Very everyone, It seems like some recent modification in the mainline generated some bad side effects, none command is working. I'm pretty sure everything was working yesterday!
If you have a Bluepill board you can try to reproduce it this way: $ git clone https://github.com/apache/nuttx-apps apps $ git clone https://github.com/apache/nuttx $ cd nuttx $ ./tools/configure.sh stm32f103-minimum:usbnsh $ make -j $ sudo openocd -f interface/stlink-v2.cfg -f target/stm32f1x.cfg -c init -c "reset halt" -c "stm32f1x unlock 0" -c "reset halt" -c "flash write_image erase nuttx.bin 0x08000000" Reset the board and connect to /dev/ttyACM0 @ 115200 8n1 NuttShell (NSH) NuttX-12.4.0 nsh> help nsh> uname -a nsh> ls /dev nsh> No error, no output, nothing, only the prompt still alive! This is another call for a CI Hardware Testing!!! Best Regards, Alan