style(HDMI-Tool): 串口下拉贯通卡片宽度; 参数行补全 8-N-1(板卡固件固定标注)

HDMI-Tool/src/app_gui.py

@@ -272,11 +272,11 @@ class App(ctk.CTk):
         row1 = ctk.CTkFrame(c, fg_color='transparent')
         row1.pack(fill='x')
         self._dlpc_ports = dlpc_rs485.DLPC485.list_ports_info()
-        self.cbo_dlpc = ctk.CTkComboBox(row1, width=250, state='readonly',
+        self.cbo_dlpc = ctk.CTkComboBox(row1, state='readonly',
                                         values=[lb for _d, lb in self._dlpc_ports])
         if config.SERIAL_CFG['port']:
             self._dlpc_pick(config.SERIAL_CFG['port'])
-        self.cbo_dlpc.pack(side='left')
+        self.cbo_dlpc.pack(side='left', fill='x', expand=True)
         ctk.CTkButton(row1, text='刷新', width=64,
                       command=self._dlpc_refresh).pack(side='left', padx=(6, 0))
         self.btn_dlpc = ctk.CTkButton(row1, text='连接', width=72,
@@ -289,6 +289,8 @@ class App(ctk.CTk):
                                         values=('115200', '57600', '38400', '9600'))
         self.cbo_baud.set(str(config.SERIAL_CFG['baud']))
         self.cbo_baud.pack(side='left', padx=6)
+        ctk.CTkLabel(row2, text='数据位 8 · 校验 N · 停止位 1（板卡固件固定）',
+                     text_color='gray50').pack(side='left', padx=(0, 6))
         self.lbl_dlpc_st = ctk.CTkLabel(row2, text='未连接', text_color='gray60')
         self.lbl_dlpc_st.pack(side='left', padx=6)