DLP3010EVM-LC： Maximum number of registered pattern set orders

Hello Tak-san,

Welcome back to the forum!

I will look into this for you and return with an answer shortly.

Regards,
Austin

Hi
Austin,

Thank you for your answer.
I understand this question.

However, I'm sorry
I was making a mistake.
The maximum number you want to know is about "Pattern Set Entry".

Please refer to the example below.

"Pattern Set Entry" is as long as the flash capacity
Is there a problem with the maximum number?

Regards,

Tak

Hi
Mayank,

Thank you so much.
I understand the answer.

What we want to do
Uses 8-bit monochrome data,
I want to project a fixed pattern that specifies brightness (0 to 255 levels) in one shot.
I can't find a way.
Is there any good way?

Regards,

Tak

Tak,

Is the pattern that you want to display a row repeated or column repeated pattern?

Also, I didn't understand what you meant displaying in one shot. Can you please elaborate this a bit more.

Regards,

Mayank

Mayank,

The image may be vertical or horizontal as it is a solid view

I just want to determine the brightness level with software and only expose once.

Can you see in the image below?

Regards,

Tak

Hi
Mayank,

Thank you for your answer.

What kind of setting
Can you tell me if it can be achieved?

If you want to rewrite to flash every time
Which is the response time of the application
I would like to avoid that method because it will be a heavy load on the flash.
(I think you can understand it by looking at the flow of this question.)

Regards,

Tak

Tak,

How frequently do you need to be able to rewrite the flash image? Do you expect to exceed the life of the part?

- Philippe Dollo

Hello
Philippe Dollo,and Mayank,

Thank you for your response.
(Sorry, I didn't quite understand the "Verify Answer" button...)

・About flash questions

In normal operation, it is designed so that it will not be used up to the maximum number of times Flash can be rewritten.
However, the number of rewrites is unknown because this function depends on the user's usage.

Also, on systems that use our Internal mode, this feature
The user will be limited in the number of times the flash can be rewritten and the processing time.
I want to avoid it if possible...

・Request

We believe that our problem can be avoided if either of the following functions can be realized.
① Up to about 300 pattern sets can be registered. You can also refer to the pattern set (eg 0 to 299) in the pattern order.
② It is possible to project by specifying 1 to 8 (or 6) in the pattern set.

Is it possible to convey this desire with the next improved firmware?
Please.

and...
we'll be on vacation for the next week.
We look forward to seeing a good reply in a week.

Regards,

Tak

Tak,

With respect to your query regarding 8bit grayscale pattern display - 

As said earlier - one of the possible ways to achieve it is via internal pattern mode. 

Eg. Suppose you want to display 256 patterns each corresponding to grayscale value - you can display these 256 patterns with exact same exposure time by clubbing 8 patterns in each of the 8bit horizontal pattern sets. You will require 42 patterns sets to do so.

Regarding your other requests - 

1. Regarding adding support for more than 128 pattern sets in the pattern order table. - Currently, due to system limitations, this cannot be achieved. I will propose this as a potential requirement to the team for future releases.

2.  It is possible to project by specifying 1 to 8 (or 6) in the pattern set. >> I couldn't get this query, can you please elaborate a bit. If the query is regarding maximum number of 8 bit patterns supported in a pattern set - then yes, it is 6 for vertical type of patterns and 8 for horizontal type of patterns.

Regards,

Mayank

Hi
Mayank,

Thank you for your reply.

Your example is close to what I think.
"by clubbing 8 patterns in each of the 8bit horizontal pattern sets"
-> I would like to know the specific method for the text here.
Which register control is possible?

Other
My request
Thank you for telling us about ①.
Regarding ②, the same thing as the question contents now is stated.
So "by clubbing 8 patterns..."
Please tell me about

Regards,

Tak

Mayank,

Thank you for your response.

The outline of the internal pattern is
I understand it to some extent....

And what you are telling
I think it is the image shown below.

My question is only the red letter pattern (249) in this table
I don't know how to project it, so can you tell me?

For example
Using Write Pattern Order Table Entry (98h)
Pattern Set Entry Index → ​​41
Number of patterns to display → 4
Even if you specify
The result is projected as 246,247,248,249.

This result is different from the purpose of
I only want to project pattern 249.

Please tell me how.

Regards,

Tak

Hello Tak,

Thank you for your patience as Mayank looks into this question for you.

Regards,

Austin

Mayank,

Proposed Thank you.

Using your proposed "Write Internal Pattern Control",
I confirmed "pause" and "step".

However, "step" was not enabled without executing "start".
That is, until the target pattern is projected up to step,
Other pattern projections and triggers will be output.

As I wrote an example the other day
I want to project only 249, the directly specified pattern.
I don't want to project anything other than pattern 249.

Did your proposal make it happen?
Is my method wrong?
If you could, could you give me a detailed explanation?

I'm sorry to ask you many times
Please answer.

Regards,

Tak

Mayank,

I understand your answer.

Ideally, I would like to solve it with the proposal of "2."
Currently, it cannot be used because it has up to 128 patterns.

So use your proposed "Write Internal Pattern Control",
I am trying to solve the purpose with "pause" or "step".

But I found strange behavior.
It is the image which pushed "step" at 1 second intervals for 8 patterns.
Please see the video below.

Please watch about 5 seconds and 12 seconds of the image.
The pattern is changing from the normal pattern.

Does this also reproduce on your EVM?
Or is my EVM broken?

(It was the same in the trigger input mode)

I have other questions, but first of all, this is an important issue

Please confirm.

Regards,

Tak

Tak,

Thanks for sharing your video. Do you have your pattern configuration available to share (along with a system binary) to reproduce the issue?

Regards,

Philippe Dollo

Tak,

I am able to reproduce the issue which you are seeing.

Do not worry, this is not a hardware issue but a firmware issue.

I will look into this issue in more detail to figure out the root cause. 

Till that time is it possible for you to go with the second approach via which you can display 128 patterns separately instead of 256?

Regards,

Mayank

Mayank,Philippe Dollo,

Thank you for your immediate confirmation.

I was relieved that the cause was not a hardware problem.
Please elucidate the cause.

Our system will be completed in October.
At that time it should work normally.

For the second way you can display 128 patterns individually
It is difficult because it is necessary to decide one of them in terms of system design.

Alternatively, use the second method to create more than 256 pattern sets
If the fix is ​​quick and easy, consider this approach as well.

First of all, please ask us to clarify this issue,
Please tell me which decision to fix based on the results of the clarification.

Please contact me.

Regards,

Tak

Hello Tak,

Thank you for your patience. We will back to you with an answer soon.

Regards,

Austin

Tak,

I understand your concerns related to the system completion timeline.

It's will not be possible to increase the support for the maximum number of patterns sets from 128 to 256.

Regarding the issue which you found in the first approach - I am currently discussing this with my internal team, I will update you once we figure out the root cause behind it.

I will also let you know about a rough timeline as to when the fix for it will be available once the root cause is found out.

Regards,

Mayank

Mayank,

Thank you very much for contacting me.
I understand the pattern set.

Now let's design the system by using "pause".
I will proceed.
(Currently designed using "pause" and trigger input)

If the progress becomes clear, please contact me again

Regards,

Tak

Tak,

Thanks for your patience, I will keep you updated.

Regards,

Mayank

Mayank,

Please continue to investigate
About solution
Thank you very much.

Regarding the maximum number of pattern sets I had in my previous question,
It turned out to be a maximum of 256, which was helpful.

However, this solution is effective only if it has a function to display 256 patterns,
In fact, our system also requires the display of 256 patterns and other patterns.

Initially, I was thinking of the following pattern set.

Pattern set (0 to 255): 1 pattern
+
Pattern set (256)…8 patterns
Pattern set (257)…2 patterns
Pattern set (258-267)... 1 pattern

So my system needs a total of 268 patterns,
If this number can be achieved, only by setting the pattern order table
I can solve it.

Is it possible to raise the maximum value of 256 patterns in the pattern set to 268?
(It will also lead to cost reduction of hardware...)
If you can't do this, you'll be using the other day's idea, "pause",
It is necessary to deal with the mysterious behavior of the "pause" function.

Could you please consider it?

Regards,

Tak

Tak,

My responses to your queries are as follows - 

1. Is it possible to raise the maximum value of 256 patterns in the pattern set to 268? >> Currently, this is not possible. 

2. If you can't do this, you'll be using the other day's idea, "pause",
It is necessary to deal with the mysterious behavior of the "pause" function. >> We are looking to the cause of this behavior. But I cannot commit that this will get fixed by October timeframe.

I would recommend you to display the patterns by taking into consideration the limitations of DLPC3478.

I will inform you once we have found out the cause of (2)

Regards,

Mayank

Mayank,

Thank you for your answer.

About 1.
OK.

About 2.
I understand that I can't promise until October
Please promise to fix it.

I'll be honest with customers about the current "pause" limits.
Therefore, we hope to have the cause and solution as soon as possible.

Please contact me if there is any change.

Regards,

Tak

Mayank,

Did you solve the "pause" problem?
Please tell us about the situation.

Regards,

Tak