DMA register undefined

XINJUN DONG

Other Parts Discussed in Thread: CONTROLSUITE

Hey, guys,

I am using F28069 right now. I am trying to use DMA to read the ADC result. I follow the example in the ControlSuite. Here is part of my code:

EALLOW;
// Perform a hard reset on DMA
DmaRegs.DMACTRL.bit.HARDRESET = 1;
__asm (" nop"); // one NOP required after HARDRESET
// Allow DMA to run free on emulation suspend
DmaRegs.DEBUGCTRL.bit.FREE = 1;
EDIS;

This code can reset the DMA, but I got an error that DmaRegs is undefined.

But if I move the mouse to DmaRegs, it shows volatile struct DMA_REGS DmaRegs; I assume it means it is already defined. Moreover, if I run the project without, I can still get the value from that register through the Expression window in the CCS. I hope anybody can help me. Thank you in advance.

Xinjun

over 12 years ago

0 Igor Gorbachev over 12 years ago

Guru 20525 points

Hi Xinjun!

"volatile struct DMA_REGS DmaRegs" is defined at F2806x_GlobalVariableDefs.c. But perhaps you didn't include F2806x_Dma.h in your project. In this file:

extern volatile struct DMA_REGS DmaRegs;

Regards,

Igor

0 XINJUN DONG over 12 years ago in reply to Igor Gorbachev

Intellectual 300 points

Hey, Igor

Thank you for your reply. I think I have included the F2806x_Devic.h in my head file, which contains F2806x_Dma.h. So maybe this is not the reason for my compile error. Thank you.

Xinjun

0 Lori Heustess over 12 years ago in reply to Igor Gorbachev

TI__Guru* 93800 points

Igor Gorbachev said:
"volatile struct DMA_REGS DmaRegs" is defined at F2806x_GlobalVariableDefs.c.

Xinjun,

Do you have the above mentioned file in your project? This is where the instance of DmaRegs is created.

It is in the C:\ti\controlSUITE\device_support\f2806x\<version>\F2806x_headers\source folder.

Lori

0 XINJUN DONG over 12 years ago in reply to Lori Heustess

Intellectual 300 points

Lori,

Yes, I have this file in the project. And most of other registers defined in this file work properly, such as ePWMs, Adcs. Thank you.

Xinjun

0 Igor Gorbachev over 12 years ago in reply to XINJUN DONG

Guru 20525 points

Hi Xinjun!

Could you please attach screenshot with your error message "DmaRegs is undefined".

Regards,

Igor

0 XINJUN DONG over 12 years ago in reply to Igor Gorbachev

Intellectual 300 points

Hi Igor

Here is the screenshot of the error.

Thank you.

0 Igor Gorbachev over 12 years ago in reply to XINJUN DONG

Guru 20525 points

Hi!

So...I suspect that your file StateMachine.c does not contain the following: #include "F2806x_Dma.h".

Regards,

Igor

0 XINJUN DONG over 12 years ago in reply to Igor Gorbachev

Intellectual 300 points

Hey,

I really hope that is the problem, but in the Statemachine.c, I have included the defitions.h which contains the "F2806x_Dma.h". Thank you very much. I appreciate your help very much.

Xinjun

0 Igor Gorbachev over 12 years ago in reply to XINJUN DONG

Guru 20525 points

Hi!

And the last. Yet check that file F2806x GlobalVariable Des.c is presented in your folder Source. And try to include file "F2806x_Dma.h" into Statemachine.c explicitly.

Regards,

Igor

0 XINJUN DONG over 12 years ago in reply to Igor Gorbachev

Intellectual 300 points

Hey, Igor!

Yes, it works after I include "F2806x_Dma.h" explicitly. Thank you so much for your help. I am still confused that why I need to include that header filer twice since it has already been included in the "F2806x_Device.h". Thanks again.

Xinjun

0 Igor Gorbachev over 12 years ago in reply to XINJUN DONG

Guru 20525 points

Hello Xinjun!

Well, if you want to have in your project it was all right and strictly perhaps the best way is to build the project again. But this way takes some time. If you are not limited in resources of time then I would recommend you to do so in order in further to avoid compiler warnings like : "redefinition of symbol". This happens when the header files are included incorrectly. Thus the hierarchical structure of the header files is broken. But the above-mentioned warnings are usually not affect the workability of the project. So you can continue to work with your project without much worry.

Regards,

Igor

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DMA register undefined