介绍一种通过AXD + JLINK的方式调试UBOOT。在UBOOT移植过程中，需要反复测试移植的UBOOT是否正常工作。因此，将生成的u-boot.bin文件装载到SDRAM里调试运行将有助于大大提高调试效率，而不必每次都将其烧录至FLASH里。该文档介绍此种调试方法的步骤-Is introduced by the AXD+ JLINK way to debug UBOOT. In UBOOT transplant process, the need to repeatedly test the transplant UBOOT is working properly. Therefore, the resulting u-boot.bin file to load to SDRAM, debugging and running will help to greatly improve the efficiency of debugging, without having to always burn to the FLASH. This document describes the steps of such a testing method