openmv串口接收数据串行的问题

mesi

    if uart.any() :
        a = uart.readline().decode()

串口接收使用这样的代码

服务器发送消息连续发送的状态下串口接收的数据会出现串行的情况除了在服务器上做延时操作 openmv上的代码需要修改吗？

下面是服务器连续发送 www.singtown.com 串口接收的情况
0_1615173708480_1615173602(1).jpg

kidswong999

全部的代码是什么？

我看看你的初始化的代码对不对。

mesi

import sensor, image, time ,tv
from pyb import UART
import hashlib
from pyb import Pin, Timer

sensor.reset()
sensor.set_pixformat(sensor.GRAYSCALE)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
clock = time.clock()
uart = UART(3, 19200)
tv.init() # 初始化tv
# 50kHz pin6 timer2 channel1
#light = Timer(2, freq=18000).channel(1, Timer.PWM, pin=Pin("P6"))
#light.pulse_width_percent(100) # adjust light 0~100
#crc16 modbus
def crc16(x, invert):
    a = 0xffff
    b = 0xa001
    #x = x.encode(encoding='UTF-8',errors='strict')
    for byte in x:
        print(ord(byte))
        a ^= ord(byte)

        for i in range(8):

            last = a % 2
            a >>= 1
            if last == 1:
                a ^= b

    print(a)
    s = hex(a)

    return s[4:6]+s[2:4] if invert == True else s[2:4]+s[4:6]


while(True):
    clock.tick()
    img = sensor.snapshot()
    #使用无畸变镜头
    #img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.
    for code in img.find_qrcodes():
        img.draw_rectangle(code.rect(), color = (255, 0, 0))
        #print(code.payload())
        #fmd5 = hashlib.md5(code.payload())
        #fmd5 = hashlib.sha256(code.payload()).digest()
        #data2 =crc16(code.payload(),False)
        #print(fmd5)
        #print(data2)
        if code.payload() is not None :
            uart.write(code.payload()+ "\r")

    tv.display(img)
    if uart.any() :
        a = uart.read().decode()
        print(a)
   # print(clock.fps())

服务器收到串口信息然后转发回串口的是 www.singtown.com\r

mesi

a = uart.readline().decode() 改为 a = uart.read().decode() 是这个问题吗

kidswong999

uart = UART(3, 19200)改为uart = UART(3, 19200,timeout=1000)

mesi

@kidswong999 谢谢