Marco Casaroli
7f6a0a30da
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>
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
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