如何解决传输64字节字符串时USB UART出现的问题

问题描述：当一个数据包的正好是64个字节用USBUART PSoC到电脑终端上的程序，观察结果发送，没有显示在PC上的原因和解决方法的终端程序：这是因为在USBUART用户模块的代码的bug。固件应该发送64字节的数据包后发送10数据包长度。在PC的司机会知道该字符串只有在收到这个零长度数据包的接收。由于固件不发送零长度数据包，PC驱动是不知道数据的接收。这个问题只发生在一包到底64字符。其他长度的分组接收良好。这个问题的解决方法是将64字节的包分成两包任何长度，例如32 + 32，62 + 2等问题将被固定在psd5.0 SP6，预计到2009年9月结束。



     以下为原文
  Problem Description:   
When a packet of exactly 64 Bytes is transmitted using USBUART from PSoC to a PC and the result observed on a Terminal program, nothing is displayed on the Terminal program on the PC.   
   
    Reason and Workaround:   
This is because of a bug in the USBUART User module code. The firmware is supposed to send a zero length packet after sending the 64 byte packet. The driver in the PC will know of the reception of the string only after receiving this zero length packet. As the firmware does not send the zero length packet, the PC driver is not aware of the reception of the data. This problem occurs only for a packet of exactly 64 characters. Packets with other lengths are received fine. The workaround for this problem is to split the 64 byte packet into two packets of any lengths, for example 32 + 32, or 62 + 2 etc.   
   
This problem will be fixed in PSD5.0 SP6, which is expected by the end of September 2009.