Windows or minicom in Linux. The execution flow could be consequently
observed from the kernel booting up messages by RS232 terminal which
was communicated with the console port on PCM-7130, if the result was
subsequently success, then the developing loop would end, if not, then the
source code need to be modified or fixed. After the modification was done
then go to the compilation step.
The other was application loop. The binary files of applications need to
copy to NFS (Network File System) root file directory after the applications
compilation; the applications could be executed on the embedded system by
console port (the 3-2-2 would explain it), and the execution flow could be
then observed from the application execution message via RS232 terminal, if
the result was success, then the develop loop would end, if not, then the
source code need to to modified or fixed. After the modification was done
then go to the compilation step.
3-2 Linux Kernel and Drivers
3-2-1 Linux Kernel, Ramdisk, Bootloader
Linux kernel, available for many architectures, is an good candidate for
an embedded system, and it already is used widely in this area. Its open
nature makes it particularly attractive to developers.
The ADVANTECH produced PCM-7130 and provided the
corresponding Linux kernel of version 2.4.18-rmk3. The kernel includes
important components which are the IO drivers of PCM-7130; therefore, the
IO of PCM-7130 could easily to be used by developers. However, the
options of Linux kernel still need to be modified, because the original Linux
kernel does not enable sufficient IOs. Thus, it would be enabled when the IO
requirements the kernel source. This would be discussing in the following
chapter.
The compilation and running flows of Linux kernel in PCM-7130 is
described in this section.
Compiling the Linux kernel
z The Linux kernel need to be compiled after the kernel options was
changed or the source code was modified.
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