1. Go to the following path and choose which machine you want to switch the boot source
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~/yocto/sources/meta-ma35d1/conf/machine$
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UBOOT_CONFIG[sdcard] = "ma35d1_sdcard1_defconfig"
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~/youcto/build$ bitbake u-boot-ma35d1 tf-a-ma35d1 –C compile
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~/youcto/build$ bitbake nvt-image-qt5 –c cleanall
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~/youcto/build$ bitbake nvt-image-qt5
Buildroot:
1. Execute Buildroot menuconfig
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~/Buildroot_MA35D1$ make menuconfig
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Bootloaders --->
(ma35d1_sdcard1) Board defconfig
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~/Buildroot_MA35D1$ make uboot-dirclean arm-trusted-firmware-dirclean
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~/Buildroot_MA35D1$ make
#MA35D1 #boot source #SD #eMMC