6 Replies Latest reply on Oct 4, 2016 2:06 PM by joseph.rojas

AN75779 hangs again...

user_6806705 Aug 18, 2017 1:23 PM

Hi all,

after having updated my AN75779 based project with the help of Technical Support, that gave me Rev Q215, I was happy to see that INVALID_SEQUENCE errors disappeared; and the new frame timeout system saved some bad situation...

But my happiness ended when I discovered that the frame acquisition sometime stops suddenly and there is no way to restore it. This problem is random: may happen after few minutes or hours. From the serial debug I get no errors, it seems all right but the acquisition cannot recover; the only way is a reboot.

I already tried: CyU3PPibDeInit/CyU3PPibInit, CyU3PDmaMultiChannelDestroy/CyU3PDmaMultiChannelCreate, CyU3PUsbResetEndpointMemories, but the acquisition remains stuck or sometime only few garbage bytes are returned.

How can avoid this? Or, at least, restore the acquisition...

Thank a lot!

1. Re: AN75779 hangs again...

dhritimank_56 Mar 2, 2016 3:25 AM (in response to user_6806705)

Hi,

Please create a technical support case for this issue.

Regards

Dhritiman
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2. Re: AN75779 hangs again...

joseph.rojas Sep 20, 2016 7:05 AM (in response to user_6806705)

dadeur, Could you explain how do you solved your INVALID_SEQUENCE errors, I'm facing the same problem right now with the AN75779 original source code. Thanks.
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3. Re: AN75779 hangs again...

user_6806705 Sep 25, 2016 11:32 PM (in response to joseph.rojas)

Hi joseph, Cypress support provvided me AN75779 Rev. Q215 (I think now they updated the public version too) that implements a timeout timer. If someting goes wrong the procedure will abort the current frame and start the next avoiding INVALID_SEQUENCE error.

I had other problems after updating my code but I discovered that were caused by an instability of video bus signals. Regards.
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4. Re: AN75779 hangs again...

joseph.rojas Sep 26, 2016 2:27 AM (in response to user_6806705)

Hi Dadeur, thanks for your answer. In the updated public version of the AN75779 source code there is nothing related with a timeout timer (I have downloaded it again to try just in case. Last Updated: Mar 24, 2016, Ver. *G). Please could you send me a copy of AN75779 Rev.Q215? Thanks.
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5. Re: AN75779 hangs again...

user_6806705 Oct 2, 2016 11:11 PM (in response to user_6806705)
Hi joseph, I hope this will help you.

AN75779_Q215.zip 62.2 K
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6. Re: AN75779 hangs again...

joseph.rojas Oct 4, 2016 2:06 PM (in response to user_6806705)

Thank you very much dadeur. I'll have a look. It seems to be a quite different approach.
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