Compiling without LPCXpresso

We need the gcc-arm-none-eabi compiler, for example in Ubuntu:

sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
sudo apt-get update
sudo apt-get install gcc-arm-none-eabi

And then run

make

Flashing in Linux

The makefile has a target to download and build the lpc21isp utility from sourceforge. Just run

make flash

and it wil be downloaded and compiled for you.