70 lines
2.3 KiB
Python
70 lines
2.3 KiB
Python
import serial
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import serial.tools.list_ports
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class TTLCommunicator:
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def __init__(self, baudrate=115200, timeout=0.1):
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"""初始化TTL通信对象"""
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self.baudrate = baudrate
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self.timeout = timeout
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self.ser = None
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self.connected = False
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@staticmethod # 声明为静态方法
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def find_usb_ttl_port():
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"""自动查找USB转TTL设备端口（静态方法，不依赖实例状态）"""
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ports = list(serial.tools.list_ports.comports())
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for port in ports:
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if "USB Serial" in port.description or "CH340" in port.description or "PL2303" in port.description:
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return port.device
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return None
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def connect(self, port=None):
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"""连接到USB转TTL设备"""
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try:
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if not port:
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# 调用静态方法时，可直接通过类名或实例调用（此处保持原有逻辑）
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port = self.find_usb_ttl_port()
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if not port:
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print("未找到USB转TTL设备")
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return False
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self.ser = serial.Serial(
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port=port,
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baudrate=self.baudrate,
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timeout=self.timeout,
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parity=serial.PARITY_NONE,
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stopbits=1,
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bytesize=serial.EIGHTBITS
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)
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if self.ser.is_open:
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self.connected = True
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print(f"已连接TTL设备：{port}（波特率：{self.baudrate}）")
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return True
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return False
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except Exception as e:
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print(f"连接失败：{str(e)}")
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return False
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def send_data(self, data_str):
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"""发送数据到TTL设备"""
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if not self.connected or not self.ser:
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print("未连接TTL设备，请先调用connect()")
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return False
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try:
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data = (data_str + "\n").encode("utf-8") # 加换行符作为结束标志
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self.ser.write(data)
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self.ser.flush()
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return True
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except Exception as e:
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print(f"发送失败：{str(e)}")
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return False
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def close(self):
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"""关闭串口连接"""
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if self.ser and self.ser.is_open:
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self.ser.close()
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self.connected = False
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print("TTL连接已关闭") |