35 lines
1.0 KiB
Python
35 lines
1.0 KiB
Python
import ctypes
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import time
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import os
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# 加载当前目录下的 so 文件
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so_path = os.path.abspath("/usr/lib/aarch64-linux-gnu/libcrtdb.so")
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mylib = ctypes.CDLL(so_path)
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# 声明函数原型（如果有参数和返回值的话需要详细定义）
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mylib.initRtdb(0, 0, 1); # 返回值为 void
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# 设置函数返回值类型为 double（ctypes.c_double）
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mylib.getRtdbPointValue.restype = ctypes.c_double
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# 定义参数类型（函数没有返回值，所以 restype 可以不写）
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mylib.setRtdbPointValue.argtypes = [
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ctypes.c_int, # rtdb_type_e -> int
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ctypes.c_uint16, # devType
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ctypes.c_uint16, # devId
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ctypes.c_uint16, # pointId
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ctypes.c_double # value
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]
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# 每隔1秒调用一次
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while True:
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value = mylib.getRtdbPointValue(0, 0, 0, 7);
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print(f"Double value: {value}")
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i_val = int(value)
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print(f" 心跳 Int value: {i_val}")
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mylib.setRtdbPointValue(0, 0, 0, 1, 7.0);
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val = mylib.getRtdbPointValue(0, 0, 0, 1);
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print(f"读取写入的值为: {val}")
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time.sleep(1)
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