net: ot: OpenThread HOST to RCP communication via UART #82926
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rlubos
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Dec 12, 2024
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Some nits, but overall looks good. Thanks for the contribution!
jukkar
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Dec 16, 2024
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December 19, 2024 12:02
…(UART) This config allows setting up the echo_client program with RCP HOST UART (via SPINEL protocol) communication. Signed-off-by: Lukasz Majewski <[email protected]>
…ART) This overlay configures the imxrt1020 EVK board to use its lpuart2 serial port to communicate with other board (in this case nRF21540-DK), which is the RCP for OpenThread protocol. The nRF Zephyr RCP is the one from Nordic (v2.7.0): west build -p always -b nrf21540dk/nrf52840 -S logging nrf/samples/openthread/coprocessor The same UART (on nRF) can be used for testing/debugging purposes with using the ot-cli's SPINEL communication program: sudo ./build/posix/src/posix/ot-cli 'spinel+hdlc+uart:///dev/ttyACM1?u art-baudrate=1000000' --verbose Signed-off-by: Lukasz Majewski <[email protected]>
This patch adds support for HOST OpenThread communication to the RCP co-processor via UART using SPINEL protocol. The aim is to use OpenThread's RCP (Radio Co-Processor) with HOST device (for example imxRT1020). Such configuration is the same as one used with PC program (ot-cli) and RCP. Signed-off-by: Lukasz Majewski <[email protected]>
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This description provides information about setting up RCP (nRF21540-DK) and OT HOST (mimxrt1020_evk) to communicate with HOST PC's echo_server via OpenThread Border Router (OTBR). Signed-off-by: Lukasz Majewski <[email protected]>
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rlubos
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This patch set is in some sense the follow up for #75986 - however it is much simpler as it uses UART (serial port) to communicate via SPINEL protocol with RCP device.
This patch set is agnostic to architecture on which it is running - i.e. it uses Zephyr's API for serial port communication (NXP has for example
SerialManagerprogram in their HAL).The OpenThread's RX callback is called from a system based workqueue after the serial IRQ is served.
Used HW:
west build -p always -b nrf21540dk/nrf52840 -S logging nrf/samples/openthread/coprocessorfrom Nordic SDKAnother nRF21540-DK with (ot-cli) is used as RCP for PC controlled setup to check if OpenThread's communication works as expected.
The
echo_clientprogram has been used with proper DTS and configuration overlays.west build -p always -b mimxrt1020_evk samples/net/sockets/echo_client -- -DCONF_FILE="prj.conf overlay-ot-rcp-host-uart.conf"Following code can be used to check if the communication works correctly:
Lider/Commissioner (ot-cli):(nRF21540-DK)
dataset init newdatasetdataset commit activeifconfig upthread startcommissioner startcommissioner joiner add * J01NMEChild:(imxrt1020-evk)
ot factoryresetot ifconfig upot joiner start J01NMEot thread startnet ping -c 10000 fdc2:f018:d073:9b12:0:ff:fe00:fc00