Advantech RSB-4410 Manual de usuario descargar pdf (Pagina 47)

39 RSB-4410 User Manual

Chapter 3 Software Functionality

3.8 Linux Software AP and Testing on RSB-4410

This section will guide you how to develop your own application under Linux environ-

ment. First of all, an example “Hello World” will be shown. And then you will see

some pre-installed test programs on RSB-4410 will be introduced in this section

3.8.1 “Hello World!” Application and Execution

This section will guide you how to write a sample application “Hello World”. You can

refer to the following steps:

1. Open "Terminal" on Ubuntu 10.04 LTS.

2. $sudo su (Change to “root” authority)

3. Type user password.

4. Change directory to BSP's scripts folder.

5. #. setenv.sh (To configure the developing environment automatically)

6. #cd ../source

7. #mkdir helloworld (Create your own work directory on the Desktop)

8. #cd helloworld (Enter the work directory)

9. #gedit helloworld.c (Create a new C source file)

Edit the helloworld.c with the following source code:

#include <stdio.h>

void main()

{

printf("Hello World!\n");

}

10. Save the file and exit.

11. #$CC -o helloworld helloworld.c (To compile helloworld.c)

12. Then you can see “helloworld” in current directory.

13. Insert the Linux system SD card to your developing computer.

14. #cp helloworld /media/rootfs/tool (/media/rootfs is the mounted

point of your Linux system SD card)

15. Remove this SD card and insert it to RSB-4410, then open serial console.

16. On RSB-4410 platform, type #root (Login)

17. On RSB-4410 platform, type #cd /tool

18. On RSB-4410 platform, type #./helloworld

19. Now you should be able to see “Hello World!” shown on RSB-4410.

3.8.2 Watchdog Timer Sample Code

WatchDog Timer (WDT) sample code is as below:

#include <stdio.h>

#include <stdlib.h>

#include <fcntl.h>

#include <linux/watchdog.h>

#include <sys/ioctl.h>

#include <unistd.h>

void help_info(void);

int main(int argc, const char *argv[])

{

int fd, timeout, sleep_sec, test;

int count=1;

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Advantech RSB-4410 Manual de usuario Pagina 47

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