diff -r 13bc915b657b -r c850674a3101 serialdata/ref/README
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/serialdata/ref/README	Sun Nov 01 22:16:33 2020 +0100
@@ -0,0 +1,13 @@
+Sessions of UART capture of the reference HP34970A unit.
+
+In these capture frames:
+- RX: FP -> CPU
+- TX: CPU -> FP
+
+Example extraction of data:
+
+  sigrok-cli -i startup-no-key -P uart:baudrate=187500:parity=even:rx=RX:tx=TX \
+             --channels RX,TX  -A uart=rx-data:tx-data:rx-start
+
+Start-bit: following code is a RX, so generated by the FP.
+