为什么使用openmv的串口发送数据时会出现打不开串口
-
# Blob Detection and uart transport import sensor, image, time #from pyb import UART from machine import UART import json # For color tracking to work really well you should ideally be in a very, very, # very, controlled enviroment where the lighting is constant... yellow_threshold = (65, 100, -10, 6, 24, 51) # 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() # Initialize the camera sensor. sensor.set_pixformat(sensor.RGB565) # use RGB565. sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed. sensor.skip_frames(10) # Let new settings take affect. sensor.set_auto_whitebal(False) # turn this off. clock = time.clock() # Tracks FPS. # OpenMV4 H7 Plus, OpenMV4 H7, OpenMV3 M7, OpenMV2 M4 的UART(3)是P4-TX P5-RX uart = UART(3, 115200) #OpenMV RT 注释掉这一行，用下一行UART(1) #uart = UART(1, 115200) #OpenMV RT 用UART(1)这行，注释掉上一行UART(3) # OpenMV RT 只有串口UART(1)，对应P4-TX P5-RX; OpenMV4 H7 Plus, OpenMV4 H7, OpenMV3 M7 的UART(1)是P0-RX P1-TX 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 while(True): img = sensor.snapshot() # Take a picture and return the image. blobs = img.find_blobs([yellow_threshold]) if blobs: max_blob=find_max(blobs) print('sum :', len(blobs)) img.draw_rectangle(max_blob.rect()) img.draw_cross(max_blob.cx(), max_blob.cy()) output_str="[%d,%d]" % (max_blob.cx(),max_blob.cy()) #方式1 #output_str=json.dumps([max_blob.cx(),max_blob.cy()]) #方式2 print('you send:',output_str) uart.write(output_str+'\r\n') else: print('not found!')
-
你没初始化uart.init(9600, bits=8, parity=None, stop=1)
-
星瞳串口助手需要连接的是串口调试扩展板的COM或者是TTL转USB模块的COM，不是连接OpenMV USB上的COM