改到50还是不行，不连接电脑，只连接给vin加5v电压，补光板会闪一下，然后就不亮了
。

import sensor, image, time,math,lcd,pyb
import ustruct
from pyb import UART, LED
from pyb import Pin, Timer
#50kHz pin6 timer2 channel1
light = Timer(2, freq=50000).channel(1, Timer.PWM, pin=Pin("P6"))
light.pulse_width_percent(1) # 控制亮度 0~100
LED_R = pyb.LED(1)
LED_G = pyb.LED(2)
LED_B = pyb.LED(3)
LED_R.off()
LED_G.off()
LED_B.off()
lcd.init()
red_threshold = (48, 73, 32, 77, -7, 55)
green_threshold  =(50, 76, -26, -5, -2, 23)
blue_threshold  = (44, 75, -3, 40, -84, -37)
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_hmirror(True)
sensor.set_vflip(True)
sensor.skip_frames(n=2000)
sensor.set_auto_gain(True)
sensor.set_auto_whitebal(True)
sensor.set_hmirror(False)
sensor.set_vflip(False)
clock = time.clock()
uart = UART(3,115200)
uart.init(115200, bits=8, parity=None, stop=1 )
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
def sending_data(color,cx,cy):
    global uart;
    data = ustruct.pack("<bbbbbb",
    0x2c,0x12,int(color),int(cx),int(cy),0x5b)
    uart.write(data);
    for i in data:
        print("data的内容是：	",hex(i))
while(True):
    img = sensor.snapshot().lens_corr(strength = 1.8, zoom = 1.0)
    red_blobs = img.find_blobs([red_threshold], x_stride=160, y_stride=130, pixels_threshold=8000)
    green_blobs = img.find_blobs([green_threshold], x_stride=135, y_stride=110, pixels_threshold=8000)
    blue_blobs = img.find_blobs([blue_threshold],x_stride=220, y_stride=150, pixels_threshold=8000 )
    if blue_blobs:
        color_status = ord('B')
        for r in blue_blobs:

            sending_data(color_status,r[5],r[6])
    elif green_blobs:
        color_status = ord('G')
        for y in green_blobs:

            sending_data(color_status,y[5],y[6])
    elif red_blobs:
        color_status = ord('R')
        for y in red_blobs:

            sending_data(color_status,y[5],y[6])
            
    else:
        color_status = ord('A')

光源拓展版的程序插入到其他程序中，在脱机运行过程中只能闪烁一下是什么原因？