Hello,
I am currently attempting to use a COM port device through this USB hub the TUSB2036. Is there any resources available for making this work. Right now, the device is only being recognized under USB with a USB port and hub number. I tried another commercial USB hub i had and it recognized the device under the COM port section which is what I needed.
-Sal Garcia
Hello Sal,
I am not sure I understand, are you saying that you want to interface a USB port with a COM port (UART) ?
If so, there is a dedicated device for this, the TUSB3410
Regards.
ELIAS VILLEGAS Hello Sal, I am not sure I understand, are you saying that you want to interface a USB port with a COM port (UART) ? If so, there is a dedicated device for this, the TUSB3410 Regards.
It is a device that connects via a UCB cable but it shows up on a windows computer as a COM port in Device manager. We were looking for a software solution because the TUSB2036 has to be used for this design since the PCB were already printed and everything was designed around it.
What is your COM device? OS ?
It's called the HI-pro USB hearing aid programmer.
http://www.otometrics.com/fittingsystems/Fitting/Hi-Pro_USB.aspx
This is the USB version, whereas the previous version just used a RS232C port. It may even have a RS232 to USB adapter inside so that it could work on a USB port but still pops up as a COM port.
Any updates?
I don't think some modifications to the hub will make a change, with the TI's USB-to-Serial converter (TUSB3410) we've seen this behavior with some drivers.
Have you asked to the RS-232 device's manufacturer? The TUSB2036 is not High-speed capable, does the device's driver works with only Full-speed?
The device is the Hi-pro hearing aid programmer. From their site:
Built-in USB 2.0 connection (USB 1.1 compatible)
So i dont believe it is an issue with USB Full speed or high speed compatibility. Please let me know
-Sal
Are you able to get a USB bus trace captures?
Can you send your schematics?
I can't get a bus trace right now but here are the schematics. I am connecting the downstream device to JP2.
Connect a pull-up to 3.3V on each /OC input.
Your downstream device should have an integrated pull-up on D+ or D-, you don't need the R8U.
Is JP2 a USB type A connector?
I actually already added those pull ups on the OC inputs but this schematic does not show that.
The JP2 is just a jumper connector from my PCB to the device's D+, D-, Vbus, and GND inputs directly.
The device did have a USB A connector previously but I desoldered it and hardwired it for a more permanently attached device.
Any thoughts?
Could you send us your system fro debug?
You can send me an email to elias.villegas@ti.com to get the contact information.