i.MX ProcessorsのトピックQuestion about Dual-Lite CPU boot up issue.

Question about Dual-Lite CPU boot up issue.

edwinrose — Thu, 08 May 2014 09:01:53 GMT

Hi experts,

I have a i.MX6 boot-up issue for Dual-lite CPU.

With the same PCB layout, I use four different CPUs.

1. Quad-Core Automotive (MCIMX6Q6AVT10AC)

2. Quad-Core Extend Commercial (MCIMX6Q5EYM10AC)

3. Dual-Core Automotive (MCIMX6D6AVT10AC)

4. Dual-Lite-Core Extend Commercial (MCIMX6U5EVM10AB)

And the power strap are followed AN4397 Hardware Design guide.

Now item 1~3 can boot up successfully, but item 4 (Dual-lite CPU) will boot up randomly.

I have use DDR3 calibration tool to get the ddr parameters and put into u-boot image.

But the issue still appear, the system will hang on "Hit any key to stop autoboot: 0" (please see the attached picture).

Does anybody has the similiar issue? Please give me some directions to solve this issue.

Thanks for your comments.

Re: Question about Dual-Lite CPU boot up issue.

igorpadykov — Mon, 12 May 2014 04:22:24 GMT

Hi edwin,

probably you did not set correctly Uboot kernel parameters,

for example check that maxcpus=2.

Please check i.MX_6Solo6DualLite_SABRE-SDP_Linux_User's_Guide.pdf

and enter to Uboot environment variables.

Re: Re: Question about Dual-Lite CPU boot up issue.

edwinrose — Mon, 12 May 2014 08:36:07 GMT

Hi chipexpert,

Thanks for your feedback.

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Following are our system environment setting, did we have any wrong setting?

MX6SDL SABRESD U-Boot > pri

bootdelay=3

baudrate=115200

ipaddr=192.168.1.103

serverip=192.168.1.101

netmask=255.255.255.0

loadaddr=0x10800000

rd_loadaddr=0x11000000

netdev=eth0

ethprime=FEC0

fastboot_dev=mmc3

splashimage=0x30000000

splashpos=m,m

lvds_num=1

ethact=FEC0

bootargs=console=ttymxc0,115200 androidboot.console=ttymxc0 vmalloc=400M init=/init video=mxcfb0:dev=ldb,LDB-XGA,if=RGB18 video=mxcfb1:dev=ldb,LDB-XGA,if=RGB18 ldb=dul1

bootcmd=booti mmc1

stdin=serial

stdout=serial

stderr=serial

bootargs_base=<NULL> fec_mac=ff:ff:ff:ff:ff:ff

Environment size: 518/8188 bytes

Besides, we found that the system will boot up more smoothly when the PCB board in higher temperature.

Do you have any idea for this situation? Thanks for your help.

Re: Question about Dual-Lite CPU boot up issue.

igorpadykov — Tue, 13 May 2014 08:49:01 GMT

Hi edwin,

If board boots well on high temperature then something wrong with DDR

- you should configure it more accurately using links below

and tweak drive strengths both i.MX6 and DDR part

https://community.freescale.com/message/331721#331721

https://community.freescale.com/docs/DOC-96412

Also did you try Linux ?

Best regards

chip

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