hpc-2022-g3/hls/lab1/exercise_7.cpp

#define SIZE 	128
#define N 		10

void fir(int * input, int * output) {

#pragma HLS INTERFACE m_axi port=input  offset=slave  bundle=input_mem
#pragma HLS INTERFACE m_axi port=output offset=slave bundle=output_mem

#pragma HLS INTERFACE s_axilite port=return bundle=params

	int coeff[N] 	 = {13, -2, 9, 11, 26, 18, 95, -43, 6, 74};
	int shift_reg[N] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

	//TODO: insert array partition directive

	for (int n = 0; n < SIZE; n++) {
		//TODO: insert pipeline directive

		int acc = 0;

		for(int j = N-1; j > 0; j--) {
			//TODO: insert unroll directive
			shift_reg[j] = shift_reg[j-1];
		}

		shift_reg[0] = input[n];

		for (int j= 0; j< N; j++ ) {
			//TODO: insert unroll directive
			acc += shift_reg[j]*coeff[j];
		}
		output[n] = acc;
	}
}