[[!meta title="NetBSD/evbarm on Hardkernel ODROID-C1"]]
[[!toc levels=2]]
# Supported hardware
- CPU: Cortex-A5: S805 (4-core) at 1.5GHz
- CPU frequency scaling is supported with machdep.cpu sysctl tree
- SMP supported
- PL310 L2 cache controller
- GIC
- A5 watchdog timer
- A5 global timer
- SD/MMC controller (DMA)
- Serial console
- USB host (OTG)
- Gigabit Ethernet (GMAC)
- RTL8211F PHY
- Hardware random number generator
# TODO
- USB device mode
- Simultaneous SD card and eMMC usage
- SD/MMC UHS-I support (needs sdmmc(4) changes)
- HDMI / framebuffer
- IR receiver
- GPIO
- I2C
# Installation
* Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *beagleboard.img*
* Build U-Boot for ODROID-C1 <https://github.com/hardkernel/u-boot/tree/odroidc-v2011.03>
* Pre-built binaries here: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/u-boot-odroidc-v2011.03-20150308.tar.gz>
* Note the location and size of the FFS partition in the *beagleboard.img* disklabel:
[[!template id=programlisting text="""
# $TOOLDIR/bin/nbdisklabel -M evbarm -B le beagleboard.img
...
8 partitions:
# size offset fstype [fsize bsize cpg/sgs]
a: 1359312 385024 4.2BSD 0 0 0 # (Cyl. 188 - 851*)
b: 262144 122880 swap # (Cyl. 60 - 187)
c: 1744336 0 unused 0 0 # (Cyl. 0 - 851*)
d: 1744336 0 unused 0 0 # (Cyl. 0 - 851*)
e: 114688 8192 MSDOS # (Cyl. 4 - 59)
"""]]
* Write the bootloader to the empty space at the start of the base image:
[[!template id=programlisting text="""
# dd if=bl1.bin.hardkernel of=beagleboard.img bs=1 count=442 conv=notrunc
# dd if=bl1.bin.hardkernel of=beagleboard.img bs=512 skip=1 seek=1 conv=notrunc
# dd if=u-boot.bin of=beagleboard.img bs=512 seek=64 conv=notrunc
"""]]
* Since the bootloader has overwritten the disklabel, we need to re-add partition "a" from the disklabel to the MBR partition table:
[[!template id=programlisting text="""
# $TOOLDIR/bin/armv7--netbsdelf-eabihf-fdisk -u beagleboard.img
...
Which partition do you want to change?: [none] 1
The data for partition 1 is:
<UNUSED>
sysid: [0..255 default: 169]
start: [0..109cyl default: 63, 0cyl, 0MB] 385024
size: [0..85cyl default: 1359312, 85cyl, 664MB] 1359312
...
Which partition do you want to change?: [none]
...
Should we write new partition table? [n] y
"""]]
* Write the image to an SD card.
* Copy the kernel (netbsd.ub) for your board to the root of the MS-DOS partition on the SD card.
* Create or edit boot.ini on the MS-DOS partition:
[[!template id=programlisting text="""
ODROIDC-UBOOT-CONFIG
setenv m "1080p"
setenv vout_mode "hdmi"
setenv m_bpp "32"
setenv disableuhs "disableuhs"
setenv bootargs "root=ld0f awge0.mac-address=${ethaddr}"
setenv bootcmd "fatload mmc 0:1 0x21000000 netbsd.ub; bootm 0x21000000"
run bootcmd
"""]]
* On first boot, it will stop because of the wrong device in /etc/fstab. Take this opportunity to grow the root file-system:
[[!template id=programlisting text="""
# fdisk -u ld0
...
Which partition do you want to change?: [none] 1
The data for partition 1 is:
NetBSD (sysid 169)
start 385024, size 1359312 (664 MB, Cyls 23/246/32-108/147/55)
PBR is not bootable: All bytes are identical (0x00)
sysid: [0..255 default: 169]
start: [0..966cyl default: 385024, 24cyl, 188MB]
size: [0..942cyl default: 1359312, 85cyl, 664MB] $
...
Which partition do you want to change?: [none]
...
Should we write new partition table? [n] y
# resize_ffs -y /dev/rld0f
# reboot
"""]]
* Next boot, create a new /etc/fstab:
[[!template id=programlisting text="""
# mount -u -o rw /dev/ld0f /
# cat > /etc/fstab << EOF
/dev/ld0f / ffs rw 1 1
/dev/ld0e /boot msdos rw 1 1
kernfs /kern kernfs rw
ptyfs /dev/pts ptyfs rw
procfs /proc procfs rw
tmpfs /var/shm tmpfs rw,-m1777,-sram%25
EOF
# reboot
"""]]
# ODROID-C1 UART pins
From [ODROID Forum](http://forum.odroid.com/viewtopic.php?f=115&t=7684):
[[!template id=programlisting text="""
___UART____
|Pin 4 - GND|
|Pin 3 - RXD|
|Pin 2 - TXD|
|Pin 1 - VCC|
\___________|
3.3V LVTTL
"""]]
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