themwithout tons of ads?

@jippie beware twitter.com/Asmyldof/status/780393921847365633

@PlasmaHH Nope

I'm a business owner, I believe in capitalism and pimping out my content to advertisers, obvs

I don't mind nonannoying ads myself, but usually you are like 30s into a video and then you get some 20sec uninterruptiblead videoblargh

Scott Seidman

@Asmyldof Yup -- I actually think its related to another group I signed up for about 2 weeks ago -- pmp-art.com, where I have the same green avatar. Curiouser and Curiouser.

Scott Seidman

1:38 PM

It's not easy, being green

W5VO

@ScottSeidman Gravatar seems to be having a few issues

TenzoNakami

Hi guys!

abdullah kahraman

1:57 PM

Hello!

3:07 PM

I saw something and thought of you guys

lv92

Hi i'm new in this website.

Lesson one: Press up-arrow or use the menu to edit your messages

@MickLH daily morning routine in my family

For some reason, I just assumed that's how beers would be opened if you grouped the members of this room

lv92

I would like to make a field strength meter 2.4 Ghz for Arduino.

3:10 PM

@MickLH you are missing that pepole in this room are too socially awkward that they never will beina single room in real life

Also upon further thought, it's quite obvious we'd sonic weld all the beers into a hexagon pattern on water soluble plastic, and rip all the caps off with an insane electromagnet while flowing water across the base at just the right rate that they all clink together as the caps fly off

lv92

do you know some circuit that allow us to do it?

A tuner?

@MickLH Because the discussions on this site are about as useful and efficient as a 5 minute set-up to open 5 bottles at once?

Also everyone's dressed pretty cleanly

3:14 PM

@lv92 there are things people should not do when they have to ask about them

@MickLH What are you trying to insinuate?

I'm not sure actually... but it's definitely something in the area of "looking sharp" with some undertones of ... something that if I could express I would be more sure what I'm trying to insinuate.

Lets just call it "Unlabeled Neural Vector #?"

@MickLH That's just more of your analysis based insinuation and nothing to the general effect of actually explaining anything

I really don't know why this planet is not equipped with an emergency off button

@PlasmaHH It is, we just decided not to give one to Germany for.... obvious reasons

3:42 PM

I was definitely insinuating something, though I think it's a lost cause trying to recover that train of thought

@lv92 why don't you want to use LT5534 ?

@MickLH because of reasons

I wasn't familiar with it so I checked the datasheet... it looks like the problem is already solved lol

I don't understand why arduino people religiously avoid buying actual functional ICs hell bent on doing it themselves... but then buy proprietary retail breakout boards with something ridiculously simple like a phototransistor and one resistor on them.

Is it some kind of interpolation between masochism and dunning-kruger?

extrapolation more likely

I had a friend who spent weeks trying to develop his own glass tube pH meter for arduino from scratch... Maybe months

it can be a fun thing forlearning, but not when you want something todo

3:54 PM

But at the same time bought such bullshit as an "Arduino Compatible Trimpot"

And doesn't know how to use Ohm's law

maybe the problem is that they are digital... they hear "oh, arduino premade boards are so crap" so they go "ok, then the onlyalternative is to completely do it all myself"

See I think that's too logical and sane to be a candidate explanation

hanlons razor

or a variant thereof

lol

Well it answers one part of the mystery... gives a motive

but... makes the other equally more confusing

Why would he buy premade arduino boards for even simpler things

would you mind pushing that button for me?

3:58 PM

@PlasmaHH I couldn't guess which one you meant :P

@MickLH that emergency stop button for the planet

oooh I think for USA citizens you have to 1. have good connections in military industrial and 2. have unfathomable money to spend on it

ok, sothe next best altearntaive is to vote trump, hm?

Gah that damn reality and its little game of existing

I might have scored a really fun job

I did some work for a lab before, really basic stuff... they were just starting up at the time and I gave them basically all the free consultation they asked for

I basically just helped them get up and running in short, all good and done

Now a while later, they are ready to expand and some of that carefully planted free consultation has grown into project proposals :D

One thing in particular has me pretty excited: Heat powered field data logger

There is actually one case of a machine that should have its temperature monitored, but it's somewhat remote, not often visited by humans, and it's in the dark and the only thing piped to it is hot water.

They do have a tank of liquid gas in the same shed, and a human wheels a new one in every so often... often enough that I could say just change the battery then... but they really inquired specifically about options that draw power without changing batteries and without wiring anything to the shed

4:31 PM

@MickLH "Being waiters"

to be completely honest I think it was more along the lines of "being white"

5:19 PM

Quack

pipe

5:51 PM

Funniest "suggested edit" review in a while: imgur.com/a/gl5qa

6:04 PM

Monday should be a special day to recover from the rigors of the weekend. None of this "work" and "deadlines" and crap...

Also, I would like a way to specify "low-resistivity copper" on my PCB and lower the trace resistances by 50% across the board.

@ThePhoton Your work has deadlines that you actually care about?

@Asmyldof Only as much as I care about remaining employed.

@ThePhoton That's the 4oz button when ordering

@Asmyldof Good point.

Any idea what the cost multiplier is for 2 oz?

@ThePhoton depends on the fab

1 to 2oz is usually no more than 25% on outer layers, no more than 40% on inner layer

My supplier fact sheet: 20x20cm, ENIG, 3.5mil/3.5mil, 4layer:

1oz: $1305

2oz all 4 layers: $1596

Western fabs, however, often pretend it's super hard, in which case it would have probably been a 65% markup

@ThePhoton You could use CircuitHub.com to make estimations of costs using sliders and drop-down boxes once you have a near-complete design and just want to know about copper, etc

6:23 PM

@Asmyldof Unfortunately I'm actually using a CM to build this, and I don't even know what fab they'll use. I could ask but it I won't get an answer until at least tomorrow.

It's meant to be a fairly low-tech design, so I haven't needed to know what fab up to now.

@ThePhoton Bah. Always a bad decision :-P

@Asmyldof The guys we're using are pretty responsive. Just not in my time zone.

Fab: +30%, PostProd Qual at Fab: +10%, CM + 30%, Pre-Deliver-Qual at CM +20%:

2ozCost = 1ozCost * (1.3+0.1)*(1.3+0.2) = 1ozCost * 2.1

@ThePhoton Responsiveness at the levels of mark-up at regular CMs is no surprise to me

Give them 3 projects a year and they can hire a whole communications department just for you

@Asmyldof I guess my boss would rather pay the mark-up than hire another engineer to shuffle POs around.

tbh My allergy to that way of operating also comes a bit from my own preferred methods of doing the design, arranging the contacts and then offering to manage everything with a transparent cost tag, or giving them the info, so they only need to fill in the quantity

6:32 PM

@Asmyldof That's you as a freelancer grabbing that bit of revenue. We're basically hiring this CM to do some of the same stuff your customers are hiring you to do.

@ThePhoton No, that what I do for customers

@Asmyldof But do you get paid for it?

It's me being fed up with 5000000% mark-ups and hush hush ness

For the hours I put in, yes. Anything else, no

Transparent price tag

If you want every component specified, fine, just add some costs to my admin fee listed under "writing full specification"

I will hand you the receipts if you want

Most CMs do that, you'd suddenly get impossible hours, or $500/hr rates to get the same quotes

7:27 PM

I try to concern myself with the more important viewpoints.

Can I just say one more time that writing it as "AR.SE" makes me giggle. This is important to consider. — Asmyldof 1 min ago

who dropped my variac during the move... :/

@PlasmaHH Juergen

@Asmyldof buried him in the woods years ago already

@PlasmaHH Karl-Heinz then?

@Asmyldof are you going through a "popular german names in the 30s" list? ^^

7:36 PM

@PlasmaHH Best ask Kristoff

1920s?

That's only something Klaus could verify

Though he often defers to Hildegard's judgement

I will just patiently wait until the paper that list is written on dissolves into dust, can't take that long

Germans had so many uncalled for names over the years...

It's long

Just ask Ute

our faculty deans name was actually ute...

7:46 PM

Ute ahte, mashi mohaiji?

w'ah?

Yup

Does any know of a current probe that hooks up to a scope that can capture mA current spikes that is less than $100?

shish-kabobblehead

@Craigfoo all my current spikes are less than $100

7:51 PM

A home-made one

a 10 Ohm resistor...

That's not a very good probe

I was thinking a current sense resistor might do the trick.

Quite a lot of self-leakage

For the number of windings

I cant find "very good" in the list of requirements

7:52 PM

Fair point

so in the list of possible solutions, there is still the ubiquitious coat hanger wire

I also can't see any specifications of the "Oscilloscope", so it may have to be a 100 Ohm resistor or could be a 1 Ohm

High range Keysight might be able to work with that

then better dont look how underspecified "spike" is, or the resistor wont work at all

Do the digital clamp-on current probes capture fast spikes?

digital?

7:54 PM

fast?

amazon.com/CM100-Amps-Current-Clamp-Meter/dp/B001TCWL1E

NO

What is GTG?

no clue

EX-ACTLY!

GTC = cheap probe

7:54 PM

EXACTLY

Do you have a current probe?

yep

A? no. A drawer full... yes

which one do you use and trust?

use for what...

7:56 PM

All of them, why else would I have them?

to impress the girls?

1mA - 1A current measurements

clamp-on that can hook to a Tektronix scope.

@PlasmaHH Hasn't worked to date

You buy a Tektronix and worry about buying a well built, calibrated $800 probe? Means your Tek is too cheap to justify buying a Tek

analogue tek maybe? 80s vintage?

Then why not get a needle meter

7:59 PM

it was one that my previous job was going to throw out.

still works

$5 on ebay, faster read out than anything with a display

that makes it clear, after all there are only two kinds of tek scopes

link?

You think I'm going to scour eBay for you?

They're there. There's a search box

You said $5 so I assume you've had experience

8:00 PM

Because they're cheap

yeah, I looked around on ebay but sometimes it's helpful to talk to people who can recommend something.

If you find someone who can recommend something "fast" for "good price" that can measure "a spike", I could use them as my personal psychic

Guess you're not the guy.

I'm thinking it's more a problem of flow of information

Soooo what probe are you using for accurate (+/- 1mA) mA measurements?

8:11 PM

a measurement in mA that's off by +/-1mA isn't accurate, that's 1000 count at best, that's deplorable, I have nothing that horrible

sooooooooo what do you have?

@Craigfoo Somewhere around here I have one rated for 1 GHz, but it doesn't meet your price target.

@ThePhoton, what price range does it fall in?

@Craigfoo $1k - $2k, IIRC.

I think my budget is going to be off then. Do you use it for mA measurements?

8:23 PM

Comparable to http://www.keysight.com/en/pd-2029380-pn-N2782B/50-mhz-30-arms-ac-dc-current-probe?nid=-32553.988319&cc=NL&lc=dut

http://en-us.fluke.com/products/clamp-meters/fluke-376-fc-true-rms-acdc-clamp-meter-with-iflex.html#features

Comparable to http://www.tti-test.com/go/iprober/

http://www.fluke.com/fluke/r0en/digital-multimeters/advanced-multimeters/fluke-289.htm?pid=56061 with acc kits

http://www.keysight.com/en/pd-2519397-pn-34465A/digital-multimeter-6-digit-performance-truevolt-dmm?nid=-536902435.1119130&cc=NL&lc=dut with acc kit

And you'll need all of them unless you think of what, actually, you need, expressed in numbers and percentages

ok, thanks for the recommends.

hm, dang, found an old analogue camera in one of the boxes, unfortunately its among the most sold ones ever and doesnt sell for much :/

@PlasmaHH Did you instead take a picture of your cat's genitals?

@Asmyldof the last cat died a few weeks ago, I would have to get a shovel to do that

8:38 PM

@PlasmaHH Not sure if that makes it funnier or just psychotic behaviour. I'll deliberate

HEY!

Eh

n/m

8:59 PM

@PlasmaHH I thought the crappiest film cameras are nowadays the most popular. Lomography and Holgagraphy and all that...I guess it still doesn't mean you'll get more than $10 for your old Kodak Brownie

@ThePhoton some of the good old rare models sell for really much... and then there are the models that are equal in quality, but were so abundant, that people used them for insulation between walls...

9:29 PM

@PlasmaHH Quite a large wire-loom to keep all the electric-drive motors powered

10:28 PM

@PlasmaHH this is one? youtube.com/watch?v=Q8chs2ncYIw