86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
import ctypes
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import time
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import numpy as np
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import cv2
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# === DLL 加载 ===
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dll = ctypes.WinDLL(r"D:\BodyBalanceEvaluation\backend\tests\SMiTSenseUsbWrapper.dll")
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dll.SMiTSenseUsb_Init.argtypes = [ctypes.c_int]
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dll.SMiTSenseUsb_Init.restype = ctypes.c_int
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dll.SMiTSenseUsb_ScanDevices.argtypes = [ctypes.POINTER(ctypes.c_int)]
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dll.SMiTSenseUsb_ScanDevices.restype = ctypes.c_int
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dll.SMiTSenseUsb_OpenAndStart.argtypes = [
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ctypes.c_int,
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ctypes.POINTER(ctypes.c_uint16),
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ctypes.POINTER(ctypes.c_uint16)
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]
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dll.SMiTSenseUsb_OpenAndStart.restype = ctypes.c_int
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dll.SMiTSenseUsb_GetLatestFrame.argtypes = [
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ctypes.POINTER(ctypes.c_uint16),
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ctypes.c_int
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]
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dll.SMiTSenseUsb_GetLatestFrame.restype = ctypes.c_int
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dll.SMiTSenseUsb_StopAndClose.argtypes = []
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dll.SMiTSenseUsb_StopAndClose.restype = ctypes.c_int
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# === 初始化设备 ===
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ret = dll.SMiTSenseUsb_Init(0)
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if ret != 0:
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raise RuntimeError(f"Init failed: {ret}")
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count = ctypes.c_int()
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ret = dll.SMiTSenseUsb_ScanDevices(ctypes.byref(count))
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if ret != 0 or count.value == 0:
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raise RuntimeError("No devices found")
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rows = ctypes.c_uint16()
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cols = ctypes.c_uint16()
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ret = dll.SMiTSenseUsb_OpenAndStart(0, ctypes.byref(rows), ctypes.byref(cols))
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if ret != 0:
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raise RuntimeError("OpenAndStart failed")
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rows, cols = rows.value, cols.value
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frame_size = rows * cols
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buf_type = ctypes.c_uint16 * frame_size
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buf = buf_type()
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print(f"实时采集: {rows} 行 x {cols} 列")
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# 固定映射范围（和原来 matplotlib 一样）
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vmin, vmax = 0, 1000
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try:
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while True:
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ret = dll.SMiTSenseUsb_GetLatestFrame(buf, frame_size)
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if ret == 0:
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data = np.frombuffer(buf, dtype=np.uint16).reshape((rows, cols))
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# 固定范围映射到 0-255
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norm_data = np.clip((data - vmin) / (vmax - vmin) * 255, 0, 255).astype(np.uint8)
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# 颜色映射（jet）
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heatmap = cv2.applyColorMap(norm_data, cv2.COLORMAP_JET)
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# 放大显示（保持 nearest 效果）
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heatmap = cv2.resize(heatmap, (cols * 4, rows * 4), interpolation=cv2.INTER_NEAREST)
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# 显示
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cv2.imshow("SMiTSense 足底压力分布", heatmap)
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if cv2.waitKey(1) & 0xFF == 27: # ESC 退出
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break
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else:
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print("读取数据帧失败")
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time.sleep(0.05) # 20 FPS
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except KeyboardInterrupt:
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pass
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finally:
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dll.SMiTSenseUsb_StopAndClose()
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cv2.destroyAllWindows()
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print("设备已关闭")
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