Update cordic code to include testbench

examples/Makefile

@@ -1,3 +1,4 @@
+VHLS = $(shell vivado_hls -r)
 EXAMPLES = $(shell ls *-top.c)
 EXAMPLES_CPP = $(shell ls *-top.cpp)
 EXAMPLES_BIN = $(patsubst %.c,%,$(EXAMPLES))
@@ -28,10 +29,10 @@ video_2dfilter_linebuffer_extended_constant-top.log: video_2dfilter_linebuffer_e
 	./$< $(INPUTFILE) video_2dfilter_linebuffer_extended_constant.bmp > $@
 
 %-top.bin: %-top.c %.c bitmap.c
-	gcc -std=c99 $? -g -o $@
+	gcc -I$(VHLS)/include -std=c99 $? -g -o $@
 
 %-top.bin: %-top.cpp %.cpp
-	g++ $? -g -o $@
+	g++ -I$(VHLS)/include $? -g -o $@
 
  #: %-top.bin
 %.tcl:

examples/cordic-top.c

@@ -0,0 +1,71 @@
+/*
+This is traditional CORDIC computation of sine and cosine.
+The current code is based on [FXT: cordic-circ-demo.cc]
+Correctly calculates cos and sine between 0-90 degrees (0-100).
+
+INPUT:
+	double theta: Input angle 
+	long n: Number of iterations. 
+OUTPUT:
+	double &s: Reference to the sine part
+	double &c: Reference to the cos part 
+
+	error_sin= [abs(s-zs)/zs]*100;
+	error_cos= [abs(c-zc)/zc]*100;
+	Total_Error_Sin = sum(error_sin)
+	Total_error_Cos = sum(error_cos)
+
+*/
+#include <math.h>
+#include"cordic.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+using namespace std;
+//#define M_PI 3.1415926536897932384626
+
+double abs_double(double var){
+	if ( var < 0)
+	var = -var;
+	return var;
+
+
+}
+int main(int argc, char **argv)
+{	
+
+
+    FILE *fp;
+
+	UINTYPE_12 n = 32;
+	cos_sin_TYPE s;			//sine
+	cos_sin_TYPE c;			//cos
+	theta_TYPE radian; 		//radian versuin of degree
+
+	//zs=sin, zc=cos using math.h in VivadoHLS
+	double zs, zc; 			// sine and cos values calculated from math.
+
+	//Error checking
+	double Total_Error_Sin=0.0;
+	double Total_error_Cos=0.0;
+	double error_sin=0.0, error_cos=0.0;
+
+	fp=fopen("out.dat","w");
+	for(int i=1;i<NUM_DEGREE;i++) {
+			radian = i*M_PI/180;
+			cordic(radian, s, c, n);
+			zs= sin((double)radian);
+			zc = cos((double)radian);
+			error_sin=(abs_double((double)s-zs)/zs)*100.0;
+			error_cos=(abs_double((double)c-zc)/zc)*100.0;
+			Total_Error_Sin=Total_Error_Sin+error_sin;
+			Total_error_Cos=Total_error_Cos+error_cos;
+
+			fprintf(fp, "degree=%d, radian=%f, cos=%f, sin=%f\n", i, (double)radian, (double)c, (double)s);
+	}
+
+	fclose(fp);
+
+	printf ("Total_Error_Sin=%f, Total_error_Cos=%f, \n", Total_Error_Sin, Total_error_Cos);
+	return 0;
+}

examples/cordic.h

@@ -0,0 +1,14 @@
+
+#ifndef CORDIC_H
+#define CORDIC_H
+#include "ap_fixed.h"
+
+typedef unsigned int UINTYPE_12;
+typedef ap_fixed<12,2> THETA_TYPE;
+typedef ap_fixed<12,2> COS_SIN_TYPE;
+
+const int NUM_DEGREE=90;
+static THETA_TYPE cordic_ctab[64]={0.78539816339744828000,0.46364760900080609000,0.24497866312686414000,0.12435499454676144000,0.06241880999595735000,0.03123983343026827700,0.01562372862047683100,0.00781234106010111110,0.00390623013196697180,0.00195312251647881880,0.00097656218955931946,0.00048828121119489829,0.00024414062014936177,0.00012207031189367021,0.00006103515617420877,0.00003051757811552610,0.00001525878906131576,0.00000762939453110197,0.00000381469726560650,0.00000190734863281019,0.00000095367431640596,0.00000047683715820309,0.00000023841857910156,0.00000011920928955078,0.00000005960464477539,0.00000002980232238770,0.00000001490116119385,0.00000000745058059692,0.00000000372529029846,0.00000000186264514923,0.00000000093132257462,0.00000000046566128731,0.00000000023283064365,0.00000000011641532183,0.00000000005820766091,0.00000000002910383046,0.00000000001455191523,0.00000000000727595761,0.00000000000363797881,0.00000000000181898940,0.00000000000090949470,0.00000000000045474735,0.00000000000022737368,0.00000000000011368684,0.00000000000005684342,0.00000000000002842171,0.00000000000001421085,0.00000000000000710543,0.00000000000000355271,0.00000000000000177636,0.00000000000000088818,0.00000000000000044409,0.00000000000000022204,0.00000000000000011102,0.00000000000000005551,0.00000000000000002776,0.00000000000000001388,0.00000000000000000694,0.00000000000000000347,0.00000000000000000173,0.00000000000000000087,0.00000000000000000043,0.00000000000000000022,0.00000000000000000011};
+
+void cordic(THETA_TYPE theta, COS_SIN_TYPE &s, COS_SIN_TYPE &c)
+#endif

examples/cordic.tcl

@@ -0,0 +1,17 @@
+############################################################
+## This file is generated automatically by Vivado HLS.
+## Please DO NOT edit it.
+## Copyright (C) 2012 Xilinx Inc. All rights reserved.
+############################################################
+open_project hls_cordic
+set_top cordic_circ
+add_files cordic.h
+add_files cordic.cpp
+add_files -tb out.gold.dat
+add_files -tb cordic_test.cpp
+open_solution "solution1"
+set_part  {xc7z020clg484-1}
+create_clock -period 10
+
+source "./directives.tcl"
+csynth_design