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Detect HighSpeed instead of SuperSpeed
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RSKV

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Detect HighSpeed instead of SuperSpeed

Nazila posted on 07 Mar 2012 10:15 AM PST
Top Contributor
55 Forum Posts

Hi,

I am using a win7 x64 PC with USB 3.0. It recognize the DVK (REV2) as SuperSpeed when I download the "bulk lopp manual In Out" example. However, it does not recognize my custom design board as SuperSpeed (detected as HighSpeed).

What can be the cause?

Thanks,

Nazila

Re: Detect HighSpeed instead of SuperSpeed

sodafarl posted on 08 Mar 2012 12:32 AM PST
Top Contributor
128 Forum Posts

Hi Nazila,

What are the clock select pins FSLC01,2 configured as and what boot option have you selected (PMODE pins). Can you try a shorter USB 3 cable in case its related to layout etc.

Sodafarl

USBbulkSourceSink this example , how to modify the program , allows transfer speeds of 300MB / s

guoren lee posted on 16 Jul 2012 06:34 PM PST
Member
6 Forum Posts
In the this example USBbulkSourceSink , I modified the max.no of packets in a the Burst = 2 , then into dmaBukSrcsinkconfig.size = 3072; endPointconfig.burstlen = 3. Program can be lost , but the stream measurement speed when number You can not measure speed, etc. ? How to solve?

Re: Detect HighSpeed instead of SuperSpeed

RSKV posted on 16 Jul 2012 08:41 PM PST
Cypress Employee
655 Forum Posts

Hi,

Do the following things to see the throughput numbers of around 300MBps.

1. Keep only one endpoint. Best thing is to use BULK IN endpoint.

2. #define CY_FX_EP_BURST_LENGTH          (15)     /* Super speed burst length in packets. */

3. Once you change CY_FX_EP_BURST_LENGTH, then it will be updated in the following places:

epCfg.burstLen = CY_FX_EP_BURST_LENGTH;

dmaCfg.size  = (2*1024 * CY_FX_EP_BURST_LENGTH); and 

in the descriptors, 

 /* Super speed endpoint companion descriptor for consumer EP */

    0x06,                           /* Descriptor size */

    CY_U3P_SS_EP_COMPN_DESCR,       /* SS endpoint companion descriptor type */

    (CY_FX_EP_BURST_LENGTH - 1),    /* Max no. of packets in a burst(0-15) - 0: burst 1 packet at a time */

    0x00,                           /* Max streams for bulk EP = 0 (No streams) */

    0x00,0x00                       /* Service interval for the EP : 0 for bulk */

 

Regards,

sai krishna.



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