无法用串口通信的方式给电脑发消息，会报错，下是源代码

import sensor,image,lcd
import KPU as kpu
from fpioa_manager import fm
from machine import UART
import time
# need your connect hardware IO 10/11 to loopback
fm.register(10, fm.fpioa.UART1_TX, force=True)
fm.register(11, fm.fpioa.UART1_RX, force=True)
uart = UART(UART.UART1, 115200, 8, 1, 0, timeout=1000, read_buf_len=4096)
uart.write(b'hello world')

lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_windowing((224, 224))
sensor.set_vflip(1)
sensor.run(1)
classes = ["battery","pills","bananas","cans","apples","bottles","ceram","green vegatable","broccoli","boxes","glass","cigarette","orange","eggshell","spitball"]
task = kpu.load("/sd/yolov2.kmodel")
anchor = (0.57273, 0.677385, 1.87446, 2.06253, 3.33843, 5.47434, 7.88282, 3.52778, 9.77052, 9.16828)
a = kpu.init_yolo2(task, 0.8, 0.3, 5, anchor)
while(True):
    img = sensor.snapshot()
    a = img.pix_to_ai()
    code = kpu.run_yolo2(task, img)
    if code:
        for i in code:
            uart.write(code)  # send data back
            a=img.draw_rectangle(i.rect(),color = (0, 255, 0))
            a = img.draw_string(i.x(),i.y(), classes[i.classid()], color=(255,0,0), scale=3)
        a = lcd.display(img)
    else:
        a = lcd.display(img)
a = kpu.deinit(task)