Linux DNW烧写实例

本文主要是介绍Linux DNW烧写实例，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1、安装linux DNW

http://blog.csdn.net/sanlinux/archive/2010/04/09/5465012.aspx

2、在u-boot中选择需烧写的项，如内核、文件系统等。

 

#####    Boot for Nand Flash Main Menu  #####

[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash

[2] Download Eboot to Nand Flash

[3] Download Linux Kernel to Nand Flash

[5] Download CRAMFS image to Nand Flash

[6] Download YAFFS image to Nand Flash

[7] Download Program (uCOS-II or TQ2440_Test) to SDRAM and Run it

[8] Boot the system

[9] Format the Nand Flash

[0] Set the boot parameters

[a] Download User Program (eg: uCOS-II or TQ2440_Test)

[b] Download LOGO Picture (.bin) to Nand  Flash 

[l] Set LCD Parameters 

[r] Reboot u-boot

[q] quit from menu

Enter your selection: 6

USB host is connected. Waiting a download.

 

Now, Downloading [ADDRESS:30000000h,TOTAL:55866634]

RECEIVED FILE SIZE:55866634 (443KB/S, 123S)

 

NAND erase: device 0 offset 0x400000, size 0x3c00000

Skipping bad block at  0x01798000                                            

Skipping bad block at  0x02504000                                            

Erasing at 0x3ffc000 -- 100% complete.

OK

 

3、在PC端使用dnw传送需烧写的文件。

 

sudo dnw root_qtopia_2.2.0_2.6.30.4_64MB.bin

file name : root_qtopia_2.2.0_2.6.30.4_64MB.bin

file size : 55866624 bytes

Writing data...

23%      55866634 bytes     OK

 

4、说明：如果要了解整个烧写的过程，重点还是要分析uboot烧写的实现源码。

common目录下包含了uboot的内嵌命令(如usbslave, loady等)，需分析研究。

 

5、在烧写文件系统时，我们往往会烧写文件系统的实际大小，而不是分配的最大值。获取文件大小，并转化为十六进制的sh表达式为：

du -b file | awk '{printf "%x", $1}'

 

 

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