Moxa UC-7110-LX [20/46] Uc 7101 7110 7112 software architecture

UC-7101/7110/7112 Software User’s Manual Software Package

3-2

UC-7101/7110/7112 Software Architecture

The pre-installed µClinux operating system used by the UC-7101/7110/7112 follows the standard

µClinux architecture, making programs that follow the POSIX standard easily ported to the

UC-7101/7110/7112 by using the GNU Tool Chain provided by www.uClinux.org

. In addition to

the Standard POSIX API, device drivers for the buzzer, and UART for the serial ports are also

included.

The UC-7101/7110/7112’s Flash ROM has multiple smaller partitions for the Boot Loader, Linux

Kernel & Root (/) File System Image, and User Directory.

For most applications, users need to spend a lot time

maintaining the operating system and modifying the

system configuration. In order to save on the total

cost of development and maintenance, the

UC-7101/7110/7112

is specially design to partition a

“User Directory” for storing the user’s system

configuration parameters.

The UC-7101/7110/7112 have a built-in mechanism

that prevents system crashes and improves system

reliability. The procedure is described below.

When the Linux kernel boots up, the kernel mounts the root file system and then enables services

and daemons. The kernel also looks for the system configuration parameters using rc or inittab.

Normally, the kernel uses the User Directory to boot up the system. The kernel will only use the

default configuration _etc & _home when the User Directory crashes.

The UC-7101/7110/7112 uses ROMFS for the Linux kernel image, Root File System, and

Protected configuration, and uses JFFS2 for the User Directory.