Changes

To hack b2g on the RPi, you'll want to set up a few things. First, a serial console is strongly recommended. (A serial console is basically required for kernel development.) You can purchase a serial-to-USB or serial-port connector for your RPi. Some RPi kits also include one of these. A common serial-to-USB adapter included in RPi kits requires you to connect the black lead to pin 6 (ground), the white lead to pin 8 (GPIO14, UART0_TXD), and the green lead to pin 10 (GPIO15, UART0_RXD). You don't need to connect the red lead if your RPi already has a power source. The b2g kernel is pre-configured to open a serial console for the RPi, so all you need to do is plug the USB cable into your host machine and you start up a terminal emulator. The <code>minicom</code> program works well. On ubuntu, install minicom with the command  sudo apt-get install minicom Then connect to your RPi using the command  minicom -b 115200 -o -D /dev/ttyUSB0 (Replacing <code>/dev/ttyUSB0</code> with the device assigned to your USB-to-serial adapter, if it's not assigned that name.) You should then see console terminal output and get a shell prompt. Note: you must run minicom in a "smart terminal". minicom doesn't work when run inside an emacs shell, and it errors out with a somewhat cryptic message ("No cursor motion capability (cm)").