FX3 GPIFtoUSB示例丢失GPIF数据

你好，
从EZ-USB FX3 SDK  1.3固件 BooToFFGPIFTUSOB的例子接近我的应用需求-连续采样GPIF数据，并将其传输到PC。但在测试过程中，我正在经历从GPIF接口收集的缺失数据。
测试是在FX3超高速探索者工具箱上进行的。GPIF接口的数据是由FPGA连接到KIT的。这是一个简单的14位计数器在38兆赫时钟。
示例中的DMA被设置为自动模式（MualalSoDMA定义禁用）。
为了最小化我这边的错误，为了收集数据，我使用USB控制中心实用程序-传输文件的功能。要传输的字节设置为2MB，结果在文件中。
但是每个16KB（0x4000）都有缺失的数据。
就像下一张照片：
在这种情况下，大约有26个丢失的FPGA时钟。有时它会导致超过400的FPGA时钟丢失。
由于USB 3连接，我期待连续的数据流。
通过设置CLKDIV＝8来减缓GPIF接口是没有帮助的。
有什么暗示我忽略了什么，或者如何改进它？
最好的问候，
斯拉沃米尔



     以下为原文
  Hello,

example from EZ-USB FX3 SDK1.3firmwareboot_fwgpiftou*** fit close to my application demands - continuously sample GPIF data, and transfer it to PC. But during tests, i am experiencing missing data collected from GPIF interface.
Tests was performed on FX3 Superspeed Explorer kit. Data for GPIF interface are produced by FPGA connected to kit. It's a simple 14 bit counter at 38MHz clock.
DMA in the example is set to AUTO mode (MANUAL_DMA definition disabled).
To minimize errors on my side, for data collecting i use USB control center utility - transfer file-in function. Bytes to transfer is set to 2MB, and result is in the file.

But each 16kB (0x4000) there are missing data.
Like in the next picture:

In this case it's approximately 26 missing FPGA clocks. Sometimes it rise to more than 400 missing FPGA clocks.
Because of USB 3.0 connection i am expecting continuous data flow.
Slowing down GPIF interface by setting clkDiv=8 doesn't help.
Any hint what am i overlook, or how can improve it?

Best regards,
Slavomir