USB无法发送超过1MByte的文件

你好
我已经连接了USB控制器与SMTAN6 FPGA，我已经配置了这个连接，可以从PC USB接口与CY7C68013A初始化FPGA，我通过USB控制器发送比特流。当司机在1兆字节的传输之后总是挂机时，问题就开始了。
在另一种情况下，与SPAFAN3、SSPANT2、VIRTOX4的旧FPGA相同的接口，不需要超过1MB比特流，并且我没有任何问题。
我不知道哪些是问题？你有同样的问题吗？解决方案是什么？
谢谢
最好的问候



以下为原文
Hello
I have connected the USB controller with a Spartan6 FPGA, I have configured this connec tion for can to initialize the FPGA from PC USB interface with CY7C68013A, I send the bitstream through USB controller. The problem start when the driver hang out it always after in 1Mbyte transfer.
In other case the same interface with old FPGAs with SPARTAN3,SPARTAN2, VIRTEX4, don't need more than 1MByte bitstream and I haven't any problem with them.
I dont know which are the problems? had you had any same problem? and which are the solutions?

thanks

Best regards