Hi, yf
NuttX.RPTUN abstracts the OpenAMP.RemoteProc and the OpenAMP.RpmsgVirtio
NuttX.Rpmsg wraps the OpenAMP.Rpmsg and add more rpmsg api.
I guess you want to ask whether Rpmsg can support different transport layer
such as SPI/UART/I2C.
Acctually, Rpmsg was designed to be compatible with different transport layer,
and VirtIO is a very common transport, we call it Rpmsg VirtIO.
And we are implementing the Rpmsg SPI/Uart Transport Layer in NuttX, we divide
it to serveral steps:
1. NuttX.Rpmsg wrapper the OpenAMP.Rpmsg but the coupling between NuttX.Rpmsg
and NuttX.Rptun (the wrapper of OpenAMP Rpmsg VirtIO and Remoteproc) is severe,
so we decoupled the NuttX.Rpmsg and Nuttx.Rptun, here are some PRs:
decoupling rptun ping and rptun_virtio_device, rptun ping and rptun. by
wyr8899 · Pull Request #11537 · apache/nuttx
(github.com)<https://github.com/apache/nuttx/pull/11537>
decoupling rptun ping and rptun_virtio_device, rptun ping and rptun. by
wyr8899 · Pull Request #11537 · apache/nuttx
(github.com)<https://github.com/apache/nuttx/pull/11537>
rptun: Strip rpmsg and rptun. Extract common rpmsg api in rptun.c to
rpmsg.c, rpmsg provide rpmsg_ops to each backend for specific implementation.
by wyr8899 · Pull Request #11536 · apache/nuttx
(github.com)<https://github.com/apache/nuttx/pull/11536>
rpmsgfs: decoupling rpmsgfs server and rpmsg virtio. by wyr8899 · Pull
Request #11591 · apache/nuttx
(github.com)<https://github.com/apache/nuttx/pull/11591>
2. Implement the Rpmsg SPI/UART Transport in NuttX, we has implemented the
Rpmsg UART transport and verified in STM32 board in our internal Git, and the
design and coding of Rpmsg SPI transport
has been finished, we will upstream when they have been fully verified in
some projects.
3. Implement the Rpmsg SPI/UART Transport in Linux, then the NuttX can
communicate with Linux via Rpmsg VirtIO, Rpmsg Uart, Rpmsg SPI.
________________________________
Bowen Wang, wangbow...@xiaomi.com
From: yfliu2008<mailto:yfliu2...@qq.com.INVALID>
Date: 2024-01-26 13:00
To: dev<mailto:dev@nuttx.apache.org>
Subject: [External Mail]RPTUN and RPMSG
Dear experts,
I am wondering where we can find high level introduction about the RPTUN and
RPMSG concepts in NuttX?
I can't find explanations of the two NuttX drivers and their relationship with
the two OpenAMP components "RemoteProc" and "RPMsg". Can we simply take that
the "NuttX.RPTUN" abstracts the "OpenAMP.RemoteProc" and the "NuttX.RPMSG"
wraps the "OpenAMP.RPMsg"?
Can we also take that RPMSG models the communication channel between master and
a remote core, like other master/slave buses such as SPI/I2C, thus various
proxy drivers (like block, uart, syslog etc) for remote to use can be
built on top of the RPMSG bus?
Regards,
yf
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