NIOS-II and USB

See, that's a good question. I have no idea what you are talking about.

I naively assumed that since the USB controller is on the same board, and since the project is called usb_32 that I could play with the USB controller as easily as I play with the LEDs and Switches.

Looking at some of the code in the installation of the microtronix board on my PC, I see that there's a "driver" in there. It uses the command "outb (..)" quite a bit. I don't know if the driver works, or what it does, it is as poorly documented as the rest.

Sorry forgot it wasn't you're board but off the shelf.

I'd start by searching for that chip to see how it works. Then the next step is to find the signals going to it from the controller IC to the FPGA. Once you know how the controller works then you probably won't need an example.

If they give you drivers (NIOS II I assume), then make sure you have the correct system downloaded to your board. Again, if you can figure out how to use the controller and how it's connected to the FPGA you can develope your own method to talk to it.

Thanks, I was hoping that someone had some experience with the Microtronix Cyclone Dev-board.

The thing I was looking for is something similar to this:

void main (void)

{

// config USB controller

// set up interrupt control

IOWR_ALTERA_AVALON_PIO_DATA(USB_BASE, USB_INTERRUPT_CONTROL_REG)

IOWR_ALTERA_AVALON_PIO_DATA(USB_BASE + 4, ENABLE_SEND | ENABLE_RECV )

etc.

}

What type of transfers are you doing, byte or burst?

Basically those lines are just cache bypass writes to the parallel interface. Do you have more that you can show (none of that is really USB specific, that's just IO to the parallel interface).

Hello,

The missing example source code for the USB device was a mistake on our part while the Cyclone Development Kit for Nios II was being put together. The next release of the Kit will contain the example source code.

In the meantime, a Nios II IDE example software project that makes use of the USB device has been made available in the downloads area.

nios ii microtronix cyclone development board usb test project (http://www.niosforum.com/downloads/examples/mtx_cyc_board_usb_test.zip)

installation

Unzip the file to

.../altera/kits/nios2/examples/software

usage

1. Create a new Altera Nios II C/C++ Application

2. Select the ptf file from the usb_32 project for the Microtronix Cyclone Development Board example designs.

3. Select USB Example at your project template.

4. Build the project.

5. Ensure that the usb_32 core is running on the Microtronix Cyclone Development Board

6. Plug in a USB device (such as a mouse) into the board (J2)

7. Run the project.

The example code will display information from the device descriptor for the USB peripheral when run.

I hope it helps, Please feel free to contact us for assistance if necessary.

Ken, thank you for your mail!

BadOmen, I am hoping to do interrupt transfer, but before I can even start to think about that, I want to know how I communicate with the controller ( then, later, we get to device descriptors etc. but that kind of thing is well-documented elsewhere)

I looked at the old code, and I am now making headway. I&#39;ll post a small example later on http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/wink.gif

Thank you for your time!

OK, so now we got a bit further. I am now able to communicate with the controller.

When searching for info about the SL811HST chip, it seems that everyone is focusing on its Host capabilities. However, reading through the code supplied for NIOS (the old kit) it seems the "driver" is a modification of SL811S chip driver for Linux ( the files are also called SL811S.h/.c ). I am just guessing here, but perhaps, when in slave mode, the SL811HS works just like a SL811S?

From the Microtronix Docs, i can see that I need to move some jumpers around to go into slave mode. I set up the jumpers for slave mode, and hooked up a USB packet analyzer. It works like a charm with my MP3 player, now when I plug in the Dev Board nothing happens. I had the impression that the Device detection mechanism in USB, is some pulldown resistors - so when the Host ( PC ) detects the cable is being plugged in, I would assume that a SETUP token would be sent... BUT.. NOTHING!! NOTHING is sent.. EVER.. when the DevBoard is being plugged in and out.

One thing I thought was weird though, when I plug in the USB w/o power on the Dev Board, two leds light up. It seems that the Board is wired to be powered over USB or something like that.

Hello,

One thing you can try is removing one of jumpers J5 and J6, then connect the board. If that doesn&#39;t work, try the other one. Let me know if either configuration works.

You are correct in guessing that the slave mode works like a SL811S. We had a developer get slave mode to work at one point under MicroC/OS-II. I&#39;ll see if we can get that code to you as well.

One side-effect of the way the board is wired up is that some of the USB power makes its way to other areas of the board when connected to a USB host. Don&#39;t count on it to power the whole board reliably though.

Dennis Scott

Microtronix Datacom Ltd.

Tadaaa...

Perhaps there&#39;s a typo somewhere, or perhaps I didn&#39;t read carefully enough

Slave Mode both speeds:

J3 = Open

J4 = Open

Full Speed:

J5 = Open

J6 = Closed

Low Speed

J5 = Closed

J6 = Open

I deduce the Fullspeed/Lowspeed by the presense of Low Speed Keep Alive Packets in the Stream.

Now all I need to figure out is how to get the USB interrupts. I do this:

alt_irq_enable_all(USB_IRQ);

alt_irq_register (USB_IRQ, NULL, handle_USB_interrupts);

Is that all I need, or... http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/wink.gif

best Regards

Morten