Compiler/TMS320F28035: Running Code as Stand Alone Application

sagar shah54

Tool/software: TI C/C++ Compiler

Hello I am trying to use the code as standalone application in 28035. I have been able to flash the code successfully on my custom board.

I have followed the this document -http://www.ti.com/lit/an/spra958l/spra958l.pdf

I am able to flash code using JTAG. But it does not run as stand alone application.

memcpy((void *)0x000D06, (Uint16 *)&PieVectTableInit+6, 256-6) This causes error of PieVectTableInit not initialized.

So I have commented that line and it Runs in flash but not in standalone mode.

My Procedure is as followed:

Remove the 28035_RAM_Ink.cmd from my project

Add the F28035.cmd into my project (Right click on my project -> Add files -> F28035)

Add the following piece of code into my main function:

/*** Initialize the PIE_RAM ***/

PieCtrlRegs.PIECTRL.bit.ENPIE = 0; // Disable the PIE

asm(" EALLOW"); // Enable EALLOW protected register access

memcpy(&PieVectTable, &PieVectTableInit, 256);

asm(" EDIS"); // Disable EALLOW protected register access

// Copied time critical code and Flash setup code to RAM

// This includes the following ISR functions: epwm1_timer_isr(), epwm2_timer_isr()

// epwm3_timer_isr and and InitFlash();

memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (Uint32)&RamfuncsLoadSize);

over 7 years ago

0 Manoj Santha Mohan over 7 years ago

TI__Guru 55700 points

Please check these suggestions out.
processors.wiki.ti.com/.../FAQs

Regards,
Manoj

0 sagar shah54 over 7 years ago in reply to Manoj Santha Mohan

Expert 2125 points

I referred that Still I am not sure why it is not working!
Is there any Documentation available to refer the steps for it?

0 Whitney Dewey over 7 years ago in reply to sagar shah54

TI__Guru 54345 points

Thank you for your patience. Are you still having trouble with this issue?

If so, can you give me a little more explanation? Did you try the debugging technique mentioned on the wiki page Manoj linked you to? What did you see?

Thanks,
Whitney

0 sagar shah54 over 7 years ago in reply to Whitney Dewey

Expert 2125 points

Hi Whitney,

I am able to Run in standalone mode now. But I have a problem.
The Epwm isr runs at slower rate in standalone mode than at flash using JTAG.
So I have copied EPWM isr to ram but still it is taking long time to trigger in standalone mode.

Can you explain what could be the cause?

Thanks
Sagar

0 Whitney Dewey over 7 years ago in reply to sagar shah54

TI__Guru 54345 points

Are you saying that the ISR is taking longer to execute or that the latency to get into the ISR is greater? The EPWM itself is running at the same frequency, correct?

How are you measuring this? Toggling a GPIO in the ISR?

Whitney

0 sagar shah54 over 7 years ago in reply to Whitney Dewey

Expert 2125 points

I mean there is latency to get into ISR. Yes I am toggling Gpio in ISR.
Epwm is running at different value of Tbprd. But the same code in Emulation works fine. I mean there is no latency to get into ISR but when I use a standalone mode there is a latency to get into ISR. I have measured the Gpio timings in the scope too.

Thanks

0 sagar shah54 over 7 years ago in reply to sagar shah54

Expert 2125 points

Hey Whitney-

I still have this odd problem. The is latency in which epwm isr triggers. in Emulation mode there is no latency in epwm isr to trigger. But in standalone mode there is latency for the Epwm ISR to trigger for same code.

So what should I do to reduce the latency? Also the epwm ISR exception time is constant but there is latency difference in both modes.
I hope you understand the problem now.

0 sagar shah54 over 7 years ago in reply to sagar shah54

Expert 2125 points

Hey Whitney,

Did you have a chance to look at my previous comment and understand the problem?

Thansks

0 Whitney Dewey over 7 years ago in reply to sagar shah54

TI__Guru 54345 points

I noticed you made another post on your PWM issue:

e2e.ti.com/.../2480007

For the sake of not having duplicate threads going, I'm going to close this thread and we'll work on resolving your issue in the new one.

Whitney

0 sagar shah54 over 7 years ago in reply to Whitney Dewey

Expert 2125 points

I am really having an issue and want to resolve this problem asap as I have product release soon. Is there any way I can have it someone view it in expedited?

The problem is that I have been getting response very late. So whats the way to have that happen quickly resolved?

Is there a way I can get hold of an expert directly and not going through so many things back and forth over a lot days?

Thanks

0 Whitney Dewey over 7 years ago

TI__Guru 54345 points

For those who may be following this thread, the issue was resolved here: e2e.ti.com/.../2488107

Closing this thread.

Whitney

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Compiler/TMS320F28035: Running Code as Stand Alone Application