See https://lupyuen.github.io/articles/pinedio2
NuttShell (NSH) NuttX-10.2.0-RC0
nsh> ls /dev
/dev:
console
gpio0
gpio1
gpio2
i2c0
lcd0
null
spi0
spitest0
timer0
urandom
zero
nsh> ?
help usage: help [-v] [<cmd>]
? cat help ls uname
Builtin Apps:
bas lorawan_test spi_test
bl602_adc_test lvgldemo spi_test2
getprime lvgltest sx1262_test
gpio nsh timer
hello sensortest tinycbor_test
ikea_air_quality_sensor sh
nsh> uname -a
NuttX 10.2.0-RC0 4ea16dc Apr 5 2022 18:25:59 risc-v bl602evb