下面是用Python寫的測試代碼
#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
單元測試:Python串口發送中文,SSCOM串口助手接收,看在UTF-8、GB2312、GBK三種編碼下SSCOM助手對於中文的支持程度。
"""
import serial
if __name__ == "__main__":
try:
port = "COM15" # Win Os use COM?; Linux OS use /dev/tty???
bps = 115200
wait_time = 5
serial_0 = serial.Serial(port, bps, timeout=wait_time)
print("打開的串口參數:", serial_0)
print(serial_0.port)
print(serial_0.baudrate)
result = serial_0.write("\n".encode("ASCII"))
print("寫字節數:",result)
serial_0_send_bytes_count = result
if True:
result = serial_0.write("全志民\n".encode("UTF-8"))
print("寫字節數:", result)
serial_0_send_bytes_count += result
if True:
result = serial_0.write("全志民\n".encode("GB2312"))
print("寫字節數:", result)
serial_0_send_bytes_count += result
if True:
result = serial_0.write("全志民\n".encode("GBK"))
print("寫字節數:", result)
serial_0_send_bytes_count += result
print("serial_0_send_bytes_count = ",serial_0_send_bytes_count)
except Exception as e:
print("異常:", e)
測試結果如下圖所示(Win10)
測試結果如下圖所示(樹莓派4)
注意串行端口號的寫法(在WIN和LINUX下是不同的)
結果分析
1)Python腳本文本文件的字符編碼用的是UTF-8(沒有BOM),在用串口發送時通過encode()函數把UTF-8編碼轉換爲指定編碼,再發送出去。
2)SSCOM串口助手能正確解釋GBK和GB2312,但是不能解釋出UTF-8。
3)很多的串口助手都不能很好地顯示UTF-8編碼,這是在用串口調試時需要注意的。