mirror of
https://github.com/dptech-corp/Uni-Lab-OS.git
synced 2025-12-17 13:01:12 +00:00
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
import serial
|
||
import time
|
||
import struct
|
||
import tkinter as tk
|
||
from tkinter import ttk
|
||
|
||
# 配置串口
|
||
ser = serial.Serial(
|
||
port='COM13',
|
||
baudrate=9600,
|
||
bytesize=serial.EIGHTBITS,
|
||
parity=serial.PARITY_NONE,
|
||
stopbits=serial.STOPBITS_ONE,
|
||
timeout=1
|
||
)
|
||
|
||
def calculate_crc(data):
|
||
crc = 0xFFFF
|
||
for pos in data:
|
||
crc ^= pos
|
||
for i in range(8):
|
||
if (crc & 0x0001) != 0:
|
||
crc >>= 1
|
||
crc ^= 0xA001
|
||
else:
|
||
crc >>= 1
|
||
return crc
|
||
|
||
def build_modbus_request(device_id, function_code, register_address, register_count):
|
||
request = struct.pack('>BBHH', device_id, function_code, register_address, register_count)
|
||
crc = calculate_crc(request)
|
||
request += struct.pack('<H', crc)
|
||
return request
|
||
|
||
def read_modbus_response(response):
|
||
if len(response) < 5:
|
||
return None
|
||
data = response[:-2]
|
||
crc_received = struct.unpack('<H', response[-2:])[0]
|
||
crc_calculated = calculate_crc(data)
|
||
if crc_received == crc_calculated:
|
||
return data[3:]
|
||
return None
|
||
|
||
def read_temperature():
|
||
device_id = 0xC0 # 设备地址
|
||
function_code = 0x04 # 读输入寄存器
|
||
register_address = 0x0003 # 温度高位寄存器地址
|
||
register_count = 0x0002 # 读取两个寄存器
|
||
|
||
request = build_modbus_request(device_id, function_code, register_address, register_count)
|
||
ser.write(request)
|
||
response = ser.read(9) # 读取9字节的响应
|
||
|
||
data = read_modbus_response(response)
|
||
if data is None:
|
||
return None
|
||
|
||
high_value = struct.unpack('>H', data[:2])[0]
|
||
low_value = struct.unpack('>H', data[2:])[0]
|
||
|
||
# 组合高位和低位并计算实际温度
|
||
raw_temperature = (high_value << 16) | low_value
|
||
if raw_temperature & 0x8000: # 如果低位寄存器最高位为1，表示负值
|
||
raw_temperature -= 0x10000 # 转换为正确的负数表示
|
||
|
||
actual_temperature = raw_temperature / 10.0
|
||
return actual_temperature
|
||
|
||
def update_temperature_label():
|
||
temperature = read_temperature()
|
||
if temperature is not None:
|
||
temperature_label.config(text=f"反应温度: {temperature:.1f} °C")
|
||
else:
|
||
temperature_label.config(text="Error reading temperature")
|
||
root.after(1000, update_temperature_label) # 每秒更新一次
|
||
|
||
# 创建主窗口
|
||
root = tk.Tk()
|
||
root.title("反应温度监控")
|
||
|
||
# 创建标签来显示温度
|
||
temperature_label = ttk.Label(root, text="反应温度: -- °C", font=("Helvetica", 20))
|
||
temperature_label.pack(padx=20, pady=20)
|
||
|
||
# 开始更新温度
|
||
update_temperature_label()
|
||
|
||
# 运行主循环
|
||
root.mainloop()
|