SYNC signal

Youngjin Han

Intellectual 670 points

Hello Sanjeev,

I have a question about sync signal.

When I project 8 pattern image in sequence using DisplayPatternAutoStepForSinglePass, SYNC signal comes out 9 pulses.

SYNC is pulse signal to indicate when the pattern displays, so it should be 8 not 9.

Please let me know how to do it for coming out 8 SYNC signals.

YJ Han

over 9 years ago

0 Sanjeev over 9 years ago

TI__Mastermind 30875 points

Hello YJ Han,

I think this topic was discussed sometime back in this thread http://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/f/387/p/292052/1020409.aspx

In short, DisplayPatternAutoStepForSinglePass, basically it is software implementation, where it keeps track of the trigger pulses and after displaying all the pattern in the sequence for the exposure specified period, the MCU inside the controller disables the the o/p signals. This is the reason why you see 9 pulses, note, although 9th trigger pulse appear but there is no pattern exposure happens. The above E2E thread talks about the same.

Regards,

Sanjeev

0 Youngjin Han over 8 years ago in reply to Sanjeev

Intellectual 670 points

Dear Sanjeev,

I have more question about this.
Our customer asking about this urgently.
When I put n images, then is it always come out n+1 pulses ?
I think sometimes n pulses come out, sometimes n+1 pulses come out
Do you have method that come out n+1 pulses constantly ?

Regards

0 Youngjin Han over 8 years ago in reply to Youngjin Han

Intellectual 670 points

Hi, Sanjeev

I need your help on this issue.
What I'm asking is whether the SYNC signal always appears n+1 pusle or not.

Regards.

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