diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..369abae
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.root
+*.mp7
diff --git a/test/hgcal_tpg_ntup_patgen.py b/test/hgcal_tpg_ntup_patgen.py
new file mode 100644
index 0000000..8b36661
--- /dev/null
+++ b/test/hgcal_tpg_ntup_patgen.py
@@ -0,0 +1,81 @@
+import ROOT
+import sys
+import random
+import numpy as np
+
+nBoards = 48
+nLinks = 72
+nFrames = 38
+
+def init_mp7_dataspace():
+  mp7data = np.zeros((nBoards, nLinks, nFrames), dtype=np.uint32)
+  return mp7data
+
+def get_mp7_data_coord(tcid):
+  board = random.randint(0, nBoards-1)
+  link = random.randint(0, nLinks-1)
+  frame = random.randint(0, nFrames-1)
+  byt = random.randint(0,3)
+  return board, link, frame, byt
+
+# initialize MP7 data space
+
+mp7data = init_mp7_dataspace()
+
+# TODO: load MP7 data space coordinate mappings
+
+# load the input file
+
+if len(sys.argv) < 3:
+  print 'Usage:', sys.argv[0], '<in_ntup_rootfile> <out_filename_prefix>'
+  sys.exit(2)
+
+infn = sys.argv[1]
+outpfx = sys.argv[2]
+
+f = ROOT.TFile(infn)
+t = f.Get('hgcalTriggerNtuplizer/HGCalTriggerNtuple')
+
+# loop thru events
+
+for k in xrange(t.GetEntries()):
+  t.GetEntry(k)
+
+  # Loop all trigger cells
+  for i in xrange(t.tc_n):
+    boardNo, linkNo, frameNo, byteNo = get_mp7_data_coord(t.tc_id[i])
+    x = mp7data[boardNo][linkNo][frameNo]
+    x = np.bitwise_and(x, np.bitwise_not(np.left_shift(np.uint32(0xff),
+                                         8*byteNo)))
+    x = np.bitwise_or(x, np.left_shift(
+                           np.bitwise_and(np.uint32(0xff),
+                                          np.uint32(t.tc_compressedCharge[i])),
+                           8*byteNo))
+    mp7data[boardNo][linkNo][frameNo] = x
+    #print 'Uncomp =', hex(t.tc_compressedCharge[i]), ', byteNo = ', byteNo, ',  x =', hex(x)
+
+  # produce mp7 output pattern text files
+
+  for b in xrange(nBoards):
+    outfn = outpfx + '_r' + str(t.run) + '_e' + str(t.event) + '_b' \
+                   + '%02d'%b + '.mp7'
+    of = open(outfn, 'w')
+    of.write('Board MP7\n')
+    qcline = 'Quad/Chan :'
+    for i in xrange(nLinks):
+        qcstr = '    q' + '%02d'%(i/4) + 'c' + str(i%4) + '  '
+        qcline += qcstr
+    of.write(qcline + '\n')
+    linkline = 'Link      :'
+    for i in xrange(nLinks):
+      linkline += '     ' + '%2d'%i + '    '
+    of.write(linkline + '\n')
+    for i in xrange(nFrames):
+      fline = 'Frame  %2d :' % i
+      for j in xrange(nLinks):
+        fline += ' 1v' + ('%08x' % mp7data[b][j][i])
+      of.write(fline + '\n')
+    of.close()
+
+f.Close()
+