MCP2515读取缓冲区排序？

大家好。我有一个应用程序，其中一个MCP2515连接到一个嵌入式Linux模块的SPI总线。我有一个小麻烦，使CAN数据包的正确顺序。我有过滤器设置，以便任何有效的CAN消息将被接收。我有BUKT设置，如果RXB0是满的，它可以滚动。对于RXB1，问题是我可以每10毫秒左右查询一次设备。有时在两个缓冲区都有消息。我怎么知道先收到哪个消息？我能检查一些标志的组合吗？这可能是显而易见的——RXB0中的第一个出现，其次是RXB1上的一个，对吗？但是有一个条件（我想）可能是不正确的：-假设我对芯片进行投票，只有RXB0IF被设置，这意味着当我正在读取缓冲区时，在RXB0中有一条消息，第二条消息到达程序集缓冲区。它会滚入RXB1。在我再次轮询之前，我等待10毫秒，在此期间，第三条消息到达并放入RXB0。下次轮询时，RXB0IF和RCB1IF都被设置，但我如何知道哪一条消息先到达？



      以下为原文

    Hi everyone.
I have an application where an MCP2515 is connected to the SPI bus of an embedded linux module.
I'm having a little trouble getting CAN packets in the correct order.

I have the filters set so that any valid can message will be received.
I have BUKT set so that if RXB0 is full it can roll-over to RXB1

The issue is that I can poll the device every 10ms or so.
Sometimes there are messages in both buffers. How can I tell which message was received first? Is there some combination of flags I can check?

It might seem obvious - the one in RXB0 came first, followed by the one on RXB1 right? But there is a condition (I think) where this might not be true:-

Say I poll the chip and only RXB0IF is set, meaning there is a message in RXB0
While I'm reading the buffer a 2nd message is arriving in the assembly-buffer. It gets rolled into RXB1.
I wait 10 ms before I poll again, during which time a 3rd message arrived and got put into RXB0.

The next time I poll, both RXB0IF and RCB1IF are set, but how can I tell which message arrived first?