[radio] ot-daemon cannot start with nRF52840 RCP device.

[wgtdkp]

Starting ot-deamon fails with RadioSpinelNoResponse when using the nRF52840 DK as a RCP device.

• ot-daemon/openthread commit: 87e6cf59913a9b247086a81f3d4c58205bc34725
• ot-nrf528xx commit: b00c50f

Steps to reproduce:

1. Build nRF52840 RCP (DK):

cd ~/ot-nrf528xx
./script/build nrf52840 UART_trans -DOT_SRP_CLIENT=1 -DOT_ECDSA=1

2. Build ot-daemon:

cd ~/openthread
cmake -S . -B build -GNinja -DOT_PLATFORM=posix -DOT_THREAD_VERSION=1.2 -DOT_COMMISSIONER=ON -DOT_BORDER_AGENT=ON -DOT_JOINER=ON -DOT_SRP_SERVER=ON -DOT_ECDSA=ON -DOT_SERVICE=ON -DOT_DAEMON=ON -DOT_BORDER_ROUTING=ON -DOT_BORDER_ROUTER=ON -DOT_DAEMON=ON -DOT_BORDER_AGENT=ON -DOT_COMMISSIONER=ON -DOT_REFERENCE_DEVICE=ON -DOT_FULL_LOGS=ON

3. Start ot-daemon and fail:

sudo ./build/src/posix/ot-daemon -d 6 -v -B wlan0 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=115200'
./build/src/posix/ot-daemon[25914]: Running OPENTHREAD/20200818-00989-g87e6cf599; POSIX; Jun  7 2021 11:46:00
./build/src/posix/ot-daemon[25914]: Thread version: 3
./build/src/posix/ot-daemon[25914]: [DEBG]-MAC-----: Idle mode: Radio sleeping
./build/src/posix/ot-daemon[25914]: [DEBG]-PLAT----: Wait response: tid=2 key=2048
./build/src/posix/ot-daemon[25914]: [CRIT]-PLAT----: HandleRcpTimeout() at ../src/lib/spinel/radio_spinel_impl.hpp:2190: RadioSpinelNoResponse

[jwhui]

@wgtdkp , I was able to start ot-daemon successfully with the steps you provided.

Did you disable Mass Storage Device?

[wgtdkp]

@wgtdkp , I was able to start ot-daemon successfully with the steps you provided.

Did you disable Mass Storage Device?

@jwhui Thanks! It is exactly the Mass Storage Device issue. The daemon works perfectly after disable it!