failed to load patterns and/or skipping patterns in when displaying in pattern sequence mode

Hi Bing,

did you solve your problem?
I would like to ask you,  how many patterns you were able to run at 1khz? I mean, did you load your own patterns?

thanks.

Pablo

Dear Pascal,

I would like to ask a question regarding this problem. I would like to load in to lightcrafter a lot of images. I was making some test and I found that my limit is 256 images. To make this tests I used the "DLP LightCrafter API Sample Code - Windows v2.0", and running the program in visual studio. The behavior obtianed is:

- number of images < 256, works perfectly

- number of images > 256 (280 for example) I am able to see just the last 256 images (and the first 24 images are lost) seems a circular buffer limitation. 

This seems strange because the command interface guide says that the max number of patterns should be 1000. So an extreme test that I have done was loading the same 280 images, but this time using the GUI, and I was able to see correctly all the images.

I am wondering if I am using an old version code of "DLP LightCrafter API Sample Code - Windows v2.0" and if is available a new one.

Thanks for your help.

Pablo

Yes I am running in auto mode. I did make sure the setting was correct (if not, I will get pop up window telling the loading failed). The GUI version was 3.8 (since I am using laser, had to backed out latest firmware update). 

Pablo, I am loading 96 patterns. I tried to load via matlab code to load multiple patterns, but never quite sure if I was able to load them all successfully... So now I switched to loading from GUI and only control start/stop from my Matlab code.

It seems you were able to load much more patterns, would it be ok for you to share with me how you did it? Also how did you validate the loading was successful?

Thanks!

I tried as well to use matlab to interact with lcr but I basically never succeed, probably i will come back with that in the future. Anyway, in TI web site is also available the source code ("DLP LightCrafter API Sample Code - Windows v2.0")  I am using that and visual studio as is suggested in the readme file.  Are you able to find that? is so you should use the demo 5. 

You can see that the loading was successful because then I am able to see with my eyes the images correctly loaded.

Ah, take into account that I have the following versions:

DM365 4.0
FPGA 2.6.43
MSP430 2.7

GUI version 4.0.1

Pablo
 

I think I got my answer but still I need to make my tests to understand what is the maximum numbers of images that is possible to load (seems around 1000 - 1500 - 2000 according on what I read in the forum).

In  lcr_cmd.cpp the following edit:

ErrorCode_t LCR_CMD_DefinePatternBMP(LCR_PatternCount_t PatternNum, char const *fileNameWithPath)
{
	/* Generate packet - the old version*/
	/*
	LCR_CMD_PKT_CommandInit(LCR_CMD_PKT_TYPE_WRITE, 0x0401);
	LCR_CMD_PKT_PutInt((int)PatternNum, 1);
	LCR_CMD_PKT_PutFile(fileNameWithPath);
	if(LCR_CMD_PKT_SendCommand())
		return FAIL;

	return SUCCESS;
	*/

	/* Generate packet  - new version*/
	LCR_CMD_PKT_CommandInit(LCR_CMD_PKT_TYPE_WRITE, 0x0481);
	LCR_CMD_PKT_PutInt((int)PatternNum, 2); //change  1 with 2
	//column and row position
	LCR_CMD_PKT_PutInt((uint32)0, 4); 
	LCR_CMD_PKT_PutFile(fileNameWithPath);
	if(LCR_CMD_PKT_SendCommand())
		return FAIL;

	return SUCCESS;
}

But probably I need to check also in " ErrorCode_t LCR_CMD_ReadPattern(LCR_PatternCount_t PatternNum, char *fileName) " maybe something like:

/* Generate packet - old version  */
	/*
	LCR_CMD_PKT_CommandInit(LCR_CMD_PKT_TYPE_READ, 0x0401);
	LCR_CMD_PKT_PutData((uint8*) &PatternNum, 1);
	LCR_CMD_PKT_SendCommand();
	LCR_CMD_PKT_GetFile(fileName,numbytes);
	*/
	LCR_CMD_PKT_CommandInit(LCR_CMD_PKT_TYPE_READ, 0x0481);
	LCR_CMD_PKT_PutData((uint8*) &PatternNum, 2);
	LCR_CMD_PKT_SendCommand();
	LCR_CMD_PKT_GetFile(fileName,numbytes);

But I am not so sure about that. Do I need to edit the code in other parts?

Thanks you for your help.

Pablo

Pablo,

Thanks a lot! I can't upgrade to the latest version though, but I still will give a try using C++ code.

Regards, Bing

I think you should upgrade your version. In the readme file there is a line such as:

"Important Note: The sample source code provided is compatible with DM365 v4.0 or later."

In the forum there are some topics on how to upgrade. I did that as well.

Pablo

I can't... I removed the light engine and the latest revision won't work this way...

I don't know exactly what are you doing, but you can plug in again the ligth engine, make this upgrade and then remove that again, to be clear you have two options:

* you can buy something like this  

* you can remove partially the engine. There are two flexi cables, a large one and a small one. well the small one probably is a sort of temperature sensor (maybe) you don't need to plug this one onto the driver board. In this way you have the dmd available for you.

Pablo

Hello Pablo,

About the maximum number of patterns possible this topic is discussed in this thread http://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/f/850/t/259451.aspx?pi201799=1

About your code modification, yes your changes at correct for the cmd 0x0481. I don't think you are required to make code changes at any other places, it should work fine.

Regards,

Sanjeev