On Sun, Feb 21, 2021 at 11:25 AM Gregory Nutt <spudan...@gmail.com> wrote: > > > > ... Using > > the pinguino toolchain, 2 LEDs now light up, and the debugger at least > > thinks that we're in the up_idle function, so that looks promising. > > After switching the serial console to UART2(for the explorer16), I do > > now get data out of the serial port! The last message that I see is > > "nx_start: CPU0: Beginning Idle Loop". Nothing else is happening > > though - I was expecting to get some kind of shell, as USER_ENTRYPOINT > > is set to "nsh_main". > > That means that the OS bring-up completed without error but something > failed while starting the application. Perhaps the memory is still > configured wrong or perhaps the NSH stack size is too small. It is > impossible to diagnose without debugging. > > I would put a breakpoint on nsh_main and see if it gets there. >
Robert I did a quick verification via a qemu based simulator that I was able to run nsh. I did find a couple things. One was a invalid register write for port K https://github.com/apache/incubator-nuttx/pull/2886 The other more concerning one was that when I did not build with the debug features enabled I had what the simulator at least thought was an invalid hex file with an entry starting on an odd address: ❯ ./mipsel-softmmu/qemu-system-mipsel \ -machine pic32mz-explorer16 \ -nographic -monitor none \ -serial stdio \ -kernel ~/nuttx/wrk/nuttx/nuttx.hex -S -s Board: Microchip Explorer16 Processor: microAptivP RAM size: 512 kbytes /home/bashton/nuttx/wrk/nuttx/nuttx.hex: odd address Note that I was abusing a different config "pic32mz-starterkit:nsh" and I had to make a few tweaks including disabling CONFIG_MIPS_MICROMIPS and I believe there also may be a limitation in the simulator around SRSCtl that I also hacked around. I don't have an actual Microchip Explorer16/32 which it sounds like you are working on, but if you were to put a draft PR up or point me at a branch I would be happy to try to run this against the simulator and see if we can get a little further. This is the simulator I was using https://github.com/sergev/qemu/wiki I did have to make a few changes to get it to build with a modern gcc/glibc --- a/hw/9pfs/virtio-9p.c +++ b/hw/9pfs/virtio-9p.c @@ -22,6 +22,8 @@ #include "trace.h" #include "migration/migration.h" +#include <sys/sysmacros.h> + int open_fd_hw; int total_open_fd; ./configure --target-list=mipsel-softmmu --python=/usr/bin/python2 --disable-werror make
