lkarsten · July 9, 2017 12:09 · Jul 9, 2017
diff --git a/splitax.py b/splitax.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+"""
+Split Airmar .ax files consisting of multiple SREC blocks into separate files,
+so srec_cat/objcopy can read them.
+
+Author: Lasse Karstensen <[email protected]>, July 2017.
+"""
+from sys import argv
+from os.path import basename
+
+def split_ax(inputfile):
+    data = open(inputfile).readlines()
+    idx = []
+    start = 0
+    for i in range(0, len(data)):
+        if data[i].startswith("S9"):
+            idx.append((start, i+1))
+            start = i+1
+
+    if len(idx) == 0:
+        print("ERROR: File %s has no SREC start marker. Incorrect file type?" % inputfile)
+        return
+    else:
+        print("File %s has %i sections." % (inputfile, len(idx)))
+
+    for i, ptr in enumerate(idx):
+        start, end = ptr
+        filename = "%s__part%i.srec" % (basename(inputfile).replace(".ax", ""), i)
+        with open(filename, "w") as fp:
+            for line in data[start:end]:
+                fp.write(line)
+        print("Wrote %s" % filename)
+
+if __name__ == "__main__":
+    if len(argv) == 1:
+        print("Usage: %s inputfile.ax <inputfile2.ax> <inputfileN.ax..>" % argv[0])
+        exit(1)
+
+    for inputfile in argv[1:]:
+        split_ax(inputfile)
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