User`s manual
IA260/IA261/IA262/EM-2260 Linux User’s Manual Programmer’s Guide
Flash Memory Map
Partition sizes are hard coded into the kernel binary. To change the partition sizes, you will need to
rebuild the kernel. The flash memory map is shown in the following table.
Address Size Contents
0x00000000 – 0x0005FFFF 384 KB Boot Loader—Read ONLY
0x00040000 – 0x002FFFFF 2.75 MB Kernel object code—Read ONLY
0x00300000 – 0x00FFFFFF 13 MB Root file system (JFFS2) —Read ONLY
0x01000000 – 0x01FFFFFF 16 MB User directory (JFFS2) —Read/Write
Mount the user file system to /mnt/usrdisk with the root file system. Check to see if the user file
system was mounted correctly. If the user file system is okay, the kernel will change the root file
system to /mnt/usrdisk. If the user file system is not okay, the kernel will use the default Moxa
file system. To finish the boot process, run the init program.
NOTE 1. The default Moxa file system only enables the network and CF. It lets users recover the user
file system when it fails.
2. The user file system is a complete file system. Users can create and delete directories and
files (including source code and executable files) as needed.
3. Users can create the user file system on the PC host or target platform, and then copy it to
the IA260/IA261/IA262/EM-2260.
Device API
The IA260/IA261/IA262/EM-2260 supports control devices with the ioctl system API. You will
need to
include <moxadevice.h>
, and use the following ioctl function.
int ioctl(int d, int request,…);
Input: int d - open device node return file handle
int request – argument in or out
Use the desktop Linux’s man page for detailed documentation:
#man ioctl
RTC (Real Time Clock)
The device node is located at /dev/rtc. The IA260/IA261/IA262/EM-2260 supports Linux
standard simple RTC control. You must
include <linux/rtc.h>
.
1. Function: RTC_RD_TIME
int ioctl(fd, RTC_RD_TIME, struct rtc_time *time);
Description: read time information from RTC. It will return the value on argument 3.
2. Function: RTC_SET_TIME
int ioctl(fd, RTC_SET_TIME, struct rtc_time *time);
Description: set RTC time. Argument 3 will be passed to RTC.
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