定时器问题,导致程序运行时突然卡死,为什么?
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import sensor, image, time
from pyb import Pin, Timer
sensor.reset() # Reset and initialize the sensor.
#初始化摄像头,reset()是sensor模块里面的函数sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
#设置图像色彩格式,有RGB565色彩图和GRAYSCALE灰度图两种sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240)
#设置图像像素大小,sensor.QQVGA: 160x120,sensor.QQVGA2: 128x160 (一般用于LCD
#扩展板),sensor.QVGA: 320x240,sensor.VGA: 640x480, sensor.QQCIF: 88x72,sensor.QCIF: 176x144,sensor.CIF: 352x288sensor.skip_frames(time = 2000) # Wait for settings take effect.
clock = time.clock()def tick(timer): # we will receive the timer object when being called
print("Timer callback")tim = Timer(4, freq=1) # create a timer object using timer 4 - trigger at 1Hz
tim.callback(tick) # set the callback to our tick functionwhile (True):
clock.tick() # Update the FPS clock.
img = sensor.snapshot() # Take a picture and return the image.
#截取当前图像,存放于变量img中。注意python中的变量是动态类型,不需要声明定义,直接用即可。
#print(clock.fps())请在这里粘贴代码