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JTAG cable and Jflash program are needed to port by this
method.
Jflash program and HOWTO_USE.txt written about usage of Jflash program are located
under /linuette/target/box/Jflash directory.
| # cd /linuette/target/box/Jflash |
Because we will write vivi(bootloader) to SMC by Jflash program, copy Jflash program to image directory. When or Why JTAG is used are mentioned in chap 4. Refer it.
| # cp ./Jflash-s3c2410 /image |
Connect target board and host PC by JTAG. Check the size of SMC(flash memory), then supply power to target board. The capacity of SMC is written at backside of itself.
| # ./Jflash-s3c2410 --help |
| +------------------------------------+ | SEC JTAG FLASH(SJF) v 0.11 + | modified by MIZI 2002.7.13 + +------------------------------------+ Usage: SJF <filename> /t=<flash_type> /d=<delay> Flash Type List 1:SMDK2410:K9S3208 4MB 2:SMDK2410:K9S6408 8MB 3:SMDK2410:K9S2808 16MB 4:SMDK2410:K9S5608 32MB 5:SMDK2410:K9S1208 64MB 6:SMDK2410:AM29LV800BB |
Also if you perform above command, you can know that it¡¯s needed
different options when executing Jflash program according to the size of flash
memory. MIZI-tool-box uses 64MB SMC, so we have to give ¡°/t=5¡± option.
Execute Jflash program with ¡°/t=5¡± option. If you uses different flash memory,
option will be changed.
| # ./Jflash-s3c2410 vivi /t=5 |
| +------------------------------------+ | SEC JTAG FLASH(SJF) v 0.11 + | modified by MIZI 2002.7.13 + +------------------------------------+ > flashType=5 > S3C2410X(ID=0x0032409d) is detected. > K9S1208 is detected. ID=0xec76 K9S1208 NAND Flash JTAG Programmer Ver 0.0 Select the function to test :0 : Input ¡°0¡±. [SMC(K9S1208) NAND Flash Writing Program] Source size: 0xe4af Available target block number: 0~4095 K9S1208 NAND Flash JTAG Programmer Ver 0.0 Select the function to test :2 :Quit by pushing ¡°2¡±. |
Through above work, vivi is written to flash memory.
Above all things vivi(bootloader) should be stored in SMC(flash memory), only
so we can write vivi(bootloader), kernel image, root filesystem etc. to SMC
on prompt mode of vivi(bootloader). Exactly, if bootloader doesn¡¯t exist in
flash memory, we first write bootloader by JTAG.
We have uploaded vivi to SMC in above pages, so Now we will downloaded vivi(bootloader),
kernel, Root filesystem etc. by xmodem of minicom.
Execute minicom after connecting host to target board by serial cable.
Supply power to target board, in that case target board is waiting inputs during
the times defined by developer. If we do not input anything or press ¡°Enter¡±,
target board begins to boot. Instead, if you input ¡°space-bar¡± key, target board
enters vivi prompt mode. The waiting time of target board is very short so press
¡°space-bar¡± quickly if you want to use target board console.
| # minicom Supply power to target board, then press ¡°space-bar¡± quickly. vivi> |
If writing vivi on SMC is done successfully, you can boot(?) a little and use vivi prompt. In here, you can write all images including vivi again through vivi prompt.
But before writing the images, you have to do partitioning SMC to assign the memories.
SMC is composed of bon filesystem and vivi supports this. So you can make partitions through vivi prompt.
Make partitions by following command.
| vivi> bon part 0 192k 1M |
This command make three partitions which size are 0~192k, 192k~1M, and 1M~64M.
| 0~192k : vivi will be written here. 192k~1M : zImage(kernel) will be written here. 1M~64M : root.cramfs(root filesystem) will be written here. |
Above command does formatting SMC as well as partitioning it. So if you do next steps like writting kernel and root filesystem, you have to write vivi again.
Write vivi by following command.
| vivi> load flash vivi x |
| # cd /image # minicom Supply power to target board, then press ¡°space-bar¡± quickly. |
After sending ¡°load flash kernel x¡± command, press ¡°Ctrl+A¡± keys, and without
delay press ¡°S¡± key. Window questioning about transfer mode will appear. In
there, select xmodem.
Then terminal executing minicom will show the present location of host PC. Find
the kernel image and select that by ¡°space-bar¡±. Pressing ¡°Enter¡±, transferring
will starts.
| vivi> load flash kernel x |
| Quickly press ¡°Ctrl + A¡± and ¡°S¡±, then select xmodem for transfer mode. |
| If you press ¡°space-bar¡± twice, directory changing happens and if you
press ¡°space-bar¡± once, relevant data is selected. Select zImage by pressing ¡°space-bar¡± one time. |
| Press ¡°Enter¡±, then transmission begins. |
If ¡°transfer incomplete¡± message is appeared when writing images, the cause
is that the timeout of xmodem_initial is too short. In this case, you can solve
the problem by increasing the timeout of xmodem_initial.
First check the value of ¡°xmodem_initial_timeout¡± parameter. Then you think
it is too short, extend timeout properly.
| # param show # param set xmodem_initial_timeout 1000000 : ¡°1000000¡± means 1 second because a unit is microsecond. # param save |
After setting like above, do writing images again.
Let's write root filesystem in SMC. The steps of this work are the same as those of above.
But there is one caution.
vivi can't write the root image, which size is bigger than 1.2MB, on SMC.
Because vivi is coded to use decided partition size of bon filesystem that is a kinds of layer for nand flash,
although it controls all area of SMC. The decided size is approximately 1.2~1.3MB.
So, please use small size of root image when writing root filesystem on SMC. If you have finished
this work well and rebooted target system, you can use the console of target system.
The detail steps of writing root image are listed as bellowing. Just follow.
Send ¡°load flash root x¡± command, then press ¡°Ctrl+A¡± keys, and ¡°S¡± key without
delay. Window questioning about transfer mode will appear. In
there, select xmodem.
Then terminal executing minicom will show the present location of host PC. Find
the root image and select that by ¡°space-bar¡±. Pressing ¡°Enter¡±, transferring
will starts.
| vivi> load flash root x |
| Quickly press ¡°Ctrl + A¡± and ¡°S¡±, then select xmodem for transfer mode. |
| If you press ¡°space-bar¡± twice, directory changing happens and if you
press ¡°space-bar¡± once, relevant data is selected. Select root.cramfs by pressing ¡°space-bar¡± one time. |
| Press ¡°Enter¡±, then transmission begins. |
If you want to use bigger size of root filesystem that includes usr applications(GUI),
upload the root image such as root_english.cramfs to tmp directory of target system throuth ztelnet
and then write it to SMC by using imagewrite utility.
The detail steps of it are explained in "4.1.3 imagewrite". Refer it.
Writing root image is devided into two parts because loading big root image through serial cable takes too long.
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