Fix binary file reading in bin_to_coe.py

Co-authored-by: Virendra Kakade <virendra.kakade@ni.com>

firmware/usrp3/utils/bin_to_coe.py

@@ -1,18 +1,27 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
-import sys
 import binascii
+import sys
 
-if __name__ == '__main__':
-    bin_file = sys.argv[1]
-    coe_file = sys.argv[2]
+if len(sys.argv) < 2:
+    print("Usage: bin_to_coe.py <bin file> <coe file>")
+    sys.exit(1)
 
-    #parse bin file into hex lines
-    h = binascii.hexlify(open(bin_file).read()) + '0'*7
-    d = [h[i*8:(i+1)*8] for i in range(len(h)/8)]
+bin_file = sys.argv[1]
+coe_file = sys.argv[2]
 
-    #write output coe file
-    out = open(coe_file, 'w')
-    out.write('memory_initialization_radix=16;\n')
-    out.write('memory_initialization_vector=\n')
-    out.write(',\n'.join([h[i*8:(i+1)*8] for i in range(len(h)/8)]) + ';')
+# Read the binary file in binary mode
+with open(bin_file, 'rb') as f:
+    binary_data = f.read()
+    padding_length = (8 - (len(binary_data) * 2) % 8) % 8  # Calculate necessary padding
+    h = binascii.hexlify(binary_data) + b'0' * padding_length
+
+# Convert binary to hexadecimal and format for COE file
+coe_str = 'memory_initialization_radix=16;\n'
+coe_str += 'memory_initialization_vector=\n'
+coe_str += ',\n'.join(h[i:i+8].decode('ascii') for i in range(0, len(h), 8))
+coe_str += ';'
+
+# Write the COE formatted string to the output file
+with open(coe_file, 'w') as f:
+    f.write(coe_str)