数据类型转化迟迟不行？

[uye4]

试了好几种转换，就是报错。

[kidswong999]

如果涉及代码，需要报错提示与全部代码文本，请注意不要贴代码图片

[uye4]

import sensor, image, time, pyb, math
from pyb import UART,Pin,Timer
import utime
import json
uart=pyb.UART(3,115200,timeout_char=1000)


threshold_index = 0 # 0 for red, 1 for green, 2 for blue

# Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max)
# The below thresholds track in general red/green/blue things. You may wish to tune them...
thresholds = [(30, 100, 15, 127, 15, 127), # generic_red_thresholds
              (30, 100, -64, -8, -32, 32), # generic_green_thresholds
              (0, 100, -16, 127, -128, -31)] # generic_blue_thresholds
#-------------------摄像头初始化-----------------------------
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()
#start = pyb.millis() # get value of millisecond counter  获取毫秒计数器的值
verify_code=b'\xFF\x00\xAA\xEA\xFF'
# Only blobs that with more pixels than "pixel_threshold" and more area than "area_threshold" are
# returned by "find_blobs" below. Change "pixels_threshold" and "area_threshold" if you change the
# camera resolution. "merge=True" merges all overlapping blobs in the image.
def find_max(blobs):
    max_size=0
    for blob in blobs:
     if blob[2]*blob[3]>max_size:
        max_blob=blob
        max_size=blob[2]*blob[3]
    return max_blob
   #if(blob[5]==sensor.width/2) and (blob[6]==sensor.height/2):
while(True):
    clock.tick()
    img = sensor.snapshot().lens_corr(strength = 1.8, zoom = 1.0)#摄像头畸变矫正
    blobs = img.find_blobs([thresholds[2]])
    #print(img.width()/2,img.height()/2)

    if blobs:
        max_blob=find_max(blobs)
        #img.draw_rectangle(max_blob.rect())
        img.draw_cross(max_blob.cx(),max_blob.cy())
        print("you're on camera!")
        #sensor.snapshot().save("LHP.jpg")
        #x="[%u]"%(max_blob.cx())
        #y="[%u]"%(max_blob.cy())
        x=hex(max_blob.cx())
        y=hex(max_blob.cy())
        print(x,y)
        x_h=(x>>8)&0xff
        #x_l=hex(x&0xff)
        #y_h=((y>>8)&0x0ff)
        #y_l=(y&0xff)
        #rc=x_h+x_l+y_h+y_l
        #data=bytearray([0x02,x_h,x_l,y_h,y_l,0x00,rc])
       #print('you send:',data)

报错就和上面一样，我就想把坐标数据拆成十六进制的打包发送

[kidswong999]

hex函数不是你想的那样。他返回的是字符串，用来给人类看的。

>>> hex(100)
'0x64'

(max_blob.cx()>>8)&0xFF
就行

[uye4]

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