PROCESSOR-SDK-AM65X: To flush RP message data

Prashant Mhetar

Hi Team,

We are using RP message to communicate between R5F and A53 cores.

R5F acts as Sender and A53 process acts as Receiver.

The R5F core sends the data packets in milliseconds to the process in A53. At A53 side the process uses /dev/rpmsg0 endpoint to receive the data packets.

Do we have API to flush the IPC buffer at A53 side?

Thanks,

Prashant

over 3 years ago

0 Nick Saulnier over 3 years ago

TI__Guru** 108090 points

Hello Prashant,

An RPMsg message is removed from the virtio when it is read. As far as I am aware there is not an API to completely flush all RPMsg messages from the virtio, but your program can easily implement that functionality by reading from the endpoint until there are no additional messages.

FYI, the AM65x RPMsg documentation is in the Linux Processor SDK under https://software-dl.ti.com/processor-sdk-linux/esd/AM65X/08_02_00_02/exports/docs/linux/Foundational_Components_IPCLLD.html . At this point in time it is missing a lot of information. Most of the information in the AM64x SDK documentation should also apply for AM65x: https://software-dl.ti.com/processor-sdk-linux/esd/AM64X/08_02_00_17/exports/docs/linux/Foundational_Components_IPC64x.html

Regards,

Nick

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PROCESSOR-SDK-AM65X: To flush RP message data