ADSP-BF533的例程源码29：FIR信号处理源码

/******************************************************** * * 【OpenADSP开源社区官网】 * http://www.openadsp.com * * 【OpenADSP开源社区论坛】 * http://www.openadsp.cn/ * * 【OpenADSP开源社区官网淘宝店】 https://shop108086345.taobao.com/ * ********************************************************/ /* fir.c * * Example of the FIR routine from the Blackfin DSP library. * * The default input data file is a sum of two sinusoids * The default coefficients implement a LPF that filters out one of the sine terms * * See the documentation for more info on the DSP routines * * Load the workspace found in file "fir_533.vdw" or "fir_535.vdw" to see the input and output * of this FIR test. */ #include <fract.h> #include <filter.h> #define VEC_SIZE 256 // length of the input vector #define NUM_TAPS 8 // number of filter coefficients fract16 in[VEC_SIZE] = { #include "in.dat" }; fract16 coefs[NUM_TAPS] = { #include "coefs.dat" }; fract16 delay[NUM_TAPS]; fract16 out[VEC_SIZE + NUM_TAPS - 1]; fir_state_fr16 state; // declare filter state int main() { fir_init(state, coefs, delay, NUM_TAPS, 1); // initialize filter state fir_fr16(in, out, VEC_SIZE, &state); // apply the filter to the data }