回复: 没UART扩展板，拿openmv和串口助手通信，就是我先把代码保存到flash里，上电后串口助手没有收到数据

import sensor
import time
import pyb
from machine import UART

RED_threshold = (30,40,12,127,-7,127)


sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time=2000)
sensor.set_auto_gain(False)
sensor.set_auto_whitebal(False)

uart = UART(3, 115200)

clock = time.clock()

send1 = 'p'
send2 = 'q'

#=======找到画面的中心位置
img_center_x = sensor.width() //2
img_center_y = sensor.height() //2
threshold = 30

#=======找到最大的色块
def find_max(blobs):
    max_size = 0
    for blob in blobs:
        if blob.pixels() >max_size :
            max_blob = blob
            max_size = blob.pixels()
    return max_blob



#=======主循环
while True:
    clock.tick()
    img = sensor.snapshot()
    blobs = img.find_blobs([RED_threshold])
    if blobs:
        max_blob = find_max(blobs)
        blob_cx = max_blob.cx()
        blob_cy = max_blob.cy()
        img.draw_rectangle(max_blob.rect(), color=(0, 0, 255))
        img.draw_cross(blob_cx ,blob_cy ,colar=(255,0,0))
        #===相对位置

        delta_x = blob_cx - img_center_x
        delta_y = blob_cy - img_center_y


        if abs(delta_x) < threshold and abs(delta_y) < threshold :#  消抖
            send1 = 'o'
        else :
            if delta_x >30 :
                send1 = 'a'
            elif delta_x > 0:
                send1 = 'b'
            elif delta_x < -30 :
                send1  = 'c'
            else :
                send1 = 'd'


            #====y
            if delta_y >50 :
                send2 = 'x'
            elif delta_y > 20:
                send2 = 'z'
            elif delta_y < -50 :
                send2  = 'y'
            elif delta_y < -50 :
                send2  = 'w'
            else :
                send2 = 'o'
    else :
        print("not find")
    print("you send:",send1)
    print("you send:",send2)
    uart.write(send1)
    time.sleep_ms(2)
    uart.write(send2)

    print(clock.fps())