Transplantation of USB WiFi module rt3070 driver on the Apsara stack E9 Platform

Due to project work requirements, point-to-point and multi-point transmission of wifi must be implemented on the embedded E9 platform.

WiFi module chip: Reiling 3070 Chip

Embedded platform: E9 (ARM)

Cross-compilation environment: Arm-None-Linux-gnueabi

1. First download the driver for the Wi-Fi module

2. Cross-compile the driver

A. open the file after decompression of the driver file. If you need WPA and other functions, you can enable./OS/Linux/config. mk for editing. If you do not need to directly go to step B

B. Open the makefile in the root directory of the driver file and modify it. First, change chipset to 3070.

Then configure the cross-compilation environment. The default platform is PC. we modify the PC Code as follows:

ifeq ($(PLATFORM),PC)# Linux 2.6LINUX_SRC = /opt/E9_CD/Linux/linux_E9_3.0.35_for_Linux# Linux 2.4 Change to your local setting#LINUX_SRC = /usr/src/linux-2.4LINUX_SRC_MODULE = /opt/E9_CD/Linux/linux_E9_3.0.35_for_Linux/drivers/net/wireless/CROSS_COMPILE = /opt/Embedsky/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/tq-linaro-toolchain/bin/arm-none-linux-gnueabi-endif

Save and run sudo make
Linux_e9_3.0.35 is the directory where the Linux kernel source code is located.

3. After compilation, copy rt2870sta. dat and rt30870.sta. KO in the root directory to the board.

mkdir –p /etc/Wireless/RT2870STA/cp RT2870STA.dat / etc/Wireless/RT2870STA/cp rt3070sta.ko /usr

4. Load the driver

insmod /usr/rt3070sta.ko 

5. Then, you can see through ifconfig-A that the system has correctly identified the NIC, named ra0.

6. Start the NIC ifconfig ra0 up and see the data output. The port is successfully transplanted.

Certificate ---------------------------------------------------------------------------------------------------------------------------------------------------

Possible problems:

1 rtmp_chip.c: 470: Error: Implicit declaration of function 'rt33xx _ init'

Solution: comment out the rt33xx_init (PAD) of line 470th in rtmp_chip.c under the chips directory)

2. Problems with insmod

Solution: Generally, the problem is that the kernel version used in the Board kernel is inconsistent with that used during cross-compilation. You can view the Board kernel version uname-A and modinfo rt3070sta. ko: Check the generated driver version to see if it is consistent. I encountered this problem and solved it one morning. I found that the version number was armv5 and armv7, and finally compiled the Linux source code (set the cross-compilation environment and run the build. SH), and then compile the WiFi module. When compiling the kernel, pay attention to setting the cross-compiling environment.

Related blog recommendations:

1 http://blog.chinaunix.net/uid-28599023-id-3483821.html

2 http://www.linuxidc.com/Linux/2011-03/33483.htm