TMS320F28062: RFFT_adc_f32 doesnt work dsp library 1.5

Jeff Thompson

Prodigy 20 points

Part Number: TMS320F28062

I notice that when I call RFFT_adc_f32 it never returns from call forcing a reset.

Seems to be the same for version 1.4 as well.

I have included the source in my project and it still does it.

calls to RFFT_f32_sincostable(); and CFFT_f32_sincostable(); work fine.

When I single step through the code it jumps to the following fine:

_RFFT_adc_f32:
ADDB SP,#2
MOVL *-SP[2],XAR4
LCR _rfft_adc_f32_Stages1and2and3andBitReverse
;MOVL XAR4,*-SP[2] ;comment this out only for
;adc version of RFFT
LCR _rfft_adc_f32_Stages4andUp
SUBB SP,#2
LRETR

After executing the following "LCR _rfft_adc_f32_Stages4andUp" the stack pointer no longer contains the correct return address.

over 8 years ago

0 Vishal_Coelho over 8 years ago

TI__Mastermind 20850 points

In your linker command file which memory is the stack section allocated to? and what is the allocated size? Are you able to step through the function rfft_adc_f32_Stages4andUp? which memory is this code running from?

0 Jeff Thompson over 8 years ago in reply to Vishal_Coelho

Prodigy 20 points

Hi Vishal,

Thanks for your fast response, turns out the issue was simple.

I was passing this:

pfft_adc->Tail = pfft->OutBuf;

instead of this

pfft_adc->Tail = &pfft->OutBuf;

RFFT_F32_STRUCT fft;

RFFT_F32_STRUCT* pfft = &fft;

CFFT_F32_STRUCT ifft;

CFFT_F32_STRUCT* pifft = &ifft;

Memory leaks are a B@#$%!

Thanks for your help

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TMS320F28062: RFFT_adc_f32 doesnt work dsp library 1.5