I2C协议中,发送物体的位置,发送不了,如何解决?
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import sensor, image, time
import pyb , ustruct
yellow_threshold = ( 46, 100, -68, 72, 58, 92)
sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False) # turn this off.
clock = time.clock() # Tracks FPS.while(True):
clock.tick() # Track elapsed milliseconds between snapshots().
img = sensor.snapshot() # Take a picture and return the image.
blobs = img.find_blobs([yellow_threshold], area_threshold = 2000)
if blobs:
#print('sum : %d'% len(blobs))text=[] for b in blobs: # Draw a rect around the blob. img.draw_rectangle(b.rect()) # rect img.draw_cross(b.cx(), b.cy()) # cx, cy text = "int(b.cx()), int(b.cy())" data = ustruct.pack("<%ds" % len(text), text)
bus = pyb.I2C(2, pyb.I2C.SLAVE, addr=0x12)
bus.deinit() # 完全关闭设备
bus = pyb.I2C(2, pyb.I2C.SLAVE, addr=0x12)
print("Waiting for Arduino...")请注意,为了正常同步工作,OpenMV Cam必须 在Arduino轮询数据之前运行此脚本。
否则,I2C字节帧会变得乱七八糟。所以,保持Arduino在reset状态,
直到OpenMV显示“Waiting for Arduino...”。
while(True):
try:
bus.send(ustruct.pack("<h", len(data)), timeout=10000) # 首先发送长度 (16-bits).
try:
bus.send(data, timeout=10000) # 然后发送数据
print("Sent Data!") # 没有遇到错误时,会显示
except OSError as err:
passexcept OSError as err: pass