110 lines
3.3 KiB
Python
110 lines
3.3 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
'''
|
|
# @Time : 2025/2/18 9:59
|
|
# @Author : hjw
|
|
# @File : RS485.py
|
|
'''
|
|
|
|
import time
|
|
import threading
|
|
import serial
|
|
from collections import deque
|
|
import logging
|
|
|
|
# 配置日志系统
|
|
logging.basicConfig(
|
|
level=logging.INFO,
|
|
format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
|
|
handlers=[
|
|
logging.FileHandler('controller.log'),
|
|
logging.StreamHandler()
|
|
]
|
|
)
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class RS485Reader:
|
|
def __init__(self, config):
|
|
self.port = config['serial']['port']
|
|
self.baudrate = config['serial']['baudrate']
|
|
self.ser = None
|
|
self.current_weight = 0
|
|
self.running = True
|
|
self.lock = threading.Lock()
|
|
self.buffer = deque(maxlen=10) # 数据缓冲
|
|
self._connect()
|
|
|
|
def _connect(self):
|
|
try:
|
|
self.ser = serial.Serial(
|
|
port=self.port,
|
|
baudrate=self.baudrate,
|
|
bytesize=8,
|
|
parity='N',
|
|
stopbits=1,
|
|
timeout=0.1
|
|
)
|
|
logger.info(f"成功连接串口设备 {self.port}")
|
|
except Exception as e:
|
|
logger.error(f"串口连接失败: {str(e)}")
|
|
raise
|
|
|
|
def read_weight(self):
|
|
cmd = bytes.fromhex('010300000002c40b')
|
|
try:
|
|
self.ser.write(cmd)
|
|
response = self.ser.read(9)
|
|
if len(response) == 9 and response[:3] == bytes.fromhex("010304"):
|
|
weight = int.from_bytes(response[3:5], 'big')
|
|
with self.lock:
|
|
self.buffer.append(weight)
|
|
self.current_weight = sum(self.buffer) // len(self.buffer)
|
|
return True
|
|
return False
|
|
except Exception as e:
|
|
logger.error(f"读取重量失败: {str(e)}")
|
|
self._reconnect()
|
|
return False
|
|
|
|
def tare(self): # 去皮方法
|
|
cmd = bytes.fromhex('01060064000109d5') # 01 06 00 64 00 01 09 d5
|
|
try:
|
|
if self.read_weight(): # 确保有最新数据
|
|
self.ser.write(cmd)
|
|
response = self.ser.read(8)
|
|
if len(response) == 8 and response[:3] == bytes.fromhex("010600"):
|
|
self.buffer.clear() # 清空缓冲
|
|
self.current_weight = 0 # 重置当前重量
|
|
self.read_weight() # 确保有最新数据
|
|
return True
|
|
else:
|
|
self.buffer.clear() # 清空缓冲
|
|
return False
|
|
return False
|
|
except Exception as e:
|
|
logger.error(f"去皮操作失败: {str(e)}")
|
|
self._reconnect()
|
|
return False
|
|
|
|
|
|
def _reconnect(self):
|
|
max_retries = 3
|
|
for i in range(max_retries):
|
|
try:
|
|
if self.ser:
|
|
self.ser.close()
|
|
self._connect()
|
|
return True
|
|
except Exception as e:
|
|
logger.warning(f"重连尝试 {i + 1}/{max_retries} 失败")
|
|
time.sleep(1)
|
|
logger.error("串口重连失败")
|
|
return False
|
|
|
|
def stop(self):
|
|
self.running = False
|
|
if self.ser and self.ser.is_open:
|
|
self.ser.close()
|
|
|