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Hello all, I am implementing the adaptive lms filter routine on C5402 with CCS 2.1. I wrote my own code and simulations with this indicate that my code works fine. However, it could not work in real time for size of filter that goes beyond 200. So I tried to use the adaptive delayed lms filter dlms() routine of dsplib. I first tried to simulate its real-time behavior. But it does not work fine. The size of the delay buffer and the adaptive filter is 32. FOllowing the spru518 documentation I aligned these arrays to a 32-bit boundary in the linker file: . . PAGE 1: INT_DM_SCRATCH_PAD_DRAM: origin = 060h, length = 20h INT_DM_1: origin = 0080h, length = 1000h INT_DM_2: origin = 1080h, length = 380h EXT_DM_RAM: origin = 1400h, length = 0ec00h . . .dbuffer: {} > INT_DM_1 PAGE 1, align(32) . . .coefs : {} > EXT_DM_RAM PAGE 1, align(32) then in the header file i declare #define M 32 //size of filter and delay buffer #define MU 164 DATA x, e; #pragma DATA_SECTION (y,".dbuffer") DATA y[M]; DATA *dp = y; #pragma DATA_SECTION (c,".coefs") DATA c[M],r; the main routine is x = filter_response; e = desired_response; dlms(&x,c,&r,&dp,&e,MU,M,1); I used dlms() on a sample by sample basis so sizes of x, r, and e are 1. Anyone knows whats wrong with this implementation? thanks, marlo |
Using dlms routine of dsplib
Started by ●March 18, 2002
