GEL files in CCS v5.2

John,

This is not a device question, so instead of being in the C67x Single Core DSP Forum, this will be moved to the Code Composer Forum where it will get the best quality of answer.

Honestly, I always have a hard time remembering how to get to the GEL files access window in CCSv5.2. And the interface with the box where you can write individual commands is gone. But you can still write any GEL files and use menuitem and hotmenu for putting commands under the Scripts menu item in CCSv5.2. I think you try to find Control Panel, under View or Window->View, and that Control Panel has the Memory Map and GEL Files and some debugger configuration settings.

The same GEL files from CCS 3.1 will work with CCSv5.2, so there is nothing additional to learn about writing the files themselves. CCSv5 has some good Help files that you can reference for some specific functions.

Regards,
RandyP

Gents,

Thanks for the tips. You gave me a lot of sources to read. I appreciate it a lot.

However, I am still struggling to find out how to execute a UI action from the Chassaing book. I believe I am very close, but after a lot of reading, I still do not understand how to use the scripting console to accomplish what was apparently a menu click action in CCS v3.1.

How do I accomplish the equivalent of the following instructions?
Select GEL -> Sine Gain -> Gain

Below is a screenshot of my debugging session, with the GEL file successfully loaded in the control panel, and the Scripting Console open with some terrible attempts to follow what you suggested. Thank you for any more help.

John Grant1 said:

How do I accomplish the equivalent of the following instructions?
Select GEL -> Sine Gain -> Gain

It should appear under the 'Scripts' menu in CCSv5. 'Scripts->Gain'.

John Grant1 said:

Below is a screenshot of my debugging session, with the GEL file successfully loaded in the control panel, and the Scripting Console open with some terrible attempts to follow what you suggested.

To call it from the scripting console, you need to call the actual name of the function, not the name of the hotmenu item. If you open the gel file, you can file the function names.

Thanks

ki

Amazingly, I found the answer after posting. The GEL wiki page shows the menu item that can be clicked (under Scripts menu on CCS's top toolbar).

I used the slider to change the value (shown as 27). Then I paused the debug session to see if the slider affected the variable.

I have a new screenshot of my debugging session. If you look at the value of "gain" (in the Expressions window at the top of the screenshot), gain has a value of 10. Interestingly, when the debug session is paused, interaction with the slider actually affects the value shown, like I would expect.

Also, when I closed the debug session, I saw an error message. Do you know why I have this error?

Hi ki,

What do you mean by,

Ki-Soo Lee said:

If you open the gel file, you can file the function names.

In my screenshot, I show the opened GEL file. What code will do what you say? I also showed my attempt at scripting, which used the ds.expression.evaluate syntax like you suggested earlier.

Thank you for your help,
John

John Grant1 said:

Interestingly, when the debug session is paused, interaction with the slider actually affects the value shown, like I would expect.

Most target memory accesses (like GEL memory accesses) require the target halted before the memory access can take place.

John Grant1 said:

Also, when I closed the debug session, I saw an error message. Do you know why I have this error?

Could you provide the error log? I think you can get to it from the Window->View->Other->Error (sorry I don't know for sure, I'm out of the office so I don't have CCS install handy)

Thanks

ki

Hi ki,

Thanks for working with me on this. I'll try the 'activeDS' in a minute.

Here are the "details" from the pop-up error message dialog,
"An error has occurred. See error log for more details. The function "getGelFiles" returned an error condition  (0x80780001)"

...and here is a screenshot of the Window->Show View->Error Log:

I have high lighted (in blue) my attempt to use the 'activeDS' as you suggest to launch the GEL slider. I do not understand where this magic variable (activeDS) comes from. Also, the error in the Scripting Console is different than when I tried to use the 'ds' service, which means I am closer to a solution by using 'activeDS'.

Thank you for the suggestion. Do you know how I can finish the script command to launch the GEL slider? As demonstrated in the screenshot below, this is not working:
js:> activeDS.expression.evaluate("Gain")
Error evaluating "Gain": identifier not found: Gain

John Grant1 said:

I do not understand where this magic variable (activeDS) comes from.

activeDS stands for the current debug session. It is "hidden" because its use was previous discouraged though I feel that should not be the case.

ds stands for debug server.

You normally create a debug session instance from a debug server. It is the debug session that you need to communicate to your target. When you start the debugger, ot creates a debug session.

John Grant1 said:

Thank you for the suggestion. Do you know how I can finish the script command to launch the GEL slider? As demonstrated in the screenshot below, this is not working:
js:> activeDS.expression.evaluate("Gain")

Did you try passing in a parameter for Gain?

Ki-Soo Lee said:

Did you try passing in a parameter for Gain?

No, I have no idea what the code would look like to do this.

Try passing in a parameter to Gain. Like:

js:> activeDS.expression.evaluate("Gain(5)")

I tried a value of '22'.

js:> activeDS.expression.evaluate("Gain(22)")
Error evaluating "Gain(22)": identifier not found: gain
    at gain=gain_parameter [gain.gel:7]
    at Gain(22)

js:> activeDS.expression.evaluate("Gain(10,35,5,1,22)")
Error evaluating "Gain(10,35,5,1,22)": identifier not found: gain
    at gain=gain_parameter [gain.gel:7]
    at Gain(10, 35, 5, 1, 22)

Also, the Console window shows this when I physically move the GEL slider:

Gain(16) cannot be evaluated.
identifier not found: gain
    at gain=gain_parameter [gain.gel:7]
    at Gain(16)
Gain(15) cannot be evaluated.
identifier not found: gain
    at gain=gain_parameter [gain.gel:7]
    at Gain(15)
Gain(29) cannot be evaluated.
identifier not found: gain
    at gain=gain_parameter [gain.gel:7]
    at Gain(29)