AnsweredAssumed Answered

Yocto U-boot problems

Question asked by Otto Blom on May 14, 2014
Latest reply on May 14, 2014 by Otto Blom

Hi There,


I'm trying out the new Yocto BSP 1.0.0 and so far it builds but I'm having some trouble getting mmc running in u-boot on our custom board. While troubleshooting this I ran into some trouble with GDB. If I build the full image (bitbake fsl-image-dfb) and dump that onto the SD card u-boot always comes up as follows


CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

CPU:   Temperature 45 C, calibration data: 0x58d4f269

Reset cause: POR

Board: MX6Q/SDL-SabreSD

I2C:   ready

DRAM:  1 GiB


MMC Device 1 not found

No MMC card found

Using default environment


However, when I use my BDI3000 and GDB to load the image ("u-boot-imx/2013.04-r0/git/u-boot") I can single-step through just fine, as soon as I "continue" it jumps into the weeds and nothing ever prints to the console. GDB u-boot debugging works fine on the old LTIB 4.1.0 BSP.  I don't necessarily need gdb, but the problem is that the compile-test-repeat cycle is at a glacial pace when rebuilding the whole SD card image. Any ideas on what could be the culprit ?


I noticed there is a "u-boot-imx6qsabresd.imx" file in the images directory. What is this file used for ? I'm hoping that can be copied directly to an SD card somehow.