请问一下这一款目前是没有支持的固件吗，用串口烧录，fastboot一直报错。

校验fastbootKey区失败，请检查fastboot；
Failed to send the auxiliary code data.It may be caused by the following reason:

1. The secure boot function of Hi3796M V200, Hi3716M V450, and Hi3796A V200 chips is enabled, but the auxiliary code area is not correctly signed
2. If verification of multiple tables is not supported, the tables may be incorrect or the DDR training may be faulty due to DDR exceptions. As a result, the DDR cannot be used.
   Failed to download fastboot!