i.MX6ULL和STM32有啥区别？新手该入手哪个？能直接入手i.MX6ULL吗？

两者不是一个等级的，stm32属于单片机，一般是裸跑或者用类似freertos之类的嵌入式系统。I. mx6是嵌入式ARM功能强大，从单核到四核，可以处理图像视频，高速运算等任务。选择哪个根据你的需求而定，如果你目前学习基础的东西，建议从stm32入手，如果你已经比较熟悉了，对Linux系统，安卓系统都比较熟悉，可以入手imx6

已经手动将ucl2.xml 中Quad Nor Flash 内容改成如下

<LIST name="Quad Nor Flash" desc="Choose Quad Nor flash as media">

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx6q%board%_%nor%.imx" ifdev="MX6Q">Loading U-boot</CMD>

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx6dl%board%_%nor%.imx" ifdev="MX6D">Loading U-boot</CMD>

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx6slevk_spi-nor.imx" ifdev="MX6SL">Loading U-boot</CMD>

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx6sx%sxuboot%_sd.imx" ifdev="MX6SX">Loading U-boot</CMD>

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx7d%7duboot%_sd.imx" ifdev="MX7D">Loading U-boot</CMD>

<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot-imx6ulevk_qspi1.imx" ifdev="MX6UL">Loading U-boot</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage" address="0x12000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q MX6DL">Loading Kernel.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage" address="0x80800000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6SL MX6SX MX7D MX6UL">Loading Kernel.</CMD>

<CMD state="BootStrap" type="load" file="firmware/%initramfs%" address="0x12C00000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q MX6DL">Loading Initramfs.</CMD>

<CMD state="BootStrap" type="load" file="firmware/%initramfs%" address="0x83800000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6SL MX6SX MX7D MX6UL">Loading Initramfs.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx6q-%board%-%nordtb%.dtb" address="0x18000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q">Loading device tree.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx6dl-%board%-%nordtb%.dtb" address="0x18000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6D">Loading device tree.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx6sl-evk.dtb" address="0x83000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6SL">Loading device tree.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx6sx-%sxdtb%.dtb" address="0x83000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6SX">Loading device tree.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx7d-%7ddtb%.dtb" address="0x83000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX7D">Loading device tree.</CMD>

<CMD state="BootStrap" type="load" file="firmware/zImage-imx6ul-14x14-evk.dtb" address="0x83000000"

loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6UL">Loading device tree.</CMD>

<CMD state="BootStrap" type="jump" >Jumping to OS image. </CMD>

<CMD state="Updater" type="push" body="$ flash_erase /dev/mtd0 0 20">Erasing Boot partition</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-imx6q%board%_%nor%.imx" ifdev="MX6Q">Sending U-Boot</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-imx6dl%board%_%nor%.imx" ifdev="MX6D">Sending U-Boot</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-imx6slevk_spi-nor.imx" ifdev="MX6SL">Sending u-boot.bin</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-imx6sx%sxuboot%_%sxnor%.imx" ifdev="MX6SX">Sending u-boot.bin</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-imx7d%7duboot%_%7dnor%.imx" ifdev="MX7D">Sending u-boot.bin</CMD>

<CMD state="Updater" type="push" body="send" file="files/u-boot-im

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