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Build environment

0. Work in Progress

In the current project state things might change from time to time. If you actually start developing something for the r0ket now, we'd recommend to join our Mailing List and IRC channel - see contact.

This article explains the setup on a Linux machine. Instructions for Mac OS X are available here.

1. Compiler

The CodeSourcery G++ package provides a GNU cross-compiler toolchain for ARM.
  • On ubuntu, the installer complains that /bin/sh points to /bin/dash and not /bin/bash. Change it like proposed (with 'sudo dpkg-reconfigure -plow dash', “Install as /bin/sh?” → No). You can change it back to dash later, if you like.
  • “Minimal” is the appropriate install option, if you don't want to use the CodeSourcery IDE.
  • add compiler to your path (eg. ~/.bashrc)
    • export PATH=$PATH:<pathtocodesourcery>/Sourcery_G++_Lite/bin/
  • restart console

Complete console commands for Ubuntu: When installing CordeSourcery chose the proposed Paths. Replace <USERNAME> with your username.

mkdir r0ket
cd r0ket
sudo dpkg-reconfigure -plow dash
chmod +x arm-2011.03-42-arm-none-eabi.bin
echo 'export PATH=$PATH:/home/<USERNAME>/CodeSourcery/Sourcery_G++_Lite/bin' >> ~/.bashrc

2. Source

The code for r0ket ist based on the (BSD-licensed) microBuilder-library for the LPC1300-family. High-level functions are provided to print and paint on the display, access the filesystem on the dataflash, the 2.4 GHz RF interface, etc.
  • Install git
    • sudo apt-get install git-core
  • Clone git repository
    • git clone git:// 

3. Build

The source for the actual applications (in opposition to the libraries) resides at 'firmware/applications'. Start from an example or roll your own. APPNAME.c must provide a 'void main_APPNAME(void)' function, which works as the app's main function. The makefile is set up so that you can call 'make APP=APPNAME' to build the firmware image for APPNAME.c. It defaults to 'APP=$USERNAME'
cd firmware
vi applications/hello.c
#include <sysinit.h>
#include "basic/basic.h"
#include "lcd/render.h"
void main_hello(void) {
    DoString(10,20,"Hello World");
    while (1) {}
make APP=hello

4. Deploy

The LPC1343 has a USB-ISP, it can be booted as an USB storage device, and the firmware can be copied as a file. Unfortunately, this only works on Windows. On Linux, the firmware has to be directly written to the device. Additionally, a bug in the ROM causes the CPU to hang for 20 seconds when entering the bootloader. To make development more convenient, the autoflash tool monitors the USB for r0kets in ISP-Mode and automatically flashes the last built firmware. An “ISPAndReset()”-function in the library enables the user to reset the r0ket to ISP-mode and circumvent the 20 second delay.
  • Install udev rule
    • sudo cp tools/bootloader/42-nxp-flash.rules /etc/udev/rules.d/
      sudo /etc/init.d/udev restart
  • start autoflasher
    • cd firmware
      make flash APP=hello 
On ubuntu, nautilus will automount the USB-Storage device, and our automouter will not work. Disable the nautilus-automounter:
apps > nautilus > preferences
Uncheck the "media_automount" option
  • (re)start r0ket in ISP-mode
    • Method 1 (up to 30 seconds, but works always)
      • Power off r0ket
      • Press and hold button “Left”, power r0ket on
      • Connect r0ket via USB
    • Method 2 (fast, works always when a firmware is installed that uses [default])
      • Power off r0ket
      • Press and hold button “Enter”
      • Connect r0ket via USB
    • Method 3 (fast, works if installed firmware provides the functionality)
      • Connect r0ket via USB
      • Select menu option “Invoke ISP” (or similar)
If the r0ket is in ISP-mode, all four LEDs are dimly lit
build.1312618520.txt.gz · Last modified: 2011/08/06 10:15 by jomat