SoCrates boot problem with custom preloader

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I'm using SoCrates V1.2 devboard.

I've started to study perfoming tasks from SoCrates Workshop Labs.

Lab 1 with no problem.

Lab 2 - got next problem: U-Boot can't initialize the sd card when using my preloader (preloader-mkimage.bin made by using instructions from Lab).

Here is the boot log:

u-boot 2012.10-00002-g97ca318 (jul 04 2013 - 13:18:58)

cpu : altera socfpga platform

board : ebv socrates - cyclone v soc fpga board

dram: 1 gib

mmc: designware sd/mmc: 0

error: dw_pull: stat 0x200

request failed. status: 0x00000200

error: dw_pull: stat 0x200

request failed. status: 0x00000200

error: dw_pull: stat 0x200

request failed. status: 0x00000200

error: dw_pull: stat 0x200

request failed. status: 0x00000200

mmc init failed

But everything goes fine when using preloader supplied with the devboard.

Please help me to find a solution.

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Hello

I've faced the same problem when I generated preloader with Quartus 13.1 for SD card provided with the board.

Please download this archive: http://www.rocketboards.org/pub/documentation/ebvsocratesworkshops/socrates-training.tgz

There's a script to create fresh SD card with all you need to load linux. So you need to use this script.

Here's reference design for Q13.1: http://www.rocketboards.org/pub/projects/socrateshwreferencedesign/socrates_simplerd_v13.1.zip

If you generate preloader and write it to SD card everything should be OK.

Also I would recommend to use PUTTY instead of TerraTerm. For me it works more stable.

Regards