Introduction - If you have any usage issues, please Google them yourself
Results of experiments, the system starts, eight LED light will light up right. Debug in flash, you need to modify the RO BASE is 0x00000000, the other not modify, recompile download can run. Debugging in the sdram when the need to modify the RO BASE to 0xa0000000, others do not modify, recompile and download can be run.