mirror of
https://github.com/dptech-corp/Uni-Lab-OS.git
synced 2025-12-17 04:51:10 +00:00
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
import serial
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import time
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import struct
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import tkinter as tk
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from tkinter import ttk
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# 配置串口
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ser = serial.Serial(
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port='COM13',
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baudrate=9600,
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bytesize=serial.EIGHTBITS,
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parity=serial.PARITY_NONE,
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stopbits=serial.STOPBITS_ONE,
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timeout=1
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)
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def calculate_crc(data):
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crc = 0xFFFF
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for pos in data:
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crc ^= pos
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for i in range(8):
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if (crc & 0x0001) != 0:
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crc >>= 1
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crc ^= 0xA001
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else:
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crc >>= 1
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return crc
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def build_modbus_request(device_id, function_code, register_address, register_count):
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request = struct.pack('>BBHH', device_id, function_code, register_address, register_count)
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crc = calculate_crc(request)
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request += struct.pack('<H', crc)
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return request
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def read_modbus_response(response):
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if len(response) < 5:
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return None
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data = response[:-2]
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crc_received = struct.unpack('<H', response[-2:])[0]
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crc_calculated = calculate_crc(data)
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if crc_received == crc_calculated:
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return data[3:]
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return None
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def read_temperature():
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device_id = 0xC0 # 设备地址
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function_code = 0x04 # 读输入寄存器
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register_address = 0x0003 # 温度高位寄存器地址
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register_count = 0x0002 # 读取两个寄存器
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request = build_modbus_request(device_id, function_code, register_address, register_count)
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ser.write(request)
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response = ser.read(9) # 读取9字节的响应
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data = read_modbus_response(response)
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if data is None:
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return None
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high_value = struct.unpack('>H', data[:2])[0]
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low_value = struct.unpack('>H', data[2:])[0]
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# 组合高位和低位并计算实际温度
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raw_temperature = (high_value << 16) | low_value
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if raw_temperature & 0x8000: # 如果低位寄存器最高位为1，表示负值
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raw_temperature -= 0x10000 # 转换为正确的负数表示
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actual_temperature = raw_temperature / 10.0
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return actual_temperature
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def update_temperature_label():
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temperature = read_temperature()
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if temperature is not None:
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temperature_label.config(text=f"反应温度: {temperature:.1f} °C")
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else:
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temperature_label.config(text="Error reading temperature")
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root.after(1000, update_temperature_label) # 每秒更新一次
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# 创建主窗口
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root = tk.Tk()
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root.title("反应温度监控")
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# 创建标签来显示温度
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temperature_label = ttk.Label(root, text="反应温度: -- °C", font=("Helvetica", 20))
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temperature_label.pack(padx=20, pady=20)
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# 开始更新温度
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update_temperature_label()
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# 运行主循环
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root.mainloop()
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