[问答]

UDB FIFO读取无法升起空标志该怎么办？

问答对人有帮助，内容完整，我也想知道答案 0 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 1.4兆字节以上来自于百度翻译以下为原文 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 0
2019-7-30 13:50:24　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × 36切53 该类别下有 65 个回答。邀请回答 hnui2002 该类别下有 50 个回答。邀请回答细水爱长流该类别下有 33 个回答。邀请回答不cdvdhgdh 该类别下有 31 个回答。邀请回答 iwuwjgj 该类别下有 26 个回答。邀请回答 cslb2000 该类别下有 25 个回答。邀请回答珠海易胜该类别下有 23 个回答。邀请回答 ggfx 该类别下有 23 个回答。邀请回答 h1654155958.0210 该类别下有 22 个回答。邀请回答 hrtuoyu 该类别下有 22 个回答。邀请回答 ncmza 该类别下有 21 个回答。邀请回答 shaoye88 该类别下有 21 个回答。邀请回答瑾年Invader 该类别下有 20 个回答。邀请回答望望Ll 该类别下有 20 个回答。邀请回答 april_yu 该类别下有 20 个回答。邀请回答 zkzk196599 该类别下有 19 个回答。邀请回答 nvwuwy 该类别下有 18 个回答。邀请回答 lucas_songlea 该类别下有 18 个回答。邀请回答 fan7572 该类别下有 17 个回答。邀请回答 zhan81411 该类别下有 17 个回答。邀请回答举报王岩相关推荐 • FIFO的写入读取 6584 • 使用DSIC30F6010A30I/PT串行通信 888 • 如何在udb fifo中写入一系列布尔值？ 1865 • 如何确保手动模式端点和从fifo的安全？ 1373 • FIFO Generator v13.0（Rev 1）的标志/数据计数行为不正确的解决办法？ 2738 • STM32控制带FIFO的ov7725，显示在7寸TFT屏上怎么显示，超过了FIFO的存储空间，怎么办 5541 • esp32指示灯不亮，PC也无法检测到该怎么办呢？ 721 • STM32控制带FIFO的ov7725，显示在7寸TFT屏上怎么显示，超过了FIFO的存储空间，怎么办 2369 • 往.xlm文件里写入中文（打开文字正常），别的软件读取文字显示乱码，该怎么办 5389 • oka40i的qt程序无法继续配置该怎么办呢 1940 1个回答

答案对人有帮助，有参考价值 0 我不再使用的数据通路fewtries实现一些编辑过的（要求！）信号未被解释。现在我在等待下一个版本。我有最后一个UDB / datapathproblem是通过创建一个例如我和提供一个有据可查的小源产生错误完全解决。有一些数据通路的大师在工作在柏的我可以向你保证。这可能需要一些时间，但它们确实会有帮助。在这页的顶部：支持&；社区>；技术支持- >；创建一个例如我鲍勃以上来自于百度翻译以下为原文 I stopped using the datapath editor after a few tries realizing that some of the (required!!) signals were not accounted for. Now I'm waiting for the next version. The last UDB/DataPath problem I had was solved completely by creating a MyCase and supplying a well documented small source that produced the error. There are some DataPath Gurus at work at Cypress's I can assure you. It might take some time, but they will really help. On top of this page: Support&Community -> Technical Support -> Create a MyCase Bob

2019-7-30 14:25:03 评论举报王琳