- sf
sf是操作spi接口 的flash的
sf probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus and chip select
sf read addr offset len - read `len' bytes starting at`offset' to memory at `addr'
sf write addr offset len - write `len' bytes from memor at `addr' to flash at `offset'
sf erase offset [+]len - erase `len' bytes from `offset' `+len' round up `len' to block size
- bootm 引导内存中的系统镜像
bootm addr
烧写内核时要注意,内核要和uboot的分区对应起来起始地址和长度不能错,否则会报错。