By "Android™ Quick Start Guide" , Chapter 8.Working with the i.MX 7Dual SABRE-SD Board
Prepare the board image(8.2) & follow the 8.3 Flashing board images ,
Finish the download process by "Mfgtool" and
set U-boot environment variables by 8.4 .
It still cannot boot to Android from SD .
Please check my log : iMX7_SD_flash.log
Do I lack some process ?
PS:I'm using a new/empty SD card