Bare metal USB device code

as subject, anybody done or aware of code that implement any minimal work usb device mode stack on zynq?

sure its ARM and EHCI so some generic code is available, but I wonder if there is any code that has actually been verified to work on zynq-zedboard?

Antti

0 Former Member over 12 years ago

I am curious about this as well. There is a sample project available in the xilinx SDK documentation which is supposed to act like a USB mass storage device. I have tried it and I can get it to compile and run, but I can't get my host PC to detect anything when I connect it. Also, no interupts fire on my device either.

If it will help you, the example code is installed on your machine here for 14.3 "Xilinx_install_dir/14.3/ISE_DS/EDK/sw/XilinxProcessorIPLib/drivers/usbps_v1_03_a/examples/". Similar examples are available in similar locations for 14.2 and 14.1 as well.
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0 Former Member over 12 years ago in reply to Former Member

This code does work. I got some code from a local Avnet technical marketing guy which helped me get it working for my ZC702 board. The USB PHY needed to be reset before it would work. So this code snippet placed at the beginning of main() did the trick:

    // The following code is required for ZC702 (Rev C tested) to place USB PHY out of reset.
    // this block of code needed is not needed for the ZedBoard (Rev B tested)
    Xil_Out32(0xe000a204, 0x80);
    Xil_Out32(0xe000a208, 0x80);
    Xil_Out32(0xe000a040, 0x80);
    Xil_Out32(0xe000a040, 0x00);
    Xil_Out32(0xe000a040, 0x80);
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0 Former Member over 8 years ago in reply to Former Member

You find the key, and now my project works well. Thanks.
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0 100alfi over 7 years ago

@honglei i am trying to establish a connection between Device and Host side , i am looking for a code can you share me a code for a PC side .

Thank You
Alfred
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0 100alfi over 7 years ago in reply to Former Member

Hello Dangmug .
i am trying to establish a connection between zynq7000 and usb2.0 Phy IC , I Need a source code for windows side for host device .i tried to google but i did not find a right code .your feedback will be greatly appreciated .
Thank you
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