烧写板子的过程中遇到的若干个问题 板子

linuxarm

1.写好了程序不必立刻写入flash中,可挂载在本机上,但出现这种错误:
# mount 192.168.2.122:/ /mnt
mount: Mounting 192.168.2.122:/ on /mnt failed: No such file or directory
说明nfs没有设置好.
我觉得在装系统时最好全部安装,因为我以前部分安装时,没装tftp,后来又单独安装了tftp的rpm包,试了很多遍,结果还是不能用,全部安装以后
问题解决,我猜想是不是还要装一些关联的库.

2. 30008000是zImage,30800000是ramdisk在ram中的默认下载地址,可以改变的.

3.
Retry count exceeded; starting again
NetOurIP =c0a80278
NetServerIP = c0a8027a
NetOurGatewayIP = c0a80201
NetOurSubnetMask = ffffff00
ARP broadcast 1
ARP broadcast 2
ARP broadcast 3
ARP broadcast 4
ARP broadcast 5
我遇到的原因是我的IP地址没有设为192.168.2.122.改为192.168.2.122后出现:
Retry count exceeded; starting again
NetOurIP =c0a80278
NetServerIP = c0a8027a
NetOurGatewayIP = c0a80201
NetOurSubnetMask = ffffff00
ARP broadcast 1
ARP broadcast 2
TFTP from server 192.168.2.122;our IP address is 192.168.2.120
Loading:
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
当时试了好多次都这样,但是第二天在试就成功了.百思不得其解向wpq询问知道是网络不流畅,多试几次就好了,T表示timeout

4.进入SMDK2410目录相当于进入PC机的BIOS,故在SMDK2410# 后ifconfig是错误的命令.在SMDK2410# 输入help可以显示可在此目录下使用的命令

5.[root@localhost Images]# ./flash
+------------------------------------+
|     SEC JTAG FLASH(SJF) v 0.3      |
|     (S3C2410X & SMDK2410 B/D)      |
+------------------------------------+
Usage: SJF /f: /d=
> No CPU is detected.

[SJF Main Menu]
0:K9S1208 program      1:28F128J3A program    2:Memory Rd/Wr         3:Exit
        
Select the function to test:1

[28F128J3A Flash JTAG Programmer]

*** Very Important Notes ***
1. 28F128J3A must be located at 0x08000000.
J6  : connect 2-3 pins,   J9  : connect 1-2 pins
J33 : Open,               J34 : Short
2. After programming, 28F128J3A may be located at 0x0.
J6  : connect 1-2 pins,   J9  : connect 2-3 pins
J33 : Short,              J34 : Open

Source size = 15d54h

Available Target Offset Address:
0x0,0x20000,0x40000, ..., 0x1ce0000
Input target address offset [0x?] : 0x08000000
Target base address(0x08000000) = 0x0
Target offset      (0x0)        = 0x8000000
Target size        (0x20000*n)  = 0x15d54
Identification check error !!
[root@localhost Images]#
开始以为是flash坏了,好害怕,后来才明白是JTAG接触不好.在烧写ppcboot时最好用tftp先下载,实在不行在用JTAG.

linuxarm

6.每次Mount上ramdisk.image后，不能umount？，主机上显示device is busy.
我的解决方法是打开 系统工具=>系统监视器,杀死最下面的fam进程就好了,我也不知道为什么,呵呵.

7.烧写ramdisk时发生这样的错误
SMDK2410 # fl 1140000 30800000 220000
start_sect=0xa,end_sect=0x1a
************erase sector 0xa***********
************erase sector 0xb***********
************erase sector 0xc***********
************erase sector 0xd***********
************erase sector 0xe***********
************erase sector 0xf***********
************erase sector 0x10***********
************erase sector 0x11***********
************erase sector 0x12***********
************erase sector 0x13***********
************erase sector 0x14***********
************erase sector 0x15***********
************erase sector 0x16***********
************erase sector 0x17***********
************erase sector 0x18***********
************erase sector 0x19***********
************erase sector 0x1a***********
----------program sector 0xa---------
----------program sector 0xb---------
Error Command Sequence!mflash_program_sector error : status read
flash not completed for error

经wpq和hn的指点知道是flash的第13个扇区坏了,可以跳过此坏扇区.flash是16M,共128个扇区,16M/128=128K,每个扇区是128k,换成16进制是20000,我的flash是0xc错了,故要跳过0xa和0xb两个扇区继续写,20000*2=40000,可以多跳几个扇区.写在11a0000中.
还有修改ppcboot重新编译,在\ppcboot-2\ppcboot-2.0.0-old\lib_arm下的armlinux.c的196行左右将0x140000改为1a0000,这里的40000和

140000都是逻辑地址,在flash中起始地址是1000000,故实际的地址分别为1040000和1140000,现在ramdisk改写在11a0000中了,呵呵.

好了,先写到这里了,希望对初学者有所帮助,小妹我还要继续下大家学习,在此对wpq和kangw表示最由衷的感谢.......~!~