自己写的串口调试，测试代码部分可以接受，但通过文本框发送，硬件有反映，但接受都成FFF，忘高手指点，tbg1820@qq.com-Write your own serial debugging, testing code can be accepted, but sent through text boxes, the hardware is reflected, but to accept all into FFF, expert advice to forget, tbg1820@qq.co