NXP i.MX8M Mini烧录固件的方式主要通过uuu工具进行烧录, 这个工具本身开源，但是提供给开发者烧录的方式及其不友好, 不得不吐槽。
烧录固件
如果没有uuu的文档，真心看不懂uuu.auto的语法。其中应该主要是为兼容Linux烧录,封装了fastboot协议而写的一套规则。
烧录固件 : uuu uuu.auto
代码语言：javascript复制uuu.auto
uuu_version 1.0.1
SDP: boot -f imx-boot-imx8mmevk-sd.bin-flash_evk
# This command will be run when use SPL
SDPU: delay 1000
SDPU: write -f imx-boot-imx8mmevk-sd.bin-flash_evk -offset 0x57c00
SDPU: jump
# This command will be run when ROM support stream mode
SDPS: boot -f imx-boot-imx8mmevk-sd.bin-flash_evk
FB: ucmd setenv fastboot_dev mmc
FB: ucmd setenv mmcdev ${emmc_dev}
FB: ucmd mmc dev ${emmc_dev}
#FB: flash -raw2sparse all sdcard.img
FB: flash -raw2sparse all core-image-minimal-imx8mmevk-20190521120542.rootfs.sdcard
FB: flash bootloader imx-boot-imx8mmevk-sd.bin-flash_evk
FB: ucmd mmc partconf ${emmc_dev} 0 1 0
FB: done- 调试快速烧录
开发板开机进入uboot界面
代码语言：javascript复制fastboot ttyUSB1 (指定烧录口)PC端通过uuu运行
代码语言：javascript复制uuu FB: flash -raw2sparse all sdcard.img`系统分区
一般的系统分区可以通过dts中的参数配置，比如Amlogic A113X
代码语言：javascript复制// arch/arm64/boot/dts/amlogic/xxx.dts
mtd_nand {
compatible = "amlogic, aml_mtd_nand";
dev_name = "mtdnand";
status = "disable";
reg = <0x0 0xFFE07800 0x0 0x200>;
interrupts = < 0 34 1 >;
pinctrl-names = "nand_rb_mod","nand_norb_mod", "nand_cs_only";
pinctrl-0 = <&all_nand_pins>;
pinctrl-1 = <&all_nand_pins>;
pinctrl-2 = <&nand_cs_pins>;
device_id = <0>;
/*fip/tpl configurations, must be same
* with uboot if bl_mode was set as 1
* bl_mode: 0 compact mode; 1 descrete mode
* if bl_mode was set as 1, fip configeration will work
*/
bl_mode = <1>;
/*copy count of fip*/
fip_copies = <4>;
/*size of each fip copy */
fip_size = <0x200000>;
nand_clk_ctrl = <0xFFE07000>;
plat-names = "bootloader","nandnormal";
plat-num = <2>;
plat-part-0 = <&bootloader>;
plat-part-1 = <&nandnormal>;
bootloader: bootloader{
enable_pad ="ce0";
busy_pad = "rb0";
timming_mode = "mode5";
bch_mode = "bch8_1k";
t_rea = <20>;
t_rhoh = <15>;
chip_num = <1>;
part_num = <0>;
rb_detect = <1>;
};
nandnormal: nandnormal{
enable_pad ="ce0";
busy_pad = "rb0";
timming_mode = "mode5";
bch_mode = "bch8_1k";
plane_mode = "twoplane";
t_rea = <20>;
t_rhoh = <15>;
chip_num = <2>;
part_num = <3>;
partition = <&nand_partitions>;
rb_detect = <1>;
};
nand_partitions:nand_partition{
/*
* if bl_mode is 1, tpl size was generate by
* fip_copies * fip_size which
* will not skip bad when calculating
* the partition size;
*
* if bl_mode is 0,
* tpl partition must be comment out.
*/
tpl{
offset=<0x0 0x0>;
size=<0x0 0x0>;
};
logo{
offset=<0x0 0x0>;
size=<0x0 0x200000>;
};
recovery{
offset=<0x0 0x0>;
size=<0x0 0x1000000>;
};
boot{
offset=<0x0 0x0>;
size=<0x0 0xF00000>;
};
system{
offset=<0x0 0x0>;
size=<0x0 0x82000000>;
};
};
};而针对NXP i.MX8M Mini这边，并没有提供DTS的配置方式，而是通过uuu工具来实现的。官方资料中提供了kernel_emmc.uuu参考例子。
代码语言：javascript复制// create partition
FBK: ucmd mmc=`cat /tmp/mmcdev`; PARTSTR=$'10M,500M,0cn600M,,83n'; echo "$PARTSTR" | sfdisk --force /dev/mmcblk${mmc}
