硬件连接
1、Openmv端
这里OpenMV端仅作为数据的发送端，所以只需要共地，以及OpenMV的TX（P4）与开发板的RX端连接即可。
2、STM32端
将开发板连接STM芯片RX端与转串口TX端的跳帽取下，再将OpenMV的TX端（P4）与STM的RX连接。如果使用USB转TTL则将TTL的RX端与STM的TX端连接，STM的RX端与OpenMV的TX端（P4）连接，然后共地，这样就可以在串口调试助手中查看数据的传输情况了。
3.代码
3.1、OpenMV端
# Blob Detection and uart transport
import sensor, image, time, math, pyb
from pyb import UART
import json
import ustruct
# For color tracking to work really well you should ideally be in a very, very,
# very, controlled enviroment where the lighting is constant...A
yellow_threshold = (8, 22, -60, -3, 127, -128)
# You may need to tweak the above settings for tracking green things...
# Select an area in the Framebuffer to copy the color settings.sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA) #设置图像大小QVGA大小为320*240，所以中心坐标应该是（160，120）
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
red_threshold_01=(66, 31, -58, -24, 127, -128)
clock = time.clock()uart = UART(3, 115200)
uart.init(115200, bits=8, parity=None, stop=1) # OpenMV端初始化与STM端配置一样即可。#**************************传输数据的函数******
)
