i.mx6 not booting uboot

[bhaskerreddyvar]

working on i.mx6(MCIMX6Q6AV10AC), the processor is not booting(Uboot) from any of the boot modes(SD, SPI, eMMC), when connected through JTAG and run a small code to transmit message on Serial port it is found that messages are transmitted but with slow speed

check all the power supplies and foudn ok, Reset is ok

[igorpadykov]

Hi bhasker

it may be recommended to run ddr test

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

and rebuild uboot with new ddr settings (found from ddr test)

in uboot dcd header (like flash_header.S).

Boot peripherals (SD, SPI, eMMC) can be tested with SDK

i.MX6Q|i.MX 6Quad Processors|Quad Core|Freescale

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[bhaskerreddyvar]

Hi igor,

thank you very much for the information

there was a problem in the power supply, instead of 1.35V we are giving 1.2V for core supply for i.mxq base don speed of the device

now the processor is booting after increasing the core supply to 1.35V

But the processor is  not booting on poweron, but only booting on manual RESET(some time not booting on RESET also)

Regards

Bhasker

[igorpadykov]

Hi bhasker

this may be caused by ddr, please run ddr test

and rebuild uboot with new ddr settings

Best regards

igor