STW TC1, User Manual

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6 Software
User Manual 70/374
Example: Read out EEPROM
Displays in two byte hexadecimal by using /usr/bin/hexdump.
# hexdump -x /sys/bus/i2c/devices/0-0054/eeprom
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
..
0002000
Display canonical hex+ASCII, 16 byte per line.
# hexdump -C /sys/bus/i2c/devices/0-0054/eeprom
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
..
00002000
Low Level Hardware Access
Path Input information Output information Description
/proc/mtd - List of devices to
partition parameters This user space interface includes
the device and partition information of
the system.
/proc/cmdline - - This user space interface includes
the command line parameters which
the kernel itself was booted.
Example:
Read device and partition information
# cat /proc/mtd
dev: size erasesize name
mtd0: 03700000 00020000 "rootfs"
mtd1: 00800000 00020000 "kernel"
mtd2: 00040000 00020000 "u-boot"
mtd3: 00020000 00020000 "u-boot-env"
mtd4: 000a0000 00020000 "fdt"
mtd5: 000a0000 00020000 "reserved"
mtd6: 40000000 00020000 "nand-flash"
Get command line parameters. Parameter ubi.mtd=0 indicates to which mtd block the file system is mounted to.
# cat /proc/cmdline
console=ttyPSC3,115200 ubi.mtd=0 root=ubi0:rootfs rw rootfstype=ubifs quiet
ip=192.168.4.253:192.168.4.204::255.255.255.0::eth0:off panic=1