Rivers
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Hi3519DV500 spi nand flash启动异常，BOOTROM引导无法跳转到u-boot
Hi3519DV500方案，编译电池类的uboot表格，打板使用4线的spi nand flash，电源控制使用了PMC,连接电池后PMC自动就给供电区供电了（这是疑点之一，按照文档需要触发上电时序才能给后面的供电区供电的），然后接电池之后串口打印如下：
flash
24
44
50
61
soft rst
wfi entry
以确定连接电池后DDR、flash的供电都正常，FLASH比主芯片早复位200多毫秒。
uboot是通过编译整个bsp目录编译出来的
有大佬知道是什么原因吗？是PMC供电异常还是其他问题？
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回答14个
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log看 这是没固件了 重新烧录吧
可以确定flash是uboot的，就是不知道什么原因导致没有读到flash的uboot,海思用烧录器烧的flash是需要做什么特殊处理才能被识别到吗？我们打的板没有预留usb和eth,所以没办法用toolplatform烧写
你能确定啥了？ 你的spi nand flash 型号，uboot 能支持么 ？ 怎么烧录到spi nand flash的？
说了 log上看 uboot多没启动 压根没fw运行
我确定的是我用烧录器把uboot烧录到flash里面了（这一点反复验证过了），flash型号uboot也支持，用的是官方支持列表的型号，对应flash引脚驱动也在uboot代码里面确认过了。
问题就是为什么uboot没启动？
上面的打印是芯片中内置启动 ROM（BOOTROM）开始执行启动识别到启动介质是flash后输出的信息
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或将文件直接拖到这里
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