esp-idf/components/esptool_py/flasher_args.json.in

{
    "write_flash_args" : [ "--flash_mode", "${ESPFLASHMODE}",
                           "--flash_size", "${ESPFLASHSIZE}",
                           "--flash_freq", "${ESPFLASHFREQ}" ],
    "flash_files" : {
        "0x1000" : "bootloader/bootloader.bin",
        "0x8000" : "partition_table/partition-table.bin",
        "${CONFIG_APP_OFFSET}" : "${PROJECT_NAME}.bin",
        "${PHY_PARTITION_OFFSET}" : "${PHY_PARTITION_BIN_FILE}"
    }
}