DSPLib Rfft Example Project

Jack Bolton

Other Parts Discussed in Thread: TMS320C5505

Hi all,

I have been trying to code an audio noise reduction routine using DSPLib 2.4 on the eZDSP TMS320C5505 stick, however I came across some problems using the rfft and rifft functions, as they did not behave as I expected them to.

I then went right back to basics to try and understand how they function and how I should be using them, and I tried to compile and run the example rfft code found in the example folder in the DSPLib folder. However I cannot get this to run either! The code seems to hang somewhere inside the rfft function, probably within one of the .asm it uses.

I am new to CSS, so it could be I am doing something very stupid here, and I have now spend almost a whole day trying to make something work that I feel should be trivial. I was wondering if anyone could possibly create and put up a project file for the rfft example that runs on their c5505 stick, so I can try and see where I am going wrong?

I believe I am using a v3.3 silicon, and have rebuilt the DSPLib for that (Although that could be wrong as well...). I can put up what I have done if anyone wants it.

Thanks,

over 14 years ago

0 Jack Bolton over 14 years ago

Prodigy 130 points

Update 1:

I seem to be able to get add() working as it compiles, runs, and doesnt hang within add.asm, however I still cannot get rfft() working. I also tried cfft() which also hangs.

Could anyone point out anything obviously wrong in the steps I am taking to try and use the DSPlib.

DSPlib folder is on desktop, along with project folder, workspace is in my documents.

1 - Rebuild library for 3.3 CPU using altered .bat file as shown below

     REM this file is for building DSPLIB in huge memory module on C5505/15
     REM call c:\ti\dosrun.bat
     set CGT_BIN=C:/Program Files/Texas Instruments/ccsv4/tools/compiler/C5500/bin
     set PATH=%PATH%;%CGT_BIN%

     REM Equivalent OPTIONS for C5505/15, huge memory model:
     REM set OPTIONS= -g -vcpu:3.3 --memory_model=huge --ptrdiff_size=32
     REM set OPTIONS= -g -v5515 --memory_model=huge --ptrdiff_size=32
     REM set OPTIONS= -g -v5505 --memory_model=huge --ptrdiff_size=32
     REM set DSPLIB=55xdsph
     REM Equivalent OPTIONS for C5505/15, large memory model:
     set OPTIONS= -g -vcpu:3.3 --memory_model=large
     set OPTIONS= -g -v5515 --memory_model=large
     set OPTIONS= -g -v5505 --memory_model=large
     set OPTIONS= -g -v5505 -ml
     set DSPLIB=55xdspx

     set SRC=55x_src
     set FILES= *.asm
     set EXT=asm
     REM built library in SRC dir and then copy to root
     del %DSPLIB%.src
     del %DSPLIB%.lib
     cd %SRC%
     del *.obj
     cl55 %OPTIONS% %FILES%
     ar55 -r %DSPLIB%.src *.%EXT% ..\include\*.h
     ar55 -r %DSPLIB%.lib *.obj
     copy %DSPLIB%.src ..
     copy %DSPLIB%.lib ..
     del *.src
     del *.lib
     dir *.obj >> ..\junk.txt
     del *.obj
     cd ..

2 - Linking 55xdspx.lib to project.

3 - Including tms320.h dsplib.h math.h and stdio.h in project, and adding #include in main for these

4 - Setting the compiler run time model option to "large memory model" and using rts55x.lib for the linker library.

5 - Altering c5505.cmd to put .fftcode and .twiddle in SARAM as shown below

     MEMORY
     {
         MMR     (RW) : origin = 0000000h length = 0000c0h /* MMRs */
         DARAM (RW)    : origin = 00000c0h length = 00ff40h /* on-chip DARAM */
         SARAM   (RW) : origin = 0030000h length = 01e000h /* on-chip SARAM */

        SAROM_0 (RX) : origin = 0fe0000h length = 008000h     /* on-chip ROM 0 */
         SAROM_1 (RX) : origin = 0fe8000h length = 008000h     /* on-chip ROM 1 */
         SAROM_2 (RX) : origin = 0ff0000h length = 008000h     /* on-chip ROM 2 */
         SAROM_3 (RX) : origin = 0ff8000h length = 008000h     /* on-chip ROM 3 */

         EMIF_CS0 (RW) : origin = 0050000h length = 07B0000h   /* mSDR */
         EMIF_CS2 (RW) : origin = 0800000h length = 0400000h   /* ASYNC1 : NAND */
         EMIF_CS3 (RW) : origin = 0C00000h length = 0200000h   /* ASYNC2 : NAND */
         EMIF_CS4 (RW) : origin = 0E00000h length = 0100000h   /* ASYNC3 : NOR */
         EMIF_CS5 (RW) : origin = 0F00000h length = 00E0000h   /* ASYNC4 : SRAM */
     }

     SECTIONS
     {
         vectors (NOLOAD)
         .bss        : > DARAM /*, fill = 0 */
         vector      : > DARAM      ALIGN = 256
         .stack      : > DARAM
         .sysstack   : > DARAM
         .sysmem     : > DARAM
         .text       : > SARAM
         .data       : > DARAM
         .cinit         : > DARAM
         .const         : > DARAM
         .cio        : > DARAM
         .usect       : > DARAM
         .switch     : > DARAM
         .emif_cs0   : > EMIF_CS0
         .emif_cs2   : > EMIF_CS2
         .emif_cs3   : > EMIF_CS3
         .emif_cs4   : > EMIF_CS4
       .emif_cs5   : > EMIF_CS5

         .fftcode : > SARAM        /* FFT-specific sections, taken from RFFT example project cmd file */
         .twiddle : > SARAM, align(2048)

}

I am really stuck right now, hopefully it's something simple I'm doig wrong.

Thanks,

Processors

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DSPLib Rfft Example Project