Merge branch 'develop'

hlsclt/_version.py

@@ -1 +1 @@
-__version__ = '1.0.0.a2'
+__version__ = '1.0.0.a3'

hlsclt/examples/sin_taylor_series/hls_config.py

@@ -0,0 +1,8 @@
+# Config file for Sine Taylor Series HLS Project
+
+top_level_function_name = "sin_taylor_series"
+src_files = ["dut.h","dut.cpp"]
+tb_files = ["testbench.cpp"]
+part_name = "xc7z020clg484-1"
+clock_period = "4"
+language = "vhdl"

hlsclt/examples/sin_taylor_series/src/dut.cpp

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+double fact(int x) {
+	// Comment out the pragma below this line to revert to 'partially optimised'.
+	#pragma HLS inline off
+	double result_int = 1.0;
+	fact_loop: for (int i=1; i<=x; i++) {
+		#pragma HLS PIPELINE
+		result_int=result_int*i;
+	}
+	return result_int;
+}
+
+double power (double x, int y) {
+	// Comment out the pragma below this line to revert to 'partially optimised'.
+	#pragma HLS INLINE OFF
+	double result_int = 1.0;
+	power_loop: for (int i=1; i<=y; i++) {
+		#pragma HLS PIPELINE
+		result_int=result_int*x;
+	}
+	return result_int;
+}
+
+double sin_taylor_series (double x){
+
+	#pragma HLS DATAFLOW
+
+	int n = 20;
+	double sum_positive = 0.0;
+	double sum_negative= 0.0;
+
+	sum_loop: for (int i=1; i<=n; i+=4) {
+		sum_positive = sum_positive + (power (x,i) / fact (i));
+		sum_negative = sum_negative + (power (x,i+2) / fact (i+2));
+	}
+
+	return (sum_positive - sum_negative);
+}

hlsclt/examples/sin_taylor_series/src/dut.h

@@ -0,0 +1 @@
+double sin_taylor_series (double x);

hlsclt/examples/sin_taylor_series/tb/testbench.cpp

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+#include <fstream>
+#include <math.h>
+#include "../src/dut.h"
+
+int main(void) {
+
+	// Setup some required variables
+	const double pi = 3.1415;
+	const double rad2deg = 180/pi;
+	const double deg2rad = pi/180;
+	double x = 0.0;
+	double result, expected_result;
+	int error_count = 0;
+
+	// Test Loop
+	while (x < 90*deg2rad) {
+		// Call dut
+		result = sin_taylor_series(x);
+		// Generate expected_result
+		expected_result = sin(x);
+		// Check result and output some visual check
+		if (fabs(result - expected_result) > expected_result*0.001) {
+			error_count++;
+		}
+		printf("Sin(%d) - Expected result: %f, Got Result: %f\n", int(round(x*rad2deg)), expected_result, result);
+		x = x + (5*deg2rad);
+	}
+
+	return error_count;
+
+}