原创 EP9315引导好像有点麻烦，头大了。

bootloader当然可以自己写，

在你机子写的bootloader的0x0地址处加入CRUS的ASCII码不就行了吗？

你可以参考redboot或者u-boot，看看别人是怎么写的

但bootloader里面怎么跑可要自己来写啦，嘿嘿，慢慢就搞定了。

像bootloader这种东西，我想自己搞明白，虽然网上有各种的boot程序，如果没有辅助说明材料，想看明白他们的源码也是一件不容易的事。自己动手写写会更有效吧。

全是英文的哦，不过没关系，英文看得懂。redboot,zImage这些文件我这都有，也知道应该怎么下载，其实在我看来，无论是linux还是wince，都没什么分别，都是os,只是各有特色。我关心的不是怎么下下来，而是他们是怎么运行的，机制是什么，因为我想写自己的东西，虽然在linux或者wince上面开发应用软件是件很酷的事情，本质上讲和在台式机上写普通程序也没什么区别，换了换平台，多了一些注意，新方式。

如果过不了引导这一关，唉，我这么钱不就打水漂了，所以一定要解决阿。

要是有9315的启动源代码就好了，可是俺没有，卖板子的不给，气死我了，说是用ecos工具集生成，郁闷，我估计他们也不会，直接从公司网站上下的现成的执行文件。而且他们的技术支持也不好，带的驱动都少得可怜，给他们说多少遍了就是不给，我恨FFT。

谁要是给我发个9315的源码就好了

Download flow for Linux bin file on EDB93xx

software required: (tools) Tera Term Pro/HyperTerminal; TFTP Server; download.exe
     (bin file) redboot.bin ramdisk.gz zImage
hardware required: PC; EDB93XX;
                                cross earthnet(RJ45);
                                serial line(DB9): 1-->4  2-->3  3-->2  4-->1  5-->5  6-->4  7-->8  8-->7  9--NC

1) connect cross earthnet and serial line between EDB board and PC,and power on the EDB93XX;
2) download redboot into EDB board:
  under DOS command line, run >download redboot.bin;
  DOS shell display: Waiting for the board to wakeup...
  push down the button Serial boot and /por at same time, program will start erase and write
  withing for DOS shell display: Successfully programmed 'radboot.bin'.
  power off the EDB board;
3) download ramdisk.gz and zImage into EDB board:
  a) config user PC as: IP address: 192.168.1.1    Local IP address mask: 255.255.255.0
  b) run TFTP Server, and set >>file>configure>Security: Transmit and Receive file
                      >>file>configure>TFTP Root Directory: ramdisk.gz zImage directory
  c) run Tera Term Pro, and set. Port:COM1(using serial port)
                              Baud rate: 57600
                              Data: 8 bit
                              Parity: none
                              Stop: 1 bit
                              Flow control: none
  d) power on the EDB board;
  Tera Term display:
+FLASH configuration checksum error or invalid key
EP93xx - no EEPROM, static ESA, or RedBoot config option.
No network interfaces found

RedBoot(tm) bootstrap and debug environment [ROMRAM]
Non-certified release, version v2_0 - built 11:51:05, Jan 19 2006

Platform: Cirrus Logic EDB9315A Board (ARM920T) Rev A
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.

RAM: 0x00000000-0x04000000, 0x00041e68-0x03fdd000 available
FLASH: 0x60000000 - 0x61000000, 128 blocks of 0x00020000 bytes each.
RedBoot>
  e) initial flash rom:
RedBoot> fis init -f
About to initialize [format] FLASH image system - continue (y/n)? y
*** Initialize FLASH Image System
... Erase from 0x60040000-0x60fc0000: ..........................................
................................................................................
..
... Erase from 0x60fe0000-0x60fe0000:
... Erase from 0x61000000-0x61000000:
... Erase from 0x60fe0000-0x61000000: .
... Program from 0x03fdf000-0x03fff000 at 0x60fe0000: .
RedBoot>
  f) config redboot
RedBoot> fconfig -i
Initialize non-volatile configuration - continue (y/n)? y
Run script at boot: false
Use BOOTP for network configuration: false
Gateway IP address:
Local IP address: 192.168.1.2
Local IP address mask: 255.255.255.0
Default server IP address: 192.168.1.1
DNS server IP address:
Set eth0 network hardware address [MAC]: true
eth0 network hardware address [MAC]: 0x00:0x00:0x00:0x00:0x50:0x33
GDB connection port: 9000
Force console for special debug messages: false
Network debug at boot time: false
Update RedBoot non-volatile configuration - continue (y/n)? y
... Erase from 0x60fc0000-0x60fc1000: .
... Program from 0x03fde000-0x03fdf000 at 0x60fc0000: .
RedBoot>
  g) reset EDB per Tera Term
RedBoot> reset
... Resetting.
  h) download ramdisk into SDRAM
RedBoot> load -r -v -b 0x800000 ramdisk.gz
/
Raw file loaded 0x00800000-0x01153e13, assumed entry at 0x00800000
RedBoot>
  i) download zImage into SDRAM
RedBoot> load -r -v -b 0x80000 zImage
|
Raw file loaded 0x00080000-0x001a895f, assumed entry at 0x00080000
RedBoot>
  j) write ramdisk into flash rom
RedBoot> fis create -b 0x800000 -l 0xa00000 ramdisk
... Erase from 0x60040000-0x60a40000: ..........................................
......................................
... Program from 0x00800000-0x01200000 at 0x60040000: ..........................
......................................................
... Erase from 0x60fe0000-0x61000000: .
... Program from 0x03fdf000-0x03fff000 at 0x60fe0000: .
RedBoot>
  k) write zImage into flash rom
RedBoot> fis create -b 0x80000 -l 0x130000 zImage
... Erase from 0x60a40000-0x60b80000: ..........
... Program from 0x00080000-0x001b0000 at 0x60a40000: ..........
... Erase from 0x60fe0000-0x61000000: .
... Program from 0x03fdf000-0x03fff000 at 0x60fe0000: .
RedBoot>
  l) run Linux
RedBoot> exec -r 0x800000 -s 0xa00000
Using base address 0x00080000 and length 0x00128960
Uncompressing Linux.............................................................
.................... done, booting the kernel.

Please press Enter to activate this console.

BusyBox v1.00 (2006.01.19-17:48+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ # ls
Applications  bin           lib           proc          usr
Documents     dev           linuxrc       sbin          var
Noise.wav     etc           mnt           sys
Settings      home          opt           tmp
~ #
  m) re-config redboot as below:
RedBoot> fconfig -i
Initialize non-volatile configuration - continue (y/n)? y
Run script at boot: true
Boot script:
Enter script, terminate with empty line
>> fis load ramdisk
>> fis load zImage
>> exec -r 0x800000 -s 0xa00000
>>
Boot script timeout (1000ms resolution): 1
Use BOOTP for network configuration: false
Gateway IP address:
Local IP address: 192.168.1.2
Local IP address mask: 255.255.255.0
Default server IP address: 192.168.1.1
DNS server IP address:
Set eth0 network hardware address [MAC]: true
eth0 network hardware address [MAC]: 0x00:0x00:0x00:0x00:0x50:0x33
GDB connection port: 9000
Force console for special debug messages: false
Network debug at boot time: false
Update RedBoot non-volatile configuration - continue (y/n)? y
... Erase from 0x60fc0000-0x60fc1000: .
... Program from 0x03fde000-0x03fdf000 at 0x60fc0000: .
RedBoot>
  Now reset system, and all is OK!!!!

jasonw@lestina.com.cn