Usselmann, Rudolf

USB 1.1 Function IP Core

This issue was reported here http://opencores.org/forum,USB,0,4308.

I confirmed the issue and the suguested fix.

It is replicated below;

Possible enumeration bug found
by venny on Jun 4, 2011 		venny
Posts: 2
Joined: Feb 27, 2011
Last seen: Jan 21, 2012
Hello everyone, I'm not sure if anyone posted about this before: In USB 1.1 core from opencores_ws, file usb1_ctrl.v, line 253, shouldn't there be "(rom_size_dd > wLength[15:0])", instead of [6:0]?
When used with NI VISA driver, host asks for 0x400 bytes of configuration descriptor(0x80 0x6 0x0 0x2 0x0 0x0 0x0 0x4). This caused device to return 0 bytes, now it seems to work properly. Was anyone facing the same problem?

Descriptor length issue

In PE the buf_sel and the address are corrupted, if an IN packet is served and the other buffer is updated from the CPU side.

In the IDMA the idma_done signal is handled not correctly.

bugs in PE, IDMA

We are not able to download Generic memories required for functioning USB 1.1 IP from the link given in Overview section. It seems that link of "Generic memories" section is broken.

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USB 1.1 Function IP Core