This how to assumes an installed arm-none-eabi toolchain and GIT. You can refer to e.g. the PX4 wiki for a generic tutorial how to install an arm-none-eabi toolchain (this website uses the same wiki system, so porting back the instructions to this wiki would be welcome).
mkdir nuttx-git cd nuttx-git git clone https://bitbucket.org/nuttx/nuttx.git nuttx git clone https://bitbucket.org/nuttx/apps.git apps
cd nuttx/tools # this step will not provide any output, but copy the configuration to # nuttx-git/nuttx/.config ./configure.sh stm32f4discovery/usbnsh # nsh console/usb - need microUSB to USB cable # or ./configure.sh stm32f4discovery/nsh # nsh console/UART2 - need UART-TTL to USB cable eg FTDI # and return to the nuttx directory cd ..
Now configure with kconfig-frontends:
This will bring up the top-level config screen. The most important setting is the toolchain.
- Build Setup:
- Build host platform: Linux (even on Mac OS that's perfectly fine)
Then exit and save. Now compile:
This will have generated a file called
nuttx, which is an ELF file and can be flashed via SWD / JTAG.
The stm32f4discovery has two usb connectors.
The miniUSB connects to the onboard st-link SWD/JTAG. The stm32f4discovery can be flashed from any host that supports the USB st-link.
The microUSB connects to the STM32F407 OTG-FS port. The NSH console “usbnsh” is only supported on a linux host and doesn't work on Windows as of ver17.13.
arm-none-eabi-gdb nuttx target extended-remote </dev/ttyACM0 on Linux, /dev/tty.usbmodemXXXXXX on Mac OS X, or \\.\COMn on Windows> mon swdp_scan attach 1 load kill
texane st-flash build-tutorial The stm32f4discovery has an onboard st-link(SWD/JTAG) that is accessed by the miniUSB and can be flashed with:
st-flash write nuttx.bin 0x8000000
Alternatively the Windows STM32 ST-Link Utility will also flash it.
If specified “stm32f4discovery/usbnsh” the device is directly available via USB (for linux only systems, doesn't work with Windows USB). To find it on the bus, run either of these commands:
lsusb # or dmesg # then ls /dev/ttyACM*
If the device listed correctly, you can connect via screen:
screen /dev/tty.usbmodem1 # Mac OS # or screen /dev/ttyACM0 # Linux
Default baud rate is 115200 8N1, no HW flow control.
Upon connection, the NSH prompt should be displayed (when not, try hitting Enter three times):
If specified “stm32f4discovery/nsh” then NSH prompt shows immediately on serial console.