使用Jtag烧写uboot，以及bootdelay=0的解决办法

一、XP 中安装GiveIO 的方法

正确连接Jtag烧写线，如果提示找不到cpu可能是插线接反。

1．首先将giveIO 文件夹下的Giveio.sys 拷贝到C:WindowsSystem32drivers 目录下。

2．进入控制面板，点击“添加硬件”。

3．选择“是，我已经连接了此硬件”

4．选择“添加新的硬件设备”，点击“下一步”

5．选择“安装我手动从列表选择的硬件（高级）”，点击“下一步”

6．选择“端口（COM 和LPT）”，点击“下一步”

7．在厂商中选择“（标准端口类型）”，点击“从磁盘安装（H）…”

8．在跳出的“从磁盘安装”窗口中点击“浏览（B）…”

9． 选择当前目录中的“giveio.inf”文件。

10． 在跳出的“硬件安装”窗口中点击“仍然继续（C）”

最后点击“完成”，结束安装，现在可以运行ZSJF24X0.exe 来对NandFlash 进行烧写了。

二、正常烧写

E:aa>sjf2410.exe /f:u-boot.bin

+------------------------------------+

| SEC JTAG FLASH(SJF) v 0.4 |

| (S3C2410X & SMDK2410 B/D) |

| --- 18/02/2004 [Nx] |

+------------------------------------+

Usage: SJF /f: /d=

> S3C2410X(ID=0x0032409d) is detected.

[SJF Main Menu]

0:K9F1208 prog 1:28F128J3A prog 2:AM29LV800 Prog 3:Memory Rd/Wr

4:Exit

Select the function to test:0

[K9F1208 NAND Flash JTAG Programmer]

K9F1208 is detected. ID=0xec76

0:K9F1208 Program 1:K9F1208 Pr BlkPage 2:Exit

Select the function to test :0

[SMC(K9S1208V0M) NAND Flash Writing Program]

Source size:0h~1c4abh

Available target block number: 0~4095

Input target block number:0

target start block number =0 烧写起始块

target size (0x4000*n) =0x20000 烧写占用字节数

STATUS:Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

0:K9F1208 Program 1:K9F1208 Pr BlkPage 2:Exit

Select the function to test :2

三、bootdelay=0的解决办法

首先我们要明确：

1. uboot烧写地址为0x0~0x20000

2. uboot参数保存在地址 0x20000~0x3FFFF

那么我们要做的就是？擦除参数保存的区域内容，或者说是让这个区域内容变得混乱一些。这样uboot在加载时会提示CRC校验错误，从而加载默认参数，实现我们的目的。

我的做法是将uboot.bin文件写入这个参数区域中，实现CRC检验失败的目的。

E:aa>sjf2410.exe /f:u-boot.bin

+------------------------------------+

| SEC JTAG FLASH(SJF) v 0.4 |

| (S3C2410X & SMDK2410 B/D) |

| --- 18/02/2004 [Nx] |

+------------------------------------+

Usage: SJF /f: /d=

> S3C2410X(ID=0x0032409d) is detected.

[SJF Main Menu]

0:K9F1208 prog 1:28F128J3A prog 2:AM29LV800 Prog 3:Memory Rd/Wr

4:Exit

Select the function to test:0

[K9F1208 NAND Flash JTAG Programmer]

K9F1208 is detected. ID=0xec76

0:K9F1208 Program 1:K9F1208 Pr BlkPage 2:Exit

Select the function to test :0

[SMC(K9S1208V0M) NAND Flash Writing Program]

Source size:0h~1c4abh

Available target block number: 0~4095

Input target block number:8 起始块数为8，那么开始地址就是0x4000*8=20000

target start block number =8

target size (0x4000*n) =0x20000 终止地址为20000+1FFFF=3FFFF

STATUS:Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

Epppppppppppppppppppppppppppppppp

0:K9F1208 Program 1:K9F1208 Pr BlkPage 2:Exit

Select the function to test :2

说明：起始地址是由0开始的，所以加上字节数要减1。

破解延时问题后，建议在uboot下使用命令擦除参数区域。

erase 20000 3ffff