device_config_python/usb_ser.py at main · yzt000000/device_config_python · GitHub

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import serial
from serial.tools import list_ports


class USB_UART():

    def __init__(self):
        self.ports = list_ports.comports()
        for port in self.ports:
            print(f"Found port: {port.device}")

    def uart_write(self, hex_string):

        if self.ports:
            selected_port = self.ports[0].device
            #print(f"Using port: {selected_port}")
            try:
                # 打开串口
                ser = serial.Serial(selected_port, baudrate=9600, timeout=1)
                # 16进制字符串
                #hex_string = "48 65 6C 6C 6F 20 53 65 72 69 61 6C 20 50 6F 72 74 21"  # "Hello Serial Port!"
                hex_bytes = bytes.fromhex(hex_string)
                # 发送16进制字符串
                ser.write(hex_bytes)
                #print(f"Sent hex message: {hex_string}")
                data = ser.read(128)
                if data:
                    hex_data = ' '.join([f'{byte:02X}' for byte in data])
                    #print(f"接收到的十六进制数据: {hex_data}")
                    return hex_data
                # # 关闭串口
                return hex_string
                ser.close()
            except serial.SerialException as e:
                print(f"Error opening or using serial port: {e}")
        else:
            print("No serial ports found.")

    # def uart_read(self, timeout=1, num_bytes=1024):
    #     if self.ports:
    #         selected_port = self.ports[0].device
    #         print(f"使用端口: {selected_port}")
    #         try:
    #             with serial.Serial(selected_port, baudrate=9600, timeout=timeout) as ser:
    #                 data = ser.read(num_bytes)
    #                 if data:
    #                     hex_data = ' '.join([f'{byte:02X}' for byte in data])
    #                     print(f"接收到的十六进制数据: {hex_data}")
    #                     return hex_data
    #                 else:
    #                     print("未接收到数据")
    #                     return None
    #         except serial.SerialException as e:
    #             print(f"打开或使用串口时出错: {e}")
    #             return None
    #     else:
    #         print("未找到串口")
    #         return None

    def uart_read(self, timeout=1, num_bytes=1024):
        if not self.ports:
            print("未找到串口")
            return None

        selected_port = self.ports[0].device
        #print(f"使用端口: {selected_port}")
        try:
            with serial.Serial(selected_port, baudrate=9600, timeout=timeout) as ser:
                data = ser.read(num_bytes)
                if data:
                    hex_data = ' '.join([f'{byte:02X}' for byte in data])
                    #print(f"接收到的十六进制数据: {hex_data}")
                    return hex_data
                else:
                    print("未接收到数据!!!")
                    return None
        except serial.SerialException as e:
            print(f"打开或使用串口时出错: {e}")
            return None