refactor: Modbus 默认波特率 115200 + 资源分析重评估
分析结论 (115200 vs 9600): - TX 阻塞: 4.3ms (曾 44.8ms) → 活动态 CPU 仅 +2.9% - 主循环延迟 < 半个测量窗, 不影响线圈检测/光耦/BLE - 从"临界可用"变为"完全充裕" 固件修复: - rs485_init: 硬编码 RS485_BAUD → 使用 g_storage_uart_baud (flash 可配) - 协议文档: Modbus 默认 115200 - DLD154Tool: 串口默认 115200
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@@ -148,7 +148,7 @@ class SerialTab(QWidget):
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self._cmb_baud = QComboBox()
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self._cmb_baud.addItems(["9600", "19200", "38400", "57600", "115200"])
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self._cmb_baud.setCurrentText("9600")
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self._cmb_baud.setCurrentText("115200")
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fl.addRow("波特率:", self._cmb_baud)
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self._spn_addr = QSpinBox()
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