2012年8月10日金曜日

Serial Console for Raspberry PI

I created Serial Console for Raspberry PI without soldering.

1.  USB serial cables and jumper wire.
  1.  FTDI chip TTL-232R-3V3, USB to TTL Serial Cable(3.3V)-1.8m (for example, http://akizukidenshi.com/catalog/g/gM-05840/)
  2.  bread board jumper wire (female/male cables)(for example, http://akizukidenshi.com/catalog/g/gP-03471/)
  3. Raspberry PI

2. pin assigment
   If you use another USB serial cable, please check your data sheet of your USB serial cable.






3. cabling sample




I use this Serial cable for FreeBSD/RaspberryPI project.

2012年8月6日月曜日

FreeBSD on Raspberry PI

- Create image file
  - related link http://kernelnomicon.org/ and latest build information(2012/Aug/6)
http://kernelnomicon.org/?p=164

  - I changed build script to
[NEW]
tar -x -v -z –uname root -C /mnt -f freebsd-uboot-sd.tar.gz

  - you need to run build script on root account.

- how to setup serial console(sorry in Japanese):
  http://chicklab.blog84.fc2.com/blog-entry-46.html
and  The layout of the Raspberry Pi GPIOs
 http://elinux.org/RPi_Low-level_peripherals

- TTL level converter
  USB <--> 3.3v RS-232C(in Japanese)
  TTL-232R-3V3 FTDI USB
  http://akizukidenshi.com/catalog/g/gM-05840/
  But pin assign is different from Raspberry PI. you need excange lines.
  I use bread board cable.