37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
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import serial
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import struct
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from usb_pb2 import UsbPackageType
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from serial.tools import list_ports
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def make_header(typeid: UsbPackageType, length: int) -> bytearray:
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struct_format = '<HHB' # '<' for little-endian, 'H' for uint16_t, 'B' for uint8_t
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# Calculate the check byte as the sum of length and type
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typeidint = int(typeid)
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check = (length & 0xFF) + ((length >> 8) & 0xFF) + (typeidint & 0xFF) + ((typeidint >> 8) & 0xFF)
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packed_data = struct.pack(struct_format, length, typeid, check)
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return packed_data
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def send_package(typeid : UsbPackageType, data: bytearray, serial: serial.Serial):
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head = make_header(typeid, len(data))
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package = head + data
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serial.write(package)
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def setup_connection() -> serial.Serial:
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stm_port = None
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for port in list_ports.comports():
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print(port)
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if "STM32 Virtual ComPort" in port.description:
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stm_port = port.device
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break
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if stm_port is None:
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print("STM32 Virtual ComPort not found")
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exit(-1)
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else:
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# Open the serial port
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ser = serial.Serial(stm_port,baudrate=5000000)
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return ser
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