Report sample rate after measurement

1 files changed, 8 insertions, 2 deletions

diff --git a/bin/korad-logger b/bin/korad-logger
index d73cff0..2b540a0 100755
--- a/bin/korad-logger
+++ b/bin/korad-logger
@@ -270,8 +270,6 @@ def measure_data(
     signal.signal(signal.SIGQUIT, graceful_exit)
     korad = KA320(port, channel)
 
-    start_ts = time.time()
-
     if filename is not None:
         output_handle = open(filename, "w+")
     else:
@@ -307,6 +305,8 @@ def measure_data(
     else:
         print(f"Starting data acquisition. Press Ctrl+C to stop.")
 
+    start_ts = time.time()
+
     print("# Device: " + korad.get_id(), file=output_handle)
     print("# Timestamp Voltage Current", file=output_handle)
     while not terminate_measurement:
@@ -352,6 +352,12 @@ def measure_data(
     output = output_handle.read()
     output_handle.close()
 
+    # exclude header
+    output_len = len(output.splitlines()) - 2
+    print(
+        f"Logged {output_len:d} samples in {ts - start_ts:.0f} seconds (mean sample rate: {output_len / (ts - start_ts) :.1f} Hz)"
+    )
+
     return output