OPENMV定时器发送数据报错

2ecb

import sensor, image, time
from pyb import UART
from pyb import millis
from math import pi, isnan
import time
from pyb import Pin, Timer
#from pid import PID
#若优化在cricket_test.py修改 cricket_control.py为最终函数

def tick(timer):
    #print("Timer callback")
     output_str="[%d,%d]" % (x_now,y_now)
     uart.write(output_str+'\r\n')
     print(max_blob.cx(),max_blob.cy())                     #2个

tim = Timer(4, freq=1)
tim.callback(tick)

sensor.reset()
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.RGB565)
sensor.skip_frames(time = 2000)
clock = time.clock()

uart = UART(3, 115200)

red_threshold = ((34, 63, 27, 80, 3, 127))
x_now=y_now=0

def find_max(blobs):
    max_size=0
    for blob in blobs:
        if blob[2]*blob[3] > max_size:
            max_blob=blob
            max_size = blob[2]*blob[3]
    return max_blob


while(True):
        clock.tick()
        img = sensor.snapshot()
        blobs = img.find_blobs([red_threshold],roi=(55,14,225,218),pixels_threshold=2, area_threshold=2)
        if blobs:
             max_blob = find_max(blobs)
             img.draw_rectangle(max_blob.rect())
             img.draw_cross(max_blob.cx(), max_blob.cy(),color=0)
             x_now=max_blob.cx()                                    #x_now:x方向上现在的色块中心坐标位置
             y_now=max_blob.cy()                                    #y_now:y方向上现在的色块中心坐标位置![0_1563168383679_QQ图片20190715132608.png](https://fcdn.singtown.com/8931770b-b870-4152-9aef-abf70e2a2918.png)

kidswong999

我给你写一个例子。
中断函数不应该再多了。字符串拼接应该在死循环里面做。

import sensor, image, time
from pyb import UART
from pyb import millis
from math import pi, isnan
import time
from pyb import Pin, Timer
#from pid import PID
#若优化在cricket_test.py修改 cricket_control.py为最终函数

sensor.reset()
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.RGB565)
sensor.skip_frames(time = 2000)
clock = time.clock()

uart = UART(3, 115200)
output_str = ''
def tick(timer):
    #print("Timer callback")
    global uart
    global output_str
    uart.write(output_str)
tim = Timer(4, freq=1)
tim.callback(tick)

red_threshold = ((34, 63, 27, 80, 3, 127))
x_now=y_now=0

def find_max(blobs):
    max_size=0
    for blob in blobs:
        if blob[2]*blob[3] > max_size:
            max_blob=blob
            max_size = blob[2]*blob[3]
    return max_blob


while(True):
        clock.tick()
        img = sensor.snapshot()
        blobs = img.find_blobs([red_threshold],roi=(55,14,225,218),pixels_threshold=2, area_threshold=2)
        if blobs:
             max_blob = find_max(blobs)
             img.draw_rectangle(max_blob.rect())
             img.draw_cross(max_blob.cx(), max_blob.cy(),color=0)
             x_now=max_blob.cx()                                    #x_now:x方向上现在的色块中心坐标位置
             y_now=max_blob.cy()                                    #y_now:y方向上现在的色块中心坐标位置![0_1563168383679_QQ图片20190715132608.png](https://fcdn.singtown.com/8931770b-b870-4152-9aef-abf70e2a2918.png)

2ecb

@kidswong999 在 OPENMV定时器发送数据报错中说：

output_str = ''

感谢大佬，受教了！