请问我的这个中断代码用的对不对,有问题的话,麻烦给小白讲一下
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import sensor, time, image, pyb from pyb import UART from pyb import Pin, ExtInt pin0 = Pin('P0', Pin.IN, Pin.PULL_UP) def callback_PIN0(line): pin0.value()==0 pyb.delay(10) extint = pyb.ExtInt(pin0, pyb.ExtInt.IRQ_FALLING, pyb.Pin.PULL_UP, callback_PIN0) while(True): if pin0.value()==0: uart = UART(3, 115200) if uart.any(): a=uart.readline().decode().strip() pyb.delay(10) sensor.reset() # Initialize the camera sensor. sensor.set_pixformat(sensor.GRAYSCALE) # or sensor.GRAYSCALE sensor.set_framesize(sensor.B128X128) # or sensor.QQVGA (or others) sensor.set_windowing((92,112)) sensor.skip_frames(10) # Let new settings take affect. sensor.skip_frames(time = 5000) #等待5s #SUB = "s1" NUM_SUBJECTS = 2 #图像库中不同人数,一共6人 NUM_SUBJECTS_IMGS = 20 #每人有20张样本图片 # 拍摄当前人脸。 img = sensor.snapshot() #img = image.Image("singtown/%s/1.pgm"%(SUB)) d0 = img.find_lbp((0, 0, img.width(), img.height())) #d0为当前人脸的lbp特征 img = None pmin = 999999 num=0 def min(pmin, a, s): global num if a<pmin: pmin=a num=s return pmin for s in range(1, NUM_SUBJECTS+1): dist = 0 for i in range(2, NUM_SUBJECTS_IMGS+1): img = image.Image("singtown/s%d/%d.pgm"%(s, i)) d1 = img.find_lbp((0, 0, img.width(), img.height())) #d1为第s文件夹中的第i张图片的lbp特征 dist += image.match_descriptor(d0, d1)#计算d0 d1即样本图像与被检测人脸的特征差异度。 print("Average dist for subject %d: %d"%(s, dist/NUM_SUBJECTS_IMGS)) pmin = min(pmin, dist/NUM_SUBJECTS_IMGS, s)#特征差异度越小,被检测人脸与此样本更相似更匹配。 print(pmin) print(num) # num为当前最匹配的人的编号。 uart.write(str(num)+'\r\n') 主要想实现stm32发送信息给openmv,用来触发openmv中断下的接收函数,在接受到信息后,能运行人脸识别程序,再将openmv人脸识别结果发给32
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用不到中断啊,直接死循环里检查串口是否有数据,然后处理,然后发送就完事了。