嵌入式 Linux 内核驱动开发【1】
- 嵌入式 Linux 内核驱动开发前言
- 第1章 Linux 内核裁剪和定制
由于篇幅太大，以章分块，按天写
嵌入式 Linux 内核驱动开发前言
本篇一共分 11 章，各章标题和内容概要如下：
本篇的内容涵盖了嵌入式 Linux 产品开发过程中底层开发的大部分工作，给出的实例也都具有很强的参考意义。
第1章 Linux 内核裁剪和定制
【1】Linux 内核开发简介
-
具备操作系统的基本知识，理解操作系统原理，最好了解 ~~Linux 操作系统~~ ； -
内核绝大部分都是 C 语言编写的，~~C 语言~~ 是必备技能； -
内核是用 ~~GNU C 编写的~~ ，尽管符合 ISO C89 标准，但还是使用了一些 GNU 扩展，所以对 GNU C 的一些扩展也必须有所了解； -
对 ~~Linux 内核源码~~ 基本分布有大致了解； -
产品级的内核开发通常还包括一些内核驱动工作，对~~外设工作原理和驱动编写~~ 也必须有一定的了解。
【2】 Linux 源码阅读工具
【1.2.1】Source Insight
注意：蓝色字体的超链接是我改过的为了好看而已
安装 Source Insight 软件后，新建一个工程，取名并指定数据存放位置，如图 1.1 所示。
然后添加源码。浏览选中 Linux 内核源码文件夹后，点击“Add Tree”按钮，将内核源码树的全部文件添加到工程中，如图 1.3 所示。
添加完成，即可在 Source Insight 中进行源码阅读和编辑了，如图 1.4 所示。
【1.2.2 Eclipse】
创建内核源码工程。点击 FileNewProject，开始创建工程，在工程创建界面选择创建 C 工程，如图 1.5 所示。
点击 Next，在 C Project 界面的 Project name 栏中填写工程名称，去掉“Use default location”的勾，点击 Browse 将 Location 设置为 Linux 内核源码目录，如图 1.6 所示。如果不在 Eclipse中编译内核，则使用 Linux GCC 即可，否则请使用安装好的 Cross GCC
然后点击 Finish，完成 Linux 内核源码导入，在 Eclipse 中即可进行代码阅读和编辑了，如图 1.7 所示。
【1.2.3】 vim+ctags+cscope
1． Taglist
2． Ctags
$ sudo apt-get install exuberant-ctags
3． 源码阅读和跟踪
$ ctags -R
注意：如果修改了源码，代码行号发生了变化，需要重新生成 tags 文件。
【1.2.4】 LXR
【3】Linux 内核源码
【1.3.1 目录树概览】
各个目录文件的简要说明如表 1.1 所列。
| 目录 | 内容 |
|---|---|
| arch/ | 包含各体系结构特定的代码，如 arm、x86、ia64、mips 等，在每个体系结构目录下通常都有： －boot 内核需要的特定平台代码 －kernel 体系结构特有的代码 －lib 通用函数在特定体系结构的实现 －math-emu 模拟 FPU 的代码，在 ARM 中，使用 mach-xxx 代替 －mm 特定体系结构的内存管理实现 －include 特定体系的头文件 |
| block/ | 存放块设备相关代码 |
| crypto/ | 存放加密、压缩、CRC 校验等算法相关代码 |
| Documentation/ | 存放相关说明文档，很多实用文档，包括驱动编写等 |
| drivers/ | 存放 Linux 内核设备驱动程序源码。驱动源码在 Linux 内核源码中站了很大比例，常见外设几乎都有可参考源码，对驱动开发而言，该目录非常重要。该目录包含众多驱动，目录按照设备类别进行分类，如 char、block、input、i2c、spi、pci、usb 等 |
| firmware/ | 存放处理器相关的一些特殊固件 |
| fs/ | 存放所有文件系统代码，如 fat、ext2、ext3、ext4、ubifs、nfs、sysfs 等 |
| include/ | 存放内核所需、与平台无关的头文件，与平台相关的头文件已经被移动到 arch 平台的include 目录，如 ARM 的头文件目录<arch/arm/include/asm/> |
| init/ | 包含内核初始化代码 |
| ipc/ | 存放进程间通信代码 |
| kernel/ | 包含 Linux 内核管理代码 |
| lib/ | 库文件代码实现 |
| mm/ | 存放内存管理代码 |
| net/ | 存放网络相关代码 |
| samples/ | 存放提供的一些内核编程范例，如 kfifo；后者相关用户态编程范例，如 hidraw |
| srcipts/ | 存放一些脚本文件，如 menuconfig 脚本 |
| security/ | 存放系统安全性相关代码 |
| sound | 存放声音、声卡相关驱动 |
| tools/ | 编译过程中一些主机必要工具 |
| usr/ | cpio 相关实现 |
| virt/ | 内核虚拟机 KVM |
【1.3.2】 快速确定主板关联代码
1． 基础代码
确定主板名称和默认配置文件。
确定对应的主板文件。
# Intel/Marvell Dev Platforms
obj-$(CONFIG_ARCH_LUBBOCK) += lubbock.o
obj-$(CONFIG_MACH_MAINSTONE) += mainstone.o
obj-$(CONFIG_MACH_ZYLONITE300) += zylonite.o zylonite_pxa300.o
2． 驱动代码
【4】 Linux 内核中的 Makefile 文件
【1.4.1】 顶层 Makefile
1． 内核版本号
打开顶层 Makefile，开头的几行记录了内核源码的版本号，通常如下所示：
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 35
EXTRAVERSION =3
# uname -a
Linux boy 2.6.35.3-571-gcca29a0-gd431b3d-dirty #22 PREEMPT Tue Oct 27 20:12:33 CST 2015 armv5tejl
GNU/Linux
2． 编译控制
- （1）体系结构
ARCH ?= $(SUBARCH)
SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
-e s/arm.*/arm/ -e s/sa110/arm/ \
-e s/s390x/s390/ -e s/parisc64/parisc/ \
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
-e s/sh[234].*/sh/ )
$make ARCH=arm
- （2）编译器
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
……
AS = $(CROSS_COMPILE)as
LD = $(CROSS_COMPILE)ld
CC = $(CROSS_COMPILE)gcc
CPP = $(CC) –E
AR = $(CROSS_COMPILE)ar
NM = $(CROSS_COMPILE)nm
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
$ make ARCH=arm CROSS_COMPILE= arm-linux-gnueabihf-
CROSS_COMPILE = arm-linux-gnueabihf-
注意：CROSS_COMPILE 指定的交叉编译器必须事先安装并正确设置系统环境变量；如果没有设置环境变量，则需使用绝对地址，例如：
CROSS_COMPILE =/home/ctools/linux-devkit/bin/arm-linux-gnueabihf-
【1.4.2】 子目录的 Makefile
obj-y += usb-host.o # 默认编译 usb-host.c 文件
obj-y += gpio/ # 默认编译 gpio 目录
obj-$(CONFIG_WDT) += wdt.o # wdt.c 编译控制
obj-$(CONFIG_PCI) += pci/ # pci 目录编译控制
【5】 Linux 内核中的 Kconfig 文件
【1.5.1】 Kconfig 基本语法
menu "Character devices"
source "drivers/tty/Kconfig"
config DEVKMEM
bool "/dev/kmem virtual device support"
default y
help
Say Y here if you want to support the /dev/kmem device. The
/dev/kmem device is rarely used, but can be used for certain
kind of kernel debugging operations.
When in doubt, say "N".
……
endmenu
1． 子菜单
config DEVKMEM
bool "/dev/kmem virtual device support"
[*] /dev/kmem virtual device support
2． 属性
[*] /dev/kmem virtual device support
对于三态选项，在配置界面用< >表示：
<*> Kernel .config support
menuconfig GENERIC_PWM
tristate "PWM Support"
default n
help
Enables PWM device support implemented via a generic
framework. If unsure, say N.
在配置界面表现为：
< > PWM Support --->
config ARM
bool
default y
select HAVE_AOUT
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
depends on SMP
default "4"
3． 目录层次迭代
【1.5.2】 配置项和配置开关
obj-$(CONFIG_BAR) += file_bar.o
#if defined (CONFIG_BAR)
实际处理代码
#endif
#if defined (CONFIG_BAR) || defined (CONFIG_BAR_MODULE)
实际处理代码
#endif
【6】 配置和编译 Linux 内核
【1.6.1】 快速配置内核
$ make ARCH=arm menuconfig
$ cp .config config-bak
$ cp config-bak .config
$ make m3352_defconfig 或者
$ make ARCH=arm CROSS_COMPILE= arm-linux-gnueabihf- m3352_defconfig
【1.6.2】 内核配置详情
Linux 内核配置菜单比较复杂，下面对一些比较重要的配置界面进行介绍，更多的详细配置，建议进行实际操作。另外，由于 Linux 内核版本差异，实际看到的内核配置界面可能与本节的介绍有所差异。
图 1.12 所示的内核配置主界面，实际包含了如表 1.4 所列的各项一级菜单。
1． 通用设置
2． 内核特性
3． 启动选项
(root=/dev/mmcblk0p2 rootwait console=ttyO0,115200) Default kernel command string
( ) Use bootloader kernel arguments if available
( ) Extend bootloader kernel arguments
( ) Always use the default kernel command string
4． 网络支持
[*] TCP/IP networking
[*] IP: multicasting
[*] IP: advanced router
[*] FIB TRIE statistics
[*] IP: policy routing
[*] IP: equal cost multipath
[*] IP: verbose route monitoring
[*] IP: kernel level autoconfiguration
[*] IP: DHCP support
[*] IP: BOOTP support
[*] IP: RARP support
<*> IP: tunneling
<*> IP: GRE demultiplexer
<*> IP: GRE tunnels over IP
[*] IP: broadcast GRE over IP
[*] IP: multicast routing
[*] IP: multicast policy routing
[*] IP: PIM-SM version 1 support
[*] IP: PIM-SM version 2 support
[*] IP: ARP daemon support
[*] IP: TCP syncookie support
<*> IP: AH transformation
<*> IP: ESP transformation
<*> IP: IPComp transformation
<*> IP: IPsec transport mode
<*> IP: IPsec tunnel mode
<*> IP: IPsec BEET mode
<*> Large Receive Offload (ipv4/tcp)
<*> INET: socket monitoring interface
[*] TCP: advanced congestion control --->
[*] TCP: MD5 Signature Option support (RFC2385) (EXPERIMENTAL)
<M> The IPv6 protocol --->
5． 设备驱动
6． 文件系统
【1.6.3】 编译内核
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi-
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- -j8
1． zImage
cmd_arch/arm/boot/zImage := /home/ctools/i686-arago-linux/usr/bin/arm-linux-gnueabihf-objcopy -O binary
-R .comment -S arch/arm/boot/compressed/vmlinux arch/arm/boot/zImage
2． uImage
$ cd arch/arm/boot
$ ls -la Image zImage uImage
-rwxrwxr-x 1 chenxibing chenxibing 6460852 Jul 25 09:24 Image
-rw-rw-r-- 1 chenxibing chenxibing 3135544 Jul 25 09:24 uImage
-rwxrwxr-x 1 chenxibing chenxibing 3135480 Jul 25 09:24 zImage
3． mkimage 工具
$ ./mkimage 或者 mkimage
Usage: ./mkimage -l image
-l ==> list image header information
./mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image
-A ==> set architecture to 'arch'
-O ==> set operating system to 'os'
-T ==> set image type to 'type'
-C ==> set compression type 'comp'
-a ==> set load address to 'addr' (hex)
-e ==> set entry point to 'ep' (hex)
-n ==> set image name to 'name'
-d ==> use image data from 'datafile'
-x ==> set XIP (execute in place)
./mkimage [-D dtc_options] -f fit-image.its fit-image
./mkimage -V ==> print version information and exit
$ mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image
$ mkimage -A arm -O linux -T kernel -C none -a 0x40008000 -e 0x40008000 -n 'Linux-2.6.35' -d
arch/arm/boot/zImage arch/arm/boot/uImage
$ mkimage -l uImage_file
$ mkimage -l uImage
Image Name: Linux-2.6.35.3-571-gcca29a0-g191
Created: Tue Nov 17 11:57:47 2015
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2572336 Bytes = 2512.05 kB = 2.45 MB
Load Address: 40008000
Entry Point: 40008000
quiet_cmd_uimage = UIMAGE $@
cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \
-C none -a $(LOADADDR) -e $(STARTADDR) \
-n 'Linux-$(KERNELRELEASE)' -d $< $@
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- -j8 uImage
cmd_arch/arm/boot/uImage := /bin/bash /home/vmuser/prj/m28x/kernel/linux-2.6.35.3/scripts/mkuboot.sh -A arm
-O linux -T kernel -C none -a 0x40008000 -e 0x40008000 -n 'Linux-2.6.35.3-571-gcca29a0-g1914ba0' -d
arch/arm/boot/zImage arch/arm/boot/uImage
4． 编译内核模块
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabiINSTALL_MOD_PATH=/home/chenxibing/work/rootfs
modules_install
kernel/drivers/net/bonding/bonding.ko: (1)
kernel/drivers/usb/serial/usbserial.ko: (2)
kernel/drivers/usb/serial/ftdi_sio.ko:kernel/drivers/usb/serial/usbserial.ko (3)
# insmod kernel/drivers/net/bonding/bonding.ko
# modprobe bonding
# indmod kernel/drivers/usb/serial/usbserial.ko
# insmod kernel/drivers/usb/serial/ftdi_sio.ko
# modprobe ftdi_sio
1.6.4 运行内核
# tftp 40007fc0 uImage
# bootm 40007fc0
## Booting kernel from Legacy Image at 40007fc0 ...
Image Name: Linux-2.6.35.3-571-gcca29a0-gd43
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2653928 Bytes = 2.5 MB
Load Address: 40008000
Entry Point: 40008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
……
以下省略
【7】 Linux 内核裁剪实例
基于某一个最接近的主板配置来修改；
必须的、能确定的选项选中；
不能确定的则不要改变原来配置；
可选可不选的，建议根据 help 信息决定或者不选；
一次改动不要太多，渐进式修改和验证；
注意及时备份配置文件，出现意外可以回退恢复。
【1.7.1】 GPIO 子系统配置
$ make ARCH=arm menuconfig
[*] Networking support --->
Device Drivers --->
File systems --->
Kernel hacking --->
[*] SPI support --->
PPS support --->
PTP clock support
-*- GPIO Support --->
<*> PWM Support --->
--- GPIO Support
[*] /sys/class/gpio/... (sysfs interface)
*** Memory mapped GPIO drivers: ***
【1.7.2 】LED 子系统配置
<*> MMC/SD/SDIO card support --->
< > Sony MemoryStick card support (EXPERIMENTAL) --->
[*] LED Support --->
[ ] Accessibility support --->
--- LED Support
[*] LED Class Support
*** LED drivers ***
...
[*] LED Trigger support
*** LED Triggers ***
<*> LED Timer Trigger
<*> LED Heartbeat Trigger
< > LED backlight Trigger
<*> LED GPIO Trigger
<*> LED Default ON Trigger
【1.7.3】 串口配置
Input device support --->
Character devices --->
-*- I2C support --->
[*] /dev/kmem virtual device support
Serial drivers --->
[ ] ARM JTAG DCC console
<M> 8250/16550 and compatible serial support
*** Non-8250 serial port support ***
<*> i.MXS debug serial port support
<*> i.MXS Application serial port support
【1.7.4】 USB Host 驱动配置
1． 使用 U 盘
[*] Block devices --->
[*] Misc devices --->
SCSI device support --->
< > Serial ATA and Parallel ATA drivers --->
< > RAID Transport Class
<*> SCSI device support
< > SCSI target support
[*] legacy /proc/scsi/ support
*** SCSI support type (disk, tape, CD-ROM) ***
<*> SCSI disk support
< > SCSI tape support
< > SCSI OnStream SC-x0 tape support
< > Sound card support --->
[ ] HID Devices --->
[*] USB support --->
<*> MMC/SD/SDIO card support --->
--- USB support
<*> Support for Host-side USB
[*] USB device filesystem (DEPRECATED)
[*] USB device class-devices (DEPRECATED)
[*] USB runtime power management (suspend/resume and wakeup)
<*> EHCI HCD (USB 2.0) support
[*] Support for Freescale controller
[*] Support for Host1 port on Freescale controller
[*] Support for DR host port on Freescale controller
[*] Root Hub Transaction Translators
…
<*> USB Mass Storage support
[ ] USB Mass Storage verbose debug
File systems --->
DOS/FAT/NT Filesystems --->
<*> MSDOS fs support
<*> VFAT (Windows-95) fs support
(437) Default codepage for FAT
(iso8859-1) Default iocharset for FAT
< > NTFS file system support
2． 使用 USB 键盘和鼠标
<*> Sound card support --->
[*] HID Devices --->
[*] USB support --->
<*> MMC/SD/SDIO card support --->
--- HID Devices
-*- Generic HID support
[ ] /dev/hidraw raw HID device support
*** USB Input Devices ***
<*> USB Human Interface Device (full HID) support
[ ] PID device support
[ ] /dev/hiddev raw HID device support
Special HID drivers --->
< > Telephony support --->
Input device support --->
Character devices --->
-*- I2C support --->
< > Joystick interface
<*> Event interface
< > Event debugging
`当然，还需要 USB Host 支持，参考前面“使用 U 盘”配置部分配置好 USB 控制器。
保存配置并编译内核，使用新内核的系统即可支持 USB 键盘和鼠标。`
【1.7.5】 USB Gadget 驱动配置
Device Drivers --->
[*] USB support --->
<*> USB Gadget Support --->
<*> USB Peripheral Controller (Inventra HDRC USB Peripheral (TI, ADI, ...)) --->
<M> USB Gadget Drivers
< > Gadget Zero (DEVELOPMENT)
< > Audio Gadget (EXPERIMENTAL)
<M> Ethernet Gadget (with CDC Ethernet support)
[*] RNDIS support
...
<M> File-backed Storage Gadget (DEPRECATED)
[ ] File-backed Storage Gadget testing version
<M> Mass Storage Gadget
< > Serial Gadget (with CDC ACM and CDC OBEX support)
【1.7.6】 SD/MMC 驱动配置
Device Drivers --->
<*> MMC/SD/SDIO card support --->
--- MMC/SD/SDIO card support
...
*** MMC/SD/SDIO Card Drivers ***
<*> MMC block device driver
(8) Number of minors per block device
[*] Use bounce buffer for simple hosts
< > SDIO UART/GPS class support
< > MMC host test driver
*** MMC/SD/SDIO Host Controller Drivers ***
...
[*] Freescale i.MX Secure Digital Host Controller Interface
<*> MXS MMC support
File systems --->
<*> Second extended fs support
<*> Ext3 journalling file system support
<*> The Extended 4 (ext4) filesystem
【1.7.7】 网卡驱动配置
Power management options --->
[*] Networking support --->
Device Drivers --->
File systems --->
为了正常使用网络，通常还需在“`Networking options`”中配置 `TCP/IP`：
[*] Networking support --->
Networking options --->
<*> Packet socket
<*> Unix domain sockets
< > PF_KEY sockets
[*] TCP/IP networking
[*] IP: multicasting
[ ] IP: advanced router
[*] IP: kernel level autoconfiguration
[*] IP: DHCP support
[*] IP: BOOTP support
[*] IP: RARP support
Device Drivers --->
[ ] Multiple devices driver support (RAID and LVM) --->
< > Generic Target Core Mod (TCM) and ConfigFS Infrastructure --->
[*] Network device support --->
[ ] ISDN support --->
< > Telephony support --->
Input device support --->
[*] --- Ethernet (10 or 100Mbit) --->
…
<*> FEC ethernet controller (of ColdFire and some i.MX CPUs)
[*] Second FEC ethernet controller (on some ColdFire CPUs)
【1.7.8】 NFS Client 配置
File systems --->
[*] Network File Systems --->
<*> NFS client support
[*] NFS client support for NFS version 3
[*] NFS client support for the NFSv3 ACL protocol extension
[*] NFS client support for NFS version 4
[*] NFS client support for NFSv4.1 (EXPERIMENTAL)
[*] Root file system on NFS
【1.7.9】 PPP 拨号配置
Device Drivers --->
[*] Network device support --->
<M> PPP (point-to-point protocol) support
<M> PPP BSD-Compress compression
<M> PPP Deflate compression
[*] PPP filtering
<M> PPP MPPE compression (encryption) (EXPERIMENTAL)
[*] PPP multilink support (EXPERIMENTAL)
<M> PPP over Ethernet (EXPERIMENTAL)
<M> PPP support for async serial ports
<M> PPP support for sync tty ports
#insmod slhc.ko
#insmod ppp_generic.ko
#insmod pppox.ko
#insmod pppoe.ko
插入模块后，生成/dev/ppp 设备节点，通过 ppp 拨号脚本即可进行拨号了。
【1.7.10】 MTD 配置
< > Connector - unified userspace <-> kernelspace linker --->
<*> Memory Technology Device (MTD) support --->
Device Tree and Open Firmware support --->
< > Parallel port support --->
--- Memory Technology Device (MTD) support
< > MTD tests support (DANGEROUS)
< > RedBoot partition table parsing
[*] Command line partition table parsing
...
<*> Direct char device access to MTD devices
-*- Common interface to block layer for MTD 'translation layers'
<*> Caching block device access to MTD devices
…
<*> NAND Device Support --->
--- NAND Device Support
[ ] Verify NAND page writes
[ ] Support software BCH ECC
[ ] Enable chip ids for obsolete ancient NAND devices
< > GPIO NAND Flash driver
<*> NAND Flash device on OMAP2, OMAP3 and OMAP4
[root@M283 ~] # cat /proc/mtd
dev: size erasesize name
mtd0: 00c00000 00020000 "reserve"
mtd1: 00080000 00020000 "reserve"
mtd2: 00080000 00020000 "reserve"
mtd3: 00080000 00020000 "reserve"
mtd4: 00080000 00020000 "reserve"
mtd5: 04000000 00020000 "rootfs"
mtd6: 02e00000 00020000 "opt"
【1.7.11】 UBIFS 文件系统配置
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
<*> Enable UBI - Unsorted block images --->
--- Enable UBI - Unsorted block images
(4096) UBI wear-leveling threshold
(1) Percentage of reserved eraseblocks for bad eraseblocks handling
< > MTD devices emulation driver (gluebi)
[ ] UBI debugging
File systems --->
[*] Miscellaneous filesystems --->
<*> UBIFS file system support
[*] Extended attributes support
[*] Advanced compression options
[*] LZO compression support (NEW)
[*] ZLIB compression support (NEW)
【1.7.12】 CAN 驱动配置
Power management options --->
[*] Networking support --->
Device Drivers --->
File systems --->
--- Networking support
Networking options --->
[ ] Amateur Radio support --->
<*> CAN bus subsystem support --->
< > IrDA (infrared) subsystem support --->
--- CAN bus subsystem support
<*> Raw CAN Protocol (raw access with CAN-ID filtering)
<*> Broadcast Manager CAN Protocol (with content filtering)
< > CAN Gateway/Router (with netlink configuration) (NEW)
CAN Device Drivers --->
CAN Device Drivers --->
<*> Virtual Local CAN Interface (vcan) (NEW)
<> Serial / USB serial CAN Adaptors (slcan) (NEW)
< > Platform CAN drivers with Netlink support (NEW)
<*> Freescale FlexCAN
【8】 EPC-28x 平台内核快速编译
1. 解压缩
vmuser@Linux-host ~$ tar -vxjf EPC-28x.xxxxx.tar.bz2
2. 编译内核
vmuser@Linux-host ~$ cd linux-2.6.35.3
vmuser@Linux-host ~/ linux-2.6.35.3$ make uImage
vmuser@Linux-host ~/ linux-2.6.35.3$cp .config config-bak
第二章，等你
