Add focussing_app function (focus_app.py) to standardize end-user applications, Rewrite focussing applications

focus_seq_FLI.py

@@ -0,0 +1,60 @@
+#!/usr/bin/python
+
+#
+#   Get sequence of focussing images and
+#   compute the best focus value
+#
+#   This variant of the script uses Eddy Emelianov's
+#   'fli_control' executable
+#
+
+
+from OBSUTILS import focussing_app
+import sys
+import argparse as ap
+import subprocess as sp
+import numpy as np
+import pathlib as pl
+
+
+# --- FLI-hardware related (ROBOTEL variant)
+
+
+def set_focus(foc_val):
+    cmd = ["fli_control", "-g", str(int(foc_val))]
+    ret = sp.run(cmd, stdout=sp.PIPE, stderr=sp.PIPE)
+    return ret.returncode
+
+
+def get_image(filename, exp_time):
+    #
+    # Eddy's 'fli_control' related stub:
+    #     filename is expected in form 'rootname_DDDD.ext'
+    #     convert it to 'rootname'
+    #
+
+    fname = str(filename).split("_")
+    fname = fname[0]
+
+    cmd = [
+        "fli_control",
+        "-r",
+        "/tmp/10micron.fitsheader",
+        "-x",
+        "{:d}".format(np.round(exp_time * 1000)),  # to microseconds
+        fname,
+    ]
+
+    ret = sp.run(cmd, stdout=sp.PIPE, stderr=sp.PIPE)
+    return ret.returncode
+
+
+if __name__ == "__main__":
+    parser = ap.ArgumentParser(
+        prog="{}".format(pl.Path(sys.argv[0]).name),
+        description="FLI CCD and focuser hardware: focussing sequence implementation. It is assumed that 'fli_control' software is installed in the OS.",
+    )
+
+    ret = focussing_app(parser, set_focus, get_image)
+
+    sys.exit(ret)