2009-07-20 22:21:07     how to config sdram 64Mbyte in uclinux(533ezkit)?

2009-07-20 22:21:07     how to config sdram 64Mbyte in uclinux(533ezkit)?

miaolf miao (CHINA)

Message: 77778   

HI,ALL!

in my board,CPU is bf531,sdram is a 48lc32m16a2-75c(64Mbyte),i can config and read and write in visualdsp5.0++,

*pEBIU_SDBCTL = 0x00000025;  but in uboot  and uclinux ,It  can't work with config. (with default config 32M ,it worked well,but only 32M memory can be seen)who can help me?

thanks!

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2009-07-20 22:42:10     Re: how to config sdram 64Mbyte in uclinux(533ezkit)?

Mike Frysinger (UNITED STATES)

Message: 77782   

do not use VDSP to reprogram any memory controllors, nor write to the registers directly under u-boot/linux.  use the normal defines as documented:

http://docs.blackfin.uclinux.org/doku.php?id=bootloaders:u-boot:porting

if you dont know how to calculate the timings for your board, then use the documentation:

http://docs.blackfin.uclinux.org/doku.php?id=bfin:sdram

i dont see what the bf533-ezkit has to do with your custom BF531 board

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2009-07-25 06:17:25     Re: how to config sdram 64Mbyte in uclinux(533ezkit)?

miaolf miao (CHINA)

Message: 78034   

i download the last version of u-boot.(2008.10-2009R1-RC3).

i use bf533-ezkit_config.

/include/configs/bf533-ezkit.h   :#define CONFIG_MEM_SIZE           32M

I  changed 32M to 64M,

make. 

I burned u-boot.bin, then ,reset my board.  It  can't  boot.

If  i  used default  config  "32M" , My board boot  OK.

How can i  resolved it?

thanks!

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2009-07-25 22:38:46     Re: how to config sdram 64Mbyte in uclinux(533ezkit)?

Mike Frysinger (UNITED STATES)

Message: 78042   

same answer as before

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2009-07-30 23:26:25     Re: how to config sdram 64Mbyte in uclinux(533ezkit)?

miaolf miao (CHINA)

Message: 78228   

I read the page as you told me for many times,but i can't find how to config sdram. .

  blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&thread_id=26423&_forum_action=ForumMessageBrowse

in this page, problerm is same to me. but his uboot can worked with 64M sdram.

his method is same to me, But my uboot can't work.

can you tell me for detail method?

thanks!

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2009-07-31 09:56:56     Re: how to config sdram 64Mbyte in uclinux(533ezkit)?

Robin Getz (UNITED STATES)

Message: 78259   

Miaolf:

First question is -- are you using a custom board? or an EZKit? many EZkits only have 32Meg.