STM32L151 bare bones Makefile project

This is a basic STM32L151RB project using the GNU toolchain. It can be modified to run on STM32L152. Features:

• make-based build system
• Startup code from ST
• Linker script from ST
• STM32L1xx standard peripheral drivers library
• SEGGER RTT (debug terminal-over-JTAG) code
• Handy hard fault handler for debugging

How to run

1. Download the GNU ARM Embedded toolchain, extract anywhere and add the bin directory to your $PATH
2. Simply type make
3. Load main.elf with your JTAG adapter. I highly recommend using J-Link and Ozone.
4. The application will print a hello message in RTT console.
5. Default clock configuration code will try to use a high-speed external crystal (HSE) but will fallback to internal 2.1MHz clock if that one fails.

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