UART DOWNLOAD MODE
config config_pkg_product_usb.ini in section [package_info]
arg_pkg_path_val =C:\XXX\YYY\EC800ZCNLER03A01M04_BETA20230711\at_command.binpkg 

Package burn
step 1,  package extract and check
FlashToolCLI.exe --cfgfile config_pkg_product_usb.ini pkg2img

step 2 connect
FlashToolCLI.exe --cfgfile config_pkg_product_usb.ini --port COM25 probe

step 3 erase
FlashToolCLI.exe --skipconnect 1 --cfgfile config_pkg_product_usb.ini --port COM25 flasherase 0 0 --stor_type "intrinsic_flash"


step 4 burn
#if flexfile configured in config_ec618_uart.ini, add flexfile0 to --imglist ,like --imglist bootloader system cp_system flexfile0
FlashToolCLI.exe --skipconnect 1 --cfgfile config_pkg_product_usb.ini --verbose 1 --port COM25 burnbatch --imglist bootloader system cp_system

step5 reset
FlashToolCLI.exe --skipconnect 1 --cfgfile config_pkg_product_usb.ini --port COM25 sysreset