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?
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?
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?
Cant edit my post.. But, does the host tell the device at what frequency the transfer is going to be? Before hand..
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.
Yea.. Thanks for nothing. https://msdn.microsoft.com/en-us/library/windows/hardware/ff539242%28v=vs.85%29.aspx