From 0df4b801a34697f2058b4a7b95e08d2a0576c9db Mon Sep 17 00:00:00 2001
From: Ben Hilburn <ben.hilburn@ettus.com>
Date: Thu, 10 Oct 2013 10:17:27 -0700
Subject: Squashed B200 FPGA Source. Code from Josh Blum, Ian Buckley, and Matt
 Ettus.

---
 fpga/usrp3/lib/vita/generate_bits.cpp | 87 +++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 fpga/usrp3/lib/vita/generate_bits.cpp

(limited to 'fpga/usrp3/lib/vita/generate_bits.cpp')

diff --git a/fpga/usrp3/lib/vita/generate_bits.cpp b/fpga/usrp3/lib/vita/generate_bits.cpp
new file mode 100644
index 000000000..f5ea60fc1
--- /dev/null
+++ b/fpga/usrp3/lib/vita/generate_bits.cpp
@@ -0,0 +1,87 @@
+//PURPOSE: C test bench for floating point converter IQ_to_FLOAT
+
+#include <cstdlib>
+#include <iostream>
+#include <stdio.h>
+#include <stdlib.h>
+#include <bitset>
+#include <cmath>
+#include "math.h"
+#include <iomanip>
+
+using namespace std;
+//INITIAL TESTING PURPOSES: Use if you want to print individual bits	
+	template <typename T>
+
+	void print_bits(T n) {
+		T mask = 1 << (sizeof(T)*8-1);
+		while (mask) {
+			cout << ((mask & n) ? "1" : "0");
+			mask >>= 1;
+		}
+	cout << endl;
+	}
+
+	int main()	{
+		
+
+		FILE *convFile;
+		FILE *newFile;
+
+
+		
+		
+
+
+		convFile = fopen("iq_to_float_input.txt", "w");
+		newFile =  fopen("iq_to_float_output.txt", "w");
+        //iterate through test cases
+    
+        for (signed int i = -0x8000; i <= 0x7FFF; i++)   {
+
+		float end = float(i*exp2(-15));
+        
+
+		unsigned int n = *(reinterpret_cast<unsigned int*>(&end));
+
+        //IN CASE YOU NEED TO LOOK AT SPECIFIC EXPONENT, FRAC, ETC VALUES
+        //ACTIVATE BY UNCOMMENTING
+        /*
+
+		unsigned int signed_bit = n>>31;
+		
+		unsigned int exp =  ((n>>23) &0xFF);
+		
+		unsigned int frac =  (n &0x7FFFFF);
+
+		cout << "end: " << end << endl;
+		cout << "n: " << hex << n << endl;
+
+
+
+		cout << "signed bit:" << hex << signed_bit << endl;
+		cout << "exp: " << hex <<  exp << endl;
+		cout << "fract: " << hex << frac << endl;
+
+		float f = *(float*)&n;
+		cout << "f" << f << endl;
+*/		
+		
+	//	print_bits<unsigned short>(start);
+	//	print_bits<unsigned int>(n);
+	    unsigned int something = i;
+        something &= 0xFFFF;
+
+		fprintf(convFile, "%x\n",something);
+		fprintf(newFile, "%x\n",n);
+        }
+
+	fclose(convFile);
+	fclose(newFile);
+
+
+	return 0;
+} 
+	 
+
+	
-- 
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