CCS/EK-TM4C123GXL: GUI Composer/CCS button widget question

Please take a look at the GUI Composer documentation resources under this link. This is more relevant for the cloud based GC designer. 
http://dev.ti.com/tirex/explore/node?node=AJvSrvufhzxVTyD9bKHSpw__FUz-xrs__LATEST

This similar forum thread might be helpful as well: https://e2e.ti.com/support/tools/ccs/f/81/t/778758

There are also several example GUIs available in the Gallery which can serve as a good reference and starting point for you to build upon:
https://dev.ti.com/gallery/

Hope this helps.

I looked at the forums you sent me, but I don't believe my problem requires JavaScript. I followed the suggestion on the bindable-trigger property of the button widget (i.e.: "trigger the action when BindableTrigger changes it to >0"). However, the problem is that one section of my code only executes on every other button press. Everything else executes except for a for loop. I even tried putting it into an if else statement, but that does not seem to work.

Am I missing something really obvious about GUI Composer? Do "samplesNumber" and "analyzingFreq" not update right away after I press "run correlation"?

Attached is a section of my code. The variables I am changing through the GUI are "samplesNumber" and "analyzingFreq". I want the code to run when I press "run correlation"

if (buttonCount > 0){
            runXCorr = true;
            createAnalyzingWave(analyzingFreq, analyzingWave);
            uint8_t i;
            uint16_t sum = 0;
            if (true){
                for(i = 1; i <= samplesNumber; i++){
                    createDataWave(dataWave);
                    sum = crossCorrelationV4(dataWave, analyzingWave) + sum;
                }
            }
            averageValue = sum / samplesNumber;

            oldButton = newButton;
            buttonCount = 0;
            counter++;
            runXCorr = false;
            i = 1;
        }

Hello user,

When the button is pressed, the bindableTrigger will increment itself once. Where is samplesNumber and analyzingFreq defined?

What transport/model are you using?

Regards,
Patrick

I am defining samplesNumber and analyzingFreq as global variables, since I believe they need to be global variables to communicate with the GUI. The code that I presented on April 28th is inside a while(1){} loop, so it runs continuously.

I am using XDS as my transport method.

Thank you for your time.

XDS transport uses a (polling) program model. When the buttonTrigger changed, the value is sent to the device. All bindings will be updated on the next polling cycle.

I want to confirm if my understanding is correct:

Let's assume I enter a frequency and a number of samples. Then, when I press the run correlation button, the GUI sends the frequency and the number of samples for that particular polling cycle. However, if I update the 2 values after the next polling cycle, then when I press run correlation, nothing will happen.

Is that the correct way to think about it?

When you press the button, the GUI doesn't send frequency and number to the device. Pressing the button will change the bindableTrigger. If you bound the button's bindableTrigger to a device variable. Lets set myBindCounter, than myBindCounter will be incremented by one.

If you have bounded the frequency and sample text box's "value" button to your device's variable, than when ever you enter the value in the text box, GC will immediately sends the value to your device.

What I am referring to for polling is that the other values that you bounded to the device will not be updated until the next polling cycle. Lets say you change frequency by enter a value in the text box, sample will be updated if the value from the device is different than what is known by GC. Bounded values will be automatic updated both (two way databinding) ways if there a change detected.

From your sample code and screen shoot. I don't see how you bounded the sample and the frequency to the global variables. Without seeing your application, my guess is that most likely you didn't bound these two text box widgets' value property to your device's global variables and you didn't call gc.databind.registry.getBinding('my_model.mydevice_variable').getValue() to get the value for sample and frequency before using it in your JavaScript code.

1. I am unclear on your third paragraph. You said that "sample will be updated if the value from the device is different than what is known by GC". What value are you referring to?
2. In regard to the 4th paragraph, I bound the widgets for analyzing frequency, number of samples, and maximum correlation to global variables in the Code Composer Studio program.
3. I don't have any JavaScript code; all I'm doing is using GUI Composer on Chrome. My main goal right now is for the program to calculate the maximum correlation value each time I press the run correlation button. Is JavaScript necessary for me to fulfill this goal?
4. On a side note, where do I need to call gc.databind.registry.getBinding('my_model.mydevice_variable').getValue()?

I appreciate your help.

1. I suppose I could print create another widget in GUI Composer to display the samplesNumber variable; I don't know how to print out a value in CCS. However, I'm confused as to why seeing if this value is updated is necessary.
2. For your last paragraph, I don't know why it's necessary to create a timer to loop through the if (buttonCount > 0) condition. Should I do this because XDS updates at set intervals?

Thank you for your help; again, I appreciate your time.

Your timer comment actually gave me an idea. I put a slight delay in my while loop, and it seemed to fix the problem.