ChanServ changed the topic of #cubieboard to: is BUY NOW! - http://cubieboard.org - http://linux-sunxi.org/Cubieboard - logs: http://irclog.whitequark.org/cubieboard http://ibot.rikers.org/%23cubieboard/ - development wiki for chips cubieboards run on http://linux-sunxi.org/
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<plssecurity> good evening
<plssecurity> need a little help with cubietruck... first timer here
<plssecurity> ?
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<m6lpi> Hey guys... I have a ct. it's shoved its head up it's OTG port and all I get when it powers up is a blue led that flashes in groups of two... Any ideas ?
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<buZz> not enough power
<m6lpi> hmm... been running off the same psu for ages...
<m6lpi> i guess it could be failing?
<buZz> well, measure it? :)
<m6lpi> it's about 5cm long and...
<buZz> ;)
<m6lpi> i'll got dig out the multimeter
<m6lpi> biab
<buZz> hmm isnt the blue led the network activity though?
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<buZz> > The blue LED indicate the network status. if this LED starts to blink every 1 second, it means the system did NOT connected to a network, after the system has connected to network successfully, this LED will turn OFF.
<buZz> if you're running cubian
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<m6lpi> buZz: this is happening before boot i think
<buZz> have you checked the serial port
<buZz> it would be #1 thing to check when having issues booting
<m6lpi> serial port?
<buZz> yes
<m6lpi> OTG port ?
<buZz> no
<m6lpi> ok, where/how ?
<m6lpi> where's best to get the cable ?
<buZz> i got one with every cubieboard i bought :P
<buZz> from the same seller
<buZz> but i also had them before
<buZz> and bought them since some more, i use them a lot
<m6lpi> I am sure I have one someplace, but couldn't be sure of putting my hands on it right away
<buZz> a well organised workspace is an efficient one
<m6lpi> let me go hunt in the shed
<m6lpi> buZz: I agree.. but S/O doesn't facilitate
<buZz> you cant depend your happiness on the cooperation of others :)
<m6lpi> biab...
<buZz> FYI, if you have old nokia/siemens 'usb datacables' , they can often be hacked into usb-ttl cables
<whitesn> hmm which part are actually connected to the USB interface from the TX/RX? The data?
<buZz> none
<buZz> only gnd directly, really
<buZz> the tx and rx go to a chip in the cable
<buZz> other side of the chip is usb
<m6lpi> cant fint it
<m6lpi> might be in storage
<m6lpi> that do it ?
<whitesn> wait USB only has 4 wires inside right
<whitesn> vcc gnd and 2 for data?
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<buZz> whitesn: usb ttl is a -device- , not a cable
<whitesn> buZz: yeah, I have one and used it myself, but was curious it basically connects usb to the RX / TX right
<buZz> it doesnt
<buZz> 16:55:30 < buZz> the tx and rx go to a chip in the cable
<buZz> 16:55:36 < buZz> other side of the chip is usb
<whitesn> so the wire inside is not the same as usual USB cable used for charging
<whitesn> ?
<buZz> its not a wire
<buZz> its a chip
<buZz> m6lpi: bit confusing they talk about rs232, cubieboards (and generally arm boards) are -not- compatible with rs232 level
<buZz> > Flexible signal level requirement on the RS232-like serial port side also allows PL2303TA to connect directly to any 3.3V~1.8V range devices.
<buZz> well thats what you need
<buZz> m6lpi: should be good, yes
<m6lpi> groovy, i'll get one ordered
<whitesn> buZz: mm when I cut a USB cable I can see there are 4 wires which I assume 2 off them are for charging (+ and -) and the other are for data
<whitesn> so they have different things inside right?
<buZz> look, its not a wire
<buZz> its a device
<buZz> it LOOKS like a cable
<buZz> but there is actually electronics inside to convert the rx/tx serial port to a USB device
<whitesn> ah, so the part inside the USB header is it
<buZz> yes its not very big
<whitesn> so regular charging cable cannot be modified to be used for serial comm.
<buZz> correct
<buZz> unless you add electronics to it
<whitesn> can you tell me which are usually used for cubie http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm
<buZz> the 1.8V ones
<buZz> the FTDI cables are hella expensive btw
<buZz> over 20-30x what m6lpi just picked out for the exact same purpose
<whitesn> o.o I just want to see more detail on it
<whitesn> what should I type on google for the regular TTL cable datasheet
<whitesn> I usually also bought one for 1~2bucks
<buZz> what kinda datasheet?
<whitesn> regular ones? Like what part is used inside the USB TTL cable
<buZz> differs
<buZz> FT232 is common , but expensive
<buZz> PL2303 is popular and cheap
<buZz> also CH430 is cheap
<buZz> next to the chip are some supporting passives
<buZz> not that exciting stuff really
<whitesn> how do I identify mine? I just recently started learning EE stuff, so figured I'll try figure out things around :)
<buZz> plug into USB port, type 'lsusb' on a terminal
<whitesn> it said STC ISP 1032, not sure if that hints anything
<buZz> assuming you're part of linux masterrace
<whitesn> oh I'm on windowsd
<buZz> oh thats sad
<buZz> you can plug it in, and check devicemanager i think
<whitesn> if I remember correctly it said CH340 instead of CH430
<buZz> oh thats possible
<buZz> i fuck up aswell
<buZz> :P
<buZz> yes, ch340 is correct
<whitesn> haha, so every of these models use different IC for the same function?
<buZz> there are many different ICs that provide these functions, yes
<buZz> its a very common task
<buZz> there are also many different cars made, yet they all provide the same function ;)
<whitesn> I see, but in car comparison they have significant different in appeal factor, but I assume if they are doing the same things on same speed or other factor why can one IC be way more expensive
<whitesn> difference*
<buZz> these chips have different functions aswell
<buZz> read the datasheets, compare ;)
<buZz> like FT232 chip has a lot of extra pins you can use for 'functions' like blinking leds or doing weird 'serial alike' stuff
<buZz> yes
<buZz> just because 2 different chips can provide a similar function, doesnt make them 100% the same
<buZz> just like cars
<buZz> one has electric windows, other has manual
<buZz> etc
<whitesn> ah I see :)
<buZz> also physical size is different
<whitesn> for the whole thing or only the IC?
<buZz> ? yes the whole chip
<buZz> what is 'the thing' ?
<whitesn> the one packaged into USB or just the IC
<buZz> the chip packaged inside the USB cable is still a chip
<whitesn> oh I thought you were talking about the chip when you mentioned size
<buZz> it doesnt grow or shrink because its used in a cable
<buZz> yes i was talking about the chip
<whitesn> alright..
<buZz> here is another cable opened up
<buZz> notice how the insides are different , chips are different sizes, locations, different number of parts
<buZz> yet those two devices serve the same purpose
<buZz> there is always more than 1 way to do something
<whitesn> but the capabilities of the chip to do other function is now unusable because it's packaged with the usb?
<buZz> possible, depends on how they designed the board
<buZz> most often the 'fancy' features arent used, and only the serial interface gets used
<whitesn> that.. somehow feels kind of weird
<buZz> why
<buZz> just because your car can go 20 degree uphill, doesnt mean you have to, or ever will
<buZz> and if you never will, it makes sense for cardesigner to not allow that feature to be used
<buZz> consumer hardware most often is capable of more than gets exposed to a consumer
<buZz> like, microwaves could be turned into weapons, its not something the consumer hardware allows by default though
<whitesn> it's as if putting 16GB RAM on 32 bit operating system
<whitesn> or maybe that's wrong way of representing it
<buZz> which is totally possible
<buZz> provided you run linux
<whitesn> or buying a 2000$ machine installing Windows 98' on it
<buZz> many consumer devices also have programmable chips inside to run logic
<buZz> yet they dont allow consumers to program them by default
<buZz> so its like putting a full PC inside your coffeemaker, yet, letting you never touch the keyboard or mouse
<whitesn> I thought usually on EE they have 1 kind of IC broadly accepted to be used for things
<buZz> lol
<buZz> you're new to EE i bet :P
<whitesn> yep really new
<whitesn> like weeks
<buZz> there is this thing called capitalism
<buZz> which guarantees there are always multiple compagnies that want to do a job for you
<buZz> thus they all make similar chips
<buZz> also innovation is low
<buZz> its just the world we live in
<buZz> if we were a worldwide communism , there would be a single chip from a single vendor
<whitesn> so in a way on this scenario (USB TTL cable), the more expensive one has 0 upside compared to the cheaper one
<buZz> i wouldnt recommend getting a ftdi cable , no, unless you just wanna spend more
<whitesn> no I'm not getting one..
<buZz> also, FTDI has proven itself to be very malicious in their capitalistic intent; https://www.sparkfun.com/news/1629
<whitesn> I mean, I saw there are bunch of things done by regularly accepted IC: MAX7209 on dotmatrix, L293D for driving motors
<whitesn> so I thought if they are totally using different ICs there should be something different?..
<buZz> 7219*
<buZz> there are differences
<buZz> just not in application
<buZz> there are also multiple vendors making LEDs
<buZz> they have differences
<buZz> but all give light
<whitesn> what differences are those from LEDs?
<buZz> power usage, light frequencies, current drain, forward voltage
<whitesn> hmm but that's not really comparable to different IC
<buZz> btw, MAX7219 has a 100% compatible chip available ; AS1106
<buZz> from a different vendor
<buZz> its 100% compatible, but also adds some features
<buZz> and its cheaper by about 60%
<whitesn> by compatible means it does all the thing MAX7219 does as well?
<buZz> yes
<buZz> and all pins are in the same place
<buZz> with the same function
<whitesn> interesting..
<buZz> its not that uncommon
<buZz> like, intel used to be the only company making x86 processors
<buZz> then AMD, Cyrix, IBM all started doing it aswell
<buZz> the chips they made worked on the same motherboards as intel motherboards initially
<buZz> straight drop-in replacements, often faster than the intel chip it replaced
<whitesn> I just thought for really specific function there usually really few accepted standards
<buZz> as i said, that holds true in communistic communities, EE isnt one
<whitesn> like USB cables, SATA cables, SD cards
<buZz> its pure capitalism
<buZz> all those things are made by -many- different companies
<m6lpi> right, two ordered
<whitesn> m6lpi: which shipping method did you take?
* buZz guesses 'the cheapest one'
<buZz> :P
<whitesn> cheapest one took like 1 month?
<whitesn> "free one"
<buZz> its what we accept to have cheap hardware from china
<buZz> 3 weeks usually
<whitesn> I live here and I feel living in heaven
<whitesn> :P
<buZz> where is here
<whitesn> china
<whitesn> heheh
<buZz> near shenzen?
<whitesn> no but still logistics are considerably cheap
<m6lpi> free one, as dhl was like $97
<whitesn> m6lpi: I think it's better off to buy one on your local online shop? Not like it's really pricey especially for one time payment
<whitesn> the free one took like a month
<buZz> lol
<buZz> whitesn: FYI, a 2 usd chinese item , is 10 usd in a european/us store
<buZz> if not more :)
<whitesn> yeah but still... it's one month
<m6lpi> whitesn: i cant find one 'locally'
<buZz> what nation do you live in m6lpi ?
<m6lpi> uk
<whitesn> wat..
<buZz> look at that price :D lol
<whitesn> heheh
<m6lpi> yep
<buZz> ah this is better
<whitesn> I know I can get Unos here for more or less 3 bucks
<whitesn> that is probably 10x on the original store
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<buZz> i know i can get weed here (in .nl) cheaper than in uk
<buZz> its just often, local prices dont really translate internationally
<whitesn> aren't there any manufacturers in EU or just the labor workers are way more pricey than CN?
<buZz> whitesn: for chips? no , most EU/US chip 'manufacturers' are actually fabless, and have the actually chip produced in china
<whitesn> I think in CN the labor workers vary from 200~400 USD / per month
<buZz> yeah, easy 10-20x here
<whitesn> for labor workers?
<buZz> yes
<whitesn> owell considering living cost
<buZz> this also increases the costs of any local production
<buZz> i cant buy a house locally for less than ~150000 euros
<buZz> yet, same money in china probably buys me nice big mansion with big piece of land
<whitesn> not really actually
<whitesn> that depends on location
<buZz> yeah , not in shanghai :)
<whitesn> but probably not even near what you are thinking
<whitesn> in Indonesia probably
<buZz> but that 150000 is for a town with 30000 people
* whitesn is from Indonesia :)
<buZz> welp i gotta go do stuff
<buZz> ship some bitcoin miners ^_^
<buZz> bbl
<whitesn> haha sure catch ya later, thanks for the conv. really helpful :D
<buZz> feel free to drop any questions here later
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