From dc1650953976a643f8048898073b1980a3bb08d0 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Wed, 25 Sep 2019 15:02:40 +0200
Subject: [PATCH] Simple script to convert pm3 traces to something audible,
 thanks @rfidiot for the idea

---
 tools/pm3_pm32wav.py | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 tools/pm3_pm32wav.py

diff --git a/tools/pm3_pm32wav.py b/tools/pm3_pm32wav.py
new file mode 100755
index 000000000..75c94dc4c
--- /dev/null
+++ b/tools/pm3_pm32wav.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+
+# Simple script to convert pm3 traces to something audible
+sampleRate = 16000.0 # hertz, so we're scaling the 125kHz to 16kHz
+default_repeat = 10
+
+import sys
+import numpy as np
+import wave
+import struct
+
+with open(sys.argv[1]) as pm3:
+  data = np.fromfile(pm3, dtype=int, sep="\n")
+
+if len(sys.argv) > 2:
+  repeat = int(sys.argv[2], 10)
+else:
+  repeat = default_repeat
+
+ofile = sys.argv[1].replace('pm3', 'wav')
+if ofile == sys.argv[1]:
+    ofile = sys.argv[1]+'.wav'
+obj = wave.open(ofile,'w')
+obj.setnchannels(1) # mono
+obj.setsampwidth(2)
+obj.setframerate(sampleRate)
+factor = (2**16)//512
+for i in range(repeat):
+   for d in data:
+       try:
+           obj.writeframesraw( struct.pack('<h', d*factor) )
+       except:
+           print("B:" , d, d*factor)
+           raise
+obj.close()