User:SamuelM

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whoami

• Name:

Samuel MARTIN

• Background:

Student at ESEO (French engineering school), specialised in Embedded systeme and Automation /

Master student at l'University of Plymouth (UK), in Robotics.

Embedded and System Engineer (Paris, France)

Interests

• Robotics
• Computer Vision
• Image & signal processing
• Linux

Objectives

or, what I wanna do with the APF board (APF27 + Devfull)

• Have fun!
• Improve my skills in:
  • Hardware development (FPGA)
  • System and embedded OS
  • Electronic development
  • Software development for embedded (tiny) target
• Share my experiments

Contributions

Cross-compile OpenCV for your APF

CMake

Tips

A colored (and useful) prompt

zsh and ctafconf users won't be lost ;-)

##
## ~/.profile
##
source /etc/profile

## Enhanced promt
if [ -t 0 ]; then
  bldblk='\033[1;30m' # Black - Bold
  bldred='\033[1;31m' # Red
  bldgrn='\033[1;32m' # Green
  bldylw='\033[1;33m' # Yellow
  bldblu='\033[1;34m' # Blue
  bldpur='\033[1;35m' # Purple
  bldcyn='\033[1;36m' # Cyan
  bldwht='\033[1;37m' # White
  txtrst='\033[0m'    # Text Reset
  undred='\033[4;31m' # Red - Underlined
  bgdred='\033[1;41m' # Red - Background
  bgdblu='\033[1;44m' # Blue - Background
fi;
if [ $(id -u) -eq 0 ]; then
  userbgd="${bgdred}"
else
  userbgd="${bgdblu}"
fi

export PS1="${userbgd}\u${bldylw}@${bldgrn}\h${txtrst} ${bldpur}[\$(eval \"res=\$?\"; [ \${res} -eq 0 ] && echo -en \"\${bldwht}\${res}\" || echo -en \"\${bldred}err \${res}\")${bldpur}] [${bldblu}\w${bldpur}] ${txtrst}\n\${SHELL:5}${bldgrn}\$${txtrst} "

u-boot configuration

1. nfs-boot (kernel and rootfs), if the nfs server is alive
2. boot from the NAND flash, otherwise

u-boot environment

BIOS> setenv nfsboot 'setenv bootargs ${console} ${mtdparts}; \
 run addnfsargs addipargs; \
 setenv autostart yes; \
 nfs ${loadaddr} {serverip}:${rootpath}/${board_name}-linux.bin; \
 bootm'
BIOS> setenv addnfsargs 'setenv bootargs ${bootargs} root=/dev/nfs rw nfsroot=${serverip}:${rootpath}'
BIOS> setenv addipargs 'setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off'
BIOS> setenv bootcmd 'if ping ${serverip}; then \
  echo; \
  echo Boot over NFS; \
  echo; \
  run nfsboot; \
 else \
  echo; \
  echo Boot from the board;  \
  run jffsboot; \
 fi'
BIOS> setenv board_name apf27
BIOS> setenv netmask 255.255.255.0
BIOS> setenv serverip 192.168.10.2
BIOS> setenv gatewayip 192.168.10.1
BIOS> setenv ipaddr 192.168.10.10
BIOS> setenv rootpath /path/to/where/you/untar/your/rootfs
BIOS> saveenv
BIOS> boot

Adjust the bootdelay if needed.

Next boot will automatically try to boot over NFS, then fallback on the NAND flash

Warning: If the NFS server is alive, but neither the linux kernel image nor the rootfs are NOT at the expected location: /path/to/where/you/untar/your/rootfs, the boot will hang up, so booting will fail !

NFS server configuration

Refer to the NFS wiki page to setting the NFS server up.

Then:

• untar the rootfs tarball in /path/to/where/you/untar/your/rootfs
• copy the linux kernel image to /path/to/where/you/untar/your/rootfs

sudo tar xvf apf27-rootfs.tar -C /path/to/where/you/untar/your/rootfs
sudo -fv cp apf27-linux.bin /path/to/where/you/untar/your/rootfs