Embest AM3517 User Manual download pdf (Page 47)

3.4.3.3 Test

Update kernel image file ulmage in SD card, copy file g_file_storage.ko to the SD card and reboot

the system from SD. Execute the following commands to stimulate the SOC8200 into usb mass

storage device for PC’s visit:

root@DevKit8000:~# mount –t vfat /dev/mmcblk0p1 /mnt

root@DevKit8000:~# cd /mnt

root@DevKit8000:/mnt# insmod g_file_storage.ko file=/dev/mmcblk0p1 stall=0 removable=1

g_file_storage gadget: File-backed Storage Gadget, version: 7 August 2007

g_file_storage gadget: Number of LUNs=1

g_file_storage gadget-lun0: ro=0, file: /dev/mmcblk0p1

musb_hdrc musb_hdrc: MUSB HDRC host driver

musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 2

usb usb2: configuration #1 chosen from 1 choice

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Use the USB line (USB mini B to USB A) to connect the development board and PC, PC will give

a hint that usb mass storage device is found; a new mobile hard disk is found and users can

perform operation for it.

3.4.4 The Development Of Application

This section will introduce how to conduct the development of application on the SOC8200

hardware platform, including the formation of SOC8200 software environment. Examples will be

taken to show the general process of the development of SOC8200 application.

3.4.4.1 LED application development

1.Coding

Led_acc.c source code, The led lamps in the development board will flash.

#include <stdio.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/ioctl.h>

#include <fcntl.h>

Please make sure that the kernel image has been updated, otherwise, module

g_file_storage.ko will fail to load and the similar tips will show:

insmod: cannot insert '/media/mmcblk0p1/g_file_storage.ko': Device or resource

busy

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Embest AM3517 User Manual Page 47