Sometimes the system doesn't work when we first turn on the electricity!The UART LOG as follows,Can you tell me why?
It's ok to power up again after failing to start!
LOG:Hi tommy
such issue may happen due to ddr settings, so one can try
to rebuild image with new ddr calibration coefficients found from ddr test
i.MX6/7 DDR Stress Test Tool V2.90
Other reason may be unstable clock and power subsystem (check power-up
sequence and clock stability with oscilloscope), one can follow i.MX6 System Development
User’s Guide
https://www.nxp.com/docs/en/user-guide/IMX6DQ6SDLHDG.pdf
Best regards
igor
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