USB superspeed peripherals Forum Discussions

Hello all,

I developed a UVC driver with CX3. My image sensor has a resolution of 1920x1280. Normally, when I develop the driver at 1920x1280 resolution, the image does not appear. However, when I print frame info from the uart, frame size = 4972800B appears. If I set the resolution to 1920x1295 in the descriptor, based on the calculation that 1920*1295*2 = 4972800 corresponds to this frame size, the image appears. However, the extra parts of the image appear slightly distorted from the top and bottom. How can I set this buffer correctly and set it to 1920*1280*2 = 4915200B? Does anyone have any solution?

I am implementing a UVC application using a manual, 2 socket, many-to-one DMA. We are encountering output buffer overruns so I would like to send error packets to the sink to notify of this issue. Reading the UVC spec, it seems I can send UVC packets containing just the UVC header and error bit set for the duration of the overruns.

The example USBVideoClassBulk manually inserts buffers into a DMA channel with no buffers however I would be inserting into a DMA with 2 buffers per socket.

Is this understanding correct? If so, how can I insert an empty buffer into the existing DMA channel? If I am incorrect, how should I handle the output buffer overruns?

Hello,

I got CYUSB FX3 superspeed kit 49$ in order to get video from 16bit parallel thermal camera.

i used AN75779 example to get video and my pin connections:

D0-D15 parallel data 16bit

PCLK - PCLK

CTL12 - HSYNC

CTL11 - VSYNC

everything looks good measured HSYNC/VSYNC and PCLK looks good. but no video blank screen (on FX3 camera application from windows)

anyone knows why i cant get video?

should i modify state machine for my case? i just change to;

<?xml version="1.0" encoding="us-ascii"?>
<CyXmlSerializer>
<!--This file is machine generated and read. It is not intended to be edited by hand.-->
<!--Due to this, there is no schema for this file.-->
<CyGuid_7d237aff-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtGpif2exe" version="2">
<CyGuid_7d237b00-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtProject" version="1">
<ProjectDocs>
<CyGuid_7d237b03-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtItem" name="gpif2model.xml" persistent="./projectfiles/gpif2model.xml" target="7d237b02-d944-11da-aaba-00164119d63b">
<Hidden v="False" />
</CyGuid_7d237b03-d944-11da-aaba-00164119d63b>
<CyGuid_7d237b03-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtItem" name="gpif2view.xml" persistent="./projectfiles/gpif2view.xml" target="7d237b01-d944-11da-aaba-00164119d63b">
<Hidden v="False" />
</CyGuid_7d237b03-d944-11da-aaba-00164119d63b>
<CyGuid_7d237b03-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtItem" name="gpif2timingsimulation.xml" persistent="./projectfiles/gpif2timingsimulation.xml" target="3ad448c6-d155-4f76-a7fb-e760cd8e6feb">
<Hidden v="False" />
</CyGuid_7d237b03-d944-11da-aaba-00164119d63b>
</ProjectDocs>
<OutputDocs>
<CyGuid_7d237b03-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtItem" name="cyfxgpif2config.h" persistent=".\cyfxgpif2config.h" target="7d237afd-d944-11da-aaba-00164119d63b">
<Hidden v="False" />
</CyGuid_7d237b03-d944-11da-aaba-00164119d63b>
<CyGuid_7d237b03-d944-11da-aaba-00164119d63b type_name="CyGpif2Designer.Common.PrjMgmt.Model.CyPrjMgmtItem" name="cyfxgpif2config.h" persistent="C:\Users\volkan\Workspace\UVC_AN75779\fx3_uvc.cydsn\cyfxgpif2config.h" target="7d237afd-d944-11da-aaba-00164119d63b">
<Hidden v="False" />
</CyGuid_7d237b03-d944-11da-aaba-00164119d63b>
</OutputDocs>
</CyGuid_7d237b00-d944-11da-aaba-00164119d63b>
<Settings>
<Setting name="GPIF2_OutputName" value="cyfxgpif2config" />
<Setting name="GPIF2_OutputLocation" value=".\" />
<Setting name="GPIF2_Template" value="C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.3\GPIFII Designer\inputs\outputtemplates\cygpif2cheadertemplate.tpl" />
</Settings>
</CyGuid_7d237aff-d944-11da-aaba-00164119d63b>
</CyXmlSerializer>

THANKS

Hello,

I'm debug the CYUSB3014 evb board base on the an75779 demo code, when I enable the USB_DEBUG_INTERFACE in uvc.h, and install the driver, but when I use the Control Center, it only can write once, and need write success again, I add a printf in the UVCAppEP0Thread_Entry, it nerver goto this function, I think it doesn't make sense, I attach the project, can you give some suggestions, thanks.

Hello,

I need an example of CX3 Isochronous modes with MIPI csi camera sensors like OV5640 or others, I want to why you only provice CX3 Bulk modes + mipi sensors like ov5640/as0260. It seems that most of UVC camera use Isochronous modes, not bulk modes.

Thanks

We want to test the Synchronous transfer mode, can you provide the example？The example in SDK is bulk mode，Is there a tutorial if we modify it, or just fix descriptors in USB dscr?