UM1535 datasheet(24/39 Pages) STMICROELECTRONICS

24 / 39 page

Working at application level (userland)

UM1535

24/39

Doc ID 023036 Rev 2

# service portmap start

Starting portmap: [ OK ]

followed by the command:

# service nfs start

Starting NFS services: [ OK ]

Starting NFS quotas: [ OK ]

Starting NFS daemon: [ OK ]

Starting NFS mountd: [ OK ]

Each time you change this file when the NFS service is already started, you need either to

restart it or to force the NFS daemon to reload the new configuration:

# exportfs -a

4.1.2

Incremental changes to Flash file system

If the root file system is stored on Flash memory, it is possible to transfer files from the PC to

the target board in the following ways:

●

Transfer by USB pen drive

●

Transfer by MMC/SD card

●

Transfer by LAN (TFTP)

4.1.3

Flash file system full replacement

To replace the entire file system on Flash memory, you can:

●

Rewrite the root file system partition with the USB Flasher tool

●

Rewrite the root file system partition from U-Boot

●

Rewrite the root file system from Linux by overwriting the mtdblock of the file system

4.1.4

Setting environment variables for using NFS boot

The following U-Boot commands set up environment variables for using the NFS file system:

u-boot>setenv bootargs root=/dev/nfs rw console=ttyAMA0,115200

nfsroot=192.168.1.1:/opt/STM/STLinux-2.4/devkit/armv7/target,udp

ip=192.168.1.10:192.168.1.1:192.168.1.1:255.255.255.0::eth0

These commands exports the /opt/STM/STLinux-2.4/devkit/armv7/target directory from the

host machine (IP address 192.168.1.1) to the target board (IP address 192.168.1.10); the

gateway address used is 255.255.255.0.

4.2

Command line cross-development

The most important item concerning host packages is the cross-development toolchain, a

set of programs running on a host PC, but targeting ARM-specific code output with support

for:

●

Cross-compilation of source code to generate native object code for the ARM CPU

cores integrated into SPEAr embedded MPU family

●

Cross-linking of ARM object code to generate executable programs or (dynamically

linkable) shared libraries

●

Managing object code archives, incremental rebuilding and other auxiliary tasks

UM1535 датащи(PDF) 24 Page - STMicroelectronics

UM1535 датащи(HTML) 24 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

датащи скачать

ссылки URL