EmbDev.net

Forum: FPGA, VHDL & Verilog USB/uart configuration header


Author: eman (Guest)
Posted on:

Rate this post
0 useful
not useful
Hi,

I was trying to figure out MIDI communication via UART, for an unpowered 
device. And have a development kit with an USB PHI. But was wondering as 
far as I can tell I only need to know the speed of the data transfer 
(and maybe a name) for being able to not have a PHI all together. And I 
think it would be easyer to catch the init value, rather than to build a 
frequency counter.

Does anyone know about the info that is sent to the device to set the 
init settings, I can't really find it?

Author: Lothar Miller (lkmiller) (Moderator)
Posted on:

Rate this post
0 useful
not useful
First: up to now I cannot figure out any relation of this exercise to 
FPGAs...

eman wrote:
> And have a development kit
Lets try it that way: WHICH one?

> with an USB PHI.
WHICH one?

> But was wondering as far as I can tell I only need to know the speed of
> the data transfer (and maybe a name) for being able to not have a PHI
> all together.
I cannot get any sense out of this sentence. Can you try to write in a 
different way WHAT you want do get?

Author: eman (Guest)
Posted on:

Rate this post
0 useful
not useful
Thanks for looking into this,

It's an altera DE-1 SoC board, and there is a HUB "USB251xb" and a PHY 
"USB3300-EZK".

In my build there will be a 3rd party USB to PATA/IDE controller too.. 
But that aside.

I was thinking, since the PHY won't give me the frequency of the data 
transfer. And the device is unpowered.

Is'nt there a way to make a smaller optoisolator circuit and listen to 
what the host frquency tells my device. without using a PHY? If it does 
supply a speed setting to begin with?

Or if there are is a table somewhere describing the initial setup 
procedure in binary?

Author: eman (Guest)
Posted on:

Rate this post
0 useful
not useful
Cant edit my post..

But, does the host tell the device at what frequency the transfer is 
going to be? Before hand..

Author: eman (Guest)
Posted on:

Rate this post
0 useful
not useful
Please don't snuff me out on the UART :(
I got so much programming goodness to give.. Help me get on a bit with 
this.

Author: eman (Guest)
Posted on:

Rate this post
0 useful
not useful

Reply

Entering an e-mail address is optional. If you want to receive reply notifications by e-mail, please log in.

Rules — please read before posting

  • Post long source code as attachment, not in the text
  • Posting advertisements is forbidden.

Formatting options

  • [c]C code[/c]
  • [avrasm]AVR assembler code[/avrasm]
  • [vhdl]VHDL code[/vhdl]
  • [code]code in other languages, ASCII drawings[/code]
  • [math]formula (LaTeX syntax)[/math]




Bild automatisch verkleinern, falls nötig
Note: the original post is older than 6 months. Please don't ask any new questions in this thread, but start a new one.