From 40cc58f93546e717327ae3276019470f60c87ebe Mon Sep 17 00:00:00 2001
From: zjm54321 <zhang_jia_ming@outlook.com>
Date: Mon, 9 Nov 2026 06:07:30 +0000
Subject: [PATCH] Add PID 1209:C552 for CH552 USB Foot Pedal

---
 1209/C552/index.md    | 15 +++++++++++++++
 org/zjm54321/index.md |  6 ++++++
 2 files changed, 21 insertions(+)
 create mode 100644 1209/C552/index.md
 create mode 100644 org/zjm54321/index.md

diff --git a/1209/C552/index.md b/1209/C552/index.md
new file mode 100644
index 00000000..8065a6ec
--- /dev/null
+++ b/1209/C552/index.md
@@ -0,0 +1,15 @@
+---
+layout: pid
+title: CH552 USB Foot Pedal
+owner: zjm54321
+license: GPL-3.0-or-later (firmware), CERN-OHL-S-2.0 (hardware)
+site: https://github.com/zjm54321/ch552-pedal
+source: https://github.com/zjm54321/ch552-pedal
+---
+Single-switch USB foot pedal based on the WCH CH552G (8051) microcontroller.
+It enumerates as a standard USB HID keyboard plus a VIA-compatible Raw HID
+interface (usage page 0xFF60) for browser-based remapping of plain keys and
+modifier chords; mappings persist in the chip's DataFlash. Each unit reports a
+USB serial number derived from the chip's unique ID so that multiple pedals can
+be connected and configured independently. Firmware is written in C for SDCC,
+reusing the CH55xduino USB stack; the PCB is designed in KiCad.
diff --git a/org/zjm54321/index.md b/org/zjm54321/index.md
new file mode 100644
index 00000000..1e376131
--- /dev/null
+++ b/org/zjm54321/index.md
@@ -0,0 +1,6 @@
+---
+layout: org
+title: zjm54321
+site: https://github.com/zjm54321
+---
+Individual maker building small open-source USB input devices.