Compiler/DLPLCR4500EVM: Unable to build SDK, please help

You nailed it, thanks ! It was built successfully with the 32b version
Just a quick question : I am not sure exactly how to use the SDK now that it is built. Say I want to write a simple code that tells me if the DMD is connected or not, I will want to write some main.cpp with the correct bool function in the main(), but what should I include exactly at the beginning of the file ?

To make my question clearer : the example cpp files (in the documentation) include header hpp files like "dlp_sdk.hpp", "common/debug.hpp", but I cannot find them in the built SDK directory. What is the correct process ?

Paul,

Thanks for your advice, I managed to get started with all this and am trying to understand how to use the SDK. I am trying to use basic functions to interface with the SDK, and tried to use the ProjectSolidWhitePattern and ProjectSolidBlackPattern functions, with the following code (editing the TIDA main.cpp file). There is no error, the connection works fine and the debug messages look good, but I cant see anything on the DMD ... Is there anything wrong ?


Thanks,
Tristan

Oh I was waiting for your answer, but just saw it now ! Thanks for your answer, still did not manage to make it work... But I managed to show black/white patterns by using this code instead (inspired from the definitions of ProjectSolidBlackPattern) :

I am interested in displaying a sequence of images from flash, while controlling the display moments with the trig in, and understood that this works (by choosing the correct bitplane, and activating Ext_positive triggering) :

Now, one issue arises when using External trigger with the sdk : at the end of the period time, the DMD displays a black pattern while waiting for the next trigger signal. This is annoying : I want the DMD to display an image when I trigger, and change when the next trigger arrives, without displaying something else (=black) in the meantime. This is possible in the GUI : unchecking the "Clear DMD after exposure" for all patterns does exactly what I want.

But I understood that the SDK would not work for that : the CreateSendStartSequenceLut function in lcr4500.cpp assigns insert_black bool to true when the trigger source is not Internal. So I changed this to false whenever the function (only this one) wanted to insert a black pattern. I recompiled the SDK, used the new libs to run my main.cpp program. See an example of my changes to lcr4500.cpp :

Problem, the sequence validation now fails : "Black Vector Missing when exposure less than frame period". This corresponds to an error on the BIT3 of the DLPC350_CheckPatLutValidate result. I have spent a lot of time in the source code of the GUI to understand if there is a trick when trig is ext_pos and insert_black is false simultaneously, but I cant find anything. I dont understand why this works in the GUI and not with my slightly modified SDK.

Can you please tell me how to proceed to get my result using the SDK ? (and modifying it a bit if necessary)

Is there a special parameter to set when you want the DMD to keep its pattern while waiting for the trigger input ?

Thank you very much, your help is very appreciated !

Tristan

Absolutely, period = exposure time works in the GUI. In the code, it is also the same as you can see from the screenshots.
How could it be too short ? It is 1 second in the code (1 000 000 microseconds), when I have used a lot periods of a few hundreds of us.

Moreover it worked with these exact parameters before recompiling the SDK, but with a mandatory insert_black parameter imposed by the SDK.

Tristan

Hi Tristan,

I missed that you set your exposure to 1s in your code - thanks for pointing that out. I don't believe that there is anything special going on in the GUI. Looking at the SDK, I saw the following. Please bear with me because I am not sure which code will exactly apply to your situation, so I'm just brainstorming:

// If using external trigger and NOT the first pattern, set the
            // previous pattern to clear the DMD after its exposure
            if( (sequence_LUT.size() != 0) &&
               ((pattern_entry.trigger_type == LCr4500::Pattern::TriggerSource::EXTERNAL_NEGATIVE) ||
                (pattern_entry.trigger_type == LCr4500::Pattern::TriggerSource::EXTERNAL_POSITIVE))){
                sequence_LUT.at(sequence_LUT.size()-1).insert_black = true;
            }

Did you change that last insert_black to false?

I'm digging into your question and seeing what else I can learn. I'll post back if I've got some for information for you. Would you be able to attach all of your code so that I can take a look at it?

Thanks,

Paul

Indeed, there is a warning in the GUI, but it still works. How can I force the SDK to ignore this warning ? What should I modify ?

I have changed all the insert_black in the lcr4500.cpp as you can see in the attached file.

Thanks very much for your help !

Tristan

4377.lcr4500.cpp

You'll need to modify how your code handles the value returned by "DLPC350_StartPatLutValidate" so that the flagged error doesn't stop anything.

-Paul