Discovery STM32F4 board [Solved]

[paulj]

Evening all - I am trying to get started with the ST32F4 Discovery board. I have set up a cross compiler - arm-none-eabi-*, which has pulled in newlib. I have a simple test program which I am trying to compile, but I am failing with an error "undefined reference to __end__". Is this a function of using newlib? Should I rebuild the toolchain with a different library, or do I need to define __end__?

[theotherjoe]

I started playing with a different STM32 Discovery board some time ago.
To get started I used the Atollic TrueSTUDIO IDE which basically is a souped up
version of Eclipse, but obviously running on winxp or so.
Looked into the possibility to use Linux as a development platform but the
effort to find the proper tools and test them out was to large for the tiny
project I was working on. Havent looked again since

[paulj]

Ok, I have an operational setup in Gentoo, albeit with example code I haven't written. At least I can confirm the tool chain is working. In case anyone else comes across this problem, here is an outline of what I did:

• Code:

  crossdev -t arm-none-eabi

  
  
• I followed through the information at http://quelab.net/wordpress/1598/getting-started-with-the-stm32f4discovery/ Although targeted at Windows, I was able to follow the steps there to get some code to compile (effectively to download chibiOS, a real time OS, and to navigate to the demo directory). The Makefile worked out of the box.
  
• To upload to the board, I fetched stlink from https://github.com/texane/stlink. I ran the configure as a user with a --prefix=/home/paul to avoid polluting the system. I will at some point write an ebuild for this and install it through portage.
  

I was able to upload the demo code without any problems. I can now get down to learn about the board in more detail, and to write my own loader!