Reading 32 bit Sigma Delta Filter Data in CLA

Prakash Kumar Thulasi Kumar

Expert 2015 points

Hi Guys,

CCS v 6.2(compiler version = TI v15.12.3.LTS)

TMX320F28075 Control Card

control Suite v 3.4.1

I want to read and store the 32 bit Sigma Delta Filter Data value in a variable inside CLA Task 1. So I wrote in the .cla file:

#pragma DATA_SECTION(SDFM1_Data,"Cla1ToCpuMsgRAM");
long SDFM1_Data1;

__interrupt void Cla1Task1 ( void )
{
SDFM1_Data1 = (signed long) (*(Uint32 *) ((Uint32) 0x5E16));
}

And during build, I get an "invalid type conversion" warning. When I run the program SDFM1_Data1 is updated and gives correct results.

But when I run the same code from CPU1 there is no warning. Why is it so and how to avoid the warning in CLA?

over 7 years ago

0 Manoj Santha Mohan over 7 years ago

TI__Guru 55700 points

Prakash,

Please try this...

SDFM_Data1 = *(int32 *)(0x5E16);

Regards,
Manoj

0 Prakash Kumar Thulasi Kumar over 7 years ago in reply to Manoj Santha Mohan

Expert 2015 points

Hi Manoj,
I still get the same warning.

Edit1 : I found that __TMS320C28XX_CLA__ is not defined in F2807x_Cla_typedefs.h. Is this a problem?

0 Manoj Santha Mohan over 7 years ago in reply to Prakash Kumar Thulasi Kumar

TI__Guru 55700 points

Prakash,

I don't think it has to do anything with F2807x_Cla_typedefs.h.

Please try this...

SDFM_Data1 = *(int32_t *)((uint16_t) 0x5E16);

Regards,

Manoj

0 Prakash Kumar Thulasi Kumar over 7 years ago in reply to Manoj Santha Mohan

Expert 2015 points

Now I get errors:

>> Compilation failure

viennaCLA/subdir_rules.mk:7: recipe for target 'viennaCLA/CLA_Tasks.obj' failed

"../viennaCLA/CLA_Tasks.cla", line 64: error #20: identifier "int32_t" is undefined

"../viennaCLA/CLA_Tasks.cla", line 64: error #29: expected an expression

"../viennaCLA/CLA_Tasks.cla", line 64: error #20: identifier "uint16_t" is undefined

"../viennaCLA/CLA_Tasks.cla", line 64: error #18: expected a ")"

And why are you using uint16_t when the data is in 32 bit format?

0 Manoj Santha Mohan over 7 years ago in reply to Prakash Kumar Thulasi Kumar

TI__Guru 55700 points

Prakash,

I'm using stdtnt.h definitions instead of F2837xS_device.h.

If you are using F2837xS_device.h definitions, try this if you haven't already...

SDFM_Data1 = *(int32 *)((Uint16) 0x5E16);

Since 0x5E16 is a 16 bit integer value, I'm first typecasting to Uint16.

Regards,

Manoj

0 Prakash Kumar Thulasi Kumar over 7 years ago in reply to Manoj Santha Mohan

Expert 2015 points

Hi Manoj,

I am using the F2807x_device.h definition and now it works without any warning.

The address 0x5E16 corresponds to Sdfm1Regs.SDDATA1.bit.DATA16 and as you told it is a 16 bit data.
And how are we getting a 32 bit data from this 16 bit data? Please clarify me.

0 Manoj Santha Mohan over 7 years ago in reply to Prakash Kumar Thulasi Kumar

TI__Guru 55700 points

Prakash,

Please check F2807x_sdfm_drivers.h....

For eg: For reading 32 bit and 16 bit data from SDFM1 filter1 data.

32 bit filter data is stored in 0x5E16 and 0x5E17.

16 bit filter data is stored in 0x5E17

Regards,

Manoj

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Reading 32 bit Sigma Delta Filter Data in CLA