STM32F4Discovery, NuttX, ARM-Cortex development on GNU/Linux....

[Gert van den Berg]

Found some time to play with my STM32F4Discovery...

Getting it to work on Arch was interesting...

Eventually settled on these packages for compiler, STLink, Debugger:

Compiler: https://aur.archlinux.org/packages/arm-none-eabi-gcc/

GDB: https://aur.archlinux.org/packages/arm-none-eabi-gdb/

STLink (For GDB): https://www.archlinux.org/packages/community/x86_64/openocd/

Other useful things: 

For flashing via on-chip bootloader: https://aur.archlinux.org/packages/stm32blctl-git/ (No success yet...)

Alternative STLink interface: https://aur.archlinux.org/packages/stlink-git/ (Seem to also work with GDB...)

I mainly used this tutorial to get it running in Eclipse:

http://embeddedprogrammer.blogspot.com/2012/09/stm32f4discovery-development-with-gcc.html 

Needed to modify the GDB scripts not to enable flash protection after flashing... (I had to boot into Windows and use the ST-Link tool to disable it...) (Haven't tried stlink-git from above yet...)

The NuttX was simpler to configure (at least for a basic compile) than I expected... Mainly followed this:

http://nuttx.org/doku.php?id=wiki:howtos:build-and-install-nuttx-for-the-lm3s6965-ek-in-linux (Use a STM32F4 example, usbnsh allows you to actually see if it works...) Also, do not bother with buildroot, the GCC for above works...

Next steps: 

1. Get an actual useful NuttX application running... http://www.zilogic.com/blog/tutorial-nuttx-hello.html seem to be useful...
   
2. Figure out the make / flash process for embedded systems (WHY is GDB involved in flashing?! What is this bin file? IT seem to be ELF, probably using normal loading instructions as flashing instructions.... How does it get linked? What goes into the linking...)
3. Figure out how to properly configure NuttX
4. Try to get NuttX to build from Eclipse
5. Get NuttX running on some other hardware (Arduino Mega maybe)
6. See if same NuttX applicaiton runs on both
7. Figure out NuttX HAL (for simple peripherals first...)
8. Possibly get some more of the STM32* discovery boards running (I also have F3, F0, VL...)
9. Do something useful with it...
10. Figure out another RTOS (FreeRTOS / scmRTOS / Chibios / eCos all seem interesting...)
    
    

Things that I struggled with more than I should:

Compiling a toolchain with crosstool-ng, when the AUR package seems to work fine...

Gert

[Schalk Heunis]

Thanks, I was really impressed with the demo you showed last night.

Could also be interesting to see it running on the Arduino DUE (I have one, and to date have only blinked one of its LED's)

S

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[Gert van den Berg]

On Wednesday, September 25, 2013 5:51:20 PM UTC+2, Skullkey wrote:

Thanks, I was really impressed with the demo you showed last night.

Could also be interesting to see it running on the Arduino DUE (I have one, and to date have only blinked one of its LED's)

They actually have NuttX running on it...

http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/arduino-due/README.txt

Gert

[Gert van den Berg]

KiCAD schematic of headers, with indication of which on-board features also use that pin... (pins to avoid when You want that on-board feature...)

Might need libraries from here in ../libkicad: http://smisioto.no-ip.org/elettronica/kicad/kicad-en.htm

Gert

[Andre Maree]

Hi Gert,

New to Nuttx, Eclipse and the STM32 platform. Needs a bit of help getting Nuttx to build under Eclipse.

Any chance you can advise?

Andre

[Gert van den Berg]

Normal make seems to be the way to go with nuttx... It has a Linux kernel like build system...

The biggest challenge seem to be to get A working arm tool chain...

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