用UUU工具烧录I.MX8 问题

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大家好；

最近新设计了一个I.MX8 MINI QUAD+EMMC+LPDDR4的板子，回来用USB连接到电脑后，用UUU工具能够检测到板子，log如下
D:\Tools\uuu>uuu -lsusb
uuu (Universal Update Utility) for nxp imx chips -- libuuu_1.5.141-0-gde317f5

Connected Known USB Devices
        Path     Chip    Pro     Vid     Pid     BcdVersion
        ==================================================
        1:33     MX8MM   SDP:    0x1FC9 0x0134   0x0101


但是执行烧写 命令后 ，直接显示100%并且一直停在以下界面。无论等多久都没有其它任何进度或变化。
D:\Tools\uuu>uuu -b emmc_all flash.bin rootfs.sdcard
uuu (Universal Update Utility) for nxp imx chips -- libuuu_1.5.141-0-gde317f5

Success 0    Failure 0


1:33     1/ 1 [=================100%=================] SDP: boot -f flash.bin -scanlimited 0x800000

在执行烧写命令以后，uart2输出信息如下
U-Boot SPL 2018.03-00924-g654088c-dirty (Jun 05 2022 - 20:04:16 -0700)
power_pca9450_init
Can't find PMIC PCA9450
DRAM PHY training for 2400MTS
check ddr4_pmu_train_imem code
check ddr4_pmu_train_imem code pass
check ddr4_pmu_train_dmem code
check ddr4_pmu_train_dmem code pass
Training FAILED
DRAM PHY training for 1336MTS
check ddr4_pmu_train_imem code
check ddr4_pmu_train_imem code pass
check ddr4_pmu_train_dmem code
check ddr4_pmu_train_dmem code pass
Training FAILED
DRAM PHY training for 2400MTS
check ddr4_pmu_train_imem code
check ddr4_pmu_train_imem code pass
check ddr4_pmu_train_dmem code
check ddr4_pmu_train_dmem code pass
Training FAILED
Normal Boot
Trying to boot from USB SDP


因为UART4在硬件设计时没有使用，所以目前只有UART2可以用

求大神指点一下解决方向

我知道答案 目前已有0人回答

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