nuttx

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Marco Casaroli 7f6a0a30da boards/arm/stm32l4/b-l475e-iot01a: Add a QEMU nsh configuration.

QEMU's b-l475e-iot01a machine models the STM32L4x5 core peripherals, but
not the QUADSPI controller or the on-board MX25R6435F flash.  The nsh
configuration therefore panics during board bring-up, inside
stm32_qspi_initialize() -> mx25rxx_initialize() -> qspi_command(), before
the console has produced any output.

Add a qemu configuration that is nsh without CONFIG_B_L475E_IOT01A_MTD_FLASH
and the QSPI/MTD/SMARTFS chain that symbol selects.  It boots to an NSH
prompt on USART1 under:

  qemu-system-arm -M b-l475e-iot01a -nographic -kernel nuttx

Document the new configuration, including the fact that QEMU's STM32L4x5
USART model never calls qemu_chr_fe_accept_input() after the guest reads
RDR.  Console input consequently stalls after the first byte or two when a
line is pasted or piped in, although typing at human speed works.

Assisted-by: Claude Code:claude-opus-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

2026-08-10 22:46:31 +08:00