Re: [usb] dout of usb 1.1 function core

[mdennis97@hotmail.com]

Thanks,rudi.You are right.I made a mistake for these wires.

I have another question:why some signals of the PL module were not 
handled?
ie.,token_valid,int_to_set,int_seqerr_set,pid_cs_err,nse_err,crc5_err,rx_s
ize,rx_done,etc..

Regards

Dennis

----- Original Message ----- 
From: Rudolf Usselmann <rudi@a... > 
To: usb@o...  
Date: 04 Dec 2002 22:20:03 +0700 
Subject: Re: [usb] dout of usb 1.1 function core 

> 
> 
> 
> Dennis, 
> 
> please understand that I can not clarify each of the 50 emails I 
> get every day. 
> 
> Honestly I don't understand what the point of confusion is, but 
> let me assure you that this core has been implemented in a product 
> that is shipping and works just fine ! 
> 
> Try to read through the code and run a few simulations, look at 
> the waveforms at different levels, may be that will help to 
> understand what is going on. 
> 
> Good Luck ! 
> 
> rudi 
> ------------------------------------------------ 
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> 
> On Wed, 2002-12-04 at 21:28, M Dennis wrote: 
> > hi,rudi 
> > 
> > I am a little confused with your USB 1.1 Function IP Core.In 
> usb1_core.v, 
> > 
> > // In endpoints only 
> > always @(posedge clk_i) 
> > 	case(ep_sel)	// synopsys full_case parallel_case 
> > 	   4'h0:	tx_data_st <= #1 ep0_dout; 
> > 	   4'h1:	tx_data_st <= #1 ep1_din;   // why not ep1_dout? 
> > 	   4'h2:	tx_data_st <= #1 ep2_din; 
> > 	   4'h3:	tx_data_st <= #1 ep3_din; 
> > 	   4'h4:	tx_data_st <= #1 ep4_din; 
> > 	   4'h5:	tx_data_st <= #1 ep5_din; 
> > 	   4'h6:	tx_data_st <= #1 ep6_din; 
> > 	   4'h7:	tx_data_st <= #1 ep7_din; 
> > 	endcase 
> > 
> > epn_din is input wire,which should not connected to assigned 
> to an output 
> > port,isn't it?I think the data stream will flow from epn_dout 
> to PL module 
> > via tx_data_st. 
> > 
> > Similar dout to the following code in the same file. 
> > 
> > assign ep1_dout = rx_data_st; 
> > assign ep2_dout = rx_data_st; 
> > assign ep3_dout = rx_data_st; 
> > assign ep4_dout = rx_data_st; 
> > assign ep5_dout = rx_data_st; 
> > assign ep6_dout = rx_data_st; 
> > assign ep7_dout = rx_data_st; 
> > 
> > 
> > Please clarify them. 
> > 
> > Reagards 
> > 
> > Dennis 
> > 
> > 
> 
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