08-03-2020, 06:15 PM | #29 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
The only difference I would be creating is that I would be reducing the amount of power available across each individual port if I were to have all of the ports utilized. I have one 8GB USB stick that I leave connected in the console with music on it and use the second one for my phone. Adding a splitter and utilizing only two ports still would mean they would still work in exactly the same way with no degradation or loss of functionality. The connector on the back side of the USB ports in the console isn't a standard USB-A connector and re-routing that wiring might be more than just a trivial affair to complete. It makes more sense to move closer to a 'source' location and split there with shorter overall runs. |
|
08-03-2020, 06:42 PM | #30 | |
Drives: Camaro ZL1 Join Date: Apr 2019
Location: London, UK
Posts: 304
|
Quote:
Can you see any issues I may come across?
__________________
Made in the USA. Refined in Great Britain - insta: zl1uk
Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving... |
|
08-03-2020, 06:49 PM | #31 | |
Long hauler
|
Quote:
Ignore the discolored as my original module was fried lmao
__________________
2022 2SS 1LE - Window Sticker - Cold Air Inductions Elite Carbon CAI
2016 1LT v6 - Totaled Happiness: Infinite |
|
08-03-2020, 06:54 PM | #32 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
I had actually looked through your photos and couldn't determine one specific piece of data that I'm after - whether the connector containing the mini-usb plug that snaps on to the module has any other wiring that it carries or not. If it is completely by itself, then I agree that splitter would work there. They're a giant PITA to find, though, unless you want to wait a month to have it shipped in from China. As I was contemplating doing exactly what you're describing, I had thought about just inserting a splitter into the source end of that cabling at the HMI end as that would also siginficantly decrease the amount of wiring to run and the risk of the wiring causing issues down the road. In the end, it doesn't matter if it's split at the beginning or at the end - it will work exactly the same. Splitting at the beginning potentially makes it easier and more reliable overall. As an aside - yes there is a space for an SD CARD in my module, but that is "pre-filled" with the map database for the navigation. |
|
08-03-2020, 07:09 PM | #33 | |
Long hauler
|
Quote:
__________________
2022 2SS 1LE - Window Sticker - Cold Air Inductions Elite Carbon CAI
2016 1LT v6 - Totaled Happiness: Infinite |
|
08-03-2020, 07:22 PM | #34 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
I'll probably try and take a look tomorrow. Lifting the console only takes five minutes (remove the knee pads, two bolts on each side up front, push the seats all the way forward, one more bolt on each side behind the covers, pop the rear seat up, and you can lift the console for access to the module). Once I get the module out and the wires unclipped, I'll be able to better tell what I might be dealing with for wiring. UPDATE: It takes less than 20 minutes to remove the knee pads, the six screws, pop the rear seat, lift the console, disconnect the USB wire, and then put it all back together again. And, as I suspected, you do NOT need to unclip the shift boot to do any of this - that's only necessary if you're completely removing the console for some reason. My USB connector is the same - a single mini-USB plug in a very large plug mold that clips into the module. Last edited by ember1205; 08-04-2020 at 08:56 AM. |
|
08-03-2020, 09:23 PM | #35 | |
Drives: 2018 1SS 1LE Join Date: Jul 2020
Location: AZ
Posts: 161
|
Quote:
__________________
2018 1SS 1LE Hyper Blue
|
|
08-04-2020, 08:01 AM | #36 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
Splitters are generally seen as a 1-to-2 device and hubs are a more generic 1-to-more device. Splitters wire the new connectors in parallel and this is how hubs work so that any connector in the chain can communicate back to the USB controller. Any USB controller can theoretically control up to 127 unique devices on the wire, and each device uniquely identifies itself in the communications so that instructions go between the controller and the appropriate device. The shortcoming of USB is -power-. This is where hubs CAN be different in that they can add power to the wire as well as split the data signaling. USB (like what is in our cars) is made up of two, 2-pair connections. On a standard USB-A type connector (like on your computer), the outer two pins carry the +5V power and the inner two pins are for data. In a hub, the power that's fed from the USB controller to operate the connected devices is either not carried through at all (a power adapter for the hub is required in order for devices to work unless they are self-powered) or the power carried over the USB cable is disconnected when a power adapter for the hub is connected. |
|
08-04-2020, 08:45 AM | #37 | |
Drives: 2017 Bright Yellow ZL1 6spd Join Date: May 2010
Location: Central MA
Posts: 646
|
Quote:
Sorry, after listening to some people doing pretty dumb things, I assumed the worst. I assumed that you literally wanted to split the cable, and spice one in. I'm sorry. Unfortunately, I have been asked questions like that before. Sounds like you've got this figured out. The wires going into the HMI will be in a larger GM US Car connector, not a USB connector
__________________
2017 ZL1 Bright Yellow w/ black center stripe, 6 speed, CF gas door, PDR, Navi
|
|
08-04-2020, 08:49 AM | #38 | |
Drives: 2018 1SS 1LE Join Date: Jul 2020
Location: AZ
Posts: 161
|
Quote:
Yes, USB can *address* 127 devices per port, that doesn't mean you can directly connect 127 (or 2) devices to the same data pair. There is a physical layer you have to contend with. USB is a master-slave protocol. Unlike, say, CAN that is a "bus" designed to handle everyone talking at once, there is no data collision detection/ prioritization built in to the USB physical layer. Hubs provide the required isolation between the devices so the data doesn't collide and act as the master to the connected devices, and a slave to the host. Any cable-only splitter you find will most likely be just a power tap. To properly split a USB connection, you need a hub, and the host device needs to understand how to talk to that hub. I suspect the IC on the USB module in the center console is exactly that, a USB hub controller.
__________________
2018 1SS 1LE Hyper Blue
|
|
08-04-2020, 08:54 AM | #39 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
So, it would seem that I'll need to add the splitter at the console end of the wire since that is nothing but a mini-USB connector on a ridiculously oversized plug mold (see pic I took just now). I will see if I can find a mini-USB to mini-USB/USB-A splitter and then just run a USB-A extension from under the console to above the glove box. At the glove box, I may add a two port hub or USB-A splitter so that I could have both my phone and maybe a USB drive with music there instead of in the console. Since my focus is to not use more than two ports at a time, this shouldn't cause any issues for me. Additionally, I have seen where some people have added very small USB hubs in the console without issue as well, so it would seem that the power availability would be ok anyhow. |
|
08-04-2020, 09:03 AM | #40 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
Any integrated circuits in a hub are actually to control signaling so that the data is 'repeated' correctly downstream because of length limitations on the cabling that could limit how long of a run a data signal can traverse w/o faulting. Additionally, these circuits may also be used to regulate power delivery to the various ports as power is supposed to be delivered in 100mA "chunks" up to a max of 500mA (.5A). The hub itself is completely transparent from a data signaling perspective to the controller, and any data signals that come in from the controller are actually mirrored to all ports on the hub (much of why a USB hub is called a "hub" is because it operates in very much the same way as a network hub/repeater as it pertains to data signaling). So, splitting a cable requires nothing special for data signaling but -could- lead to some quirks as it pertains to power if you attempt to over-draw the system. |
|
08-04-2020, 09:28 AM | #41 |
Drives: 2018 1SS 1LE Join Date: Jul 2020
Location: AZ
Posts: 161
|
"transparent" and "physically connected together" are not the same thing.
The controller isolates USB devices from hearing other USB devices as well as arbitrates when devices of different standards are connected and notifies the host of a new device. None of these things would happen if two ports were physically connected. Please see the USB specification. http://sdphca.ucsd.edu/lab_equip_manuals/usb_20.pdf
__________________
2018 1SS 1LE Hyper Blue
|
08-04-2020, 10:04 AM | #42 | |
Hot Camaro
Drives: '20 2SS Convertible 6MT Join Date: May 2020
Location: CT
Posts: 3,541
|
Quote:
|
|
|
|
Post Reply
|
|
|