[参考译文] PROCESSOR-SDK-J784S4：SBL OSPI HLOS 引导

您好、

我想使用 combined_dev.appimage 进行引导、我的问题是 a72.spl 尝试从哪里加载 u-boot？ 需要在哪里刷写 u-boot 映像？

请参阅以下步骤：如果这对您有所帮助、请告知我们。

Step 1:

Download tisdk-default-image-<board_name>.wic.xz from the below links

tisdk-default-image-j784s4-evm.wic.xz

for j721e : lcpd.gt.design.ti.com/.../
for j7200 : lcpd.gt.design.ti.com/.../
for j721s2 : lcpd.gt.design.ti.com/.../
for j784s4 : lcpd.gt.design.ti.com/.../

tisdk-default-image-j784s4-evm.wic.xz

Step 2:
Flash the above image to the SD card using balena etcher tool. You can download the same from https://www.balena.io/etcher/

Step 3:
Remove all images from the boot partition of SD card using rm command

    Open terminal in boot partition of SD card
    sudo rm -rf *
    
Step 4:
Insert SD card into the evm

Step 5:
 
Build sbl_ospi_img_hlos_mcu1_0_release.tiimage by using the following command

    make BOARD=<board_name>sbl_ospi_img_hlos -sj
    
Step 6:
 
 Change the boot switch settings to UART bootmode.

Step 7:

 Flash uart flash programmer (below commands are suitable for linux PC)

    sudo <path to uniflash tool>/uniflash_8.0.0/dslite.sh --mode processors -c /dev/ttyUSB* -f <path to uniflash tool>/uniflash_8.0.0/processors/FlashWriter/<board_name>/uart_<board_name>_flash_programmer_release.tiimage -i 0
    
Step 8:
    
 Flash sbl_ospi_img_hlos_mcu1_0_release.tiimage at 0x0

    sudo <path to uniflash tool>/uniflash_8.0.0/dslite.sh --mode processors -c /dev/ttyUSB* -f <pdk install path>/pdk/packages/ti/boot/sbl/binary/<board_name>/ospi/bin/sbl_ospi_img_hlos_mcu1_0_release.tiimage -d 3 -o 0
    
Step 9:

 Flash tifs.bin at 0x80000

    j784s4 : sudo <path to uniflash tool>/uniflash_8.0.0/dslite.sh --mode processors -c /dev/ttyUSB* -f <pdk install path>/pdk/packages/ti/drv/sciclient/soc/V6/tifs.bin -d 3 -o 80000
    
Step 10: 

Flash combined_dev.appimage at 0x100000 using the following command

sudo <path to uniflash tool>/uniflash_8.0.0/dslite.sh --mode processors -c /dev/ttyUSB* -f <pdk install path>/pdk/packages/ti/boot/sbl/tools/combined_appimage/bin/<board_name>/combined_dev.appimage -d 3 -o 100000 

此致、
Karthik