from http://forum.xda-developers.com/showthread.php?t=1081743,
did anyone has try the UART? I've made a uart line from the guide, plug the connector, but there is nothing output on minicom. I'm sure the the the pl2303 and line connection is right. is there need some more software setting? thanks
Related
Has anyone figured out if its possible to use the ExtUSB (sync) port as a USB host port? I'm guessing the communication lines could be controlled with software, but that you would have to use an externally powered USB hub (or devices that are externally powered) unless the +/- charge lines are 2-way.
techntrek said:
Has anyone figured out if its possible to use the ExtUSB (sync) port as a USB host port? I'm guessing the communication lines could be controlled with software, but that you would have to use an externally powered USB hub (or devices that are externally powered) unless the +/- charge lines are 2-way.
Click to expand...
Click to collapse
I don'ty know the answer, but... what for? The X7500 has the cable to allow USB devices connect to the USB host... so? And for sure you will need a cable to convert mini USB to female regular USB... so is not a matter of money or carring a cable I guess.
Mostly techie curiosity. I figured since someone already figured out how to reroute internet sharing to make a wifi host, someone else must have looked at that normal-looking usb port and thought about making it work like a usb host. I'm a programmer but I don't have time to work on that...
techntrek said:
Mostly techie curiosity. I figured since someone already figured out how to reroute internet sharing to make a wifi host, someone else must have looked at that normal-looking usb port and thought about making it work like a usb host. I'm a programmer but I don't have time to work on that...
Click to expand...
Click to collapse
unfortunatly the chip that does that feature is not capable of that.
if you look at the schematics of a root hub it has 1 main chip that is the hub controller, and slave chips for each of the ports. a device interface has a diffrent type of chip that's intended to be connected to a root hub connection port. thusly no software fix could be made too convert a port intended to be a connection point into a root hub port
mind you the 4-in 1 cabloe is cheap enough and i saw at least 1 site via google that had a usb port only cable for the sepcial connector
so is worth looking at that.
Hey - do you have the details of the company selling this 'usb only' cable?
Thanks for the input. Just curious if it could be done, I hadn't tried to look up the schematics. I second the request for the info on the usb-only cable, that would be perfect since they already gave us a vga cable...
Would this "USB cable" allow me to use a 149GB externally HDD caddy like I managed on my Dell x51v Axim's CF to USB slot, as the 4 in 1 cable isn't cutting it?
Thankz
There are lots of posts related to external HD and X7500... in general most of them (99'99%) don't work properly. In the webpages from HTC said that the 4-in-1 cable only admit mouse, keyboard and pen-drives.
Stupid question for anyone who might know. If I use the webtop over HDMI hack, and I use the USB OTG hack being discussed in the overclock thread (use a micro B to USB A adapter and a powered hub) would it charge the phone or not? I assume no but if not then I assume Motorola did something in their docks to allow this. Would it be possible to do this with a USB hub? I could open it and solder wires etc I just don't have an atrix yet to try it.
hum....looks like if I have pin 5 at 36.5 kOhms it will allow charging and host mode, but I may have to open the adapter, put the resistor, close adapter, open hub, solder the + and - wires from one of the slave ports to the master port to provide the 5v. Does that make sense to anyone? I am not an expert on USB (I am a solder tech and avionics tech though) but it sounds like it may work electrically.
Never mind I found my answer here:
http://forum.xda-developers.com/showthread.php?t=997187
I would like to connect my Prime to a serial port in order to use a terminal connection interface with some equipment. I am currently using my laptop to conduct some maintenance on this equipment out in the field and would love if I could shed this weight and use my prime instead.
I have the following apps:
- ConnectBot
- Slick USB 2 Serial Terminal
However, the USB to Serial cable which is use for my laptop recevies power from the USB port in order to work. It does not appear that the Prime provides power to its special connector to USB cable (data cable). I do not have my keyboard dock yet, so I do not know if the full-scale USB port provided on the dock will allow me to use my existing cable.
So, my question to ya'll is:
Can I use just the Prime (without the dock) to connect to a serial connection? If so, how best can I accomplish this?
Anyone?....
I have connected an OTG cable to my device, I also have a powered USB hub connected to the other end of the OTG cable, When I try using a male to male USB cable to go from the USB hub to my computer my phone does not talk to the computer. Can I by making a special cable, have my phone talking to the computer and OTG?
I hope I explained this well enough
Thanks hope this helps you help Clancey Aggen
UAS specialist said:
I have connected an OTG cable to my device, I also have a powered USB hub connected to the other end of the OTG cable, When I try using a male to male USB cable to go from the USB hub to my computer my phone does not talk to the computer. Can I by making a special cable, have my phone talking to the computer and OTG?
I hope I explained this well enough
Thanks hope this helps you help Clancey Aggen
Click to expand...
Click to collapse
USB works via a type of slave/host setup. A typical scenario would involve plugging your device into a PC for file-transfer, in which case the PC is acting as 'HOST', and the device is acting as 'SLAVE'.
However, If your phone is operating in USB OTG mode then it is operating in host mode and therefore your PC would be unable to connect, as you have two devices hosting connections, but neither is seeking connection. Overcoming this limitation although plausible, is practically speaking, a waste of time in presence of other solutions.
The cable ends determine which mode to put it's respective device in. The Male MicroUSB-B end (the OTG end) has an extra pin that's jumped to another. This signals the "OTG" host mode in the device. "OTG" only applies to the MicroUSB, as the "On-the-go" functionality means it can be either host or slave.
May I ask what you are attempting to accomplish and/or why you need this setup? Just trying to transfer files or more?
Edit: my theory is you expected something akin to two-devices on a network hub. A typical USB hub is slave-device, used to share a bus lane together with other usb slave-devs, e.g. "turn one port into 4". Do not confuse with the similarly-named Network Hub. While it technically is still serial communication, thats on a whole 'nuther level functionality-wise. (Nethubs echo any received messages across all lines. USB does not do this to my knowledge.
Does anyone know if it's possible to access the PX5's OTG USB using one of the existing external USB connections (without having to pull the head unit apart)? I'm trying to get a USB connection for ADB and came across this on the wiki:
Bootloader mode
Holding the power button while turning on the unit will get you into bootloader mode. **This is battery power not acc power** The screen will be black but plugging in a usb to the front usb will prompt the PC to install the RockChip bootloader drivers - this might help http://www.cnx-software.com/2013/11...install-rockchip-usb-drivers-in-windows-xp78/
Click to expand...
Click to collapse
I noticed on the MTCD schematic that the MCU has pins for CTL_RECOVERY and CTL_WAKEUP, which leads me to believe it might be possible to program the PX5 in place using some sort key combination. I tried the wiki instructions, but can't get the PX5 get picked up at all on the USB connection.
It depends on the hardware - Some GS might as the original GS has the hardware configuration and switch correctly implemented, which some GS users have reported. Others manufacturer units might not, ostensibly because they messed up the implementation (e.g. my JY or Joying).
Give it try, put device into recovery mode and connect usb port to PC.
Teh crickets!
Oops, pardon the late response. I've given it a try and the manufacturer even sent a special cable (purple connector instead of the white), but I'm unable to get the PC to detect anything on the USB port. Doesn't even try to enumerate a device on Windows.
If it helps, this is a KLD device.