4412 Using Xiaodu wifi

FS_4412 can be connected to a USB-Wifi module to achieve wireless Internet access. This section mainly describes how to transplant the driver of the USB-Wifi module and related WPA encryption tools on the FS_4412 development board.

1. Get the RT2780 driver

The USB-Wifi module we use uses the RT2780 chip. The relevant driver source code is in the USB-Wifi_driver directory under the Wifi directory of the Cortex-A9 transplantation section. Or you can download it from the official website and go to http://www.mediatek.com/en/downloads/ to download the required driver

Copy USB-Wifi_driver to the working directory.

Unzip the driver source package

tar -jxvf USB-Wifi_driver.bz2

After decompression, you can see the directory DPO_MT7601U_LinuxSTA_3.0.0.4_20130913

2. Porting RT2780 driver

2.1 Modify Makefile

2.1.1 Modify the Makefile in the DPO_MT7601U_LinuxSTA_3.0.0.4_20130913 directory

viMakefile Modify         #PLATFORM = SMDK
        in line 49         to         PLATFORM = SMDK

Before the change, as shown below

The modified image is as follows:

2.1.2 In line 275, modify the Linux source directory and cross tool chain

275 ifeq ($(PLATFORM),SMDK) 
        276 LINUX_SRC = /home/bhushan/itcenter/may28/linux-2.6-samsung
        277 CROSS_COMPILE = /usr/local/arm/4.2.2-eabi/usr/bin/arm-linux-
        278 endif

Change to

275 ifeq ($(PLATFORM),SMDK)
        276LINUX_SRC = /home/linux/work/4412/linux-3.0-fs4412_V3
        277 CROSS_COMPILE = arm-cortex_a8-linux-gnueabi-
        278 endif

As shown before modification:

After modification, as shown in the figure:

2.1.3 Modify line 1604 in include/rtmp_def.h

Change ra in lines 1604 and 1605 in the above figure to wlan

The changes are as shown below:

2.1.4 View os/linux/config.mk file

Make sure the WPA_SUPPLICANT configuration in the config.mk file is as shown below.

3 Compile the source code

Execute the following command in the DPO_MT7601U_LinuxSTA_3.0.0.4_20130913 directory to compile the source code

make clean
        make -j2

After successful compilation, the following figure is shown

The generated mt7601Usta.ko file is the driver we need

Copy /home/linux/work/4412/DPO_MT7601U_LinuxSTA_3.0.0.4_20130913/os/linux/mt7601Usta.ko to our root file system (the root file system of the development board).

4. Copy the required data file RT2870STA.dat

Create a directory /etc/Wireless/RT2870STA/ in the root file system of the development board (note that this directory is the root file system of the development board)

mkdiretc/Wireless/RT2870STA/ -p

Copy RT2870STA.dat in the source directory (as shown below) to the etc/Wireless/RT2870STA/directory just created

5. Testing

Please make sure the above steps have been completed

5.1 Plug in the USB-Wifi module

Plug the USB-Wifi module into the USB port of the development board, and you can see the following printed information on the port:

Then enter lsusb in the development board

Then modify vim common/rtusb_dev_id.c in the driver source code

Find line 42 and add the IDs you just added. You can actually add all of them. These are the IDs you usually use.

/* module table */USB_DEVICE_ID rtusb_dev_id[] = {
#ifdef RT6570
    {USB_DEVICE(0x148f,0x6570)}, /* Ralink 6570 */#endif /* RT6570 */
    {USB_DEVICE(0x148f, 0x7650)}, /* MT7650 */#ifdef MT7601U
    {USB_DEVICE(0x148f,0x6370)}, /* Ralink 6370 */
    {USB_DEVICE(0x148f,0x7601)}, /* MT 6370 */
    {USB_DEVICE(0x2955,0x1001)}, /* XiaoDu Wifi */#endif /* MT7601U */
    { }/* Terminating entry */};

• Compile make -j2

• Then there is a kernel module in os/linux/mt7601Usta.ko, which is used to load

• Then start wlan0: ifconfig wlan0 up

• To solve the debug output problem, modify the global variable ULONG RTDebugLevel = RT_DEBUG_ERROR; or cancel the DBG macro definition

After transplanting wiconfig, the command used

    iwpriv wlan0 set NetworkType=Infra
    iwpriv wlan0 set AuthMode=WPA2PSK
    iwpriv wlan0 set EncrypType=TKIP
    iwpriv wlan0 set SSID="CMCC-WEIHUA"
    iwpriv wlan0 set WPAPSK=1112223334
    iwpriv wlan0 set SSID="CMCC-WEIHUA"

    iwpriv wlan0 connStatus

 I found that the connection was disconnected, and I don't know why. I think the reasons may be:

1) No DHCP to automatically obtain IP.

2) iwpriv is not configured correctly

3) The driver does not work properly