update @ 2026/01/29

1. a simple vibe coding COM port GUI ( python , MFC )

2. GUI tool location :

MFC

\native_mfc\build\cmake\Release\simple_com_chart_gui_mfc.exe

\native_mfc\build\vs\Release\simple_com_chart_gui_mfc.exe

PYTHON

\main.pyw

3. function

   • COM port baud rate adjust

   • button Overlay :

   Toggles whether channels are drawn as an overlay;

   updates the plot immediately (or just redraws the overlay when in Snapshot mode).

   • button Snapshot :

   Freezes/unfreezes live plotting;

   when ON the plot stops updating, when OFF it resumes live data and refreshes the view.

   • button Fit :

   Auto-fits the view to the currently enabled channels.

   • button Refresh :

   Clears current samples and resets the plot display;

   updates the status counts (does not disconnect).

4. MFC GUI support data format :

MFC GUI display ,

5. Python GUI support data format :

Python GUI display ,

Simple COM Chart GUI

Purpose

This tool visualizes real-time MCU log data via UART / COM port. The MCU firmware must output logs in a specific text format for this tool to correctly decode and plot channel values.

---

Supported Log Format

Each log line must be a single line, ending with newline (\r\n).

Basic format

key:value,key:value,...

Example:

state:5,CHG:4179mv,T1:2296mv,T2:1589mv,Q6:2111mv,Q2/Q3:21mv

Rules

• Fields are separated by comma ,
• Key and value are separated by colon :
• Units are optional but recommended (e.g. mv)
• Spaces are ignored
• Order of fields does not matter
• Unknown keys are ignored

---

Reserved Keys (Example)

Key	Description
state	System state (integer)
CHG	Charger voltage (mV)
T1	Battery voltage T1 (mV)
T2	Battery voltage T2 (mV)
Q6	MOSFET Q6 voltage (mV)
Q2/Q3	Sense voltage (mV)

---

MCU Firmware Example (C)

printf(
    "state:%d,CHG:%dmv,T1:%dmv,T2:%dmv,Q6:%dmv,Q2/Q3:%dmv\r\n",
    state, chg_mv, t1_mv, t2_mv, q6_mv, q23_mv
);