FIR filter get wrong result?

[xyoungli]

I have followed the FIR example,
initialized as follow:
ne10_fir_instance_f32_t cfg;
ne10_float32_t st[NUMTAPS + BLOCKSIZE - 1];

if (ne10_fir_init_float(&cfg, NUMTAPS, mtaps, st, BLOCKSIZE) != NE10_OK)

and do the FIR
ne10_fir_float_c(&cfg, xin+bBLOCKSIZE, yout+bBLOCKSIZE, BLOCKSIZE);

but i got wrong result, and the value of coef "mtaps" is changed,
could anybody tell me what would be wrong? thanks