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 Post subject: Booting tha SAMA5D28CU Custom Board Based on the SAMA5D2Xpla
PostPosted: Tue May 16, 2017 9:17 am 
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Joined: Mon Mar 06, 2017 10:08 am
Posts: 3
Hi,
I have SAMA5D28CU Custom board Based on the SAMA5D2 Xplained Board. Only Difference is we changed the 512MB RAM to 256MB RAM.
I try to boot it from SD CARD. But I can not boot From SD card successfully.
AND Also i edited the file "AT91bootstrap/board/sama5d2_xplained/sama5d2_xplainedsd_uboot_defconfig"
Added "CONFIG_RAM_256MB=y" and Removed "CONFIG_RAM_512MB=y"
Compiled and port into my board. And power on the board, booting is struck in the Bootstrap. Boot log is below.

Boot Log :
RomBOOT


AT91Bootstrap 3.8.7 (Fri Oct 21 18:12:00 CEST 2016)

EEPROM: Loading AT24xx information ...
EEPROM: BoardName | [Revid] | VendorName
HW Info: The total size: 0xff isn't correct

EEPROM: Using default information

EEPROM: Board sn: 0xd300000 revision: 0x248000

SD/MMC: Image: Read file u-boot.bin to 0x26f00000
SD: Card Capacity: High or Extended
SD: Specification Version 3.0X
SD/MMC: Done to load image


Any suggestion is more helpful.

Thanks,
Vinothraj


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 Post subject: Re: Booting tha SAMA5D28CU Custom Board Based on the SAMA5D2
PostPosted: Tue May 16, 2017 8:54 pm 
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Joined: Thu Apr 19, 2007 10:15 pm
Posts: 1419
Location: USA
vinothraj wrote:
I have SAMA5D28CU Custom board Based on the SAMA5D2 Xplained Board.
Are you using MRL-A parts or MRL-B parts?

vinothraj wrote:
SD/MMC: Done to load image
The next step would be to execute the U-Boot that was loaded into DRAM.

So how extensively have you checked out your "custom board"?
What kind of memory tests have you performed?

Regards


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 Post subject: Re: Booting tha SAMA5D28CU Custom Board Based on the SAMA5D2
PostPosted: Wed May 17, 2017 9:22 am 
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Joined: Mon Mar 06, 2017 10:08 am
Posts: 3
Hi Blue_z,
Thanks for your kind reply.

blue_z wrote:
Are you using MRL-A parts or MRL-B parts?


we are using MRL-C parts.

blue_z wrote:
So how extensively have you checked out your "custom board"?
What kind of memory tests have you performed?

Only put Print statement in DDR3 Initialization function in hw_init function in bootstrap source.
Please tell how can i perform the memory test to test the RAM ?



Regards,
Vinothraj.


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 Post subject: Re: Booting tha SAMA5D28CU Custom Board Based on the SAMA5D2
PostPosted: Wed May 17, 2017 8:54 pm 
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Joined: Thu Apr 19, 2007 10:15 pm
Posts: 1419
Location: USA
vinothraj wrote:
we are using MRL-C parts.
Is that some pre-production sample?
Those are not documented or available AFAICT.
vinothraj wrote:
Only put Print statement in DDR3 Initialization function in hw_init function in bootstrap source.
Please tell how can i perform the memory test to test the RAM ?
See http://www.at91.com/discussions/viewtop ... tic#p48957

Regards


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 Post subject: Re: Booting tha SAMA5D28CU Custom Board Based on the SAMA5D2
PostPosted: Thu May 18, 2017 4:14 pm 
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Joined: Mon Mar 06, 2017 10:08 am
Posts: 3
blue_z wrote:
vinothraj wrote:
we are using MRL-C parts.
Is that some pre-production sample?

Regards

we get datasheet from Microchip person.

Thanks for your reply.

I got successful boot on my custom board.

Bootstrap/board/sama5d2_xplained/sama5d2_xplained.c
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
ddramc_config->mdr = (AT91C_DDRC2_DBW_16_BITS
| AT91C_DDRC2_MD_DDR3_SDRAM); /// AT91C_DDRC2_DBW_32_BITS


i changed the "AT91C_DDRC2_DBW_32_BITS" to "AT91C_DDRC2_DBW_16_BITS" as per my board hardware.

Thanks again :)

Regards,
Vinothraj.


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