s32k312 flexcan

[fengba_360]

Hello, if I use FLEX CAN RX FIFO to receive CAN messages, is there a way to know whether the received data frame is a standard frame or an extended frame,  my FIFO IdFilterTable is configured with both standard frame and extended frame entries。

[fengba_360]

I'm using an SDK, are there corresponding API functions?

[Senlent]

Hi@fengba_360

You should know that Enhance Receiver FIFO must enable CAN FD, so I don’t know what your intention is.

This CS bit should include the IDE bit.

[Senlent]

Hi@fengba_360

   

[fengba_360]

Actually, my goal is to identify whether a frame received through the legacy FIFO is an extended frame or a standard frame. Based on your guidance, am I correct in understanding that I can check if the received message is a standard frame or an extended frame by performing the operation cs >> 22 & 0x01 on the structure's content? thanks！

[Senlent]

Hi@fengba_360

cs >> 22 & 0x01 ,yes, it's right to get IDE bit value.