串口发送失败

[后来的我们]

为什么会显示这个问题

Single Color RGB565 Blob Tracking Example

This example shows off single color RGB565 tracking using the OpenMV Cam.

import sensor, image, time,json
from pyb import UART

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 = [(0, 98, 92, 17, -128, 127)] # generic_red_thresholds
#(30, 100, -64, -8, -32, 32), # generic_green_thresholds
# (0, 30, 0, 64, -128, 0)] # generic_blue_thresholds

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()

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.

uart = UART(3, 19200)
uart.init(19200, bits=8, parity=None, stop=1)

while(True):
clock.tick()
img = sensor.snapshot()
for blob in img.find_blobs([thresholds[0]], pixels_threshold=200, area_threshold=200, merge=True):
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
print(blob.cx(),blob.cy())
uart.write(blob.cx(),blob.cy())
time.sleep(1000)
print(clock.fps())

这是代码

[后来的我们]

解决了，是因为固件没有刷新