topic Re: u-boot standalone application in sabre SD board in i.MX Processors

u-boot standalone application in sabre SD board

karthikas — Thu, 23 Aug 2018 09:35:45 GMT

Hello.,.,

I am working on imx6 dual lite sabre SD board(free scale board), In this i managed to compile u-boot image and boot it from SD card(SD card slot3), my requirement is to run a standalone example from SD card, I tried by copying hello_world .bin(which is already been compiled with u-boot) file to fat partition of SD card and tried to load by using fatload command, but it was showing

MMC: no card present
** Bad device mmc **

Any suggestions or some references would be appreciated lot.

Re: u-boot standalone application in sabre SD board

nxf45220 — Mon, 27 Aug 2018 01:30:51 GMT

Hi karthik,

You could modified the mmc block 0:1 or 1:1. Example: fatload mmc 1:1 0x00907000

It works when I performed the ddr stress test in uboot, hope it works, thanks!

Re: u-boot standalone application in sabre SD board

karthikas — Mon, 27 Aug 2018 05:42:54 GMT

Hai.,.,

Thanks for the response.

Yes you are correct, after changing to mmc 1:1 it was loading into RAM successfully , Now if I give go command its throwing a data abort error and also board is getting Reset. Any Idea what could be the issue,

I am running standalone program without modifying single line

Here is the log

=>
=> fatload mmc 1:2 0x12000000 hello_world.bin
578 bytes read in 13 ms (43 KiB/s)
=>
=> go 0x12000000
## Starting application at 0x12000000 ...
data abort
pc : [<12000008>]          lr : [<4ff683d7>]
reloc pc : [<d989b008>]    lr : [<178033d7>]
sp : 4f564d48 ip : 0000001c     fp : 00000002
r10: 4ffc436c r9 : 4f564ea8     r8 : 4f567938
r7 : 4ff683ad r6 : 00000002     r5 : 12000000 r4 : 4f56793c
r3 : 12000000 r2 : 4f56793c     r1 : 4f56793c r0 : 00000001
Flags: nzCv IRQs off FIQs off Mode SVC_32
Code: e4df8df7 cedfb73f 41f0e92d 46084605 (2400460e)
Resetting CPU ...

resetting ...

U-Boot SPL 2018.07-rc2-dirty (Aug 24 2018 - 10:03:53 +0530)
Trying to boot from MMC1

U-Boot 2018.07-rc2-dirty (Aug 24 2018 - 10:03:53 +0530)

CPU:   Freescale i.MX6Q rev1.2 996 MHz (running at 792 MHz)
CPU:   Automotive temperature grade (-40C to 125C) at 48C
Reset cause: WDOG
Board: MX6-SabreSD
I2C:   ready
DRAM: 1 GiB
PMIC: PFUZE100 ID=0x10
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
Loading Environment from MMC... *** Warning - bad CRC, using default environment

Failed (-5)
PCI:   pcie phy link never came up
No panel detected: default to Hannstar-XGA
Display: Hannstar-XGA (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   FEC [PRIME]
Press SPACE to abort autoboot in 2 seconds
=>
CTRL-A Z for help | 115200 8N1 | NOR | Minicom 2.7 | VT102 | Offline | ttyUSB0

Thank you.

Regards

Karthik

Re: u-boot standalone application in sabre SD board

nxf45220 — Mon, 27 Aug 2018 06:06:19 GMT

Environment of my Example:

MCIMX6D6AVT08AD + AI EVB

The address of my example is the start of the OCRAM, as pic shows.

From your log, you may load the .bin to a wrong place, you can check the chip RM to find a right one.

Not sure about this, hope it will work, thanks!

Re: u-boot standalone application in sabre SD board

karthikas — Mon, 27 Aug 2018 08:59:46 GMT

Hi.,

Actually as per our board environment (printenv) the loadADDR is 0x12000000, thats why I chosen this address, On what basis this address can be selected, and if i choose an address which are places i need to update address in u-boot source code.

Can you give some brief steps to create our own standalone program, and run it on u-boot.

Thank you.,