usb: Add capture for serial-over-HID with CP2110 to UT612 (ES51919)

2 files changed, 25 insertions, 0 deletions

diff --git a/usb/hid/serial/README b/usb/hid/serial/README
new file mode 100644
index 0000000..cdfcd1d
--- /dev/null
+++ b/usb/hid/serial/README
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+-------------------------------------------------------------------------------
+SiLabs CP2110 serial-over-HID, UT612 LCR meter
+-------------------------------------------------------------------------------
+
+This is a capture of UART-over-HID communication to a UNI-T UT612 LCR meter
+which contains the SiLabs CP2110 HID chip and the ES51919 LCR meter chip.
+UART communication uses 9600/8n1, USB HID runs at full speed (USB1.1 12MHz).
+
+The LCR meter actually exclusively transmits data to the PC's RX line. The
+PC's TX traffic is just a development hack in preparation of bidirectional
+communication where cables support it.
+
+
+Logic analyzer setup
+--------------------
+
+The Asix Sigma analyzer was set to 50MHz samplerate. Capture length is 200M
+samples, which translates to four seconds duration.
+
+  Probe       CP2110 signals
+  --------------------------
+  1           USB D+
+  2           USB D-
+  3           UART TX (sigrok to meter)
+  4           UART RX (meter to sigrok)
diff --git a/usb/hid/serial/cp2110_serial_over_hid_ut612.sr b/usb/hid/serial/cp2110_serial_over_hid_ut612.sr
new file mode 100644
index 0000000..833432a
--- /dev/null
+++ b/usb/hid/serial/cp2110_serial_over_hid_ut612.sr