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sd卡烧写分为自动烧写与手动烧写： 自动烧写 在做好的启动卡内复制相关镜像后，接到板子上，系统会根据镜像自动更新nand里的镜像。烧写过程无须人工干预，适合量产时使用。 手动烧写 在sd卡复制镜像后，启动板子，进入菜单选择要更新的镜像，自定义程度较自动烧写高。 tf卡脱机自动烧写 自动烧写要先制作tf启动卡，具体方法可以参考《制作sd启动卡》章节。 准备镜像 embedsky.com光盘的烧写镜像在：TQIMX6UL_COREB_CD/出厂烧录镜像合集/Linux 镜像/，使用sd卡脱机烧写时，拷贝到tf卡中的镜像需要修改为默认名称，以下是使用的默认名称。
镜像内容 | 默认镜像名称 | Bootloader镜像 | u-boot.imx | 内核镜像 | zImage | Dtb镜像 | tq-imx6ul.dtb | 文件系镜像 | rootfs.ubifs |
1. 将做好的tf卡(启动卡)插到电脑上。 2. 将要烧写的镜像复制tf卡里的第一个分区(vfat 格式)里的根目录下。 注： tq-imx6ul_net0_uart.dtb和tq-imx6ul_net0_net1.dtb根据实际要求二选一。 tq-imx6ul_net0_uart.dtb为双网卡+6 串口的配置，tq-imx6ul_net0_uart.dtb为单网卡+8串口的配置。 $ ls /media/qingleqq/DF15-3F7C/ $ cp u-boot_tqimx6ul_v1.0.imx zImage_tqimx6ul_v1.0 tq-imx6ul_net0_uart.dtb rootfs_tqimx6ul.ubifs /media/qingleqq/DF15-3F7C/. 将镜像名修改为默认名称，步骤略。 $ ls /media/qingleqq/DF15-3F7C/* tq-imx6ul.dtb rootfs.ubifs u-boot.imx zImage /media/qingleqq/DF15-3F7C/为笔者sd 卡挂载目录，只作参考，以实际为准。
如果有不想更新的镜像，可以不复制。如：只想更新内核，则可只复制内核镜像。 烧写 将tf卡插到板子上，上电，系统会自动烧写。烧写完成后系统会自动启动。系统会将第一个分区默认成fat模式，并分别查找u-boot.imx、tq-imx6ul.dtb、zImage、rootfs.ubifs。找到文件就读取并烧写，如果文件不存在就略过，以下是自动烧写全镜像的打印。embedsky.com U-Boot 2016.03-gd294d2c-dirty (Feb 24 2017 - 09:08:25 +0800)
CPU: Freescale i.MX6UL rev1.1 528 MHz (running at 396 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 38C
Reset cause: POR
Board: MX6UL 14x14 EVK
I2C: ready
DRAM: 512 MiB
NAND: 1024 MiB
MMC: FSL_SDHC: 0, FSL_SDHC: 1
*** Warning - bad CRC, using default environment
Display: TN92 (800x480)
Video: 800x480x24
Error: no valid bmp image at 85800000
In: serial
Out: serial
Err: serial
Net: FEC0
Normal Boot
Hit any key to stop autoboot: 0
reading u-boot.imx
613376 bytes read in 67 ms (8.7 MiB/s)
nand erase.part u-boot;
NAND erase.part: device 0 offset 0x0, size 0x400000
Erasing at 0x3e0000 -- 100% complete.
OK
filesize = 95c00
nand write.e 807ffc00 0x100000 96000
NAND write: device 0 offset 0x100000, size 0x96000
614400 bytes written: OK
reading **.bmp
131638 bytes read in 28 ms (4.5 MiB/s)
NAND erase.part: device 0 offset 0x600000, size 0x400000
Erasing at 0x9e0000 -- 100% complete.
OK
NAND write: device 0 offset 0x600000, size 0x20236
131638 bytes written: OK
reading zImage
5994032 bytes read in 522 ms (11 MiB/s)
NAND erase.part: device 0 offset 0xa00000, size 0xa00000
Erasing at 0x13e0000 -- 100% complete.
OK
NAND write: device 0 offset 0xa00000, size 0x5b7630
5994032 bytes written: OK
NAND erase.part: device 0 offset 0x1400000, size 0x200000
Erasing at 0x15e0000 -- 100% complete.
OK
reading tq-imx6ul.dtb
35384 bytes read in 20 ms (1.7 MiB/s)
NAND write: device 0 offset 0x1400000, size 0x8a38
35384 bytes written: OK
reading rootfs.ubifs
86851584 bytes read in 7372 ms (11.2 MiB/s)
NAND erase.part: device 0 offset 0x1600000, size 0xea00000
Skipping bad block at 0x06c40000
Skipping bad block at 0x06c80000
Erasing at 0xffe0000 -- 100% complete.
OK
ubi0: attaching mtd1
ubi0: scanning is finished
ubi0: empty MTD device detected
ubi0: attached mtd1 (name "mtd=5", size 234 MiB)
ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
ubi0: good PEBs: 1870, bad PEBs: 2, corrupted PEBs: 0
ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 1/0, WL threshold: 4096, image sequence number:
0
ubi0: available PEBs: 1828, total reserved PEBs: 42, PEBs reserved for bad PEB
handling: 38
No size specified -> Using max size (232112128)
Creating dynamic volume rootfs of size 232112128
86851584 bytes written to volume rootfs
use nandboot
NAND read: device 0 offset 0xa00000, size 0xa00000
10485760 bytes read: OK
NAND read: device 0 offset 0x1400000, size 0x200000
2097152 bytes read: OK
Kernel image [url=home.php?mod=space&uid=72445]@[/url] 0x80800000 [ 0x000000 - 0x5b7630 ]
## Flattened Device Tree blob at 83000000
Booting using the fdt blob at 0x83000000
Using Device Tree in place at 83000000, end 8300ba37
Modify /soc/aips-bus@02000000/bee@02044000:status disabled
ft_system_setup for mx6
Starting kernel ...
Booting Linux on physical CPU 0x0
Linux version 4.1.15-ga2a1e0e-dirty (qingleqq@z-work) (gcc version 5.3.1
20160412 (Linaro GCC 5.3-2016.05) ) #24 SMP PREEMPT Thu Feb 23 11:09:49 CST 2017
CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine model: Freescale i.MX6 UltraLite 14x14 EVK Board
Reserved memory: created CMA memory pool at 0x8c000000, size 320 MiB
Reserved memory: initialized node linux,cma, compatible id shared-dma-pool
Memory policy: Data cache writealloc
PERCPU: Embedded 12 pages/cpu @8bb32000 s16960 r8192 d24000 u49152
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
Kernel command line: console=ttySAC0,115200 panel=TN92 root=ubi0:rootfs
rootfstype=ubifs ubi.mtd=5
mtdparts=gpmi-nand:4m(u-boot),2m(u-boot-env),4m(**),10m(kernel),2m(dtb),-(
rootfs) rootwait rw
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 178956K/524288K available (8350K kernel code, 387K rwdata, 2780K rodata,
324K init, 442K bss, 17652K reserved, 327680K cma-reserved, 0K highmem)
Virtual kernel memory layout:
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