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arm-none-eabi
datasheets
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README.md

README.md

#Minimalist bare metal programming from scratch

##Background The contents of this directory are based on the STM32F4-Discovery. The development host is based on Linux. Minimalist means that I use as few and simple tools as possible to write code, store code to the board, and test the code (GNU suite, Vim, GNU make, GDB, etc.). The approach is bottom/up, i.e. using the board resources as much as possible rather than trying to achieve some particular functional goals. The purpose is learning and creating a clean, simple and effective code base.

##Tools used As of this commit, the tools I use in the bare project are:

  • Host: Xubuntu
  • Target: STM34F4-Discovery + mini USB cable
  • On chip debugger: Open On-Chip Debugger 0.8.0 (openOCD)
  • IDE: Vim + GNU Make 4.0 + GNU gdb (GNU Tools for ARM Embedded Processors)
  • ARM cross toolchain: GNU Tools for ARM Embedded Processors

##Tips

  • I find the command "arm-none-eabi-objdump -d binary" invaluable to check that the binary has the correct layout or understand what the compiler is doing.
  • I use directives in .gdbinit to ease gdb's startup and automate openOCD's start and connection (see code, I have symbolic links to these file in my home directory). I very often use the following commands under gdb:
    • monitor reset halt (ask OpenOCD to reset the target)
    • load (write the binary to flash).
    • continue (run the program to the next breakpoint or until I break)