Partition Start Sector Num Sectors Type
1 2048 7829504 83
## Unknown partition table
2. fatls 列出fat文件系统中的内容,i其用法如下:
usage: fatls <interface> <dev[:part]> [directory] interface是指定哪种类型的设备，此处笔者用的usb设备，因此填入usb，dev就是设备号，笔者从以上命令得知为0
linuxidc # fatls usb 0
187495 check.png
system volume information/
4051616 uimage
hello/
.trash-1000/
2 file(s), 3 dir(s)
3. fatload 从u盘加载文件到指定内存地址处，用法如下:
usage: fatload <interface> <dev[:part]> <addr> <filename> [bytes] interface和dev不再叙述，addr 指定要加载文件到内存的某个地址，filename指定要加载的文件名
linuxidc # fatload usb 0 0x42000000 uimage
reading uimage
..............................................................................
...............................................................................
................................................................................
...................................................................................
...........................................................................
4221634 bytes read
4.sf 支持spi/qspi flash的操作,必须先擦除再写
4.1 sf probe 在操作spi flash之前必须进行此操作:
linuxidc # sf probe 0
32768 KiB spi_flash at 0:0 is now current device
4.2 sf erase 擦除操作:
linuxidc # sf erase 0x100000 0x400000 (0x100000是要擦除的起始地址，0x400000为指定要擦除的大小)
Erasing at 0x500000 -- 100% complete.
4.3 sf write 写操作:
linuxidc # sf write 0x42000000 0x100000 0x400000
Writing at 0x500000 -- 100% complete.
分析uboot中 make xxx_config过程