UDB FIFO读取无法升起空标志该怎么办？

我的意图是：开发一个比较值的UDB数据路径。如果是空的，则通过软件或DMA将字节写入FIFO F0寄存器中，清除F0空标志。然后将写入的字节读入数据路径A0寄存器，它应该再次抬起F0空标志，并与预先确定的值进行比较。如果值不匹配，则从A0寄存器写入F1寄存器，通过提高“NoToWin”标志，将触发通过软件或DMA进行外部读取。
问题声明：通过我的UDB状态机将FIFO F0寄存器的内容移动到A0中，不会重新引发F0空标志。当我用A0读取F0的数据时，读/写指针不被更新，因此空标志的状态也不被更新。
我已经试过了：我已经证实，一旦写（在我的状态机的第一个状态），这f0_empty国旗从高到低预期。我已经证实了我发送的数据使得它的方式进入登记A0，即A0肯定是检索数据不如预期。
可能关注的领域：FIFO在UDB是32位，这意味着，即使我只写8位，有24位补零写入FIFO的写指针，递增4，因此需要4读空FIFO？这是我唯一能想到的，谁能确定？
我觉得这个信息就足以让感动，但我已经附上任何人的情况下我的工作档案很好奇。感谢你提前为任何帮助我收到关于这个话题的时候，我在墙上撞我的头两天现在在这。
个人设计-0.0捆绑式01.ZIP
1.4兆字节



     以下为原文
  My Intent: Develop a UDB datapath which compares values.  A byte is written into the Fifo F0 register via Software or DMA if it is empty, which clears the F0_Empty flag.  The written byte is then read into the datapath A0 register, which should raise the F0_Empty flag again, and compared to a pre-determined value.  If the value doesn't match it is written from the A0 register into the F1 register, which will trigger an external read via Software or DMA by raising the "Not_Empty" flag.
    Problem Statement: Moving the contents of the fifo F0 register into A0 via my udb state machine does not re-raise the F0_Empty flag.  It seems that when I read the data from F0 with A0 the read/write pointers are not updated, and thus neither is the status of the empty flags.
    I've Tried: I have confirmed that once written (in the very first state of my state machine), the F0_Empty flag goes from high to low as expected.  I have confirmed that the data I send makes its way into register A0, which means A0 is definitely retrieving the data as expected.
    Possible Areas of Concern: The Fifo's in the udb are 32 bits, could that mean that even if I only write 8 bits, there are 24 bits of zero padding being written into the Fifo, which incremented the write pointer by 4, and thus requires 4 reads to empty the Fifo?  This is the only thing I personally could think of, can anyone confirm this?
    I thought this information would be enough to get moving, but I've attached a copy of my workspace archive in case anyone was curious.  Thank you ahead of time for any help I recieve on this topic, I've been banging my head against a wall for 2 days now over this.

•   PersonalDesigns-000.Bundle01.zip 1.4 MB