TMS320C6678: FFTLIB Linker Command File

Part Number: TMS320C6678

Hi there,

I am trying to get one of these unit tests running from fftlib_3_1_0_0. The examples is in ti/fftlib/src/fft_omp_dp_1d_r2c_d.c. After setting up the project in the usual way for RTSC and adding the required libraries to be linked, I get the following warnings:

"configPkg/linker.cmd", line 131: warning #10068-D: no matching section
warning #10247-D: creating output section ".tdata" without a SECTIONS specification
warning #10247-D: creating output section ".tbss" without a SECTIONS specification
warning #10247-D: creating output section ".mem_ddr" without a SECTIONS specification
warning #10247-D: creating output section ".mem_l2" without a SECTIONS specification
warning #10247-D: creating output section ".mem_msm" without a SECTIONS specification
Finished building target: "fft_example.out"

Because of these warnings and because in the code there are spots where it says "#pragma DATA_SECTION(x_i, ".mem_ddr");", I amended the omp_config.cfg as:

program.sectMap[".mem_ddr"]     = new Program.SectionSpec(); // FFT specific stuff
program.sectMap[".mem_l2"]      = new Program.SectionSpec(); // FFT specific stuff
program.sectMap[".mem_msm"]     = new Program.SectionSpec(); // FFT specific stuff
program.sectMap[".mem_l2"].loadSegment      = "L2SRAM";  // FFT specific stuff
program.sectMap[".mem_ddr"].loadSegment     = "DDR3";    // FFT specific stuff
program.sectMap[".mem_msm"].loadSegment     = "MSMCSRAM";// FFT specific stuff

When I try to run theprogram on the DSP, it will yield the error for some cores:

[C66xx_1] lib_emt_init() return error! (1)

which after checking the returned value corresponds to: LIB_EMT_ERROR_RMANINIT   (-3)  /**< Failure. RMAN initialization.    */ 

The map file has some lines where it says UNINITIALIZED like

.mem_l2    0    00800000    00016000     UNINITIALIZED
                  00800000    00016000     main.obj (.mem_l2)

I do not exactly know what is wrong here. Do you maybe have some omp-config file for these unit tests? Also, what is the difference between defining these sections in a linker command file and in the omp-config file?

Thank you very much for your help.