[FAQ] TDA4VH:Enable saveenv feature in SDCARD , eMMC and a workaround for saveenv in OSPI flash.

Hi,

Below are the steps to enable saveenv on different boot medias.

SAVE ENABLE ON SD CARD FAT PARTITION:

In order to save the env to SD card , the below changes must be added to the corresponding A72/A53 defconfig file of the corresponding board specific file of U-BOOT.

SAVE ENV ENABLE ON EMMC BOOT 0 PARTITION:

1) In order to save the env to EMMC , the below changes must be added to the corresponding A72/A53 defconfig file of the corresponding board specific file of U-BOOT.

2)Once the above changes are made,rebuild Uboot.

3)Now to save the environment variables,enter into Uboot:

=>setenv ...

=>setenv ...

=>savenv

4)Reboot

Note : The value assigned to CONFIG_ENV_OFFSET variable may vary from board to board.Hence,it is advised to look into the SDK documentation of the respective board for cross-verifying the offset values.

WORKAROUND FOR SAVEENV IN OSPI FLASH:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1400212/faq-tda4vm-how-to-use-uenv-txt-to-configure-u-boot-env-when-using-ospi-as-boot-media