How to send a remote data request in CAN-FD

[Choudharyas]

Hello,

I am working on CAN-FD project and and I am able transmit and receive data. Currently it is continuously sending and receiving the data. But I want to send data only when receiver sends data requests. How can I do that?

thanks for help

[mƎALLEm]

Hello,

You need to use Remote frame:

Configure a filter that passes only the remote frame with that specific ID. Reserve FIFO1 to receive a such frame. In the related FIFO FDCAN RX interrupt callback you need to send the data frame you want.

From the receiver side you need to send a RTR frame with a specific ID that should pass the sender filter.

Hope that helps you as well as others ..